platform/kernel/linux-rpi.git
23 months agodm thin: Fix UAF in run_timer_softirq()
Luo Meng [Tue, 29 Nov 2022 02:48:47 +0000 (10:48 +0800)]
dm thin: Fix UAF in run_timer_softirq()

When dm_resume() and dm_destroy() are concurrent, it will
lead to UAF, as follows:

 BUG: KASAN: use-after-free in __run_timers+0x173/0x710
 Write of size 8 at addr ffff88816d9490f0 by task swapper/0/0
<snip>
 Call Trace:
  <IRQ>
  dump_stack_lvl+0x73/0x9f
  print_report.cold+0x132/0xaa2
  _raw_spin_lock_irqsave+0xcd/0x160
  __run_timers+0x173/0x710
  kasan_report+0xad/0x110
  __run_timers+0x173/0x710
  __asan_store8+0x9c/0x140
  __run_timers+0x173/0x710
  call_timer_fn+0x310/0x310
  pvclock_clocksource_read+0xfa/0x250
  kvm_clock_read+0x2c/0x70
  kvm_clock_get_cycles+0xd/0x20
  ktime_get+0x5c/0x110
  lapic_next_event+0x38/0x50
  clockevents_program_event+0xf1/0x1e0
  run_timer_softirq+0x49/0x90
  __do_softirq+0x16e/0x62c
  __irq_exit_rcu+0x1fa/0x270
  irq_exit_rcu+0x12/0x20
  sysvec_apic_timer_interrupt+0x8e/0xc0

One of the concurrency UAF can be shown as below:

        use                                  free
do_resume                           |
  __find_device_hash_cell           |
    dm_get                          |
      atomic_inc(&md->holders)      |
                                    | dm_destroy
                                    |   __dm_destroy
                                    |     if (!dm_suspended_md(md))
                                    |     atomic_read(&md->holders)
                                    |     msleep(1)
  dm_resume                         |
    __dm_resume                     |
      dm_table_resume_targets       |
        pool_resume                 |
          do_waker  #add delay work |
  dm_put                            |
    atomic_dec(&md->holders)        |
                                    |     dm_table_destroy
                                    |       pool_dtr
                                    |         __pool_dec
                                    |           __pool_destroy
                                    |             destroy_workqueue
                                    |             kfree(pool) # free pool
        time out
__do_softirq
  run_timer_softirq # pool has already been freed

This can be easily reproduced using:
  1. create thin-pool
  2. dmsetup suspend pool
  3. dmsetup resume pool
  4. dmsetup remove_all # Concurrent with 3

The root cause of this UAF bug is that dm_resume() adds timer after
dm_destroy() skips cancelling the timer because of suspend status.
After timeout, it will call run_timer_softirq(), however pool has
already been freed. The concurrency UAF bug will happen.

Therefore, cancelling timer again in __pool_destroy().

Cc: stable@vger.kernel.org
Fixes: 991d9fa02da0d ("dm: add thin provisioning target")
Signed-off-by: Luo Meng <luomeng12@huawei.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
23 months agoLinux 6.1-rc7
Linus Torvalds [Sun, 27 Nov 2022 21:31:48 +0000 (13:31 -0800)]
Linux 6.1-rc7

23 months agoMerge tag 'pull-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Sun, 27 Nov 2022 20:40:06 +0000 (12:40 -0800)]
Merge tag 'pull-fixes' of git://git./linux/kernel/git/viro/vfs

Pull vfs fix from Al Viro:
 "Amir's copy_file_range() fix"

* tag 'pull-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  vfs: fix copy_file_range() averts filesystem freeze protection

23 months agoMerge tag 'usb-6.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Linus Torvalds [Sun, 27 Nov 2022 20:30:57 +0000 (12:30 -0800)]
Merge tag 'usb-6.1-rc7' of git://git./linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here are some small USB fixes for 6.1-rc7 that resolve some reported
  problems:

   - cdnsp driver fixes for reported problems

   - dwc3 fixes for some small reported problems

   - uvc gadget driver fix for reported regression

  All of these have been in linux-next with no reported problems"

* tag 'usb-6.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  usb: cdnsp: fix issue with ZLP - added TD_SIZE = 1
  usb: dwc3: gadget: Clear ep descriptor last
  usb: dwc3: exynos: Fix remove() function
  usb: cdnsp: Fix issue with Clear Feature Halt Endpoint
  usb: dwc3: gadget: Disable GUSB2PHYCFG.SUSPHY for End Transfer
  usb: gadget: uvc: also use try_format in set_format

23 months agoMerge tag 'char-misc-6.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Sun, 27 Nov 2022 20:17:10 +0000 (12:17 -0800)]
Merge tag 'char-misc-6.1-rc7' of git://git./linux/kernel/git/gregkh/char-misc

Pull char/misc driver fixes from Greg KH:
 "Here are some small driver fixes for 6.1-rc7, they include:

   - build warning fix for the vdso when using new versions of grep

   - iio driver fixes for reported issues

   - small nvmem driver fixes

   - fpga Kconfig fix

   - interconnect dt binding fix

  All of these have been in linux-next with no reported issues"

* tag 'char-misc-6.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
  lib/vdso: use "grep -E" instead of "egrep"
  nvmem: lan9662-otp: Change return type of lan9662_otp_wait_flag_clear()
  nvmem: rmem: Fix return value check in rmem_read()
  fpga: m10bmc-sec: Fix kconfig dependencies
  dt-bindings: iio: adc: Remove the property "aspeed,trim-data-valid"
  iio: adc: aspeed: Remove the trim valid dts property.
  iio: core: Fix entry not deleted when iio_register_sw_trigger_type() fails
  iio: accel: bma400: Fix memory leak in bma400_get_steps_reg()
  iio: light: rpr0521: add missing Kconfig dependencies
  iio: health: afe4404: Fix oob read in afe4404_[read|write]_raw
  iio: health: afe4403: Fix oob read in afe4403_read_raw
  iio: light: apds9960: fix wrong register for gesture gain
  dt-bindings: interconnect: qcom,msm8998-bwmon: Correct SC7280 CPU compatible

23 months agoMerge tag 'timers_urgent_for_v6.1_rc7' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 27 Nov 2022 20:11:00 +0000 (12:11 -0800)]
Merge tag 'timers_urgent_for_v6.1_rc7' of git://git./linux/kernel/git/tip/tip

Pull timer fix from Borislav Petkov:

 - Return the proper timer register width (31 bits) for a 32-bit signed
   register in order to avoid a timer interrupt storm on ARM XGene-1
   hardware running in NO_HZ mode

* tag 'timers_urgent_for_v6.1_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  clocksource/drivers/arm_arch_timer: Fix XGene-1 TVAL register math error

23 months agoMerge tag 'objtool_urgent_for_v6.1_rc7' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 27 Nov 2022 20:08:17 +0000 (12:08 -0800)]
Merge tag 'objtool_urgent_for_v6.1_rc7' of git://git./linux/kernel/git/tip/tip

Pull objtool fix from Borislav Petkov:

 - Handle different output of readelf on different distros running
   ppc64le which confuses faddr2line's function offsets conversion

* tag 'objtool_urgent_for_v6.1_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  scripts/faddr2line: Fix regression in name resolution on ppc64le

23 months agoMerge tag 'x86_urgent_for_v6.1_rc7' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 27 Nov 2022 19:59:14 +0000 (11:59 -0800)]
Merge tag 'x86_urgent_for_v6.1_rc7' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Borislav Petkov:

 - ioremap: mask out the bits which are not part of the physical address
   *after* the size computation is done to prevent any hypothetical
   ioremap failures

 - Change the MSR save/restore functionality during suspend to rely on
   flags denoting that the related MSRs are actually supported vs
   reading them and assuming they are (an Atom one allows reading but
   not writing, thus breaking this scheme at resume time)

 - prevent IV reuse in the AES-GCM communication scheme between SNP
   guests and the AMD secure processor

* tag 'x86_urgent_for_v6.1_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/ioremap: Fix page aligned size calculation in __ioremap_caller()
  x86/pm: Add enumeration check before spec MSRs save/restore setup
  x86/tsx: Add a feature bit for TSX control MSR support
  virt/sev-guest: Prevent IV reuse in the SNP guest driver

23 months agoMerge tag 'perf_urgent_for_v6.1_rc7' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 27 Nov 2022 19:53:41 +0000 (11:53 -0800)]
Merge tag 'perf_urgent_for_v6.1_rc7' of git://git./linux/kernel/git/tip/tip

Pull perf fixes from Borislav Petkov:
 "Two more fixes to the perf sigtrap handling:

   - output the address in the sample only when it has been requested

   - handle the case where user-only events can hit in kernel and thus
     upset the sigtrap sanity checking"

* tag 'perf_urgent_for_v6.1_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf: Consider OS filter fail
  perf: Fixup SIGTRAP and sample_flags interaction

23 months agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Sun, 27 Nov 2022 17:08:40 +0000 (09:08 -0800)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull kvm fixes from Paolo Bonzini:
 "x86:

   - Fixes for Xen emulation. While nobody should be enabling it in the
     kernel (the only public users of the feature are the selftests),
     the bug effectively allows userspace to read arbitrary memory.

   - Correctness fixes for nested hypervisors that do not intercept INIT
     or SHUTDOWN on AMD; the subsequent CPU reset can cause a
     use-after-free when it disables virtualization extensions. While
     downgrading the panic to a WARN is quite easy, the full fix is a
     bit more laborious; there are also tests. This is the bulk of the
     pull request.

   - Fix race condition due to incorrect mmu_lock use around
     make_mmu_pages_available().

  Generic:

   - Obey changes to the kvm.halt_poll_ns module parameter in VMs not
     using KVM_CAP_HALT_POLL, restoring behavior from before the
     introduction of the capability"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: Update gfn_to_pfn_cache khva when it moves within the same page
  KVM: x86/xen: Only do in-kernel acceleration of hypercalls for guest CPL0
  KVM: x86/xen: Validate port number in SCHEDOP_poll
  KVM: x86/mmu: Fix race condition in direct_page_fault
  KVM: x86: remove exit_int_info warning in svm_handle_exit
  KVM: selftests: add svm part to triple_fault_test
  KVM: x86: allow L1 to not intercept triple fault
  kvm: selftests: add svm nested shutdown test
  KVM: selftests: move idt_entry to header
  KVM: x86: forcibly leave nested mode on vCPU reset
  KVM: x86: add kvm_leave_nested
  KVM: x86: nSVM: harden svm_free_nested against freeing vmcb02 while still in use
  KVM: x86: nSVM: leave nested mode on vCPU free
  KVM: Obey kvm.halt_poll_ns in VMs not using KVM_CAP_HALT_POLL
  KVM: Avoid re-reading kvm->max_halt_poll_ns during halt-polling
  KVM: Cap vcpu->halt_poll_ns before halting rather than after

23 months agoMerge tag '6.1-rc6-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Sun, 27 Nov 2022 16:48:26 +0000 (08:48 -0800)]
Merge tag '6.1-rc6-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "Two small cifs/smb3 client fixes:

   - an unlock missing in an error path in copychunk_range found by
     xfstest 476

   - a fix for a use after free in a debug code path"

* tag '6.1-rc6-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: fix missing unlock in cifs_file_copychunk_range()
  cifs: Use after free in debug code

23 months agoMerge tag 'kbuild-fixes-v6.1-4' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 27 Nov 2022 00:38:56 +0000 (16:38 -0800)]
Merge tag 'kbuild-fixes-v6.1-4' of git://git./linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - Fix CC_HAS_ASM_GOTO_TIED_OUTPUT test in Kconfig

 - Fix noisy "No such file or directory" message when
   KBUILD_BUILD_VERSION is passed

 - Include rust/ in source tarballs

 - Fix missing FORCE for ARCH=nios2 builds

* tag 'kbuild-fixes-v6.1-4' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  nios2: add FORCE for vmlinuz.gz
  scripts: add rust in scripts/Makefile.package
  kbuild: fix "cat: .version: No such file or directory"
  init/Kconfig: fix CC_HAS_ASM_GOTO_TIED_OUTPUT test with dash

23 months agonios2: add FORCE for vmlinuz.gz
Randy Dunlap [Thu, 24 Nov 2022 03:20:53 +0000 (19:20 -0800)]
nios2: add FORCE for vmlinuz.gz

Add FORCE to placate a warning from make:

arch/nios2/boot/Makefile:24: FORCE prerequisite is missing

Fixes: 2fc8483fdcde ("nios2: Build infrastructure")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Masahiro Yamada <masahiroy@kernel.org>
23 months agoMerge tag 'nfsd-6.1-6' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux
Linus Torvalds [Sat, 26 Nov 2022 20:25:49 +0000 (12:25 -0800)]
Merge tag 'nfsd-6.1-6' of git://git./linux/kernel/git/cel/linux

Pull nfsd fix from Chuck Lever:

 - Fix rare data corruption on READ operations

* tag 'nfsd-6.1-6' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
  NFSD: Fix reads with a non-zero offset that don't end on a page boundary

23 months agoMerge tag 'for-v6.1-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux...
Linus Torvalds [Sat, 26 Nov 2022 02:02:49 +0000 (18:02 -0800)]
Merge tag 'for-v6.1-rc' of git://git./linux/kernel/git/sre/linux-power-supply

Pull power supply fixes from Sebastian Reichel:

 - rk817: Two error handling fixes

 - ip5xxx: fix inter overflow in current calculation

 - ab8500: fix thermal zone probing

* tag 'for-v6.1-rc' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply:
  power: supply: ab8500: Defer thermal zone probe
  power: supply: ip5xxx: Fix integer overflow in current_now calculation
  power: supply: rk817: Change rk817_chg_cur_to_reg to int
  power: supply: rk817: check correct variable

23 months agoMerge tag 'block-6.1-2022-11-25' of git://git.kernel.dk/linux
Linus Torvalds [Sat, 26 Nov 2022 01:50:57 +0000 (17:50 -0800)]
Merge tag 'block-6.1-2022-11-25' of git://git.kernel.dk/linux

Pull block fixes from Jens Axboe:

 - A few fixes for s390 sads (Stefan, Colin)

 - Ensure that ublk doesn't reorder requests, as that can be problematic
   on devices that need specific ordering (Ming)

 - Fix a queue reference leak in disk allocation handling (Christoph)

* tag 'block-6.1-2022-11-25' of git://git.kernel.dk/linux:
  ublk_drv: don't forward io commands in reserve order
  s390/dasd: fix possible buffer overflow in copy_pair_show
  s390/dasd: fix no record found for raw_track_access
  s390/dasd: increase printing of debug data payload
  s390/dasd: Fix spelling mistake "Ivalid" -> "Invalid"
  blk-mq: fix queue reference leak on blk_mq_alloc_disk_for_queue failure

23 months agoMerge tag 'io_uring-6.1-2022-11-25' of git://git.kernel.dk/linux
Linus Torvalds [Sat, 26 Nov 2022 01:46:04 +0000 (17:46 -0800)]
Merge tag 'io_uring-6.1-2022-11-25' of git://git.kernel.dk/linux

Pull io_uring fixes from Jens Axboe:

 - A few poll related fixes. One fixing a race condition between poll
   cancelation and trigger, and one making the overflow handling a bit
   more robust (Lin, Pavel)

 - Fix an fput() for error handling in the direct file table (Lin)

 - Fix for a regression introduced in this cycle, where we don't always
   get TIF_NOTIFY_SIGNAL cleared appropriately (me)

* tag 'io_uring-6.1-2022-11-25' of git://git.kernel.dk/linux:
  io_uring: clear TIF_NOTIFY_SIGNAL if set and task_work not available
  io_uring/poll: fix poll_refs race with cancelation
  io_uring/filetable: fix file reference underflow
  io_uring: make poll refs more robust
  io_uring: cmpxchg for poll arm refs release

23 months agoMerge tag 'zonefs-6.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal...
Linus Torvalds [Sat, 26 Nov 2022 00:34:39 +0000 (16:34 -0800)]
Merge tag 'zonefs-6.1-rc7' of git://git./linux/kernel/git/dlemoal/zonefs

Pull zonefs fixes from Damien Le Moal:

 - Fix a race between zonefs module initialization of sysfs attribute
   directory and mounting a drive (from Xiaoxu).

 - Fix active zone accounting in the rare case of an IO error due to a
   zone transition to offline or read-only state (from me).

* tag 'zonefs-6.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs:
  zonefs: Fix active zone accounting
  zonefs: Fix race between modprobe and mount

23 months agoMerge tag 'regulator-fix-v6.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 25 Nov 2022 21:54:48 +0000 (13:54 -0800)]
Merge tag 'regulator-fix-v6.1-rc6' of git://git./linux/kernel/git/broonie/regulator

Pull regulator fixes from Mark Brown:
 "This is more changes than I'd like this late although the diffstat is
  still fairly small, I kept on holding off as new fixes came in to give
  things time to soak in -next but should probably have tagged and sent
  an additional pull request earlier.

  There's some relatively large fixes to the twl6030 driver to fix
  issues with the TWL6032 variant which resulted from some work on the
  core TWL6030 driver, a couple of fixes for error handling paths
  (mostly in the core), and a nice stability fix for the sgl51000 driver
  that's been pulled out of a BSP"

* tag 'regulator-fix-v6.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: twl6030: fix get status of twl6032 regulators
  regulator: twl6030: re-add TWL6032_SUBCLASS
  regulator: slg51000: Wait after asserting CS pin
  regulator: core: fix UAF in destroy_regulator()
  regulator: rt5759: fix OOB in validate_desc()
  regulator: core: fix kobject release warning and memory leak in regulator_register()

23 months agoMerge tag 'for-6.1-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
Linus Torvalds [Fri, 25 Nov 2022 21:24:05 +0000 (13:24 -0800)]
Merge tag 'for-6.1-rc6-tag' of git://git./linux/kernel/git/kdave/linux

Pull btrfs fixes from David Sterba:

 - fix a regression in nowait + buffered write

 - in zoned mode fix endianness when comparing super block generation

 - locking and lockdep fixes:
     - fix potential sleeping under spinlock when setting qgroup limit
     - lockdep warning fixes when btrfs_path is freed after copy_to_user
     - do not modify log tree while holding a leaf from fs tree locked

 - fix freeing of sysfs files of static features on error

 - use kv.alloc for zone map allocation as a fallback to avoid warnings
   due to high order allocation

 - send, avoid unaligned encoded writes when attempting to clone range

* tag 'for-6.1-rc6-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: sysfs: normalize the error handling branch in btrfs_init_sysfs()
  btrfs: do not modify log tree while holding a leaf from fs tree locked
  btrfs: use kvcalloc in btrfs_get_dev_zone_info
  btrfs: qgroup: fix sleep from invalid context bug in btrfs_qgroup_inherit()
  btrfs: send: avoid unaligned encoded writes when attempting to clone range
  btrfs: zoned: fix missing endianness conversion in sb_write_pointer
  btrfs: free btrfs_path before copying subvol info to userspace
  btrfs: free btrfs_path before copying fspath to userspace
  btrfs: free btrfs_path before copying inodes to userspace
  btrfs: free btrfs_path before copying root refs to userspace
  btrfs: fix assertion failure and blocking during nowait buffered write

23 months agoMerge tag 'pm-6.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Linus Torvalds [Fri, 25 Nov 2022 20:43:33 +0000 (12:43 -0800)]
Merge tag 'pm-6.1-rc7' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "These revert a recent change in the schedutil cpufreq governor that
  had not been expected to make any functional difference, but turned
  out to introduce a performance regression, fix an initialization issue
  in the amd-pstate driver and make it actually replace the venerable
  ACPI cpufreq driver on the supported systems by default.

  Specifics:

   - Revert a recent schedutil cpufreq governor change that introduced a
     performace regression on Pixel 6 (Sam Wu)

   - Fix amd-pstate driver initialization after running the kernel via
     kexec (Wyes Karny)

   - Turn amd-pstate into a built-in driver which allows it to take
     precedence over acpi-cpufreq by default on supported systems and
     amend it with a mechanism to disable this behavior (Perry Yuan)

   - Update amd-pstate documentation in accordance with the other
     changes made to it (Perry Yuan)"

* tag 'pm-6.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  Documentation: add amd-pstate kernel command line options
  Documentation: amd-pstate: add driver working mode introduction
  cpufreq: amd-pstate: add amd-pstate driver parameter for mode selection
  cpufreq: amd-pstate: change amd-pstate driver to be built-in type
  cpufreq: amd-pstate: cpufreq: amd-pstate: reset MSR_AMD_PERF_CTL register at init
  Revert "cpufreq: schedutil: Move max CPU capacity to sugov_policy"

23 months agoMerge tag 's390-6.1-6' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Fri, 25 Nov 2022 20:37:24 +0000 (12:37 -0800)]
Merge tag 's390-6.1-6' of git://git./linux/kernel/git/s390/linux

Pull s390 updates from Alexander Gordeev:

 - Fix size of incorrectly increased from four to eight bytes TOD field
   of crash dump save area. As result in case of kdump NT_S390_TODPREG
   ELF notes section contains correct value and "detected read beyond
   size of field" compiler warning goes away.

 - Fix memory leak in cryptographic Adjunct Processors (AP) module on
   initialization failure path.

 - Add Gerald Schaefer <gerald.schaefer@linux.ibm.com> and Alexander
   Gordeev <agordeev@linux.ibm.com> as S390 memory management
   maintainers. Also rename the S390 section to S390 ARCHITECTURE to be
   a bit more precise.

* tag 's390-6.1-6' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  MAINTAINERS: add S390 MM section
  s390/crashdump: fix TOD programmable field size
  s390/ap: fix memory leak in ap_init_qci_info()

23 months agoMerge tag 'hyperv-fixes-signed-20221125' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Fri, 25 Nov 2022 20:32:42 +0000 (12:32 -0800)]
Merge tag 'hyperv-fixes-signed-20221125' of git://git./linux/kernel/git/hyperv/linux

Pull hyperv fixes from Wei Liu:

 - Fix IRTE allocation in Hyper-V PCI controller (Dexuan Cui)

 - Fix handling of SCSI srb_status and capacity change events (Michael
   Kelley)

 - Restore VP assist page after CPU offlining and onlining (Vitaly
   Kuznetsov)

 - Fix some memory leak issues in VMBus (Yang Yingliang)

* tag 'hyperv-fixes-signed-20221125' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
  Drivers: hv: vmbus: fix possible memory leak in vmbus_device_register()
  Drivers: hv: vmbus: fix double free in the error path of vmbus_add_channel_work()
  PCI: hv: Only reuse existing IRTE allocation for Multi-MSI
  scsi: storvsc: Fix handling of srb_status and capacity change events
  x86/hyperv: Restore VP assist page after cpu offlining/onlining

23 months agoMerge tag 'mm-hotfixes-stable-2022-11-24' of git://git.kernel.org/pub/scm/linux/kerne...
Linus Torvalds [Fri, 25 Nov 2022 18:18:25 +0000 (10:18 -0800)]
Merge tag 'mm-hotfixes-stable-2022-11-24' of git://git./linux/kernel/git/akpm/mm

Pull hotfixes from Andrew Morton:
 "24 MM and non-MM hotfixes. 8 marked cc:stable and 16 for post-6.0
  issues.

  There have been a lot of hotfixes this cycle, and this is quite a
  large batch given how far we are into the -rc cycle. Presumably a
  reflection of the unusually large amount of MM material which went
  into 6.1-rc1"

* tag 'mm-hotfixes-stable-2022-11-24' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (24 commits)
  test_kprobes: fix implicit declaration error of test_kprobes
  nilfs2: fix nilfs_sufile_mark_dirty() not set segment usage as dirty
  mm/cgroup/reclaim: fix dirty pages throttling on cgroup v1
  mm: fix unexpected changes to {failslab|fail_page_alloc}.attr
  swapfile: fix soft lockup in scan_swap_map_slots
  hugetlb: fix __prep_compound_gigantic_page page flag setting
  kfence: fix stack trace pruning
  proc/meminfo: fix spacing in SecPageTables
  mm: multi-gen LRU: retry folios written back while isolated
  mailmap: update email address for Satya Priya
  mm/migrate_device: return number of migrating pages in args->cpages
  kbuild: fix -Wimplicit-function-declaration in license_is_gpl_compatible
  MAINTAINERS: update Alex Hung's email address
  mailmap: update Alex Hung's email address
  mm: mmap: fix documentation for vma_mas_szero
  mm/damon/sysfs-schemes: skip stats update if the scheme directory is removed
  mm/memory: return vm_fault_t result from migrate_to_ram() callback
  mm: correctly charge compressed memory to its memcg
  ipc/shm: call underlying open/close vm_ops
  gcov: clang: fix the buffer overflow issue
  ...

23 months agoMerge tag 'pull-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Linus Torvalds [Fri, 25 Nov 2022 18:12:43 +0000 (10:12 -0800)]
Merge tag 'pull-fixes' of git://git./linux/kernel/git/viro/vfs

Pull vfs fixes from Al Viro:
 "A couple of fixes, one of them for this cycle regression..."

* tag 'pull-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  vfs: vfs_tmpfile: ensure O_EXCL flag is enforced
  fs: use acquire ordering in __fget_light()

23 months agoio_uring: clear TIF_NOTIFY_SIGNAL if set and task_work not available
Jens Axboe [Fri, 25 Nov 2022 16:36:29 +0000 (09:36 -0700)]
io_uring: clear TIF_NOTIFY_SIGNAL if set and task_work not available

With how task_work is added and signaled, we can have TIF_NOTIFY_SIGNAL
set and no task_work pending as it got run in a previous loop. Treat
TIF_NOTIFY_SIGNAL like get_signal(), always clear it if set regardless
of whether or not task_work is pending to run.

Cc: stable@vger.kernel.org
Fixes: 46a525e199e4 ("io_uring: don't gate task_work run on TIF_NOTIFY_SIGNAL")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
23 months agoMerge tag 'sound-6.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Fri, 25 Nov 2022 17:26:18 +0000 (09:26 -0800)]
Merge tag 'sound-6.1-rc7' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "A few more last-minute fixes for 6.1 that have been gathered in the
  last week; nothing looks too worrisome, mostly device-specific small
  fixes, including the ABI fix for ASoC SOF"

* tag 'sound-6.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ASoC: soc-pcm: Add NULL check in BE reparenting
  ALSA: seq: Fix function prototype mismatch in snd_seq_expand_var_event
  ASoC: SOF: dai: move AMD_HS to end of list to restore backwards-compatibility
  ASoC: max98373: Add checks for devm_kcalloc
  ASoC: rt711-sdca: fix the latency time of clock stop prepare state machine transitions
  ASoC: soc-pcm: Don't zero TDM masks in __soc_pcm_open()
  ASoC: sgtl5000: Reset the CHIP_CLK_CTRL reg on remove
  ASoC: hdac_hda: fix hda pcm buffer overflow issue
  ASoC: stm32: i2s: remove irqf_oneshot flag
  ASoC: wm8962: Wait for updated value of WM8962_CLOCKING1 register

23 months agoMerge tag 'drm-fixes-2022-11-25' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 25 Nov 2022 17:20:42 +0000 (09:20 -0800)]
Merge tag 'drm-fixes-2022-11-25' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Weekly fixes, amdgpu has not quite settled down.

  Most of the changes are small, and the non-amdgpu ones are all fine.
  There are a bunch of DP MST DSC fixes that fix some issues introduced
  in a previous larger MST rework.

  The biggest one is mainly propagating some error values properly
  instead of bool returns, and I think it just looks large but doesn't
  really change anything too much, except propagating errors that are
  required to avoid deadlocks. I've gone over it and a few others and
  they've had some decent testing over the last few weeks.

  Summary:

  amdgpu:
   - amdgpu gang submit fix
   - DCN 3.1.4 fixes
   - DP MST DSC deadlock fixes
   - HMM userptr fixes
   - Fix Aldebaran CU occupancy reporting
   - GFX11 fixes
   - PSP suspend/resume fix
   - DCE12 KASAN fix
   - DCN 3.2.x fixes
   - Rotated cursor fix
   - SMU 13.x fix
   - DELL platform suspend/resume fixes
   - VCN4 SR-IOV fix
   - Display regression fix for polled connectors

  i915:
   - Fix GVT KVM reference count handling
   - Never purge busy TTM objects
   - Fix warn in intel_display_power_*_domain() functions

  dma-buf:
   - Use dma_fence_unwrap_for_each when importing sync files
   - Fix race in dma_heap_add()

  fbcon:
   - Fix use of uninitialized memory in logo"

* tag 'drm-fixes-2022-11-25' of git://anongit.freedesktop.org/drm/drm: (30 commits)
  drm/amdgpu/vcn: re-use original vcn0 doorbell value
  drm/amdgpu: Partially revert "drm/amdgpu: update drm_display_info correctly when the edid is read"
  drm/amd/display: No display after resume from WB/CB
  drm/amdgpu: fix use-after-free during gpu recovery
  drm/amd/pm: update driver if header for smu_13_0_7
  drm/amd/display: Fix rotated cursor offset calculation
  drm/amd/display: Use new num clk levels struct for max mclk index
  drm/amd/display: Avoid setting pixel rate divider to N/A
  drm/amd/display: Use viewport height for subvp mall allocation size
  drm/amd/display: Update soc bounding box for dcn32/dcn321
  drm/amd/dc/dce120: Fix audio register mapping, stop triggering KASAN
  drm/amdgpu/psp: don't free PSP buffers on suspend
  fbcon: Use kzalloc() in fbcon_prepare_logo()
  dma-buf: fix racing conflict of dma_heap_add()
  drm/amd/amdgpu: reserve vm invalidation engine for firmware
  drm/amdgpu: Enable Aldebaran devices to report CU Occupancy
  drm/amdgpu: fix userptr HMM range handling v2
  drm/amdgpu: always register an MMU notifier for userptr
  drm/amdgpu/dm/mst: Fix uninitialized var in pre_compute_mst_dsc_configs_for_state()
  drm/amdgpu/dm/dp_mst: Don't grab mst_mgr->lock when computing DSC state
  ...

23 months agoio_uring/poll: fix poll_refs race with cancelation
Lin Ma [Fri, 25 Nov 2022 14:15:54 +0000 (07:15 -0700)]
io_uring/poll: fix poll_refs race with cancelation

There is an interesting race condition of poll_refs which could result
in a NULL pointer dereference. The crash trace is like:

KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 PID: 30781 Comm: syz-executor.2 Not tainted 6.0.0-g493ffd6605b2 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.13.0-1ubuntu1.1 04/01/2014
RIP: 0010:io_poll_remove_entry io_uring/poll.c:154 [inline]
RIP: 0010:io_poll_remove_entries+0x171/0x5b4 io_uring/poll.c:190
Code: ...
RSP: 0018:ffff88810dfefba0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc900030c4000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: 0000000000000008 R08: ffffffff9764d3dd R09: fffffbfff3836781
R10: fffffbfff3836781 R11: 0000000000000000 R12: 1ffff11003422d60
R13: ffff88801a116b04 R14: ffff88801a116ac0 R15: dffffc0000000000
FS:  00007f9c07497700(0000) GS:ffff88811a600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffb5c00ea98 CR3: 0000000105680005 CR4: 0000000000770ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:
 <TASK>
 io_apoll_task_func+0x3f/0xa0 io_uring/poll.c:299
 handle_tw_list io_uring/io_uring.c:1037 [inline]
 tctx_task_work+0x37e/0x4f0 io_uring/io_uring.c:1090
 task_work_run+0x13a/0x1b0 kernel/task_work.c:177
 get_signal+0x2402/0x25a0 kernel/signal.c:2635
 arch_do_signal_or_restart+0x3b/0x660 arch/x86/kernel/signal.c:869
 exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
 exit_to_user_mode_prepare+0xc2/0x160 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x58/0x160 kernel/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The root cause for this is a tiny overlooking in
io_poll_check_events() when cocurrently run with poll cancel routine
io_poll_cancel_req().

The interleaving to trigger use-after-free:

CPU0                                       |  CPU1
                                           |
io_apoll_task_func()                       |  io_poll_cancel_req()
 io_poll_check_events()                    |
  // do while first loop                   |
  v = atomic_read(...)                     |
  // v = poll_refs = 1                     |
  ...                                      |  io_poll_mark_cancelled()
                                           |   atomic_or()
                                           |   // poll_refs =
IO_POLL_CANCEL_FLAG | 1
                                           |
  atomic_sub_return(...)                   |
  // poll_refs = IO_POLL_CANCEL_FLAG       |
  // loop continue                         |
                                           |
                                           |  io_poll_execute()
                                           |   io_poll_get_ownership()
                                           |   // poll_refs =
IO_POLL_CANCEL_FLAG | 1
                                           |   // gets the ownership
  v = atomic_read(...)                     |
  // poll_refs not change                  |
                                           |
  if (v & IO_POLL_CANCEL_FLAG)             |
   return -ECANCELED;                      |
  // io_poll_check_events return           |
  // will go into                          |
  // io_req_complete_failed() free req     |
                                           |
                                           |  io_apoll_task_func()
                                           |  // also go into
io_req_complete_failed()

And the interleaving to trigger the kernel WARNING:

CPU0                                       |  CPU1
                                           |
io_apoll_task_func()                       |  io_poll_cancel_req()
 io_poll_check_events()                    |
  // do while first loop                   |
  v = atomic_read(...)                     |
  // v = poll_refs = 1                     |
  ...                                      |  io_poll_mark_cancelled()
                                           |   atomic_or()
                                           |   // poll_refs =
IO_POLL_CANCEL_FLAG | 1
                                           |
  atomic_sub_return(...)                   |
  // poll_refs = IO_POLL_CANCEL_FLAG       |
  // loop continue                         |
                                           |
  v = atomic_read(...)                     |
  // v = IO_POLL_CANCEL_FLAG               |
                                           |  io_poll_execute()
                                           |   io_poll_get_ownership()
                                           |   // poll_refs =
IO_POLL_CANCEL_FLAG | 1
                                           |   // gets the ownership
                                           |
  WARN_ON_ONCE(!(v & IO_POLL_REF_MASK)))   |
  // v & IO_POLL_REF_MASK = 0 WARN         |
                                           |
                                           |  io_apoll_task_func()
                                           |  // also go into
io_req_complete_failed()

By looking up the source code and communicating with Pavel, the
implementation of this atomic poll refs should continue the loop of
io_poll_check_events() just to avoid somewhere else to grab the
ownership. Therefore, this patch simply adds another AND operation to
make sure the loop will stop if it finds the poll_refs is exactly equal
to IO_POLL_CANCEL_FLAG. Since io_poll_cancel_req() grabs ownership and
will finally make its way to io_req_complete_failed(), the req will
be reclaimed as expected.

Fixes: aa43477b0402 ("io_uring: poll rework")
Signed-off-by: Lin Ma <linma@zju.edu.cn>
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
[axboe: tweak description and code style]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
23 months agoio_uring/filetable: fix file reference underflow
Lin Ma [Tue, 22 Nov 2022 18:40:15 +0000 (02:40 +0800)]
io_uring/filetable: fix file reference underflow

There is an interesting reference bug when -ENOMEM occurs in calling of
io_install_fixed_file(). KASan report like below:

[   14.057131] ==================================================================
[   14.059161] BUG: KASAN: use-after-free in unix_get_socket+0x10/0x90
[   14.060975] Read of size 8 at addr ffff88800b09cf20 by task kworker/u8:2/45
[   14.062684]
[   14.062768] CPU: 2 PID: 45 Comm: kworker/u8:2 Not tainted 6.1.0-rc4 #1
[   14.063099] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014
[   14.063666] Workqueue: events_unbound io_ring_exit_work
[   14.063936] Call Trace:
[   14.064065]  <TASK>
[   14.064175]  dump_stack_lvl+0x34/0x48
[   14.064360]  print_report+0x172/0x475
[   14.064547]  ? _raw_spin_lock_irq+0x83/0xe0
[   14.064758]  ? __virt_addr_valid+0xef/0x170
[   14.064975]  ? unix_get_socket+0x10/0x90
[   14.065167]  kasan_report+0xad/0x130
[   14.065353]  ? unix_get_socket+0x10/0x90
[   14.065553]  unix_get_socket+0x10/0x90
[   14.065744]  __io_sqe_files_unregister+0x87/0x1e0
[   14.065989]  ? io_rsrc_refs_drop+0x1c/0xd0
[   14.066199]  io_ring_exit_work+0x388/0x6a5
[   14.066410]  ? io_uring_try_cancel_requests+0x5bf/0x5bf
[   14.066674]  ? try_to_wake_up+0xdb/0x910
[   14.066873]  ? virt_to_head_page+0xbe/0xbe
[   14.067080]  ? __schedule+0x574/0xd20
[   14.067273]  ? read_word_at_a_time+0xe/0x20
[   14.067492]  ? strscpy+0xb5/0x190
[   14.067665]  process_one_work+0x423/0x710
[   14.067879]  worker_thread+0x2a2/0x6f0
[   14.068073]  ? process_one_work+0x710/0x710
[   14.068284]  kthread+0x163/0x1a0
[   14.068454]  ? kthread_complete_and_exit+0x20/0x20
[   14.068697]  ret_from_fork+0x22/0x30
[   14.068886]  </TASK>
[   14.069000]
[   14.069088] Allocated by task 289:
[   14.069269]  kasan_save_stack+0x1e/0x40
[   14.069463]  kasan_set_track+0x21/0x30
[   14.069652]  __kasan_slab_alloc+0x58/0x70
[   14.069899]  kmem_cache_alloc+0xc5/0x200
[   14.070100]  __alloc_file+0x20/0x160
[   14.070283]  alloc_empty_file+0x3b/0xc0
[   14.070479]  path_openat+0xc3/0x1770
[   14.070689]  do_filp_open+0x150/0x270
[   14.070888]  do_sys_openat2+0x113/0x270
[   14.071081]  __x64_sys_openat+0xc8/0x140
[   14.071283]  do_syscall_64+0x3b/0x90
[   14.071466]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
[   14.071791]
[   14.071874] Freed by task 0:
[   14.072027]  kasan_save_stack+0x1e/0x40
[   14.072224]  kasan_set_track+0x21/0x30
[   14.072415]  kasan_save_free_info+0x2a/0x50
[   14.072627]  __kasan_slab_free+0x106/0x190
[   14.072858]  kmem_cache_free+0x98/0x340
[   14.073075]  rcu_core+0x427/0xe50
[   14.073249]  __do_softirq+0x110/0x3cd
[   14.073440]
[   14.073523] Last potentially related work creation:
[   14.073801]  kasan_save_stack+0x1e/0x40
[   14.074017]  __kasan_record_aux_stack+0x97/0xb0
[   14.074264]  call_rcu+0x41/0x550
[   14.074436]  task_work_run+0xf4/0x170
[   14.074619]  exit_to_user_mode_prepare+0x113/0x120
[   14.074858]  syscall_exit_to_user_mode+0x1d/0x40
[   14.075092]  do_syscall_64+0x48/0x90
[   14.075272]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
[   14.075529]
[   14.075612] Second to last potentially related work creation:
[   14.075900]  kasan_save_stack+0x1e/0x40
[   14.076098]  __kasan_record_aux_stack+0x97/0xb0
[   14.076325]  task_work_add+0x72/0x1b0
[   14.076512]  fput+0x65/0xc0
[   14.076657]  filp_close+0x8e/0xa0
[   14.076825]  __x64_sys_close+0x15/0x50
[   14.077019]  do_syscall_64+0x3b/0x90
[   14.077199]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
[   14.077448]
[   14.077530] The buggy address belongs to the object at ffff88800b09cf00
[   14.077530]  which belongs to the cache filp of size 232
[   14.078105] The buggy address is located 32 bytes inside of
[   14.078105]  232-byte region [ffff88800b09cf00ffff88800b09cfe8)
[   14.078685]
[   14.078771] The buggy address belongs to the physical page:
[   14.079046] page:000000001bd520e7 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b09de00 pfn:0xb09c
[   14.079575] head:000000001bd520e7 order:1 compound_mapcount:0 compound_pincount:0
[   14.079946] flags: 0x100000000010200(slab|head|node=0|zone=1)
[   14.080244] raw: 0100000000010200 0000000000000000 dead000000000001 ffff88800493cc80
[   14.080629] raw: ffff88800b09de00 0000000080190018 00000001ffffffff 0000000000000000
[   14.081016] page dumped because: kasan: bad access detected
[   14.081293]
[   14.081376] Memory state around the buggy address:
[   14.081618]  ffff88800b09ce00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[   14.081974]  ffff88800b09ce80: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
[   14.082336] >ffff88800b09cf00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[   14.082690]                                ^
[   14.082909]  ffff88800b09cf80: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc
[   14.083266]  ffff88800b09d000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
[   14.083622] ==================================================================

The actual tracing of this bug is shown below:

commit 8c71fe750215 ("io_uring: ensure fput() called correspondingly
when direct install fails") adds an additional fput() in
io_fixed_fd_install() when io_file_bitmap_get() returns error values. In
that case, the routine will never make it to io_install_fixed_file() due
to an early return.

static int io_fixed_fd_install(...)
{
  if (alloc_slot) {
    ...
    ret = io_file_bitmap_get(ctx);
    if (unlikely(ret < 0)) {
      io_ring_submit_unlock(ctx, issue_flags);
      fput(file);
      return ret;
    }
    ...
  }
  ...
  ret = io_install_fixed_file(req, file, issue_flags, file_slot);
  ...
}

In the above scenario, the reference is okay as io_fixed_fd_install()
ensures the fput() is called when something bad happens, either via
bitmap or via inner io_install_fixed_file().

However, the commit 61c1b44a21d7 ("io_uring: fix deadlock on iowq file
slot alloc") breaks the balance because it places fput() into the common
path for both io_file_bitmap_get() and io_install_fixed_file(). Since
io_install_fixed_file() handles the fput() itself, the reference
underflow come across then.

There are some extra commits make the current code into
io_fixed_fd_install() -> __io_fixed_fd_install() ->
io_install_fixed_file()

However, the fact that there is an extra fput() is called if
io_install_fixed_file() calls fput(). Traversing through the code, I
find that the existing two callers to __io_fixed_fd_install():
io_fixed_fd_install() and io_msg_send_fd() have fput() when handling
error return, this patch simply removes the fput() in
io_install_fixed_file() to fix the bug.

Fixes: 61c1b44a21d7 ("io_uring: fix deadlock on iowq file slot alloc")
Signed-off-by: Lin Ma <linma@zju.edu.cn>
Link: https://lore.kernel.org/r/be4ba4b.5d44.184a0a406a4.Coremail.linma@zju.edu.cn
Signed-off-by: Jens Axboe <axboe@kernel.dk>
23 months agoio_uring: make poll refs more robust
Pavel Begunkov [Sun, 20 Nov 2022 16:57:42 +0000 (16:57 +0000)]
io_uring: make poll refs more robust

poll_refs carry two functions, the first is ownership over the request.
The second is notifying the io_poll_check_events() that there was an
event but wake up couldn't grab the ownership, so io_poll_check_events()
should retry.

We want to make poll_refs more robust against overflows. Instead of
always incrementing it, which covers two purposes with one atomic, check
if poll_refs is elevated enough and if so set a retry flag without
attempts to grab ownership. The gap between the bias check and following
atomics may seem racy, but we don't need it to be strict. Moreover there
might only be maximum 4 parallel updates: by the first and the second
poll entries, __io_arm_poll_handler() and cancellation. From those four,
only poll wake ups may be executed multiple times, but they're protected
by a spin.

Cc: stable@vger.kernel.org
Reported-by: Lin Ma <linma@zju.edu.cn>
Fixes: aa43477b04025 ("io_uring: poll rework")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/c762bc31f8683b3270f3587691348a7119ef9c9d.1668963050.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
23 months agoio_uring: cmpxchg for poll arm refs release
Pavel Begunkov [Sun, 20 Nov 2022 16:57:41 +0000 (16:57 +0000)]
io_uring: cmpxchg for poll arm refs release

Replace atomically substracting the ownership reference at the end of
arming a poll with a cmpxchg. We try to release ownership by setting 0
assuming that poll_refs didn't change while we were arming. If it did
change, we keep the ownership and use it to queue a tw, which is fully
capable to process all events and (even tolerates spurious wake ups).

It's a bit more elegant as we reduce races b/w setting the cancellation
flag and getting refs with this release, and with that we don't have to
worry about any kinds of underflows. It's not the fastest path for
polling. The performance difference b/w cmpxchg and atomic dec is
usually negligible and it's not the fastest path.

Cc: stable@vger.kernel.org
Fixes: aa43477b04025 ("io_uring: poll rework")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/0c95251624397ea6def568ff040cad2d7926fd51.1668963050.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
23 months agozonefs: Fix active zone accounting
Damien Le Moal [Mon, 21 Nov 2022 07:29:37 +0000 (16:29 +0900)]
zonefs: Fix active zone accounting

If a file zone transitions to the offline or readonly state from an
active state, we must clear the zone active flag and decrement the
active seq file counter. Do so in zonefs_account_active() using the new
zonefs inode flags ZONEFS_ZONE_OFFLINE and ZONEFS_ZONE_READONLY. These
flags are set if necessary in zonefs_check_zone_condition() based on the
result of report zones operation after an IO error.

Fixes: 87c9ce3ffec9 ("zonefs: Add active seq file accounting")
Cc: stable@vger.kernel.org
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
23 months agovfs: fix copy_file_range() averts filesystem freeze protection
Amir Goldstein [Thu, 17 Nov 2022 20:52:49 +0000 (22:52 +0200)]
vfs: fix copy_file_range() averts filesystem freeze protection

Commit 868f9f2f8e00 ("vfs: fix copy_file_range() regression in cross-fs
copies") removed fallback to generic_copy_file_range() for cross-fs
cases inside vfs_copy_file_range().

To preserve behavior of nfsd and ksmbd server-side-copy, the fallback to
generic_copy_file_range() was added in nfsd and ksmbd code, but that
call is missing sb_start_write(), fsnotify hooks and more.

Ideally, nfsd and ksmbd would pass a flag to vfs_copy_file_range() that
will take care of the fallback, but that code would be subtle and we got
vfs_copy_file_range() logic wrong too many times already.

Instead, add a flag to explicitly request vfs_copy_file_range() to
perform only generic_copy_file_range() and let nfsd and ksmbd use this
flag only in the fallback path.

This choise keeps the logic changes to minimum in the non-nfsd/ksmbd code
paths to reduce the risk of further regressions.

Fixes: 868f9f2f8e00 ("vfs: fix copy_file_range() regression in cross-fs copies")
Tested-by: Namjae Jeon <linkinjeon@kernel.org>
Tested-by: Luis Henriques <lhenriques@suse.de>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
23 months agoMerge tag 'amd-drm-fixes-6.1-2022-11-23' of https://gitlab.freedesktop.org/agd5f...
Dave Airlie [Fri, 25 Nov 2022 00:55:23 +0000 (10:55 +1000)]
Merge tag 'amd-drm-fixes-6.1-2022-11-23' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes

amd-drm-fixes-6.1-2022-11-23:

amdgpu:
- DCN 3.1.4 fixes
- DP MST DSC deadlock fixes
- HMM userptr fixes
- Fix Aldebaran CU occupancy reporting
- GFX11 fixes
- PSP suspend/resume fix
- DCE12 KASAN fix
- DCN 3.2.x fixes
- Rotated cursor fix
- SMU 13.x fix
- DELL platform suspend/resume fixes
- VCN4 SR-IOV fix
- Display regression fix for polled connectors

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221123143453.8977-1-alexander.deucher@amd.com
23 months agoMerge tag 'drm-intel-fixes-2022-11-24' of git://anongit.freedesktop.org/drm/drm-intel...
Dave Airlie [Thu, 24 Nov 2022 23:42:01 +0000 (09:42 +1000)]
Merge tag 'drm-intel-fixes-2022-11-24' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

- Fix GVT KVM reference count handling (Sean Christopherson)
- Never purge busy TTM objects (Matthew Auld)
- Fix warn in intel_display_power_*_domain() functions (Imre Deak)

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/Y38u44hb1LZfZC+M@tursulin-desk
23 months agoMerge tag 'drm-misc-fixes-2022-11-24' of git://anongit.freedesktop.org/drm/drm-misc...
Dave Airlie [Thu, 24 Nov 2022 23:21:10 +0000 (09:21 +1000)]
Merge tag 'drm-misc-fixes-2022-11-24' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

drm-misc-fixes for v6.1-rc7:
- Another amdgpu gang submit fix.
- Use dma_fence_unwrap_for_each when importing sync files.
- Fix race in dma_heap_add().
- Fix use of uninitialized memory in logo.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/a5721505-4823-98ef-7d6f-0ea478221391@linux.intel.com
23 months agoMerge tag 'net-6.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Thu, 24 Nov 2022 19:19:20 +0000 (11:19 -0800)]
Merge tag 'net-6.1-rc7' of git://git./linux/kernel/git/netdev/net

Pull networking fixes from Paolo Abeni:
 "Including fixes from rxrpc, netfilter and xfrm.

  Current release - regressions:

   - dccp/tcp: fix bhash2 issues related to WARN_ON() in
     inet_csk_get_port()

   - l2tp: don't sleep and disable BH under writer-side sk_callback_lock

   - eth: ice: fix handling of burst tx timestamps

  Current release - new code bugs:

   - xfrm: squelch kernel warning in case XFRM encap type is not
     available

   - eth: mlx5e: fix possible race condition in macsec extended packet
     number update routine

  Previous releases - regressions:

   - neigh: decrement the family specific qlen

   - netfilter: fix ipset regression

   - rxrpc: fix race between conn bundle lookup and bundle removal
     [ZDI-CAN-15975]

   - eth: iavf: do not restart tx queues after reset task failure

   - eth: nfp: add port from netdev validation for EEPROM access

   - eth: mtk_eth_soc: fix potential memory leak in mtk_rx_alloc()

  Previous releases - always broken:

   - tipc: set con sock in tipc_conn_alloc

   - nfc:
      - fix potential memory leaks
      - fix incorrect sizing calculations in EVT_TRANSACTION

   - eth: octeontx2-af: fix pci device refcount leak

   - eth: bonding: fix ICMPv6 header handling when receiving IPv6
     messages

   - eth: prestera: add missing unregister_netdev() in
     prestera_port_create()

   - eth: tsnep: fix rotten packets

  Misc:

   - usb: qmi_wwan: add support for LARA-L6"

* tag 'net-6.1-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (95 commits)
  net: thunderx: Fix the ACPI memory leak
  octeontx2-af: Fix reference count issue in rvu_sdp_init()
  net: altera_tse: release phylink resources in tse_shutdown()
  virtio_net: Fix probe failed when modprobe virtio_net
  net: wwan: t7xx: Fix the ACPI memory leak
  octeontx2-pf: Add check for devm_kcalloc
  net: enetc: preserve TX ring priority across reconfiguration
  net: marvell: prestera: add missing unregister_netdev() in prestera_port_create()
  nfc: st-nci: fix incorrect sizing calculations in EVT_TRANSACTION
  nfc: st-nci: fix memory leaks in EVT_TRANSACTION
  nfc: st-nci: fix incorrect validating logic in EVT_TRANSACTION
  Documentation: networking: Update generic_netlink_howto URL
  net/cdc_ncm: Fix multicast RX support for CDC NCM devices with ZLP
  net: usb: qmi_wwan: add u-blox 0x1342 composition
  l2tp: Don't sleep and disable BH under writer-side sk_callback_lock
  net: dm9051: Fix missing dev_kfree_skb() in dm9051_loop_rx()
  arcnet: fix potential memory leak in com20020_probe()
  ipv4: Fix error return code in fib_table_insert()
  net: ethernet: mtk_eth_soc: fix memory leak in error path
  net: ethernet: mtk_eth_soc: fix resource leak in error path
  ...

23 months agoMerge tag 'soc-fixes-6.1-4' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Linus Torvalds [Thu, 24 Nov 2022 19:14:09 +0000 (11:14 -0800)]
Merge tag 'soc-fixes-6.1-4' of git://git./linux/kernel/git/soc/soc

Pull ARM SoC fixes from Arnd Bergmann:
 "There are a bunch of late fixes that just came in, in particular a
  longer series for Rockchips devicetree files, but most of those just
  address cosmetic errors that were found during the binding validation.

  There are a couple of code changes:

   - A regression fix to the IXP42x PCI bus

   - A fix for a memory leak on optee, and another one for mach-mxs

   - Two fixes for the sunxi rsb bus driver, to address problems with
     the shutdown logic

  The rest are small but important devicetree fixes for a number of
  individual boards, addressing issues across all platforms:

   - arm global timer on older rockchip SoCs is unstable and needs to be
     disabled in favor of a more reliable clocksource

   - Corrections to fix bluetooth, mmc, and networking on a few Rockchip
     boards

   - at91/sam9g20ek UDC needs a pin controller config change

   - an omap board runs into mmc probe errors because of regulator nodes
     in the wrong place

   - imx8mp-evk has a minor inaccuracy with its pin config, but without
     user visible impact

   - The Allwinner H6 Hantro G2 video decoder needs an IOMMU reference
     to prevent the driver from crashing"

* tag 'soc-fixes-6.1-4' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (30 commits)
  bus: ixp4xx: Don't touch bit 7 on IXP42x
  ARM: dts: imx6q-prti6q: Fix ref/tcxo-clock-frequency properties
  arm64: dts: imx8mp-evk: correct pcie pad settings
  ARM: mxs: fix memory leak in mxs_machine_init()
  ARM: dts: at91: sam9g20ek: enable udc vbus gpio pinctrl
  tee: optee: fix possible memory leak in optee_register_device()
  arm64: dts: allwinner: h6: Add IOMMU reference to Hantro G2
  media: dt-bindings: allwinner: h6-vpu-g2: Add IOMMU reference property
  bus: sunxi-rsb: Support atomic transfers
  bus: sunxi-rsb: Remove the shutdown callback
  ARM: dts: rockchip: disable arm_global_timer on rk3066 and rk3188
  arm64: dts: rockchip: Fix Pine64 Quartz4-B PMIC interrupt
  ARM: dts: am335x-pcm-953: Define fixed regulators in root node
  ARM: dts: rockchip: rk3188: fix lcdc1-rgb24 node name
  arm64: dts: rockchip: fix ir-receiver node names
  ARM: dts: rockchip: fix ir-receiver node names
  arm64: dts: rockchip: fix adc-keys sub node names
  ARM: dts: rockchip: fix adc-keys sub node names
  arm: dts: rockchip: remove clock-frequency from rtc
  arm: dts: rockchip: fix node name for hym8563 rtc
  ...

23 months agoMerge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
Linus Torvalds [Thu, 24 Nov 2022 19:10:51 +0000 (11:10 -0800)]
Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:
 "Two fixes for 6.1:

   - fix stacktraces for tracepoint events in Thumb2 mode

   - fix for noMMU ZERO_PAGE() implementation"

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 9266/1: mm: fix no-MMU ZERO_PAGE() implementation
  ARM: 9251/1: perf: Fix stacktraces for tracepoint events in THUMB2 kernels

23 months agoMerge tag 'loongarch-fixes-6.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 24 Nov 2022 19:09:01 +0000 (11:09 -0800)]
Merge tag 'loongarch-fixes-6.1-2' of git://git./linux/kernel/git/chenhuacai/linux-loongson

Pull LoongArch fixes from Huacai Chen:
 "Fix two build warnings, a copy_thread() bug, two page table
  manipulation bugs, and some trivial cleanups"

* tag 'loongarch-fixes-6.1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson:
  docs/zh_CN/LoongArch: Fix wrong description of FPRs Note
  LoongArch: Fix unsigned comparison with less than zero
  LoongArch: Set _PAGE_DIRTY only if _PAGE_MODIFIED is set in {pmd,pte}_mkwrite()
  LoongArch: Set _PAGE_DIRTY only if _PAGE_WRITE is set in {pmd,pte}_mkdirty()
  LoongArch: Clear FPU/SIMD thread info flags for kernel thread
  LoongArch: SMP: Change prefix from loongson3 to loongson
  LoongArch: Combine acpi_boot_table_init() and acpi_boot_init()
  LoongArch: Makefile: Use "grep -E" instead of "egrep"

23 months agoMerge tag 'ext4_for_linus_stable2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 24 Nov 2022 18:22:42 +0000 (10:22 -0800)]
Merge tag 'ext4_for_linus_stable2' of git://git./linux/kernel/git/tytso/ext4

Pull ext4 fixes from Ted Ts'o:
 "Fix a regression in the lazytime code that was introduced in v6.1-rc1,
  and a use-after-free that can be triggered by a maliciously corrupted
  file system"

* tag 'ext4_for_linus_stable2' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  fs: do not update freeing inode i_io_list
  ext4: fix use-after-free in ext4_ext_shift_extents

23 months agoMerge tag 'v6.2-rockchip-dts32-1' of git://git.kernel.org/pub/scm/linux/kernel/git...
Arnd Bergmann [Thu, 24 Nov 2022 14:36:13 +0000 (15:36 +0100)]
Merge tag 'v6.2-rockchip-dts32-1' of git://git./linux/kernel/git/mmind/linux-rockchip into arm/fixes

Disabling of the unreliable arm-global-timer on earliest
Rockchip SoCs, due to its frequency being bound to the
changing cpu clock.

* tag 'v6.2-rockchip-dts32-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip:
  ARM: dts: rockchip: disable arm_global_timer on rk3066 and rk3188

23 months agoMAINTAINERS: add S390 MM section
Heiko Carstens [Thu, 17 Nov 2022 19:23:30 +0000 (20:23 +0100)]
MAINTAINERS: add S390 MM section

Alexander Gordeev and Gerald Schaefer are covering the whole s390 specific
memory management code. Reflect that by adding a new S390 MM section to
MAINTAINERS.

Also rename the S390 section to S390 ARCHITECTURE to be a bit more precise.

Acked-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Acked-by: Alexander Gordeev <agordeev@linux.ibm.com>
Acked-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
23 months agos390/crashdump: fix TOD programmable field size
Heiko Carstens [Fri, 18 Nov 2022 12:05:39 +0000 (13:05 +0100)]
s390/crashdump: fix TOD programmable field size

The size of the TOD programmable field was incorrectly increased from
four to eight bytes with commit 1a2c5840acf9 ("s390/dump: cleanup CPU
save area handling").
This leads to an elf notes section NT_S390_TODPREG which has a size of
eight instead of four bytes in case of kdump, however even worse is
that the contents is incorrect: it is supposed to contain only the
contents of the TOD programmable field, but in fact contains a mix of
the TOD programmable field (32 bit upper bits) and parts of the CPU
timer register (lower 32 bits).

Fix this by simply changing the size of the todpreg field within the
save area structure. This will implicitly also fix the size of the
corresponding elf notes sections.

This also gets rid of this compile time warning:

in function ‘fortify_memcpy_chk’,
    inlined from ‘save_area_add_regs’ at arch/s390/kernel/crash_dump.c:99:2:
./include/linux/fortify-string.h:413:25: error: call to ‘__read_overflow2_field’
   declared with attribute warning: detected read beyond size of field
   (2nd parameter); maybe use struct_group()? [-Werror=attribute-warning]
  413 |                         __read_overflow2_field(q_size_field, size);
      |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Fixes: 1a2c5840acf9 ("s390/dump: cleanup CPU save area handling")
Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
23 months agonet: thunderx: Fix the ACPI memory leak
Yu Liao [Wed, 23 Nov 2022 08:22:36 +0000 (16:22 +0800)]
net: thunderx: Fix the ACPI memory leak

The ACPI buffer memory (string.pointer) should be freed as the buffer is
not used after returning from bgx_acpi_match_id(), free it to prevent
memory leak.

Fixes: 46b903a01c05 ("net, thunder, bgx: Add support to get MAC address from ACPI.")
Signed-off-by: Yu Liao <liaoyu15@huawei.com>
Link: https://lore.kernel.org/r/20221123082237.1220521-1-liaoyu15@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
23 months agoperf: Consider OS filter fail
Peter Zijlstra [Sat, 19 Nov 2022 02:45:54 +0000 (10:45 +0800)]
perf: Consider OS filter fail

Some PMUs (notably the traditional hardware kind) have boundary issues
with the OS filter. Specifically, it is possible for
perf_event_attr::exclude_kernel=1 events to trigger in-kernel due to
SKID or errata.

This can upset the sigtrap logic some and trigger the WARN.

However, if this invalid sample is the first we must not loose the
SIGTRAP, OTOH if it is the second, it must not override the
pending_addr with a (possibly) invalid one.

Fixes: ca6c21327c6a ("perf: Fix missing SIGTRAPs")
Reported-by: Pengfei Xu <pengfei.xu@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Marco Elver <elver@google.com>
Tested-by: Pengfei Xu <pengfei.xu@intel.com>
Link: https://lkml.kernel.org/r/Y3hDYiXwRnJr8RYG@xpf.sh.intel.com
23 months agoperf: Fixup SIGTRAP and sample_flags interaction
Peter Zijlstra [Mon, 21 Nov 2022 14:57:44 +0000 (15:57 +0100)]
perf: Fixup SIGTRAP and sample_flags interaction

The perf_event_attr::sigtrap functionality relies on data->addr being
set. However commit 7b0846301531 ("perf: Use sample_flags for addr")
changed this to only initialize data->addr when not 0.

Fixes: 7b0846301531 ("perf: Use sample_flags for addr")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/Y3426b4OimE%2FI5po%40hirez.programming.kicks-ass.net
23 months agoocteontx2-af: Fix reference count issue in rvu_sdp_init()
Xiongfeng Wang [Wed, 23 Nov 2022 06:59:19 +0000 (14:59 +0800)]
octeontx2-af: Fix reference count issue in rvu_sdp_init()

pci_get_device() will decrease the reference count for the *from*
parameter. So we don't need to call put_device() to decrease the
reference. Let's remove the put_device() in the loop and only decrease
the reference count of the returned 'pdev' for the last loop because it
will not be passed to pci_get_device() as input parameter. We don't need
to check if 'pdev' is NULL because it is already checked inside
pci_dev_put(). Also add pci_dev_put() for the error path.

Fixes: fe1939bb2340 ("octeontx2-af: Add SDP interface support")
Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Reviewed-by: Saeed Mahameed <saeed@kernel.org>
Link: https://lore.kernel.org/r/20221123065919.31499-1-wangxiongfeng2@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
23 months agonet: altera_tse: release phylink resources in tse_shutdown()
Liu Jian [Wed, 23 Nov 2022 01:16:17 +0000 (09:16 +0800)]
net: altera_tse: release phylink resources in tse_shutdown()

Call phylink_disconnect_phy() in tse_shutdown() to release the
resources occupied by phylink_of_phy_connect() in the tse_open().

Fixes: fef2998203e1 ("net: altera: tse: convert to phylink")
Signed-off-by: Liu Jian <liujian56@huawei.com>
Link: https://lore.kernel.org/r/20221123011617.332302-1-liujian56@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
23 months agovirtio_net: Fix probe failed when modprobe virtio_net
Li Zetao [Tue, 22 Nov 2022 15:00:46 +0000 (23:00 +0800)]
virtio_net: Fix probe failed when modprobe virtio_net

When doing the following test steps, an error was found:
  step 1: modprobe virtio_net succeeded
    # modprobe virtio_net        <-- OK

  step 2: fault injection in register_netdevice()
    # modprobe -r virtio_net     <-- OK
    # ...
      FAULT_INJECTION: forcing a failure.
      name failslab, interval 1, probability 0, space 0, times 0
      CPU: 0 PID: 3521 Comm: modprobe
      Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
      Call Trace:
       <TASK>
       ...
       should_failslab+0xa/0x20
       ...
       dev_set_name+0xc0/0x100
       netdev_register_kobject+0xc2/0x340
       register_netdevice+0xbb9/0x1320
       virtnet_probe+0x1d72/0x2658 [virtio_net]
       ...
       </TASK>
      virtio_net: probe of virtio0 failed with error -22

  step 3: modprobe virtio_net failed
    # modprobe virtio_net        <-- failed
      virtio_net: probe of virtio0 failed with error -2

The root cause of the problem is that the queues are not
disable on the error handling path when register_netdevice()
fails in virtnet_probe(), resulting in an error "-ENOENT"
returned in the next modprobe call in setup_vq().

virtio_pci_modern_device uses virtqueues to send or
receive message, and "queue_enable" records whether the
queues are available. In vp_modern_find_vqs(), all queues
will be selected and activated, but once queues are enabled
there is no way to go back except reset.

Fix it by reset virtio device on error handling path. This
makes error handling follow the same order as normal device
cleanup in virtnet_remove() which does: unregister, destroy
failover, then reset. And that flow is better tested than
error handling so we can be reasonably sure it works well.

Fixes: 024655555021 ("virtio_net: fix use after free on allocation failure")
Signed-off-by: Li Zetao <lizetao1@huawei.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Link: https://lore.kernel.org/r/20221122150046.3910638-1-lizetao1@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
23 months agonet: wwan: t7xx: Fix the ACPI memory leak
Hanjun Guo [Tue, 22 Nov 2022 12:19:40 +0000 (20:19 +0800)]
net: wwan: t7xx: Fix the ACPI memory leak

The ACPI buffer memory (buffer.pointer) should be freed as the
buffer is not used after acpi_evaluate_object(), free it to
prevent memory leak.

Fixes: 13e920d93e37 ("net: wwan: t7xx: Add core components")
Signed-off-by: Hanjun Guo <guohanjun@huawei.com>
Link: https://lore.kernel.org/r/1669119580-28977-1-git-send-email-guohanjun@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
23 months agoocteontx2-pf: Add check for devm_kcalloc
Jiasheng Jiang [Tue, 22 Nov 2022 05:54:49 +0000 (13:54 +0800)]
octeontx2-pf: Add check for devm_kcalloc

As the devm_kcalloc may return NULL pointer,
it should be better to add check for the return
value, as same as the others.

Fixes: e8e095b3b370 ("octeontx2-af: cn10k: Bandwidth profiles config support")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Link: https://lore.kernel.org/r/20221122055449.31247-1-jiasheng@iscas.ac.cn
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
23 months agonet: enetc: preserve TX ring priority across reconfiguration
Vladimir Oltean [Tue, 22 Nov 2022 13:09:36 +0000 (15:09 +0200)]
net: enetc: preserve TX ring priority across reconfiguration

In the blamed commit, a rudimentary reallocation procedure for RX buffer
descriptors was implemented, for the situation when their format changes
between normal (no PTP) and extended (PTP).

enetc_hwtstamp_set() calls enetc_close() and enetc_open() in a sequence,
and this sequence loses information which was previously configured in
the TX BDR Mode Register, specifically via the enetc_set_bdr_prio() call.
The TX ring priority is configured by tc-mqprio and tc-taprio, and
affects important things for TSN such as the TX time of packets. The
issue manifests itself most visibly by the fact that isochron --txtime
reports premature packet transmissions when PTP is first enabled on an
enetc interface.

Save the TX ring priority in a new field in struct enetc_bdr (occupies a
2 byte hole on arm64) in order to make this survive a ring reconfiguration.

Fixes: 434cebabd3a2 ("enetc: Add dynamic allocation of extended Rx BD rings")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Alexander Lobakin <alexandr.lobakin@intel.com>
Link: https://lore.kernel.org/r/20221122130936.1704151-1-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
23 months agonet: marvell: prestera: add missing unregister_netdev() in prestera_port_create()
Zhang Changzhong [Tue, 22 Nov 2022 11:10:31 +0000 (19:10 +0800)]
net: marvell: prestera: add missing unregister_netdev() in prestera_port_create()

If prestera_port_sfp_bind() fails, unregister_netdev() should be called
in error handling path.

Compile tested only.

Fixes: 52323ef75414 ("net: marvell: prestera: add phylink support")
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Link: https://lore.kernel.org/r/1669115432-36841-1-git-send-email-zhangchangzhong@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
23 months agoMerge branch 'nfc-st-nci-restructure-validating-logic-in-evt_transaction'
Jakub Kicinski [Thu, 24 Nov 2022 04:01:53 +0000 (20:01 -0800)]
Merge branch 'nfc-st-nci-restructure-validating-logic-in-evt_transaction'

Martin Faltesek says:

====================
nfc: st-nci: Restructure validating logic in EVT_TRANSACTION

These are the same 3 patches that were applied in st21nfca here:
https://lore.kernel.org/netdev/20220607025729.1673212-1-mfaltesek@google.com
with a couple minor differences.

st-nci has nearly identical code to that of st21nfca for EVT_TRANSACTION,
except that there are two extra validation checks that are not present
in the st-nci code.

The 3/3 patch as coded for st21nfca pulls those checks in, bringing both
drivers into parity.
====================

Link: https://lore.kernel.org/r/20221122004246.4186422-1-mfaltesek@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
23 months agonfc: st-nci: fix incorrect sizing calculations in EVT_TRANSACTION
Martin Faltesek [Tue, 22 Nov 2022 00:42:46 +0000 (18:42 -0600)]
nfc: st-nci: fix incorrect sizing calculations in EVT_TRANSACTION

The transaction buffer is allocated by using the size of the packet buf,
and subtracting two which seems intended to remove the two tags which are
not present in the target structure. This calculation leads to under
counting memory because of differences between the packet contents and the
target structure. The aid_len field is a u8 in the packet, but a u32 in
the structure, resulting in at least 3 bytes always being under counted.
Further, the aid data is a variable length field in the packet, but fixed
in the structure, so if this field is less than the max, the difference is
added to the under counting.

To fix, perform validation checks progressively to safely reach the
next field, to determine the size of both buffers and verify both tags.
Once all validation checks pass, allocate the buffer and copy the data.
This eliminates freeing memory on the error path, as validation checks are
moved ahead of memory allocation.

Reported-by: Denis Efremov <denis.e.efremov@oracle.com>
Reviewed-by: Guenter Roeck <groeck@google.com>
Fixes: 5d1ceb7f5e56 ("NFC: st21nfcb: Add HCI transaction event support")
Signed-off-by: Martin Faltesek <mfaltesek@google.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
23 months agonfc: st-nci: fix memory leaks in EVT_TRANSACTION
Martin Faltesek [Tue, 22 Nov 2022 00:42:45 +0000 (18:42 -0600)]
nfc: st-nci: fix memory leaks in EVT_TRANSACTION

Error path does not free previously allocated memory. Add devm_kfree() to
the failure path.

Reported-by: Denis Efremov <denis.e.efremov@oracle.com>
Reviewed-by: Guenter Roeck <groeck@google.com>
Fixes: 5d1ceb7f5e56 ("NFC: st21nfcb: Add HCI transaction event support")
Signed-off-by: Martin Faltesek <mfaltesek@google.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
23 months agonfc: st-nci: fix incorrect validating logic in EVT_TRANSACTION
Martin Faltesek [Tue, 22 Nov 2022 00:42:44 +0000 (18:42 -0600)]
nfc: st-nci: fix incorrect validating logic in EVT_TRANSACTION

The first validation check for EVT_TRANSACTION has two different checks
tied together with logical AND. One is a check for minimum packet length,
and the other is for a valid aid_tag. If either condition is true (fails),
then an error should be triggered. The fix is to change && to ||.

Reported-by: Denis Efremov <denis.e.efremov@oracle.com>
Reviewed-by: Guenter Roeck <groeck@google.com>
Fixes: 5d1ceb7f5e56 ("NFC: st21nfcb: Add HCI transaction event support")
Signed-off-by: Martin Faltesek <mfaltesek@google.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
23 months agoublk_drv: don't forward io commands in reserve order
Ming Lei [Mon, 21 Nov 2022 15:56:45 +0000 (23:56 +0800)]
ublk_drv: don't forward io commands in reserve order

Either ublk_can_use_task_work() is true or not, io commands are
forwarded to ublk server in reverse order, since llist_add() is
always to add one element to the head of the list.

Even though block layer doesn't guarantee request dispatch order,
requests should be sent to hardware in the sequence order generated
from io scheduler, which usually considers the request's LBA, and
order is often important for HDD.

So forward io commands in the sequence made from io scheduler by
aligning task work with current io_uring command's batch handling,
and it has been observed that both can get similar performance data
if IORING_SETUP_COOP_TASKRUN is set from ublk server.

Reported-by: Andreas Hindborg <andreas.hindborg@wdc.com>
Cc: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: ZiyangZhang <ZiyangZhang@linux.alibaba.com>
Link: https://lore.kernel.org/r/20221121155645.396272-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
23 months agoMerge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec
Jakub Kicinski [Thu, 24 Nov 2022 03:18:58 +0000 (19:18 -0800)]
Merge branch 'master' of git://git./linux/kernel/git/klassert/ipsec

Steffen Klassert says:

====================
ipsec 2022-11-23

1) Fix "disable_policy" on ipv4 early demuxP Packets after
   the initial packet in a flow might be incorectly dropped
   on early demux if there are no matching policies.
   From Eyal Birger.

2) Fix a kernel warning in case XFRM encap type is not
   available. From Eyal Birger.

3) Fix ESN wrap around for GSO to avoid a double usage of a
    sequence number. From Christian Langrock.

4) Fix a send_acquire race with pfkey_register.
   From Herbert Xu.

5) Fix a list corruption panic in __xfrm_state_delete().
   Thomas Jarosch.

6) Fix an unchecked return value in xfrm6_init().
   Chen Zhongjin.

* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec:
  xfrm: Fix ignored return value in xfrm6_init()
  xfrm: Fix oops in __xfrm_state_delete()
  af_key: Fix send_acquire race with pfkey_register
  xfrm: replay: Fix ESN wrap around for GSO
  xfrm: lwtunnel: squelch kernel warning in case XFRM encap type is not available
  xfrm: fix "disable_policy" on ipv4 early demux
====================

Link: https://lore.kernel.org/r/20221123093117.434274-1-steffen.klassert@secunet.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
23 months agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf
Jakub Kicinski [Thu, 24 Nov 2022 03:12:56 +0000 (19:12 -0800)]
Merge git://git./linux/kernel/git/netfilter/nf

Pablo Neira Ayuso says:

====================
Netfilter fixes for net

1) Fix regression in ipset hash:ip with IPv4 range, from Vishwanath Pai.
   This is fixing up a bug introduced in the 6.0 release.

2) The "netfilter: ipset: enforce documented limit to prevent allocating
   huge memory" patch contained a wrong condition which makes impossible to
   add up to 64 clashing elements to a hash:net,iface type of set while it
   is the documented feature of the set type. The patch fixes the condition
   and thus makes possible to add the elements while keeps preventing
   allocating huge memory, from Jozsef Kadlecsik. This has been broken
   for several releases.

3) Missing locking when updating the flow block list which might lead
   a reader to crash. This has been broken since the introduction of the
   flowtable hardware offload support.

* git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf:
  netfilter: flowtable_offload: add missing locking
  netfilter: ipset: restore allowing 64 clashing elements in hash:net,iface
  netfilter: ipset: regression in ip_set_hash_ip.c
====================

Link: https://lore.kernel.org/r/20221122212814.63177-1-pablo@netfilter.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
23 months agoDocumentation: networking: Update generic_netlink_howto URL
Nir Levy [Sun, 20 Nov 2022 22:06:30 +0000 (00:06 +0200)]
Documentation: networking: Update generic_netlink_howto URL

The documentation refers to invalid web page under www.linuxfoundation.org
The patch refers to a working URL under wiki.linuxfoundation.org

Signed-off-by: Nir Levy <bhr166@gmail.com>
Link: https://lore.kernel.org/all/20221120220630.7443-1-bhr166@gmail.com/
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
23 months agoscripts: add rust in scripts/Makefile.package
Paran Lee [Wed, 23 Nov 2022 22:00:44 +0000 (07:00 +0900)]
scripts: add rust in scripts/Makefile.package

Add rust argument at TAR_CONTENT in
scripts/Makefile.package script with alphabetical order.

Signed-off-by: Paran Lee <p4ranlee@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
23 months agokbuild: fix "cat: .version: No such file or directory"
Masahiro Yamada [Tue, 22 Nov 2022 14:39:02 +0000 (23:39 +0900)]
kbuild: fix "cat: .version: No such file or directory"

Since commit 2df8220cc511 ("kbuild: build init/built-in.a just once"),
the .version file is not touched at all when KBUILD_BUILD_VERSION is
given.

If KBUILD_BUILD_VERSION is specified and the .version file is missing
(for example right after 'make mrproper'), "No such file or director"
is shown. Even if the .version exists, it is irrelevant to the version
of the current build.

  $ make -j$(nproc) KBUILD_BUILD_VERSION=100 mrproper defconfig all
    [ snip ]
    BUILD   arch/x86/boot/bzImage
  cat: .version: No such file or directory
  Kernel: arch/x86/boot/bzImage is ready  (#)

Show KBUILD_BUILD_VERSION if it is given.

Fixes: 2df8220cc511 ("kbuild: build init/built-in.a just once")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <nicolas@fjasle.eu>
23 months agoMerge branch 'kvm-dwmw2-fixes' into HEAD
Paolo Bonzini [Wed, 23 Nov 2022 23:52:29 +0000 (18:52 -0500)]
Merge branch 'kvm-dwmw2-fixes' into HEAD

This brings in a few important fixes for Xen emulation.
While nobody should be enabling it, the bug effectively
allows userspace to read arbitrary memory.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
23 months agoKVM: Update gfn_to_pfn_cache khva when it moves within the same page
David Woodhouse [Sat, 19 Nov 2022 09:25:39 +0000 (09:25 +0000)]
KVM: Update gfn_to_pfn_cache khva when it moves within the same page

In the case where a GPC is refreshed to a different location within the
same page, we didn't bother to update it. Mostly we don't need to, but
since the ->khva field also includes the offset within the page, that
does have to be updated.

Fixes: 3ba2c95ea180 ("KVM: Do not incorporate page offset into gfn=>pfn cache user address")
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Cc: stable@kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
23 months agoKVM: x86/xen: Only do in-kernel acceleration of hypercalls for guest CPL0
David Woodhouse [Sat, 12 Nov 2022 13:52:25 +0000 (13:52 +0000)]
KVM: x86/xen: Only do in-kernel acceleration of hypercalls for guest CPL0

There are almost no hypercalls which are valid from CPL > 0, and definitely
none which are handled by the kernel.

Fixes: 2fd6df2f2b47 ("KVM: x86/xen: intercept EVTCHNOP_send from guests")
Reported-by: Michal Luczaj <mhal@rbox.co>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Cc: stable@kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
23 months agoKVM: x86/xen: Validate port number in SCHEDOP_poll
David Woodhouse [Sat, 12 Nov 2022 13:48:58 +0000 (13:48 +0000)]
KVM: x86/xen: Validate port number in SCHEDOP_poll

We shouldn't allow guests to poll on arbitrary port numbers off the end
of the event channel table.

Fixes: 1a65105a5aba ("KVM: x86/xen: handle PV spinlocks slowpath")
[dwmw2: my bug though; the original version did check the validity as a
 side-effect of an idr_find() which I ripped out in refactoring.]
Reported-by: Michal Luczaj <mhal@rbox.co>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Cc: stable@kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
23 months agoKVM: x86/mmu: Fix race condition in direct_page_fault
Kazuki Takiguchi [Wed, 23 Nov 2022 19:36:00 +0000 (14:36 -0500)]
KVM: x86/mmu: Fix race condition in direct_page_fault

make_mmu_pages_available() must be called with mmu_lock held for write.
However, if the TDP MMU is used, it will be called with mmu_lock held for
read.
This function does nothing unless shadow pages are used, so there is no
race unless nested TDP is used.
Since nested TDP uses shadow pages, old shadow pages may be zapped by this
function even when the TDP MMU is enabled.
Since shadow pages are never allocated by kvm_tdp_mmu_map(), a race
condition can be avoided by not calling make_mmu_pages_available() if the
TDP MMU is currently in use.

I encountered this when repeatedly starting and stopping nested VM.
It can be artificially caused by allocating a large number of nested TDP
SPTEs.

For example, the following BUG and general protection fault are caused in
the host kernel.

pte_list_remove: 00000000cd54fc10 many->many
------------[ cut here ]------------
kernel BUG at arch/x86/kvm/mmu/mmu.c:963!
invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
RIP: 0010:pte_list_remove.cold+0x16/0x48 [kvm]
Call Trace:
 <TASK>
 drop_spte+0xe0/0x180 [kvm]
 mmu_page_zap_pte+0x4f/0x140 [kvm]
 __kvm_mmu_prepare_zap_page+0x62/0x3e0 [kvm]
 kvm_mmu_zap_oldest_mmu_pages+0x7d/0xf0 [kvm]
 direct_page_fault+0x3cb/0x9b0 [kvm]
 kvm_tdp_page_fault+0x2c/0xa0 [kvm]
 kvm_mmu_page_fault+0x207/0x930 [kvm]
 npf_interception+0x47/0xb0 [kvm_amd]
 svm_invoke_exit_handler+0x13c/0x1a0 [kvm_amd]
 svm_handle_exit+0xfc/0x2c0 [kvm_amd]
 kvm_arch_vcpu_ioctl_run+0xa79/0x1780 [kvm]
 kvm_vcpu_ioctl+0x29b/0x6f0 [kvm]
 __x64_sys_ioctl+0x95/0xd0
 do_syscall_64+0x5c/0x90

general protection fault, probably for non-canonical address
0xdead000000000122: 0000 [#1] PREEMPT SMP NOPTI
RIP: 0010:kvm_mmu_commit_zap_page.part.0+0x4b/0xe0 [kvm]
Call Trace:
 <TASK>
 kvm_mmu_zap_oldest_mmu_pages+0xae/0xf0 [kvm]
 direct_page_fault+0x3cb/0x9b0 [kvm]
 kvm_tdp_page_fault+0x2c/0xa0 [kvm]
 kvm_mmu_page_fault+0x207/0x930 [kvm]
 npf_interception+0x47/0xb0 [kvm_amd]

CVE: CVE-2022-45869
Fixes: a2855afc7ee8 ("KVM: x86/mmu: Allow parallel page faults for the TDP MMU")
Signed-off-by: Kazuki Takiguchi <takiguchi.kazuki171@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
23 months agoMerge tag 'pci-v6.1-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Linus Torvalds [Wed, 23 Nov 2022 22:45:33 +0000 (14:45 -0800)]
Merge tag 'pci-v6.1-fixes-3' of git://git./linux/kernel/git/helgaas/pci

Pull pci fixes from Bjorn Helgaas:

 - Update MAINTAINERS to add Manivannan Sadhasivam as Qcom PCIe RC
   maintainer (replacing Stanimir Varbanov) and include DT PCI bindings
   in the "PCI native host bridge and endpoint drivers" entry.

* tag 'pci-v6.1-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  MAINTAINERS: Include PCI bindings in host bridge entry
  MAINTAINERS: Add Manivannan Sadhasivam as Qcom PCIe RC maintainer

23 months agoNFSD: Fix reads with a non-zero offset that don't end on a page boundary
Chuck Lever [Wed, 23 Nov 2022 19:14:32 +0000 (14:14 -0500)]
NFSD: Fix reads with a non-zero offset that don't end on a page boundary

This was found when virtual machines with nfs-mounted qcow2 disks
failed to boot properly.

Reported-by: Anders Blomdell <anders.blomdell@control.lth.se>
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://bugzilla.redhat.com/show_bug.cgi?id=2142132
Fixes: bfbfb6182ad1 ("nfsd_splice_actor(): handle compound pages")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
23 months agoMerge tag 'spi-fix-v6.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Linus Torvalds [Wed, 23 Nov 2022 19:19:06 +0000 (11:19 -0800)]
Merge tag 'spi-fix-v6.1-rc6' of git://git./linux/kernel/git/broonie/spi

Pull spi fixes from Mark Brown:
 "A few fixes, all device specific.

  The most important ones are for the i.MX driver which had a couple of
  nasty data corruption inducing errors appear after the change to
  support PIO mode in the last merge window (one introduced by the
  change and one latent one which the PIO changes exposed).

  Thanks to Frieder, Fabio, Marc and Marek for jumping on that and
  resolving the issues quickly once they were found"

* tag 'spi-fix-v6.1-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: spi-imx: spi_imx_transfer_one(): check for DMA transfer first
  spi: tegra210-quad: Fix duplicate resource error
  spi: dw-dma: decrease reference count in dw_spi_dma_init_mfld()
  spi: spi-imx: Fix spi_bus_clk if requested clock is higher than input clock
  spi: mediatek: Fix DEVAPC Violation at KO Remove

23 months agoMerge tag '9p-for-6.1-rc7' of https://github.com/martinetd/linux
Linus Torvalds [Wed, 23 Nov 2022 19:06:09 +0000 (11:06 -0800)]
Merge tag '9p-for-6.1-rc7' of https://github.com/martinetd/linux

Pull 9p fixes from Dominique Martinet:

 - 9p now uses a variable size for its recv buffer, but every place
   hadn't been updated properly to use it and some buffer overflows have
   been found and needed fixing.

   There's still one place where msize is incorrectly used in a safety
   check (p9_check_errors), but all paths leading to it should already
   be avoiding overflows and that patch took a bit more time to get
   right for zero-copy requests so I'll send it for 6.2

 - yet another race condition in p9_conn_cancel introduced by a fix for
   a syzbot report in the same place. Maybe at some point we'll get it
   right without burning it all down...

* tag '9p-for-6.1-rc7' of https://github.com/martinetd/linux:
  9p/xen: check logical size for buffer size
  9p/fd: Use P9_HDRSZ for header size
  9p/fd: Fix write overflow in p9_read_work
  9p/fd: fix issue of list_del corruption in p9_fd_cancel()

23 months agolib/vdso: use "grep -E" instead of "egrep"
Greg Kroah-Hartman [Tue, 20 Sep 2022 17:06:33 +0000 (19:06 +0200)]
lib/vdso: use "grep -E" instead of "egrep"

The latest version of grep claims the egrep is now obsolete so the build
now contains warnings that look like:
egrep: warning: egrep is obsolescent; using grep -E
fix this up by moving the vdso Makefile to use "grep -E" instead.

Cc: Andy Lutomirski <luto@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
Link: https://lore.kernel.org/r/20220920170633.3133829-1-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
23 months agofscache: fix OOB Read in __fscache_acquire_volume
David Howells [Mon, 21 Nov 2022 16:31:34 +0000 (16:31 +0000)]
fscache: fix OOB Read in __fscache_acquire_volume

The type of a->key[0] is char in fscache_volume_same().  If the length
of cache volume key is greater than 127, the value of a->key[0] is less
than 0.  In this case, klen becomes much larger than 255 after type
conversion, because the type of klen is size_t.  As a result, memcmp()
is read out of bounds.

This causes a slab-out-of-bounds Read in __fscache_acquire_volume(), as
reported by Syzbot.

Fix this by changing the type of the stored key to "u8 *" rather than
"char *" (it isn't a simple string anyway).  Also put in a check that
the volume name doesn't exceed NAME_MAX.

  BUG: KASAN: slab-out-of-bounds in memcmp+0x16f/0x1c0 lib/string.c:757
  Read of size 8 at addr ffff888016f3aa90 by task syz-executor344/3613
  Call Trace:
   memcmp+0x16f/0x1c0 lib/string.c:757
   memcmp include/linux/fortify-string.h:420 [inline]
   fscache_volume_same fs/fscache/volume.c:133 [inline]
   fscache_hash_volume fs/fscache/volume.c:171 [inline]
   __fscache_acquire_volume+0x76c/0x1080 fs/fscache/volume.c:328
   fscache_acquire_volume include/linux/fscache.h:204 [inline]
   v9fs_cache_session_get_cookie+0x143/0x240 fs/9p/cache.c:34
   v9fs_session_init+0x1166/0x1810 fs/9p/v9fs.c:473
   v9fs_mount+0xba/0xc90 fs/9p/vfs_super.c:126
   legacy_get_tree+0x105/0x220 fs/fs_context.c:610
   vfs_get_tree+0x89/0x2f0 fs/super.c:1530
   do_new_mount fs/namespace.c:3040 [inline]
   path_mount+0x1326/0x1e20 fs/namespace.c:3370
   do_mount fs/namespace.c:3383 [inline]
   __do_sys_mount fs/namespace.c:3591 [inline]
   __se_sys_mount fs/namespace.c:3568 [inline]
   __x64_sys_mount+0x27f/0x300 fs/namespace.c:3568

Fixes: 62ab63352350 ("fscache: Implement volume registration")
Reported-by: syzbot+a76f6a6e524cf2080aa3@syzkaller.appspotmail.com
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Zhang Peng <zhangpeng362@huawei.com>
Reviewed-by: Jingbo Xu <jefflexu@linux.alibaba.com>
cc: Dominique Martinet <asmadeus@codewreck.org>
cc: Jeff Layton <jlayton@kernel.org>
cc: v9fs-developer@lists.sourceforge.net
cc: linux-cachefs@redhat.com
Link: https://lore.kernel.org/r/Y3OH+Dmi0QIOK18n@codewreck.org/
Link: https://lore.kernel.org/r/20221115140447.2971680-1-zhangpeng362@huawei.com/
Link: https://lore.kernel.org/r/166869954095.3793579.8500020902371015443.stgit@warthog.procyon.org.uk/
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
23 months agos390/dasd: fix possible buffer overflow in copy_pair_show
Stefan Haberland [Wed, 23 Nov 2022 16:07:19 +0000 (17:07 +0100)]
s390/dasd: fix possible buffer overflow in copy_pair_show

dasd_copy_relation->entry[] array might be accessed out of bounds if the
loop does not break.

Fixes: a91ff09d39f9 ("s390/dasd: add copy pair setup")
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com>
Link: https://lore.kernel.org/r/20221123160719.3002694-5-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
23 months agos390/dasd: fix no record found for raw_track_access
Stefan Haberland [Wed, 23 Nov 2022 16:07:18 +0000 (17:07 +0100)]
s390/dasd: fix no record found for raw_track_access

For DASD devices in raw_track_access mode only full track images are
read and written.
For this purpose it is not necessary to do search operation in the
locate record extended function. The documentation even states that
this might fail if the searched record is not found on a track.

Currently the driver sets a value of 1 in the search field for the first
record after record zero. This is the default for disks not in
raw_track_access mode but record 1 might be missing on a completely
empty track.

There has not been any problem with this on IBM storage servers but it
might lead to errors with DASD devices on other vendors storage servers.

Fix this by setting the search field to 0. Record zero is always available
even on a completely empty track.

Fixes: e4dbb0f2b5dd ("[S390] dasd: Add support for raw ECKD access.")
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com>
Link: https://lore.kernel.org/r/20221123160719.3002694-4-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
23 months agos390/dasd: increase printing of debug data payload
Stefan Haberland [Wed, 23 Nov 2022 16:07:17 +0000 (17:07 +0100)]
s390/dasd: increase printing of debug data payload

32 byte are to less for important data from prefix or
other commands.
Print up to 128 byte data. This is enough for the largest
CCW data we have.

Since printk can only print up to 1024 byte at once, print the
different parts of the CCW dumps separately.

Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Reviewed-by: Jan Hoeppner <hoeppner@linux.ibm.com>
Link: https://lore.kernel.org/r/20221123160719.3002694-3-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
23 months agos390/dasd: Fix spelling mistake "Ivalid" -> "Invalid"
Colin Ian King [Wed, 23 Nov 2022 16:07:16 +0000 (17:07 +0100)]
s390/dasd: Fix spelling mistake "Ivalid" -> "Invalid"

There is a spelling mistake in a pr_warn message. Fix it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20220923132103.2486724-1-colin.i.king@gmail.com
Signed-off-by: Stefan Haberland <sth@linux.ibm.com>
Link: https://lore.kernel.org/r/20221123160719.3002694-2-sth@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
23 months agoMerge tag 'asoc-fix-v6.1-rc6' of https://git.kernel.org/pub/scm/linux/kernel/git...
Takashi Iwai [Wed, 23 Nov 2022 16:14:10 +0000 (17:14 +0100)]
Merge tag 'asoc-fix-v6.1-rc6' of https://git./linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v6.1

A clutch of small fixes that have come in in the past week, people seem
to have been unusually active for this late in the release cycle.  The
most critical one here is the fix to renumber the SOF DAI types in order
to restore ABI compatibility which was broken by the addition of AMD
support.

23 months agobtrfs: sysfs: normalize the error handling branch in btrfs_init_sysfs()
Zhen Lei [Tue, 22 Nov 2022 11:50:02 +0000 (19:50 +0800)]
btrfs: sysfs: normalize the error handling branch in btrfs_init_sysfs()

Although kset_unregister() can eventually remove all attribute files,
explicitly rolling back with the matching function makes the code logic
look clearer.

CC: stable@vger.kernel.org # 5.4+
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
23 months agobtrfs: do not modify log tree while holding a leaf from fs tree locked
Filipe Manana [Mon, 21 Nov 2022 10:23:22 +0000 (10:23 +0000)]
btrfs: do not modify log tree while holding a leaf from fs tree locked

When logging an inode in full mode, or when logging xattrs or when logging
the dir index items of a directory, we are modifying the log tree while
holding a read lock on a leaf from the fs/subvolume tree. This can lead to
a deadlock in rare circumstances, but it is a real possibility, and it was
recently reported by syzbot with the following trace from lockdep:

   WARNING: possible circular locking dependency detected
   6.1.0-rc5-next-20221116-syzkaller #0 Not tainted
   ------------------------------------------------------
   syz-executor.1/16154 is trying to acquire lock:
   ffff88807e3084a0 (&delayed_node->mutex){+.+.}-{3:3}, at: __btrfs_release_delayed_node.part.0+0xa1/0xf30 fs/btrfs/delayed-inode.c:256

   but task is already holding lock:
   ffff88807df33078 (btrfs-log-00){++++}-{3:3}, at: __btrfs_tree_lock+0x32/0x3d0 fs/btrfs/locking.c:197

   which lock already depends on the new lock.

   the existing dependency chain (in reverse order) is:

   -> #2 (btrfs-log-00){++++}-{3:3}:
          down_read_nested+0x9e/0x450 kernel/locking/rwsem.c:1634
          __btrfs_tree_read_lock+0x32/0x350 fs/btrfs/locking.c:135
          btrfs_tree_read_lock fs/btrfs/locking.c:141 [inline]
          btrfs_read_lock_root_node+0x82/0x3a0 fs/btrfs/locking.c:280
          btrfs_search_slot_get_root fs/btrfs/ctree.c:1678 [inline]
          btrfs_search_slot+0x3ca/0x2c70 fs/btrfs/ctree.c:1998
          btrfs_lookup_csum+0x116/0x3f0 fs/btrfs/file-item.c:209
          btrfs_csum_file_blocks+0x40e/0x1370 fs/btrfs/file-item.c:1021
          log_csums.isra.0+0x244/0x2d0 fs/btrfs/tree-log.c:4258
          copy_items.isra.0+0xbfb/0xed0 fs/btrfs/tree-log.c:4403
          copy_inode_items_to_log+0x13d6/0x1d90 fs/btrfs/tree-log.c:5873
          btrfs_log_inode+0xb19/0x4680 fs/btrfs/tree-log.c:6495
          btrfs_log_inode_parent+0x890/0x2a20 fs/btrfs/tree-log.c:6982
          btrfs_log_dentry_safe+0x59/0x80 fs/btrfs/tree-log.c:7083
          btrfs_sync_file+0xa41/0x13c0 fs/btrfs/file.c:1921
          vfs_fsync_range+0x13e/0x230 fs/sync.c:188
          generic_write_sync include/linux/fs.h:2856 [inline]
          iomap_dio_complete+0x73a/0x920 fs/iomap/direct-io.c:128
          btrfs_direct_write fs/btrfs/file.c:1536 [inline]
          btrfs_do_write_iter+0xba2/0x1470 fs/btrfs/file.c:1668
          call_write_iter include/linux/fs.h:2160 [inline]
          do_iter_readv_writev+0x20b/0x3b0 fs/read_write.c:735
          do_iter_write+0x182/0x700 fs/read_write.c:861
          vfs_iter_write+0x74/0xa0 fs/read_write.c:902
          iter_file_splice_write+0x745/0xc90 fs/splice.c:686
          do_splice_from fs/splice.c:764 [inline]
          direct_splice_actor+0x114/0x180 fs/splice.c:931
          splice_direct_to_actor+0x335/0x8a0 fs/splice.c:886
          do_splice_direct+0x1ab/0x280 fs/splice.c:974
          do_sendfile+0xb19/0x1270 fs/read_write.c:1255
          __do_sys_sendfile64 fs/read_write.c:1323 [inline]
          __se_sys_sendfile64 fs/read_write.c:1309 [inline]
          __x64_sys_sendfile64+0x259/0x2c0 fs/read_write.c:1309
          do_syscall_x64 arch/x86/entry/common.c:50 [inline]
          do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
          entry_SYSCALL_64_after_hwframe+0x63/0xcd

   -> #1 (btrfs-tree-00){++++}-{3:3}:
          __lock_release kernel/locking/lockdep.c:5382 [inline]
          lock_release+0x371/0x810 kernel/locking/lockdep.c:5688
          up_write+0x2a/0x520 kernel/locking/rwsem.c:1614
          btrfs_tree_unlock_rw fs/btrfs/locking.h:189 [inline]
          btrfs_unlock_up_safe+0x1e3/0x290 fs/btrfs/locking.c:238
          search_leaf fs/btrfs/ctree.c:1832 [inline]
          btrfs_search_slot+0x265e/0x2c70 fs/btrfs/ctree.c:2074
          btrfs_insert_empty_items+0xbd/0x1c0 fs/btrfs/ctree.c:4133
          btrfs_insert_delayed_item+0x826/0xfa0 fs/btrfs/delayed-inode.c:746
          btrfs_insert_delayed_items fs/btrfs/delayed-inode.c:824 [inline]
          __btrfs_commit_inode_delayed_items fs/btrfs/delayed-inode.c:1111 [inline]
          __btrfs_run_delayed_items+0x280/0x590 fs/btrfs/delayed-inode.c:1153
          flush_space+0x147/0xe90 fs/btrfs/space-info.c:728
          btrfs_async_reclaim_metadata_space+0x541/0xc10 fs/btrfs/space-info.c:1086
          process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289
          worker_thread+0x669/0x1090 kernel/workqueue.c:2436
          kthread+0x2e8/0x3a0 kernel/kthread.c:376
          ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

   -> #0 (&delayed_node->mutex){+.+.}-{3:3}:
          check_prev_add kernel/locking/lockdep.c:3097 [inline]
          check_prevs_add kernel/locking/lockdep.c:3216 [inline]
          validate_chain kernel/locking/lockdep.c:3831 [inline]
          __lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5055
          lock_acquire kernel/locking/lockdep.c:5668 [inline]
          lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633
          __mutex_lock_common kernel/locking/mutex.c:603 [inline]
          __mutex_lock+0x12f/0x1360 kernel/locking/mutex.c:747
          __btrfs_release_delayed_node.part.0+0xa1/0xf30 fs/btrfs/delayed-inode.c:256
          __btrfs_release_delayed_node fs/btrfs/delayed-inode.c:251 [inline]
          btrfs_release_delayed_node fs/btrfs/delayed-inode.c:281 [inline]
          btrfs_remove_delayed_node+0x52/0x60 fs/btrfs/delayed-inode.c:1285
          btrfs_evict_inode+0x511/0xf30 fs/btrfs/inode.c:5554
          evict+0x2ed/0x6b0 fs/inode.c:664
          dispose_list+0x117/0x1e0 fs/inode.c:697
          prune_icache_sb+0xeb/0x150 fs/inode.c:896
          super_cache_scan+0x391/0x590 fs/super.c:106
          do_shrink_slab+0x464/0xce0 mm/vmscan.c:843
          shrink_slab_memcg mm/vmscan.c:912 [inline]
          shrink_slab+0x388/0x660 mm/vmscan.c:991
          shrink_node_memcgs mm/vmscan.c:6088 [inline]
          shrink_node+0x93d/0x1f30 mm/vmscan.c:6117
          shrink_zones mm/vmscan.c:6355 [inline]
          do_try_to_free_pages+0x3b4/0x17a0 mm/vmscan.c:6417
          try_to_free_mem_cgroup_pages+0x3a4/0xa70 mm/vmscan.c:6732
          reclaim_high.constprop.0+0x182/0x230 mm/memcontrol.c:2393
          mem_cgroup_handle_over_high+0x190/0x520 mm/memcontrol.c:2578
          try_charge_memcg+0xe0c/0x12f0 mm/memcontrol.c:2816
          try_charge mm/memcontrol.c:2827 [inline]
          charge_memcg+0x90/0x3b0 mm/memcontrol.c:6889
          __mem_cgroup_charge+0x2b/0x90 mm/memcontrol.c:6910
          mem_cgroup_charge include/linux/memcontrol.h:667 [inline]
          __filemap_add_folio+0x615/0xf80 mm/filemap.c:852
          filemap_add_folio+0xaf/0x1e0 mm/filemap.c:934
          __filemap_get_folio+0x389/0xd80 mm/filemap.c:1976
          pagecache_get_page+0x2e/0x280 mm/folio-compat.c:104
          find_or_create_page include/linux/pagemap.h:612 [inline]
          alloc_extent_buffer+0x2b9/0x1580 fs/btrfs/extent_io.c:4588
          btrfs_init_new_buffer fs/btrfs/extent-tree.c:4869 [inline]
          btrfs_alloc_tree_block+0x2e1/0x1320 fs/btrfs/extent-tree.c:4988
          __btrfs_cow_block+0x3b2/0x1420 fs/btrfs/ctree.c:440
          btrfs_cow_block+0x2fa/0x950 fs/btrfs/ctree.c:595
          btrfs_search_slot+0x11b0/0x2c70 fs/btrfs/ctree.c:2038
          btrfs_update_root+0xdb/0x630 fs/btrfs/root-tree.c:137
          update_log_root fs/btrfs/tree-log.c:2841 [inline]
          btrfs_sync_log+0xbfb/0x2870 fs/btrfs/tree-log.c:3064
          btrfs_sync_file+0xdb9/0x13c0 fs/btrfs/file.c:1947
          vfs_fsync_range+0x13e/0x230 fs/sync.c:188
          generic_write_sync include/linux/fs.h:2856 [inline]
          iomap_dio_complete+0x73a/0x920 fs/iomap/direct-io.c:128
          btrfs_direct_write fs/btrfs/file.c:1536 [inline]
          btrfs_do_write_iter+0xba2/0x1470 fs/btrfs/file.c:1668
          call_write_iter include/linux/fs.h:2160 [inline]
          do_iter_readv_writev+0x20b/0x3b0 fs/read_write.c:735
          do_iter_write+0x182/0x700 fs/read_write.c:861
          vfs_iter_write+0x74/0xa0 fs/read_write.c:902
          iter_file_splice_write+0x745/0xc90 fs/splice.c:686
          do_splice_from fs/splice.c:764 [inline]
          direct_splice_actor+0x114/0x180 fs/splice.c:931
          splice_direct_to_actor+0x335/0x8a0 fs/splice.c:886
          do_splice_direct+0x1ab/0x280 fs/splice.c:974
          do_sendfile+0xb19/0x1270 fs/read_write.c:1255
          __do_sys_sendfile64 fs/read_write.c:1323 [inline]
          __se_sys_sendfile64 fs/read_write.c:1309 [inline]
          __x64_sys_sendfile64+0x259/0x2c0 fs/read_write.c:1309
          do_syscall_x64 arch/x86/entry/common.c:50 [inline]
          do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
          entry_SYSCALL_64_after_hwframe+0x63/0xcd

   other info that might help us debug this:

   Chain exists of:
     &delayed_node->mutex --> btrfs-tree-00 --> btrfs-log-00

   Possible unsafe locking scenario:

          CPU0                    CPU1
          ----                    ----
     lock(btrfs-log-00);
                                  lock(btrfs-tree-00);
                                  lock(btrfs-log-00);
     lock(&delayed_node->mutex);

Holding a read lock on a leaf from a fs/subvolume tree creates a nasty
lock dependency when we are COWing extent buffers for the log tree and we
have two tasks modifying the log tree, with each one in one of the
following 2 scenarios:

1) Modifying the log tree triggers an extent buffer allocation while
   holding a write lock on a parent extent buffer from the log tree.
   Allocating the pages for an extent buffer, or the extent buffer
   struct, can trigger inode eviction and finally the inode eviction
   will trigger a release/remove of a delayed node, which requires
   taking the delayed node's mutex;

2) Allocating a metadata extent for a log tree can trigger the async
   reclaim thread and make us wait for it to release enough space and
   unblock our reservation ticket. The reclaim thread can start flushing
   delayed items, and that in turn results in the need to lock delayed
   node mutexes and in the need to write lock extent buffers of a
   subvolume tree - all this while holding a write lock on the parent
   extent buffer in the log tree.

So one task in scenario 1) running in parallel with another task in
scenario 2) could lead to a deadlock, one wanting to lock a delayed node
mutex while having a read lock on a leaf from the subvolume, while the
other is holding the delayed node's mutex and wants to write lock the same
subvolume leaf for flushing delayed items.

Fix this by cloning the leaf of the fs/subvolume tree, release/unlock the
fs/subvolume leaf and use the clone leaf instead.

Reported-by: syzbot+9b7c21f486f5e7f8d029@syzkaller.appspotmail.com
Link: https://lore.kernel.org/linux-btrfs/000000000000ccc93c05edc4d8cf@google.com/
CC: stable@vger.kernel.org # 6.0+
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
23 months agobtrfs: use kvcalloc in btrfs_get_dev_zone_info
Christoph Hellwig [Sun, 20 Nov 2022 12:43:03 +0000 (13:43 +0100)]
btrfs: use kvcalloc in btrfs_get_dev_zone_info

Otherwise the kernel memory allocator seems to be unhappy about failing
order 6 allocations for the zones array, that cause 100% reproducible
mount failures in my qemu setup:

  [26.078981] mount: page allocation failure: order:6, mode:0x40dc0(GFP_KERNEL|__GFP_COMP|__GFP_ZERO), nodemask=(null)
  [26.079741] CPU: 0 PID: 2965 Comm: mount Not tainted 6.1.0-rc5+ #185
  [26.080181] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
  [26.080950] Call Trace:
  [26.081132]  <TASK>
  [26.081291]  dump_stack_lvl+0x56/0x6f
  [26.081554]  warn_alloc+0x117/0x140
  [26.081808]  ? __alloc_pages_direct_compact+0x1b5/0x300
  [26.082174]  __alloc_pages_slowpath.constprop.0+0xd0e/0xde0
  [26.082569]  __alloc_pages+0x32a/0x340
  [26.082836]  __kmalloc_large_node+0x4d/0xa0
  [26.083133]  ? trace_kmalloc+0x29/0xd0
  [26.083399]  kmalloc_large+0x14/0x60
  [26.083654]  btrfs_get_dev_zone_info+0x1b9/0xc00
  [26.083980]  ? _raw_spin_unlock_irqrestore+0x28/0x50
  [26.084328]  btrfs_get_dev_zone_info_all_devices+0x54/0x80
  [26.084708]  open_ctree+0xed4/0x1654
  [26.084974]  btrfs_mount_root.cold+0x12/0xde
  [26.085288]  ? lock_is_held_type+0xe2/0x140
  [26.085603]  legacy_get_tree+0x28/0x50
  [26.085876]  vfs_get_tree+0x1d/0xb0
  [26.086139]  vfs_kern_mount.part.0+0x6c/0xb0
  [26.086456]  btrfs_mount+0x118/0x3a0
  [26.086728]  ? lock_is_held_type+0xe2/0x140
  [26.087043]  legacy_get_tree+0x28/0x50
  [26.087323]  vfs_get_tree+0x1d/0xb0
  [26.087587]  path_mount+0x2ba/0xbe0
  [26.087850]  ? _raw_spin_unlock_irqrestore+0x38/0x50
  [26.088217]  __x64_sys_mount+0xfe/0x140
  [26.088506]  do_syscall_64+0x35/0x80
  [26.088776]  entry_SYSCALL_64_after_hwframe+0x63/0xcd

Fixes: 5b316468983d ("btrfs: get zone information of zoned block devices")
CC: stable@vger.kernel.org # 5.15+
Reviewed-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
23 months agos390/ap: fix memory leak in ap_init_qci_info()
Wei Yongjun [Mon, 14 Nov 2022 11:08:29 +0000 (11:08 +0000)]
s390/ap: fix memory leak in ap_init_qci_info()

If kzalloc() for 'ap_qci_info_old' failed, 'ap_qci_info' shold be
freed before return. Otherwise it is a memory leak.

Link: https://lore.kernel.org/r/20221114110830.542246-1-weiyongjun@huaweicloud.com
Fixes: 283915850a44 ("s390/ap: notify drivers on config changed and scan complete callbacks")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
23 months agodrm/amdgpu/vcn: re-use original vcn0 doorbell value
Jane Jian [Wed, 16 Nov 2022 10:22:52 +0000 (18:22 +0800)]
drm/amdgpu/vcn: re-use original vcn0 doorbell value

root cause that S2A need to use deduct offset flag.
after setting this flag, vcn0 doorbell value works.
so return it as before

Signed-off-by: Jane Jian <Jane.Jian@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
23 months agodrm/amdgpu: Partially revert "drm/amdgpu: update drm_display_info correctly when...
Alex Deucher [Mon, 21 Nov 2022 17:34:14 +0000 (12:34 -0500)]
drm/amdgpu: Partially revert "drm/amdgpu: update drm_display_info correctly when the edid is read"

This partially reverts 20543be93ca45968f344261c1a997177e51bd7e1.

Calling drm_connector_update_edid_property() in
amdgpu_connector_free_edid() causes a noticeable pause in
the system every 10 seconds on polled outputs so revert this
part of the change.

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/2257
Cc: Claudio Suarez <cssk@net-c.es>
Acked-by: Luben Tuikov <luben.tuikov@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
23 months agodrm/amd/display: No display after resume from WB/CB
Tsung-hua Lin [Wed, 9 Nov 2022 04:54:22 +0000 (12:54 +0800)]
drm/amd/display: No display after resume from WB/CB

[why]
First MST sideband message returns AUX_RET_ERROR_HPD_DISCON
on certain intel platform. Aux transaction considered failure
if HPD unexpected pulled low. The actual aux transaction success
in such case, hence do not return error.

[how]
Not returning error when AUX_RET_ERROR_HPD_DISCON detected
on the first sideband message.

v2: squash in fix (Alex)

Reviewed-by: Jerry Zuo <Jerry.Zuo@amd.com>
Acked-by: Brian Chang <Brian.Chang@amd.com>
Signed-off-by: Tsung-hua Lin <Tsung-hua.Lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
23 months agodrm/amdgpu: fix use-after-free during gpu recovery
Stanley.Yang [Wed, 16 Nov 2022 09:08:22 +0000 (17:08 +0800)]
drm/amdgpu: fix use-after-free during gpu recovery

[Why]
    [  754.862560] refcount_t: underflow; use-after-free.
    [  754.862898] Call Trace:
    [  754.862903]  <TASK>
    [  754.862913]  amdgpu_job_free_cb+0xc2/0xe1 [amdgpu]
    [  754.863543]  drm_sched_main.cold+0x34/0x39 [amd_sched]

[How]
    The fw_fence may be not init, check whether dma_fence_init
    is performed before job free

Signed-off-by: Stanley.Yang <Stanley.Yang@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
23 months agodrm/amd/pm: update driver if header for smu_13_0_7
lyndonli [Mon, 21 Nov 2022 01:08:42 +0000 (09:08 +0800)]
drm/amd/pm: update driver if header for smu_13_0_7

update driver if header for smu_13_0_7

Signed-off-by: lyndonli <Lyndon.Li@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.0.x
23 months agodrm/amd/display: Fix rotated cursor offset calculation
David Galiffi [Thu, 10 Nov 2022 19:40:20 +0000 (14:40 -0500)]
drm/amd/display: Fix rotated cursor offset calculation

[Why]
Underflow is observed when cursor is still enabled when the cursor
rectangle is outside the bounds of it's surface viewport.

[How]
Update parameters used to determine when cursor should be disabled.

Reviewed-by: Martin Leung <Martin.Leung@amd.com>
Acked-by: Brian Chang <Brian.Chang@amd.com>
Signed-off-by: David Galiffi <David.Galiffi@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
23 months agodrm/amd/display: Use new num clk levels struct for max mclk index
Dillon Varone [Fri, 11 Nov 2022 19:06:58 +0000 (14:06 -0500)]
drm/amd/display: Use new num clk levels struct for max mclk index

[WHY?]
When calculating watermark and dlg values, the max mclk level index and
associated speed are needed to find the correlated dummy latency value.
Currently the incorrect index is given due to a clock manager refactor.

[HOW?]
Use num_memclk_level from num_entries_per_clk struct for getting the correct max
mem speed.

Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Brian Chang <Brian.Chang@amd.com>
Signed-off-by: Dillon Varone <Dillon.Varone@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
23 months agodrm/amd/display: Avoid setting pixel rate divider to N/A
Taimur Hassan [Fri, 11 Nov 2022 19:11:00 +0000 (14:11 -0500)]
drm/amd/display: Avoid setting pixel rate divider to N/A

[Why]
Pixel rate divider values should never be set to N/A (0xF) as the K1/K2
field is only 1/2 bits wide.

[How]
Set valid divider values for virtual and FRL/DP2 cases.

Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Brian Chang <Brian.Chang@amd.com>
Signed-off-by: Taimur Hassan <Syed.Hassan@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
23 months agodrm/amd/display: Use viewport height for subvp mall allocation size
Dillon Varone [Thu, 10 Nov 2022 17:13:47 +0000 (12:13 -0500)]
drm/amd/display: Use viewport height for subvp mall allocation size

[WHY?]
MALL allocation size depends on the viewport height, not the addressable
vertical lines, which will not match when scaling.

[HOW?]
Base MALL allocation size calculations off viewport height.

Reviewed-by: Alvin Lee <Alvin.Lee2@amd.com>
Reviewed-by: Martin Leung <Martin.Leung@amd.com>
Acked-by: Brian Chang <Brian.Chang@amd.com>
Signed-off-by: Dillon Varone <Dillon.Varone@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
23 months agodrm/amd/display: Update soc bounding box for dcn32/dcn321
Dillon Varone [Mon, 7 Nov 2022 20:18:47 +0000 (15:18 -0500)]
drm/amd/display: Update soc bounding box for dcn32/dcn321

[Description]
New values for soc bounding box and dummy pstate.

Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Brian Chang <Brian.Chang@amd.com>
Signed-off-by: Dillon Varone <Dillon.Varone@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 6.0.x
23 months agodrm/amd/dc/dce120: Fix audio register mapping, stop triggering KASAN
Lyude Paul [Mon, 14 Nov 2022 22:20:45 +0000 (17:20 -0500)]
drm/amd/dc/dce120: Fix audio register mapping, stop triggering KASAN

There's been a very long running bug that seems to have been neglected for
a while, where amdgpu consistently triggers a KASAN error at start:

  BUG: KASAN: global-out-of-bounds in read_indirect_azalia_reg+0x1d4/0x2a0 [amdgpu]
  Read of size 4 at addr ffffffffc2274b28 by task modprobe/1889

After digging through amd's rather creative method for accessing registers,
I eventually discovered the problem likely has to do with the fact that on
my dce120 GPU there are supposedly 7 sets of audio registers. But we only
define a register mapping for 6 sets.

So, fix this and fix the KASAN warning finally.

Signed-off-by: Lyude Paul <lyude@redhat.com>
Cc: stable@vger.kernel.org
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
23 months agodrm/amdgpu/psp: don't free PSP buffers on suspend
Alex Deucher [Wed, 16 Nov 2022 16:26:53 +0000 (11:26 -0500)]
drm/amdgpu/psp: don't free PSP buffers on suspend

We can reuse the same buffers on resume.

v2: squash in S4 fix from Shikai

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/2213
Reviewed-by: Christian König <christian.koenig@amd.com>
Tested-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
23 months agonet/cdc_ncm: Fix multicast RX support for CDC NCM devices with ZLP
Santiago Ruano Rincón [Mon, 21 Nov 2022 20:53:05 +0000 (21:53 +0100)]
net/cdc_ncm: Fix multicast RX support for CDC NCM devices with ZLP

ZLP for DisplayLink ethernet devices was enabled in 6.0:
266c0190aee3 ("net/cdc_ncm: Enable ZLP for DisplayLink ethernet devices").
The related driver_info should be the "same as cdc_ncm_info, but with
FLAG_SEND_ZLP". However, set_rx_mode that enables handling multicast
traffic was missing in the new cdc_ncm_zlp_info.

usbnet_cdc_update_filter rx mode was introduced in linux 5.9 with:
e10dcb1b6ba7 ("net: cdc_ncm: hook into set_rx_mode to admit multicast
traffic")

Without this hook, multicast, and then IPv6 SLAAC, is broken.

Fixes: 266c0190aee3 ("net/cdc_ncm: Enable ZLP for DisplayLink ethernet devices")
Signed-off-by: Santiago Ruano Rincón <santiago.ruano-rincon@imt-atlantique.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
23 months agonet: usb: qmi_wwan: add u-blox 0x1342 composition
Davide Tronchin [Mon, 21 Nov 2022 12:54:55 +0000 (13:54 +0100)]
net: usb: qmi_wwan: add u-blox 0x1342 composition

Add RmNet support for LARA-L6.

LARA-L6 module can be configured (by AT interface) in three different
USB modes:
* Default mode (Vendor ID: 0x1546 Product ID: 0x1341) with 4 serial
interfaces
* RmNet mode (Vendor ID: 0x1546 Product ID: 0x1342) with 4 serial
interfaces and 1 RmNet virtual network interface
* CDC-ECM mode (Vendor ID: 0x1546 Product ID: 0x1343) with 4 serial
interface and 1 CDC-ECM virtual network interface

In RmNet mode LARA-L6 exposes the following interfaces:
If 0: Diagnostic
If 1: AT parser
If 2: AT parser
If 3: AT parset/alternative functions
If 4: RMNET interface

Signed-off-by: Davide Tronchin <davide.tronchin.94@gmail.com>
Acked-by: Bjørn Mork <bjorn@mork.no>
Signed-off-by: David S. Miller <davem@davemloft.net>
23 months agol2tp: Don't sleep and disable BH under writer-side sk_callback_lock
Jakub Sitnicki [Mon, 21 Nov 2022 08:54:26 +0000 (09:54 +0100)]
l2tp: Don't sleep and disable BH under writer-side sk_callback_lock

When holding a reader-writer spin lock we cannot sleep. Calling
setup_udp_tunnel_sock() with write lock held violates this rule, because we
end up calling percpu_down_read(), which might sleep, as syzbot reports
[1]:

 __might_resched.cold+0x222/0x26b kernel/sched/core.c:9890
 percpu_down_read include/linux/percpu-rwsem.h:49 [inline]
 cpus_read_lock+0x1b/0x140 kernel/cpu.c:310
 static_key_slow_inc+0x12/0x20 kernel/jump_label.c:158
 udp_tunnel_encap_enable include/net/udp_tunnel.h:187 [inline]
 setup_udp_tunnel_sock+0x43d/0x550 net/ipv4/udp_tunnel_core.c:81
 l2tp_tunnel_register+0xc51/0x1210 net/l2tp/l2tp_core.c:1509
 pppol2tp_connect+0xcdc/0x1a10 net/l2tp/l2tp_ppp.c:723

Trim the writer-side critical section for sk_callback_lock down to the
minimum, so that it covers only operations on sk_user_data.

Also, when grabbing the sk_callback_lock, we always need to disable BH, as
Eric points out. Failing to do so leads to deadlocks because we acquire
sk_callback_lock in softirq context, which can get stuck waiting on us if:

1) it runs on the same CPU, or

       CPU0
       ----
  lock(clock-AF_INET6);
  <Interrupt>
    lock(clock-AF_INET6);

2) lock ordering leads to priority inversion

       CPU0                    CPU1
       ----                    ----
  lock(clock-AF_INET6);
                               local_irq_disable();
                               lock(&tcp_hashinfo.bhash[i].lock);
                               lock(clock-AF_INET6);
  <Interrupt>
    lock(&tcp_hashinfo.bhash[i].lock);

... as syzbot reports [2,3]. Use the _bh variants for write_(un)lock.

[1] https://lore.kernel.org/netdev/0000000000004e78ec05eda79749@google.com/
[2] https://lore.kernel.org/netdev/000000000000e38b6605eda76f98@google.com/
[3] https://lore.kernel.org/netdev/000000000000dfa31e05eda76f75@google.com/

v2:
- Check and set sk_user_data while holding sk_callback_lock for both
  L2TP encapsulation types (IP and UDP) (Tetsuo)

Cc: Tom Parkin <tparkin@katalix.com>
Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Fixes: b68777d54fac ("l2tp: Serialize access to sk_user_data with sk_callback_lock")
Reported-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot+703d9e154b3b58277261@syzkaller.appspotmail.com
Reported-by: syzbot+50680ced9e98a61f7698@syzkaller.appspotmail.com
Reported-by: syzbot+de987172bb74a381879b@syzkaller.appspotmail.com
Signed-off-by: Jakub Sitnicki <jakub@cloudflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>