platform/kernel/linux-starfive.git
4 years agoselftests: add clone3() CAP_CHECKPOINT_RESTORE test
Adrian Reber [Sun, 19 Jul 2020 10:04:17 +0000 (12:04 +0200)]
selftests: add clone3() CAP_CHECKPOINT_RESTORE test

This adds a test that changes its UID, uses capabilities to
get CAP_CHECKPOINT_RESTORE and uses clone3() with set_tid to
create a process with a given PID as non-root.

Signed-off-by: Adrian Reber <areber@redhat.com>
Link: https://lore.kernel.org/r/20200719100418.2112740-8-areber@redhat.com
[christian.brauner@ubuntu.com: use TH_LOG() instead of ksft_print_msg()]
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
4 years agoprctl: exe link permission error changed from -EINVAL to -EPERM
Nicolas Viennot [Sun, 19 Jul 2020 10:04:16 +0000 (12:04 +0200)]
prctl: exe link permission error changed from -EINVAL to -EPERM

This brings consistency with the rest of the prctl() syscall where
-EPERM is returned when failing a capability check.

Signed-off-by: Nicolas Viennot <Nicolas.Viennot@twosigma.com>
Signed-off-by: Adrian Reber <areber@redhat.com>
Reviewed-by: Serge Hallyn <serge@hallyn.com>
Link: https://lore.kernel.org/r/20200719100418.2112740-7-areber@redhat.com
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
4 years agoprctl: Allow local CAP_CHECKPOINT_RESTORE to change /proc/self/exe
Nicolas Viennot [Sun, 19 Jul 2020 10:04:15 +0000 (12:04 +0200)]
prctl: Allow local CAP_CHECKPOINT_RESTORE to change /proc/self/exe

Originally, only a local CAP_SYS_ADMIN could change the exe link,
making it difficult for doing checkpoint/restore without CAP_SYS_ADMIN.
This commit adds CAP_CHECKPOINT_RESTORE in addition to CAP_SYS_ADMIN
for permitting changing the exe link.

The following describes the history of the /proc/self/exe permission
checks as it may be difficult to understand what decisions lead to this
point.

* [1] May 2012: This commit introduces the ability of changing
  /proc/self/exe if the user is CAP_SYS_RESOURCE capable.
  In the related discussion [2], no clear thread model is presented for
  what could happen if the /proc/self/exe changes multiple times, or why
  would the admin be at the mercy of userspace.

* [3] Oct 2014: This commit introduces a new API to change
  /proc/self/exe. The permission no longer checks for CAP_SYS_RESOURCE,
  but instead checks if the current user is root (uid=0) in its local
  namespace. In the related discussion [4] it is said that "Controlling
  exe_fd without privileges may turn out to be dangerous. At least
  things like tomoyo examine it for making policy decisions (see
  tomoyo_manager())."

* [5] Dec 2016: This commit removes the restriction to change
  /proc/self/exe at most once. The related discussion [6] informs that
  the audit subsystem relies on the exe symlink, presumably
  audit_log_d_path_exe() in kernel/audit.c.

* [7] May 2017: This commit changed the check from uid==0 to local
  CAP_SYS_ADMIN. No discussion.

* [8] July 2020: A PoC to spoof any program's /proc/self/exe via ptrace
  is demonstrated

Overall, the concrete points that were made to retain capability checks
around changing the exe symlink is that tomoyo_manager() and
audit_log_d_path_exe() uses the exe_file path.

Christian Brauner said that relying on /proc/<pid>/exe being immutable (or
guarded by caps) in a sake of security is a bit misleading. It can only
be used as a hint without any guarantees of what code is being executed
once execve() returns to userspace. Christian suggested that in the
future, we could call audit_log() or similar to inform the admin of all
exe link changes, instead of attempting to provide security guarantees
via permission checks. However, this proposed change requires the
understanding of the security implications in the tomoyo/audit subsystems.

[1] b32dfe377102 ("c/r: prctl: add ability to set new mm_struct::exe_file")
[2] https://lore.kernel.org/patchwork/patch/292515/
[3] f606b77f1a9e ("prctl: PR_SET_MM -- introduce PR_SET_MM_MAP operation")
[4] https://lore.kernel.org/patchwork/patch/479359/
[5] 3fb4afd9a504 ("prctl: remove one-shot limitation for changing exe link")
[6] https://lore.kernel.org/patchwork/patch/697304/
[7] 4d28df6152aa ("prctl: Allow local CAP_SYS_ADMIN changing exe_file")
[8] https://github.com/nviennot/run_as_exe

Signed-off-by: Nicolas Viennot <Nicolas.Viennot@twosigma.com>
Signed-off-by: Adrian Reber <areber@redhat.com>
Link: https://lore.kernel.org/r/20200719100418.2112740-6-areber@redhat.com
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
4 years agoproc: allow access in init userns for map_files with CAP_CHECKPOINT_RESTORE
Adrian Reber [Sun, 19 Jul 2020 10:04:14 +0000 (12:04 +0200)]
proc: allow access in init userns for map_files with CAP_CHECKPOINT_RESTORE

Opening files in /proc/pid/map_files when the current user is
CAP_CHECKPOINT_RESTORE capable in the root namespace is useful for
checkpointing and restoring to recover files that are unreachable via
the file system such as deleted files, or memfd files.

Signed-off-by: Adrian Reber <areber@redhat.com>
Signed-off-by: Nicolas Viennot <Nicolas.Viennot@twosigma.com>
Reviewed-by: Cyrill Gorcunov <gorcunov@gmail.com>
Reviewed-by: Serge Hallyn <serge@hallyn.com>
Link: https://lore.kernel.org/r/20200719100418.2112740-5-areber@redhat.com
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
4 years agopid_namespace: use checkpoint_restore_ns_capable() for ns_last_pid
Adrian Reber [Sun, 19 Jul 2020 10:04:13 +0000 (12:04 +0200)]
pid_namespace: use checkpoint_restore_ns_capable() for ns_last_pid

Use the newly introduced capability CAP_CHECKPOINT_RESTORE to allow
writing to ns_last_pid.

Signed-off-by: Adrian Reber <areber@redhat.com>
Signed-off-by: Nicolas Viennot <Nicolas.Viennot@twosigma.com>
Reviewed-by: Serge Hallyn <serge@hallyn.com>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Link: https://lore.kernel.org/r/20200719100418.2112740-4-areber@redhat.com
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
4 years agopid: use checkpoint_restore_ns_capable() for set_tid
Adrian Reber [Sun, 19 Jul 2020 10:04:12 +0000 (12:04 +0200)]
pid: use checkpoint_restore_ns_capable() for set_tid

Use the newly introduced capability CAP_CHECKPOINT_RESTORE to allow
using clone3() with set_tid set.

Signed-off-by: Adrian Reber <areber@redhat.com>
Signed-off-by: Nicolas Viennot <Nicolas.Viennot@twosigma.com>
Reviewed-by: Serge Hallyn <serge@hallyn.com>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Link: https://lore.kernel.org/r/20200719100418.2112740-3-areber@redhat.com
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
4 years agocapabilities: Introduce CAP_CHECKPOINT_RESTORE
Adrian Reber [Sun, 19 Jul 2020 10:04:11 +0000 (12:04 +0200)]
capabilities: Introduce CAP_CHECKPOINT_RESTORE

This patch introduces CAP_CHECKPOINT_RESTORE, a new capability facilitating
checkpoint/restore for non-root users.

Over the last years, The CRIU (Checkpoint/Restore In Userspace) team has
been asked numerous times if it is possible to checkpoint/restore a
process as non-root. The answer usually was: 'almost'.

The main blocker to restore a process as non-root was to control the PID
of the restored process. This feature available via the clone3 system
call, or via /proc/sys/kernel/ns_last_pid is unfortunately guarded by
CAP_SYS_ADMIN.

In the past two years, requests for non-root checkpoint/restore have
increased due to the following use cases:
* Checkpoint/Restore in an HPC environment in combination with a
  resource manager distributing jobs where users are always running as
  non-root. There is a desire to provide a way to checkpoint and
  restore long running jobs.
* Container migration as non-root
* We have been in contact with JVM developers who are integrating
  CRIU into a Java VM to decrease the startup time. These
  checkpoint/restore applications are not meant to be running with
  CAP_SYS_ADMIN.

We have seen the following workarounds:
* Use a setuid wrapper around CRIU:
  See https://github.com/FredHutch/slurm-examples/blob/master/checkpointer/lib/checkpointer/checkpointer-suid.c
* Use a setuid helper that writes to ns_last_pid.
  Unfortunately, this helper delegation technique is impossible to use
  with clone3, and is thus prone to races.
  See https://github.com/twosigma/set_ns_last_pid
* Cycle through PIDs with fork() until the desired PID is reached:
  This has been demonstrated to work with cycling rates of 100,000 PIDs/s
  See https://github.com/twosigma/set_ns_last_pid
* Patch out the CAP_SYS_ADMIN check from the kernel
* Run the desired application in a new user and PID namespace to provide
  a local CAP_SYS_ADMIN for controlling PIDs. This technique has limited
  use in typical container environments (e.g., Kubernetes) as /proc is
  typically protected with read-only layers (e.g., /proc/sys) for
  hardening purposes. Read-only layers prevent additional /proc mounts
  (due to proc's SB_I_USERNS_VISIBLE property), making the use of new
  PID namespaces limited as certain applications need access to /proc
  matching their PID namespace.

The introduced capability allows to:
* Control PIDs when the current user is CAP_CHECKPOINT_RESTORE capable
  for the corresponding PID namespace via ns_last_pid/clone3.
* Open files in /proc/pid/map_files when the current user is
  CAP_CHECKPOINT_RESTORE capable in the root namespace, useful for
  recovering files that are unreachable via the file system such as
  deleted files, or memfd files.

See corresponding selftest for an example with clone3().

Signed-off-by: Adrian Reber <areber@redhat.com>
Signed-off-by: Nicolas Viennot <Nicolas.Viennot@twosigma.com>
Reviewed-by: Serge Hallyn <serge@hallyn.com>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Link: https://lore.kernel.org/r/20200719100418.2112740-2-areber@redhat.com
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
4 years agoLinux 5.8-rc5
Linus Torvalds [Sun, 12 Jul 2020 23:34:50 +0000 (16:34 -0700)]
Linux 5.8-rc5

4 years agoMerge tag 'xtensa-20200712' of git://github.com/jcmvbkbc/linux-xtensa
Linus Torvalds [Sun, 12 Jul 2020 20:29:07 +0000 (13:29 -0700)]
Merge tag 'xtensa-20200712' of git://github.com/jcmvbkbc/linux-xtensa

Pull Xtensa fixes from Max Filippov:

 - fix __sync_fetch_and_{and,or}_4 declarations to avoid build warning

 - update *pos in cpuinfo_op.next to avoid runtime warning

 - use for_each_set_bit in xtensa_pmu_irq_handler instead of open-coding
   it

* tag 'xtensa-20200712' of git://github.com/jcmvbkbc/linux-xtensa:
  xtensa: simplify xtensa_pmu_irq_handler
  xtensa: update *pos in cpuinfo_op.next
  xtensa: fix __sync_fetch_and_{and,or}_4 declarations

4 years agoMerge tag 'io_uring-5.8-2020-07-12' of git://git.kernel.dk/linux-block
Linus Torvalds [Sun, 12 Jul 2020 19:17:58 +0000 (12:17 -0700)]
Merge tag 'io_uring-5.8-2020-07-12' of git://git.kernel.dk/linux-block

Pull io_uring fixes from Jens Axboe:
 "Two late fixes again:

   - Fix missing msg_name assignment in certain cases (Pavel)

   - Correct a previous fix for full coverage (Pavel)"

* tag 'io_uring-5.8-2020-07-12' of git://git.kernel.dk/linux-block:
  io_uring: fix not initialised work->flags
  io_uring: fix missing msg_name assignment

4 years agoMerge tag 'for-5.8-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
Linus Torvalds [Sun, 12 Jul 2020 17:58:35 +0000 (10:58 -0700)]
Merge tag 'for-5.8-rc4-tag' of git://git./linux/kernel/git/kdave/linux

Pull btrfs fixes from David Sterba:
 "Two refcounting fixes and one prepartory patch for upcoming splice
  cleanup:

   - fix double put of block group with nodatacow

   - fix missing block group put when remounting with discard=async

   - explicitly set splice callback (no functional change), to ease
     integrating splice cleanup patches"

* tag 'for-5.8-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: wire up iter_file_splice_write
  btrfs: fix double put of block group with nocow
  btrfs: discard: add missing put when grabbing block group from unused list

4 years agoio_uring: fix not initialised work->flags
Pavel Begunkov [Sun, 12 Jul 2020 13:16:47 +0000 (16:16 +0300)]
io_uring: fix not initialised work->flags

59960b9deb535 ("io_uring: fix lazy work init") tried to fix missing
io_req_init_async(), but left out work.flags and hash. Do it earlier.

Fixes: 7cdaf587de7c ("io_uring: avoid whole io_wq_work copy for requests completed inline")
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
4 years agoio_uring: fix missing msg_name assignment
Pavel Begunkov [Sun, 12 Jul 2020 10:23:08 +0000 (13:23 +0300)]
io_uring: fix missing msg_name assignment

Ensure to set msg.msg_name for the async portion of send/recvmsg,
as the header copy will copy to/from it.

Cc: stable@vger.kernel.org # v5.5+
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
4 years agoMerge tag 'riscv-for-linus-5.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sun, 12 Jul 2020 02:22:46 +0000 (19:22 -0700)]
Merge tag 'riscv-for-linus-5.8-rc5' of git://git./linux/kernel/git/riscv/linux

Pull RISC-V fixes from Palmer Dabbelt:
 "I have a few KGDB-related fixes. They're mostly fixes for build
  warnings, but there's also:

   - Support for the qSupported and qXfer packets, which are necessary
     to pass around GDB XML information which we need for the RISC-V GDB
     port to fully function.

   - Users can now select STRICT_KERNEL_RWX instead of forcing it on"

* tag 'riscv-for-linus-5.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  riscv: Avoid kgdb.h including gdb_xml.h to solve unused-const-variable warning
  kgdb: Move the extern declaration kgdb_has_hit_break() to generic kgdb.h
  riscv: Fix "no previous prototype" compile warning in kgdb.c file
  riscv: enable the Kconfig prompt of STRICT_KERNEL_RWX
  kgdb: enable arch to support XML packet.

4 years agoMerge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Linus Torvalds [Sun, 12 Jul 2020 01:15:17 +0000 (18:15 -0700)]
Merge tag 'scsi-fixes' of git://git./linux/kernel/git/jejb/scsi

Pull SCSI fixes from James Bottomley:
 "Five small fixes, four in driver and one in the SCSI Parallel
  transport, which fixes an incredibly old bug so I suspect no-one has
  actually used the functionality it fixes"

* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
  scsi: dh: Add Fujitsu device to devinfo and dh lists
  scsi: mpt3sas: Fix error returns in BRM_status_show
  scsi: mpt3sas: Fix unlock imbalance
  scsi: iscsi: Change iSCSI workqueue max_active back to 1
  scsi: scsi_transport_spi: Fix function pointer check

4 years agoMerge tag 'for-linus-5.8b-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 11 Jul 2020 18:16:46 +0000 (11:16 -0700)]
Merge tag 'for-linus-5.8b-rc5-tag' of git://git./linux/kernel/git/xen/tip

Pull xen fix from Juergen Gross:
 "Just one fix of a recent patch (double free in an error path)"

* tag 'for-linus-5.8b-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  xen/xenbus: Fix a double free in xenbus_map_ring_pv()

4 years agoMerge tag 'powerpc-5.8-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Sat, 11 Jul 2020 17:24:38 +0000 (10:24 -0700)]
Merge tag 'powerpc-5.8-6' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fix from Michael Ellerman:
 "One fix for a crash/soft lockup on Power8, caused by the exception
  rework we did in v5.7.

  Thanks to Paul Menzel and Nicholas Piggin"

* tag 'powerpc-5.8-6' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/64s/exception: Fix 0x1500 interrupt handler crash

4 years agoMerge tag 'libnvdimm-fix-v5.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 11 Jul 2020 04:23:10 +0000 (21:23 -0700)]
Merge tag 'libnvdimm-fix-v5.8-rc5' of git://git./linux/kernel/git/nvdimm/nvdimm

Pull libnvdimm fix from Dan Williams:
 "A one-line Fix for key ring search permissions to address a regression
  from -rc1"

* tag 'libnvdimm-fix-v5.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
  libnvdimm/security: Fix key lookup permissions

4 years agoMerge tag '5.8-rc4-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Sat, 11 Jul 2020 04:16:48 +0000 (21:16 -0700)]
Merge tag '5.8-rc4-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "Four cifs/smb3 fixes: the three for stable fix problems found recently
  with change notification including a reference count leak"

* tag '5.8-rc4-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: update internal module version number
  cifs: fix reference leak for tlink
  smb3: fix unneeded error message on change notify
  cifs: remove the retry in cifs_poxis_lock_set
  smb3: fix access denied on change notify request to some servers

4 years agoMerge tag 'inclusive-terminology' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 11 Jul 2020 04:15:25 +0000 (21:15 -0700)]
Merge tag 'inclusive-terminology' of git://git./linux/kernel/git/djbw/linux

Pull coding style terminology documentation from Dan Williams:
 "The discussion has tapered off as well as the incoming ack, review,
  and sign-off tags. I did not see a reason to wait for the next merge
  window"

* tag 'inclusive-terminology' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/linux:
  CodingStyle: Inclusive Terminology

4 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Sat, 11 Jul 2020 01:16:22 +0000 (18:16 -0700)]
Merge git://git./linux/kernel/git/netdev/net

Pull networking fixes from David Miller:

 1) Restore previous behavior of CAP_SYS_ADMIN wrt loading networking
    BPF programs, from Maciej Żenczykowski.

 2) Fix dropped broadcasts in mac80211 code, from Seevalamuthu
    Mariappan.

 3) Slay memory leak in nl80211 bss color attribute parsing code, from
    Luca Coelho.

 4) Get route from skb properly in ip_route_use_hint(), from Miaohe Lin.

 5) Don't allow anything other than ARPHRD_ETHER in llc code, from Eric
    Dumazet.

 6) xsk code dips too deeply into DMA mapping implementation internals.
    Add dma_need_sync and use it. From Christoph Hellwig

 7) Enforce power-of-2 for BPF ringbuf sizes. From Andrii Nakryiko.

 8) Check for disallowed attributes when loading flow dissector BPF
    programs. From Lorenz Bauer.

 9) Correct packet injection to L3 tunnel devices via AF_PACKET, from
    Jason A. Donenfeld.

10) Don't advertise checksum offload on ipa devices that don't support
    it. From Alex Elder.

11) Resolve several issues in TCP MD5 signature support. Missing memory
    barriers, bogus options emitted when using syncookies, and failure
    to allow md5 key changes in established states. All from Eric
    Dumazet.

12) Fix interface leak in hsr code, from Taehee Yoo.

13) VF reset fixes in hns3 driver, from Huazhong Tan.

14) Make loopback work again with ipv6 anycast, from David Ahern.

15) Fix TX starvation under high load in fec driver, from Tobias
    Waldekranz.

16) MLD2 payload lengths not checked properly in bridge multicast code,
    from Linus Lüssing.

17) Packet scheduler code that wants to find the inner protocol
    currently only works for one level of VLAN encapsulation. Allow
    Q-in-Q situations to work properly here, from Toke
    Høiland-Jørgensen.

18) Fix route leak in l2tp, from Xin Long.

19) Resolve conflict between the sk->sk_user_data usage of bpf reuseport
    support and various protocols. From Martin KaFai Lau.

20) Fix socket cgroup v2 reference counting in some situations, from
    Cong Wang.

21) Cure memory leak in mlx5 connection tracking offload support, from
    Eli Britstein.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (146 commits)
  mlxsw: pci: Fix use-after-free in case of failed devlink reload
  mlxsw: spectrum_router: Remove inappropriate usage of WARN_ON()
  net: macb: fix call to pm_runtime in the suspend/resume functions
  net: macb: fix macb_suspend() by removing call to netif_carrier_off()
  net: macb: fix macb_get/set_wol() when moving to phylink
  net: macb: mark device wake capable when "magic-packet" property present
  net: macb: fix wakeup test in runtime suspend/resume routines
  bnxt_en: fix NULL dereference in case SR-IOV configuration fails
  libbpf: Fix libbpf hashmap on (I)LP32 architectures
  net/mlx5e: CT: Fix memory leak in cleanup
  net/mlx5e: Fix port buffers cell size value
  net/mlx5e: Fix 50G per lane indication
  net/mlx5e: Fix CPU mapping after function reload to avoid aRFS RX crash
  net/mlx5e: Fix VXLAN configuration restore after function reload
  net/mlx5e: Fix usage of rcu-protected pointer
  net/mxl5e: Verify that rpriv is not NULL
  net/mlx5: E-Switch, Fix vlan or qos setting in legacy mode
  net/mlx5: Fix eeprom support for SFP module
  cgroup: Fix sock_cgroup_data on big-endian.
  selftests: bpf: Fix detach from sockmap tests
  ...

4 years agomips: Remove compiler check in unroll macro
Nathan Chancellor [Fri, 10 Jul 2020 22:34:41 +0000 (15:34 -0700)]
mips: Remove compiler check in unroll macro

CONFIG_CC_IS_GCC is undefined when Clang is used, which breaks the build
(see our Travis link below).

Clang 8 was chosen as a minimum version for this check because there
were some improvements around __builtin_constant_p in that release. In
reality, MIPS was not even buildable until clang 9 so that check was not
technically necessary. Just remove all compiler checks and just assume
that we have a working compiler.

Fixes: d4e60453266b ("Restore gcc check in mips asm/unroll.h")
Link: https://travis-ci.com/github/ClangBuiltLinux/continuous-integration/jobs/359642821
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
4 years agoMerge branch 'mlxsw-Various-fixes'
David S. Miller [Fri, 10 Jul 2020 21:33:34 +0000 (14:33 -0700)]
Merge branch 'mlxsw-Various-fixes'

Ido Schimmel says:

====================
mlxsw: Various fixes

Fix two issues found by syzkaller.

Patch #1 removes inappropriate usage of WARN_ON() following memory
allocation failure. Constantly triggered when syzkaller injects faults.

Patch #2 fixes a use-after-free that can be triggered by 'devlink dev
info' following a failed devlink reload.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlxsw: pci: Fix use-after-free in case of failed devlink reload
Ido Schimmel [Fri, 10 Jul 2020 13:41:39 +0000 (16:41 +0300)]
mlxsw: pci: Fix use-after-free in case of failed devlink reload

In case devlink reload failed, it is possible to trigger a
use-after-free when querying the kernel for device info via 'devlink dev
info' [1].

This happens because as part of the reload error path the PCI command
interface is de-initialized and its mailboxes are freed. When the
devlink '->info_get()' callback is invoked the device is queried via the
command interface and the freed mailboxes are accessed.

Fix this by initializing the command interface once during probe and not
during every reload.

This is consistent with the other bus used by mlxsw (i.e., 'mlxsw_i2c')
and also allows user space to query the running firmware version (for
example) from the device after a failed reload.

[1]
BUG: KASAN: use-after-free in memcpy include/linux/string.h:406 [inline]
BUG: KASAN: use-after-free in mlxsw_pci_cmd_exec+0x177/0xa60 drivers/net/ethernet/mellanox/mlxsw/pci.c:1675
Write of size 4096 at addr ffff88810ae32000 by task syz-executor.1/2355

CPU: 1 PID: 2355 Comm: syz-executor.1 Not tainted 5.8.0-rc2+ #29
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xf6/0x16e lib/dump_stack.c:118
 print_address_description.constprop.0+0x1c/0x250 mm/kasan/report.c:383
 __kasan_report mm/kasan/report.c:513 [inline]
 kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530
 check_memory_region_inline mm/kasan/generic.c:186 [inline]
 check_memory_region+0x14e/0x1b0 mm/kasan/generic.c:192
 memcpy+0x39/0x60 mm/kasan/common.c:106
 memcpy include/linux/string.h:406 [inline]
 mlxsw_pci_cmd_exec+0x177/0xa60 drivers/net/ethernet/mellanox/mlxsw/pci.c:1675
 mlxsw_cmd_exec+0x249/0x550 drivers/net/ethernet/mellanox/mlxsw/core.c:2335
 mlxsw_cmd_access_reg drivers/net/ethernet/mellanox/mlxsw/cmd.h:859 [inline]
 mlxsw_core_reg_access_cmd drivers/net/ethernet/mellanox/mlxsw/core.c:1938 [inline]
 mlxsw_core_reg_access+0x2f6/0x540 drivers/net/ethernet/mellanox/mlxsw/core.c:1985
 mlxsw_reg_query drivers/net/ethernet/mellanox/mlxsw/core.c:2000 [inline]
 mlxsw_devlink_info_get+0x17f/0x6e0 drivers/net/ethernet/mellanox/mlxsw/core.c:1090
 devlink_nl_info_fill.constprop.0+0x13c/0x2d0 net/core/devlink.c:4588
 devlink_nl_cmd_info_get_dumpit+0x246/0x460 net/core/devlink.c:4648
 genl_lock_dumpit+0x85/0xc0 net/netlink/genetlink.c:575
 netlink_dump+0x515/0xe50 net/netlink/af_netlink.c:2245
 __netlink_dump_start+0x53d/0x830 net/netlink/af_netlink.c:2353
 genl_family_rcv_msg_dumpit.isra.0+0x296/0x300 net/netlink/genetlink.c:638
 genl_family_rcv_msg net/netlink/genetlink.c:733 [inline]
 genl_rcv_msg+0x78d/0x9d0 net/netlink/genetlink.c:753
 netlink_rcv_skb+0x152/0x440 net/netlink/af_netlink.c:2469
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:764
 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
 netlink_unicast+0x53a/0x750 net/netlink/af_netlink.c:1329
 netlink_sendmsg+0x850/0xd90 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0x150/0x190 net/socket.c:672
 ____sys_sendmsg+0x6d8/0x840 net/socket.c:2363
 ___sys_sendmsg+0xff/0x170 net/socket.c:2417
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2450
 do_syscall_64+0x56/0xa0 arch/x86/entry/common.c:359
 entry_SYSCALL_64_after_hwframe+0x44/0xa9

Fixes: a9c8336f6544 ("mlxsw: core: Add support for devlink info command")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlxsw: spectrum_router: Remove inappropriate usage of WARN_ON()
Ido Schimmel [Fri, 10 Jul 2020 13:41:38 +0000 (16:41 +0300)]
mlxsw: spectrum_router: Remove inappropriate usage of WARN_ON()

We should not trigger a warning when a memory allocation fails. Remove
the WARN_ON().

The warning is constantly triggered by syzkaller when it is injecting
faults:

[ 2230.758664] FAULT_INJECTION: forcing a failure.
[ 2230.758664] name failslab, interval 1, probability 0, space 0, times 0
[ 2230.762329] CPU: 3 PID: 1407 Comm: syz-executor.0 Not tainted 5.8.0-rc2+ #28
...
[ 2230.898175] WARNING: CPU: 3 PID: 1407 at drivers/net/ethernet/mellanox/mlxsw/spectrum_router.c:6265 mlxsw_sp_router_fib_event+0xfad/0x13e0
[ 2230.898179] Kernel panic - not syncing: panic_on_warn set ...
[ 2230.898183] CPU: 3 PID: 1407 Comm: syz-executor.0 Not tainted 5.8.0-rc2+ #28
[ 2230.898190] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014

Fixes: 3057224e014c ("mlxsw: spectrum_router: Implement FIB offload in deferred work")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'macb-WOL-fixes'
David S. Miller [Fri, 10 Jul 2020 21:29:38 +0000 (14:29 -0700)]
Merge branch 'macb-WOL-fixes'

Nicolas Ferre says:

====================
net: macb: Wake-on-Lan magic packet fixes and GEM handling

Here is a split series to fix WoL magic-packet on the current macb driver. Only
fixes in this one based on current net/master.

Changes in v5:
- Addressed the error code returned by phylink_ethtool_set_wol() as suggested
  by Russell.
  If PHY handles WoL, MAC doesn't stay in the way.
- Removed Florian's tag on 3/5 because of the above changes.
- Correct the "Fixes" tag on 1/5.

Changes in v4:
- Pure bug fix series for 'net'. GEM addition and MACB update removed: will be
  sent later.

Changes in v3:
- Revert some of the v2 changes done in macb_resume(). Now the resume function
  supports in-depth re-configuration of the controller in order to deal with
  deeper sleep states. Basically as it was before changes introduced by this
  series
- Tested for non-regression with our deeper Power Management mode which cuts
  power to the controller completely

Changes in v2:
- Add patch 4/7 ("net: macb: fix macb_suspend() by removing call to netif_carrier_off()")
  needed for keeping phy state consistent
- Add patch 5/7 ("net: macb: fix call to pm_runtime in the suspend/resume functions") that prevent
  putting the macb in runtime pm suspend mode when WoL is used
- Collect review tags on 3 first patches from Florian: Thanks!
- Review of macb_resume() function
- Addition of pm_wakeup_event() in both MACB and GEM WoL IRQ handlers
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: macb: fix call to pm_runtime in the suspend/resume functions
Nicolas Ferre [Fri, 10 Jul 2020 12:46:45 +0000 (14:46 +0200)]
net: macb: fix call to pm_runtime in the suspend/resume functions

The calls to pm_runtime_force_suspend/resume() functions are only
relevant if the device is not configured to act as a WoL wakeup source.
Add the device_may_wakeup() test before calling them.

Fixes: 3e2a5e153906 ("net: macb: add wake-on-lan support via magic packet")
Cc: Claudiu Beznea <claudiu.beznea@microchip.com>
Cc: Harini Katakam <harini.katakam@xilinx.com>
Cc: Sergio Prado <sergio.prado@e-labworks.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: macb: fix macb_suspend() by removing call to netif_carrier_off()
Nicolas Ferre [Fri, 10 Jul 2020 12:46:44 +0000 (14:46 +0200)]
net: macb: fix macb_suspend() by removing call to netif_carrier_off()

As we now use the phylink call to phylink_stop() in the non-WoL path,
there is no need for this call to netif_carrier_off() anymore. It can
disturb the underlying phylink FSM.

Fixes: 7897b071ac3b ("net: macb: convert to phylink")
Cc: Claudiu Beznea <claudiu.beznea@microchip.com>
Cc: Harini Katakam <harini.katakam@xilinx.com>
Cc: Antoine Tenart <antoine.tenart@bootlin.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: macb: fix macb_get/set_wol() when moving to phylink
Nicolas Ferre [Fri, 10 Jul 2020 12:46:43 +0000 (14:46 +0200)]
net: macb: fix macb_get/set_wol() when moving to phylink

Keep previous function goals and integrate phylink actions to them.

phylink_ethtool_get_wol() is not enough to figure out if Ethernet driver
supports Wake-on-Lan.
Initialization of "supported" and "wolopts" members is done in phylink
function, no need to keep them in calling function.

phylink_ethtool_set_wol() return value is considered and determines
if the MAC has to handle WoL or not. The case where the PHY doesn't
implement WoL leads to the MAC configuring it to provide this feature.

Fixes: 7897b071ac3b ("net: macb: convert to phylink")
Cc: Claudiu Beznea <claudiu.beznea@microchip.com>
Cc: Harini Katakam <harini.katakam@xilinx.com>
Cc: Antoine Tenart <antoine.tenart@bootlin.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: macb: mark device wake capable when "magic-packet" property present
Nicolas Ferre [Fri, 10 Jul 2020 12:46:42 +0000 (14:46 +0200)]
net: macb: mark device wake capable when "magic-packet" property present

Change the way the "magic-packet" DT property is handled in the
macb_probe() function, matching DT binding documentation.
Now we mark the device as "wakeup capable" instead of calling the
device_init_wakeup() function that would enable the wakeup source.

For Ethernet WoL, enabling the wakeup_source is done by
using ethtool and associated macb_set_wol() function that
already calls device_set_wakeup_enable() for this purpose.

That would reduce power consumption by cutting more clocks if
"magic-packet" property is set but WoL is not configured by ethtool.

Fixes: 3e2a5e153906 ("net: macb: add wake-on-lan support via magic packet")
Cc: Claudiu Beznea <claudiu.beznea@microchip.com>
Cc: Harini Katakam <harini.katakam@xilinx.com>
Cc: Sergio Prado <sergio.prado@e-labworks.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: macb: fix wakeup test in runtime suspend/resume routines
Nicolas Ferre [Fri, 10 Jul 2020 12:46:41 +0000 (14:46 +0200)]
net: macb: fix wakeup test in runtime suspend/resume routines

Use the proper struct device pointer to check if the wakeup flag
and wakeup source are positioned.
Use the one passed by function call which is equivalent to
&bp->dev->dev.parent.

It's preventing the trigger of a spurious interrupt in case the
Wake-on-Lan feature is used.

Fixes: d54f89af6cc4 ("net: macb: Add pm runtime support")
Cc: Claudiu Beznea <claudiu.beznea@microchip.com>
Cc: Harini Katakam <harini.katakam@xilinx.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobnxt_en: fix NULL dereference in case SR-IOV configuration fails
Davide Caratti [Fri, 10 Jul 2020 10:55:08 +0000 (12:55 +0200)]
bnxt_en: fix NULL dereference in case SR-IOV configuration fails

we need to set 'active_vfs' back to 0, if something goes wrong during the
allocation of SR-IOV resources: otherwise, further VF configurations will
wrongly assume that bp->pf.vf[x] are valid memory locations, and commands
like the ones in the following sequence:

 # echo 2 >/sys/bus/pci/devices/${ADDR}/sriov_numvfs
 # ip link set dev ens1f0np0 up
 # ip link set dev ens1f0np0 vf 0 trust on

will cause a kernel crash similar to this:

 bnxt_en 0000:3b:00.0: not enough MMIO resources for SR-IOV
 BUG: kernel NULL pointer dereference, address: 0000000000000014
 #PF: supervisor read access in kernel mode
 #PF: error_code(0x0000) - not-present page
 PGD 0 P4D 0
 Oops: 0000 [#1] SMP PTI
 CPU: 43 PID: 2059 Comm: ip Tainted: G          I       5.8.0-rc2.upstream+ #871
 Hardware name: Dell Inc. PowerEdge R740/08D89F, BIOS 2.2.11 06/13/2019
 RIP: 0010:bnxt_set_vf_trust+0x5b/0x110 [bnxt_en]
 Code: 44 24 58 31 c0 e8 f5 fb ff ff 85 c0 0f 85 b6 00 00 00 48 8d 1c 5b 41 89 c6 b9 0b 00 00 00 48 c1 e3 04 49 03 9c 24 f0 0e 00 00 <8b> 43 14 89 c2 83 c8 10 83 e2 ef 45 84 ed 49 89 e5 0f 44 c2 4c 89
 RSP: 0018:ffffac6246a1f570 EFLAGS: 00010246
 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000000000000b
 RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff98b28f538900
 RBP: ffff98b28f538900 R08: 0000000000000000 R09: 0000000000000008
 R10: ffffffffb9515be0 R11: ffffac6246a1f678 R12: ffff98b28f538000
 R13: 0000000000000001 R14: 0000000000000000 R15: ffffffffc05451e0
 FS:  00007fde0f688800(0000) GS:ffff98baffd40000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 0000000000000014 CR3: 000000104bb0a003 CR4: 00000000007606e0
 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
 PKRU: 55555554
 Call Trace:
  do_setlink+0x994/0xfe0
  __rtnl_newlink+0x544/0x8d0
  rtnl_newlink+0x47/0x70
  rtnetlink_rcv_msg+0x29f/0x350
  netlink_rcv_skb+0x4a/0x110
  netlink_unicast+0x21d/0x300
  netlink_sendmsg+0x329/0x450
  sock_sendmsg+0x5b/0x60
  ____sys_sendmsg+0x204/0x280
  ___sys_sendmsg+0x88/0xd0
  __sys_sendmsg+0x5e/0xa0
  do_syscall_64+0x47/0x80
  entry_SYSCALL_64_after_hwframe+0x44/0xa9

Fixes: c0c050c58d840 ("bnxt_en: New Broadcom ethernet driver.")
Reported-by: Fei Liu <feliu@redhat.com>
CC: Jonathan Toppins <jtoppins@redhat.com>
CC: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Acked-by: Jonathan Toppins <jtoppins@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
David S. Miller [Fri, 10 Jul 2020 21:07:43 +0000 (14:07 -0700)]
Merge git://git./pub/scm/linux/kernel/git/bpf/bpf

Alexei Starovoitov says:

====================
pull-request: bpf 2020-07-09

The following pull-request contains BPF updates for your *net* tree.

We've added 4 non-merge commits during the last 1 day(s) which contain
a total of 4 files changed, 26 insertions(+), 15 deletions(-).

The main changes are:

1) fix crash in libbpf on 32-bit archs, from Jakub and Andrii.

2) fix crash when l2tp and bpf_sk_reuseport conflict, from Martin.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge tag 'mlx5-fixes-2020-07-02' of git://git.kernel.org/pub/scm/linux/kernel/git...
David S. Miller [Fri, 10 Jul 2020 21:02:01 +0000 (14:02 -0700)]
Merge tag 'mlx5-fixes-2020-07-02' of git://git./linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
mlx5 fixes 2020-07-02

This series introduces some fixes to mlx5 driver.

V1->v2:
 - Drop "ip -s" patch and mirred device hold reference patch.
 - Will revise them in a later submission.

Please pull and let me know if there is any problem.

For -stable v5.2
 ('net/mlx5: Fix eeprom support for SFP module')

For -stable v5.4
 ('net/mlx5e: Fix 50G per lane indication')

For -stable v5.5
 ('net/mlx5e: Fix CPU mapping after function reload to avoid aRFS RX crash')
 ('net/mlx5e: Fix VXLAN configuration restore after function reload')

For -stable v5.7
 ('net/mlx5e: CT: Fix memory leak in cleanup')
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Linus Torvalds [Fri, 10 Jul 2020 20:09:41 +0000 (13:09 -0700)]
Merge tag 'for-linus' of git://git./linux/kernel/git/rdma/rdma

Pull rdma fixes from Jason Gunthorpe:
 "Small update, a few more merge window bugs and normal driver bug
  fixes:

   - Two merge window regressions in mlx5: a error path bug found by
     syzkaller and some lost code during a rework preventing ipoib from
     working in some configurations

   - Silence clang compilation warning in OPA related code

   - Fix a long standing race condition in ib_nl for ACM

   - Resolve when the HFI1 is shutdown"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  RDMA/mlx5: Set PD pointers for the error flow unwind
  IB/mlx5: Fix 50G per lane indication
  RDMA/siw: Fix reporting vendor_part_id
  IB/sa: Resolv use-after-free in ib_nl_make_request()
  IB/hfi1: Do not destroy link_wq when the device is shut down
  IB/hfi1: Do not destroy hfi1_wq when the device is shut down
  RDMA/mlx5: Fix legacy IPoIB QP initialization
  IB/hfi1: Add explicit cast OPA_MTU_8192 to 'enum ib_mtu'

4 years agoMerge tag 'linux-kselftest-fixes-5.8-rc5' of git://git.kernel.org/pub/scm/linux/kerne...
Linus Torvalds [Fri, 10 Jul 2020 17:15:37 +0000 (10:15 -0700)]
Merge tag 'linux-kselftest-fixes-5.8-rc5' of git://git./linux/kernel/git/shuah/linux-kselftest

Pull kselftest fixes from Shuah Khan:
 "TPM2 test changes to run on python3 and kselftest framework fix to
  incorrect return type"

* tag 'linux-kselftest-fixes-5.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  kselftest: ksft_test_num return type should be unsigned
  selftests: tpm: upgrade TPM2 tests from Python 2 to Python 3

4 years agoMerge tag 'io_uring-5.8-2020-07-10' of git://git.kernel.dk/linux-block
Linus Torvalds [Fri, 10 Jul 2020 16:57:57 +0000 (09:57 -0700)]
Merge tag 'io_uring-5.8-2020-07-10' of git://git.kernel.dk/linux-block

Pull io_uring fixes from Jens Axboe:

 - Fix memleak for error path in registered files (Yang)

 - Export CQ overflow state in flags, necessary to fix a case where
   liburing doesn't know if it needs to enter the kernel (Xiaoguang)

 - Fix for a regression in when user memory is accounted freed, causing
   issues with back-to-back ring exit + init if the ulimit -l setting is
   very tight.

* tag 'io_uring-5.8-2020-07-10' of git://git.kernel.dk/linux-block:
  io_uring: account user memory freed when exit has been queued
  io_uring: fix memleak in io_sqe_files_register()
  io_uring: fix memleak in __io_sqe_files_update()
  io_uring: export cq overflow status to userspace

4 years agoMerge tag 'block-5.8-2020-07-10' of git://git.kernel.dk/linux-block
Linus Torvalds [Fri, 10 Jul 2020 16:55:46 +0000 (09:55 -0700)]
Merge tag 'block-5.8-2020-07-10' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:

 - Fix for inflight accounting, which affects only dm (Ming)

 - Fix documentation error for bfq (Yufen)

 - Fix memory leak for nbd (Zheng)

* tag 'block-5.8-2020-07-10' of git://git.kernel.dk/linux-block:
  nbd: Fix memory leak in nbd_add_socket
  blk-mq: consider non-idle request as "inflight" in blk_mq_rq_inflight()
  docs: block: update and fix tiny error for bfq

4 years agoMerge tag 'cleanup-kernel_read_write' of git://git.infradead.org/users/hch/misc
Linus Torvalds [Fri, 10 Jul 2020 16:45:15 +0000 (09:45 -0700)]
Merge tag 'cleanup-kernel_read_write' of git://git.infradead.org/users/hch/misc

Pull in-kernel read and write op cleanups from Christoph Hellwig:
 "Cleanup in-kernel read and write operations

  Reshuffle the (__)kernel_read and (__)kernel_write helpers, and ensure
  all users of in-kernel file I/O use them if they don't use iov_iter
  based methods already.

  The new WARN_ONs in combination with syzcaller already found a missing
  input validation in 9p. The fix should be on your way through the
  maintainer ASAP".

[ This is prep-work for the real changes coming 5.9 ]

* tag 'cleanup-kernel_read_write' of git://git.infradead.org/users/hch/misc:
  fs: remove __vfs_read
  fs: implement kernel_read using __kernel_read
  integrity/ima: switch to using __kernel_read
  fs: add a __kernel_read helper
  fs: remove __vfs_write
  fs: implement kernel_write using __kernel_write
  fs: check FMODE_WRITE in __kernel_write
  fs: unexport __kernel_write
  bpfilter: switch to kernel_write
  autofs: switch to kernel_write
  cachefiles: switch to kernel_write

4 years agoMerge tag 'dma-mapping-5.8-5' of git://git.infradead.org/users/hch/dma-mapping
Linus Torvalds [Fri, 10 Jul 2020 16:36:03 +0000 (09:36 -0700)]
Merge tag 'dma-mapping-5.8-5' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping fixes from Christoph Hellwig:

 - add a warning when the atomic pool is depleted (David Rientjes)

 - protect the parameters of the new scatterlist helper macros (Marek
   Szyprowski )

* tag 'dma-mapping-5.8-5' of git://git.infradead.org/users/hch/dma-mapping:
  scatterlist: protect parameters of the sg_table related macros
  dma-mapping: warn when coherent pool is depleted

4 years agoMerge tag 'pinctrl-v5.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw...
Linus Torvalds [Fri, 10 Jul 2020 16:28:52 +0000 (09:28 -0700)]
Merge tag 'pinctrl-v5.8-3' of git://git./linux/kernel/git/linusw/linux-pinctrl

Pull pin control fixes from Linus Walleij:

 - Fix an issue in the AMD driver for the UART0 group

 - Fix a glitch issue in the Baytrail pin controller

* tag 'pinctrl-v5.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
  pinctrl: baytrail: Fix pin being driven low for a while on gpiod_get(..., GPIOD_OUT_HIGH)
  pinctrl: amd: fix npins for uart0 in kerncz_groups

4 years agoMerge tag 'gpio-v5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux...
Linus Torvalds [Fri, 10 Jul 2020 16:19:39 +0000 (09:19 -0700)]
Merge tag 'gpio-v5.8-2' of git://git./linux/kernel/git/linusw/linux-gpio

Pull GPIO fixes from Linus Walleij:
 "Some GPIO fixes, most of them for the PCA953x that Andy worked hard to
  fix up.

   - Fix two runtime PM errorpath problems in the Arizona GPIO driver.

   - Fix three interrupt issues in the PCA953x driver.

   - Fix the automatic address increment handling in the PCA953x driver
     again.

   - Add a quirk to the PCA953x that fixes a problem in the Intel
     Galileo Gen 2"

* tag 'gpio-v5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpio: pca953x: Fix GPIO resource leak on Intel Galileo Gen 2
  gpio: pca953x: disable regmap locking for automatic address incrementing
  gpio: pca953x: Fix direction setting when configure an IRQ
  gpio: pca953x: Override IRQ for one of the expanders on Galileo Gen 2
  gpio: pca953x: Synchronize interrupt handler properly
  gpio: arizona: put pm_runtime in case of failure
  gpio: arizona: handle pm_runtime_get_sync failure case

4 years agoMerge tag 'gfs2-v5.8-rc4.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 10 Jul 2020 15:53:21 +0000 (08:53 -0700)]
Merge tag 'gfs2-v5.8-rc4.fixes' of git://git./linux/kernel/git/gfs2/linux-gfs2

Pull gfs2 fixes from Andreas Gruenbacher:
 "Fix gfs2 readahead deadlocks by adding a IOCB_NOIO flag that allows
  gfs2 to use the generic fiel read iterator functions without having to
  worry about being called back while holding locks".

* tag 'gfs2-v5.8-rc4.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
  gfs2: Rework read and page fault locking
  fs: Add IOCB_NOIO flag for generic_file_read_iter

4 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Fri, 10 Jul 2020 15:42:17 +0000 (08:42 -0700)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "An unfortunately large collection of arm64 fixes for -rc5.

  Some of this is absolutely trivial, but the alternatives, vDSO and CPU
  errata workaround fixes are significant. At least people are finding
  and fixing these things, I suppose.

   - Fix workaround for CPU erratum #1418040 to disable the compat vDSO

   - Fix Oops when single-stepping with KGDB

   - Fix memory attributes for hypervisor device mappings at EL2

   - Fix memory leak in PSCI and remove useless variable assignment

   - Fix up some comments and asm labels in our entry code

   - Fix broken register table formatting in our generated html docs

   - Fix missing NULL sentinel in CPU errata workaround list

   - Fix patching of branches in alternative instruction sections"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64/alternatives: don't patch up internal branches
  arm64: Add missing sentinel to erratum_1463225
  arm64: Documentation: Fix broken table in generated HTML
  arm64: kgdb: Fix single-step exception handling oops
  arm64: entry: Tidy up block comments and label numbers
  arm64: Rework ARM_ERRATUM_1414080 handling
  arm64: arch_timer: Disable the compat vdso for cores affected by ARM64_WORKAROUND_1418040
  arm64: arch_timer: Allow an workaround descriptor to disable compat vdso
  arm64: Introduce a way to disable the 32bit vdso
  arm64: entry: Fix the typo in the comment of el1_dbg()
  drivers/firmware/psci: Assign @err directly in hotplug_tests()
  drivers/firmware/psci: Fix memory leakage in alloc_init_cpu_groups()
  KVM: arm64: Fix definition of PAGE_HYP_DEVICE

4 years agoMerge tag 's390-5.8-5' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Fri, 10 Jul 2020 15:39:33 +0000 (08:39 -0700)]
Merge tag 's390-5.8-5' of git://git./linux/kernel/git/s390/linux

Pull s390 fixes from Heiko Carstens:
 "This is mainly due to the fact that Gerald Schaefer's and also my old
  email addresses currently do not work any longer. Therefore we decided
  to switch to new email addresses and reflect that in the MAINTAINERS
  file.

   - Update email addresses in MAINTAINERS file and add .mailmap entries
     for Gerald Schaefer and Heiko Carstens.

   - Fix huge pte soft dirty copying"

* tag 's390-5.8-5' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  MAINTAINERS: update email address for Gerald Schaefer
  MAINTAINERS: update email address for Heiko Carstens
  s390/mm: fix huge pte soft dirty copying

4 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Fri, 10 Jul 2020 15:34:12 +0000 (08:34 -0700)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull vkm fixes from Paolo Bonzini:
 "Two simple but important bugfixes"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: MIPS: Fix build errors for 32bit kernel
  KVM: nVMX: fixes for preemption timer migration

4 years agoMerge tag 'mmc-v5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Linus Torvalds [Fri, 10 Jul 2020 15:28:49 +0000 (08:28 -0700)]
Merge tag 'mmc-v5.8-rc1' of git://git./linux/kernel/git/ulfh/mmc

Pull MMC fixes from Ulf Hansson:

 - Override DLL_CONFIG only with valid values in sdhci-msm

 - Get rid of of_match_ptr() macro to fix warning in owl-mmc

 - Limit segments to 1 to fix meson-gx G12A/G12B SoCs

* tag 'mmc-v5.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: sdhci-msm: Override DLL_CONFIG only if the valid value is supplied
  mmc: owl-mmc: Get rid of of_match_ptr() macro
  mmc: meson-gx: limit segments to 1 when dram-access-quirk is needed

4 years agoio_uring: account user memory freed when exit has been queued
Jens Axboe [Fri, 10 Jul 2020 15:13:34 +0000 (09:13 -0600)]
io_uring: account user memory freed when exit has been queued

We currently account the memory after the exit work has been run, but
that leaves a gap where a process has closed its ring and until the
memory has been accounted as freed. If the memlocked ulimit is
borderline, then that can introduce spurious setup errors returning
-ENOMEM because the free work hasn't been run yet.

Account this as freed when we close the ring, as not to expose a tiny
gap where setting up a new ring can fail.

Fixes: 85faa7b8346e ("io_uring: punt final io_ring_ctx wait-and-free to workqueue")
Cc: stable@vger.kernel.org # v5.7
Signed-off-by: Jens Axboe <axboe@kernel.dk>
4 years agoio_uring: fix memleak in io_sqe_files_register()
Yang Yingliang [Fri, 10 Jul 2020 14:14:20 +0000 (14:14 +0000)]
io_uring: fix memleak in io_sqe_files_register()

I got a memleak report when doing some fuzz test:

BUG: memory leak
unreferenced object 0x607eeac06e78 (size 8):
  comm "test", pid 295, jiffies 4294735835 (age 31.745s)
  hex dump (first 8 bytes):
    00 00 00 00 00 00 00 00                          ........
  backtrace:
    [<00000000932632e6>] percpu_ref_init+0x2a/0x1b0
    [<0000000092ddb796>] __io_uring_register+0x111d/0x22a0
    [<00000000eadd6c77>] __x64_sys_io_uring_register+0x17b/0x480
    [<00000000591b89a6>] do_syscall_64+0x56/0xa0
    [<00000000864a281d>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

Call percpu_ref_exit() on error path to avoid
refcount memleak.

Fixes: 05f3fb3c5397 ("io_uring: avoid ring quiesce for fixed file set unregister and update")
Cc: stable@vger.kernel.org
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
4 years agoMAINTAINERS: update email address for Gerald Schaefer
Gerald Schaefer [Fri, 10 Jul 2020 11:36:26 +0000 (13:36 +0200)]
MAINTAINERS: update email address for Gerald Schaefer

Signed-off-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
4 years agoMAINTAINERS: update email address for Heiko Carstens
Heiko Carstens [Thu, 9 Jul 2020 08:37:54 +0000 (10:37 +0200)]
MAINTAINERS: update email address for Heiko Carstens

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
4 years agoxen/xenbus: Fix a double free in xenbus_map_ring_pv()
Dan Carpenter [Fri, 10 Jul 2020 11:36:10 +0000 (14:36 +0300)]
xen/xenbus: Fix a double free in xenbus_map_ring_pv()

When there is an error the caller frees "info->node" so the free here
will result in a double free.  We should just delete first kfree().

Fixes: 3848e4e0a32a ("xen/xenbus: avoid large structs and arrays on the stack")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20200710113610.GA92345@mwanda
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
4 years agoKVM: MIPS: Fix build errors for 32bit kernel
Huacai Chen [Fri, 10 Jul 2020 07:23:17 +0000 (15:23 +0800)]
KVM: MIPS: Fix build errors for 32bit kernel

Commit dc6d95b153e78ed70b1b2c04a ("KVM: MIPS: Add more MMIO load/store
instructions emulation") introduced some 64bit load/store instructions
emulation which are unavailable on 32bit platform, and it causes build
errors:

arch/mips/kvm/emulate.c: In function 'kvm_mips_emulate_store':
arch/mips/kvm/emulate.c:1734:6: error: right shift count >= width of type [-Werror]
      ((vcpu->arch.gprs[rt] >> 56) & 0xff);
      ^
arch/mips/kvm/emulate.c:1738:6: error: right shift count >= width of type [-Werror]
      ((vcpu->arch.gprs[rt] >> 48) & 0xffff);
      ^
arch/mips/kvm/emulate.c:1742:6: error: right shift count >= width of type [-Werror]
      ((vcpu->arch.gprs[rt] >> 40) & 0xffffff);
      ^
arch/mips/kvm/emulate.c:1746:6: error: right shift count >= width of type [-Werror]
      ((vcpu->arch.gprs[rt] >> 32) & 0xffffffff);
      ^
arch/mips/kvm/emulate.c:1796:6: error: left shift count >= width of type [-Werror]
      (vcpu->arch.gprs[rt] << 32);
      ^
arch/mips/kvm/emulate.c:1800:6: error: left shift count >= width of type [-Werror]
      (vcpu->arch.gprs[rt] << 40);
      ^
arch/mips/kvm/emulate.c:1804:6: error: left shift count >= width of type [-Werror]
      (vcpu->arch.gprs[rt] << 48);
      ^
arch/mips/kvm/emulate.c:1808:6: error: left shift count >= width of type [-Werror]
      (vcpu->arch.gprs[rt] << 56);
      ^
cc1: all warnings being treated as errors
make[3]: *** [arch/mips/kvm/emulate.o] Error 1

So, use #if defined(CONFIG_64BIT) && defined(CONFIG_KVM_MIPS_VZ) to
guard the 64bit load/store instructions emulation.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: dc6d95b153e78ed70b1b2c04a ("KVM: MIPS: Add more MMIO load/store instructions emulation")
Signed-off-by: Huacai Chen <chenhc@lemote.com>
Message-Id: <1594365797-536-1-git-send-email-chenhc@lemote.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agoKVM: nVMX: fixes for preemption timer migration
Paolo Bonzini [Thu, 9 Jul 2020 17:12:09 +0000 (13:12 -0400)]
KVM: nVMX: fixes for preemption timer migration

Commit 850448f35aaf ("KVM: nVMX: Fix VMX preemption timer migration",
2020-06-01) accidentally broke nVMX live migration from older version
by changing the userspace ABI.  Restore it and, while at it, ensure
that vmx->nested.has_preemption_timer_deadline is always initialized
according to the KVM_STATE_VMX_PREEMPTION_TIMER_DEADLINE flag.

Cc: Makarand Sonare <makarandsonare@google.com>
Fixes: 850448f35aaf ("KVM: nVMX: Fix VMX preemption timer migration")
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4 years agoriscv: Avoid kgdb.h including gdb_xml.h to solve unused-const-variable warning
Vincent Chen [Tue, 23 Jun 2020 05:37:35 +0000 (13:37 +0800)]
riscv: Avoid kgdb.h including gdb_xml.h to solve unused-const-variable warning

The constant arrays in gdb_xml.h are only used in arch/riscv/kernel/kgdb.c,
but other c files may include the gdb_xml.h indirectly via including the
kgdb.h. Hence, It will cause many unused-const-variable warnings. This
patch makes the kgdb.h not to include the gdb_xml.h to solve this problem.

Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
4 years agokgdb: Move the extern declaration kgdb_has_hit_break() to generic kgdb.h
Vincent Chen [Tue, 23 Jun 2020 05:37:25 +0000 (13:37 +0800)]
kgdb: Move the extern declaration kgdb_has_hit_break() to generic kgdb.h

Currently, only riscv kgdb.c uses the kgdb_has_hit_break() to identify
the kgdb breakpoint. It causes other architectures will encounter the "no
previous prototype" warnings if the compile option has W=1. Moving the
declaration of extern kgdb_has_hit_break() from risc-v kgdb.h to generic
kgdb.h to avoid generating these warnings.

Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
4 years agoriscv: Fix "no previous prototype" compile warning in kgdb.c file
Vincent Chen [Tue, 23 Jun 2020 05:37:10 +0000 (13:37 +0800)]
riscv: Fix "no previous prototype" compile warning in kgdb.c file

Some functions are only used in the kgdb.c file. Add static properities
to these functions to avoid "no previous prototype" compile warnings

Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
4 years agoriscv: enable the Kconfig prompt of STRICT_KERNEL_RWX
Vincent Chen [Tue, 23 Jun 2020 05:36:59 +0000 (13:36 +0800)]
riscv: enable the Kconfig prompt of STRICT_KERNEL_RWX

Due to lack of hardware breakpoint support, the kernel option
CONFIG_STRICT_KERNEL_RWX should be disabled when using KGDB. However,
CONFIG_STRICT_KERNEL_RWX is always enabled now. Therefore, select
ARCH_OPTIONAL_KERNEL_RWX_DEFAULT to enable CONFIG_STRICT_KERNEL_RWX
by default, and then select ARCH_OPTIONAL_KERNEL_RWX to enable the
Kconfig prompt of CONFIG_STRICT_KERNEL_RWX so that users can turn it off.

Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
4 years agokgdb: enable arch to support XML packet.
Vincent Chen [Tue, 23 Jun 2020 05:36:42 +0000 (13:36 +0800)]
kgdb: enable arch to support XML packet.

The XML packet could be supported by required architecture if the
architecture defines CONFIG_HAVE_ARCH_KGDB_QXFER_PKT and implement its own
kgdb_arch_handle_qxfer_pkt(). Except for the kgdb_arch_handle_qxfer_pkt(),
the architecture also needs to record the feature supported by gdb stub
into the kgdb_arch_gdb_stub_feature, and these features will be reported
to host gdb when gdb stub receives the qSupported packet.

Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
4 years agolibbpf: Fix libbpf hashmap on (I)LP32 architectures
Jakub Bogusz [Thu, 9 Jul 2020 22:57:23 +0000 (15:57 -0700)]
libbpf: Fix libbpf hashmap on (I)LP32 architectures

On ILP32, 64-bit result was shifted by value calculated for 32-bit long type
and returned value was much outside hashmap capacity.
As advised by Andrii Nakryiko, this patch uses different hashing variant for
architectures with size_t shorter than long long.

Fixes: e3b924224028 ("libbpf: add resizable non-thread safe internal hashmap")
Signed-off-by: Jakub Bogusz <qboosh@pld-linux.org>
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200709225723.1069937-1-andriin@fb.com
4 years agonet/mlx5e: CT: Fix memory leak in cleanup
Eli Britstein [Sun, 28 Jun 2020 12:42:26 +0000 (15:42 +0300)]
net/mlx5e: CT: Fix memory leak in cleanup

CT entries are deleted via a workqueue from netfilter. If removing the
module before that, the rules are cleaned by the driver itself, but the
memory entries for them are not freed. Fix that.

Fixes: ac991b48d43c ("net/mlx5e: CT: Offload established flows")
Signed-off-by: Eli Britstein <elibr@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5e: Fix port buffers cell size value
Eran Ben Elisha [Mon, 22 Jun 2020 06:03:31 +0000 (09:03 +0300)]
net/mlx5e: Fix port buffers cell size value

Device unit for port buffers size, xoff_threshold and xon_threshold is
cells. Fix a bug in driver where cell unit size was hard-coded to
128 bytes. This hard-coded value is buggy, as it is wrong for some hardware
versions.

Driver to read cell size from SBCAM register and translate bytes to cell
units accordingly.

In order to fix the bug, this patch exposes SBCAM (Shared buffer
capabilities mask) layout and defines.

If SBCAM.cap_cell_size is valid, use it for all bytes to cells
calculations. If not valid, fallback to 128.

Cell size do not change on the fly per device. Instead of issuing SBCAM
access reg command every time such translation is needed, cache it in
mlx5e_dcbx as part of mlx5e_dcbnl_initialize(). Pass dcbx.port_buff_cell_sz
as a param to every function that needs bytes to cells translation.

While fixing the bug, move MLX5E_BUFFER_CELL_SHIFT macro to
en_dcbnl.c, as it is only used by that file.

Fixes: 0696d60853d5 ("net/mlx5e: Receive buffer configuration")
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Reviewed-by: Huy Nguyen <huyn@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5e: Fix 50G per lane indication
Aya Levin [Mon, 15 Jun 2020 09:48:47 +0000 (12:48 +0300)]
net/mlx5e: Fix 50G per lane indication

Some released FW versions mistakenly don't set the capability that 50G
per lane link-modes are supported for VFs (ptys_extended_ethernet
capability bit). When the capability is unset, read
PTYS.ext_eth_proto_capability (always reliable).
If PTYS.ext_eth_proto_capability is valid (has a non-zero value)
conclude that the HCA supports 50G per lane. Otherwise, conclude that
the HCA doesn't support 50G per lane.

Fixes: a08b4ed1373d ("net/mlx5: Add support to ext_* fields introduced in Port Type and Speed register")
Signed-off-by: Aya Levin <ayal@mellanox.com>
Reviewed-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5e: Fix CPU mapping after function reload to avoid aRFS RX crash
Aya Levin [Wed, 20 May 2020 07:37:42 +0000 (10:37 +0300)]
net/mlx5e: Fix CPU mapping after function reload to avoid aRFS RX crash

After function reload, CPU mapping used by aRFS RX is broken, leading to
a kernel panic. Fix by moving initialization of rx_cpu_rmap from
netdev_init to netdev_attach. IRQ table is re-allocated on mlx5_load,
but netdev is not re-initialize.

Trace of the panic:
[ 22.055672] general protection fault, probably for non-canonical address 0x785634120000ff1c: 0000 [#1] SMP PTI
[ 22.065010] CPU: 4 PID: 0 Comm: swapper/4 Not tainted 5.7.0-rc2-for-upstream-perf-2020-04-21_16-34-03-31 #1
[ 22.067967] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014
[ 22.071174] RIP: 0010:get_rps_cpu+0x267/0x300
[ 22.075692] RSP: 0018:ffffc90000244d60 EFLAGS: 00010202
[ 22.076888] RAX: ffff888459b0e400 RBX: 0000000000000000 RCX:0000000000000007
[ 22.078364] RDX: 0000000000008884 RSI: ffff888467cb5b00 RDI:0000000000000000
[ 22.079815] RBP: 00000000ff342b27 R08: 0000000000000007 R09:0000000000000003
[ 22.081289] R10: ffffffffffffffff R11: 00000000000070cc R12:ffff888454900000
[ 22.082767] R13: ffffc90000e5a950 R14: ffffc90000244dc0 R15:0000000000000007
[ 22.084190] FS: 0000000000000000(0000) GS:ffff88846fc80000(0000)knlGS:0000000000000000
[ 22.086161] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 22.087427] CR2: ffffffffffffffff CR3: 0000000464426003 CR4:0000000000760ee0
[ 22.088888] DR0: 0000000000000000 DR1: 0000000000000000 DR2:0000000000000000
[ 22.090336] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:0000000000000400
[ 22.091764] PKRU: 55555554
[ 22.092618] Call Trace:
[ 22.093442] <IRQ>
[ 22.094211] ? kvm_clock_get_cycles+0xd/0x10
[ 22.095272] netif_receive_skb_list_internal+0x258/0x2a0
[ 22.096460] gro_normal_list.part.137+0x19/0x40
[ 22.097547] napi_complete_done+0xc6/0x110
[ 22.098685] mlx5e_napi_poll+0x190/0x670 [mlx5_core]
[ 22.099859] net_rx_action+0x2a0/0x400
[ 22.100848] __do_softirq+0xd8/0x2a8
[ 22.101829] irq_exit+0xa5/0xb0
[ 22.102750] do_IRQ+0x52/0xd0
[ 22.103654] common_interrupt+0xf/0xf
[ 22.104641] </IRQ>

Fixes: 4383cfcc65e7 ("net/mlx5: Add devlink reload")
Signed-off-by: Aya Levin <ayal@mellanox.com>
Reviewed-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5e: Fix VXLAN configuration restore after function reload
Aya Levin [Wed, 24 Jun 2020 16:04:03 +0000 (19:04 +0300)]
net/mlx5e: Fix VXLAN configuration restore after function reload

When detaching netdev, remove vxlan port configuration using
udp_tunnel_drop_rx_info. During function reload, configuration will be
restored using udp_tunnel_get_rx_info. This ensures sync between
firmware and driver. Use udp_tunnel_get_rx_info even if its physical
interface is down.

Fixes: 4383cfcc65e7 ("net/mlx5: Add devlink reload")
Signed-off-by: Aya Levin <ayal@mellanox.com>
Reviewed-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5e: Fix usage of rcu-protected pointer
Vlad Buslov [Wed, 17 Jun 2020 14:51:53 +0000 (17:51 +0300)]
net/mlx5e: Fix usage of rcu-protected pointer

In mlx5e_configure_flower() flow pointer is protected by rcu read lock.
However, after cited commit the pointer is being used outside of rcu read
block. Extend the block to protect all pointer accesses.

Fixes: 553f9328385d ("net/mlx5e: Support tc block sharing for representors")
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mxl5e: Verify that rpriv is not NULL
Vlad Buslov [Wed, 17 Jun 2020 14:26:33 +0000 (17:26 +0300)]
net/mxl5e: Verify that rpriv is not NULL

In helper function is_flow_rule_duplicate_allowed() verify that rpviv
pointer is not NULL before dereferencing it. This can happen when device is
in NIC mode and leads to following crash:

[90444.046419] BUG: kernel NULL pointer dereference, address: 0000000000000000
[90444.048149] #PF: supervisor read access in kernel mode
[90444.049781] #PF: error_code(0x0000) - not-present page
[90444.051386] PGD 80000003d35a4067 P4D 80000003d35a4067 PUD 3d35a3067 PMD 0
[90444.053051] Oops: 0000 [#1] SMP PTI
[90444.054683] CPU: 16 PID: 31736 Comm: tc Not tainted 5.8.0-rc1+ #1157
[90444.056340] Hardware name: Supermicro SYS-2028TP-DECR/X10DRT-P, BIOS 2.0b 03/30/2017
[90444.058079] RIP: 0010:mlx5e_configure_flower+0x3aa/0x9b0 [mlx5_core]
[90444.059753] Code: 24 50 49 8b 95 08 02 00 00 48 b8 00 08 00 00 04 00 00 00 48 21 c2 48 39 c2 74 0a 41 f6 85 0d 02 00 00 20 74 16 48 8b 44 24 20 <48> 8b 00 66 83 78 20 ff 74 07 4d 89 aa e0 00 00 00 48 83 7d 28 00
[90444.063232] RSP: 0018:ffffabe9c61ff768 EFLAGS: 00010246
[90444.065014] RAX: 0000000000000000 RBX: ffff9b13c4c91e80 RCX: 00000000000093fa
[90444.066784] RDX: 0000000400000800 RSI: 0000000000000000 RDI: 000000000002d5e0
[90444.068533] RBP: ffff9b174d308468 R08: 0000000000000000 R09: ffff9b17d63003f0
[90444.070285] R10: ffff9b17ea288600 R11: 0000000000000000 R12: ffffabe9c61ff878
[90444.072032] R13: ffff9b174d300000 R14: ffffabe9c61ffbb8 R15: ffff9b174d300880
[90444.073760] FS:  00007f3c23775480(0000) GS:ffff9b13efc80000(0000) knlGS:0000000000000000
[90444.075492] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[90444.077266] CR2: 0000000000000000 CR3: 00000003e2a60002 CR4: 00000000001606e0
[90444.079024] Call Trace:
[90444.080753]  tc_setup_cb_add+0xca/0x1e0
[90444.082415]  fl_hw_replace_filter+0x15f/0x1f0 [cls_flower]
[90444.084119]  fl_change+0xa59/0x13dc [cls_flower]
[90444.085772]  ? wait_for_completion+0xa8/0xf0
[90444.087364]  tc_new_tfilter+0x3f5/0xa60
[90444.088960]  rtnetlink_rcv_msg+0xeb/0x360
[90444.090514]  ? __d_lookup_done+0x76/0xe0
[90444.092034]  ? proc_alloc_inode+0x16/0x70
[90444.093560]  ? prep_new_page+0x8c/0xf0
[90444.095048]  ? _cond_resched+0x15/0x30
[90444.096483]  ? rtnl_calcit.isra.0+0x110/0x110
[90444.097907]  netlink_rcv_skb+0x49/0x110
[90444.099289]  netlink_unicast+0x191/0x230
[90444.100629]  netlink_sendmsg+0x243/0x480
[90444.101984]  sock_sendmsg+0x5e/0x60
[90444.103305]  ____sys_sendmsg+0x1f3/0x260
[90444.104597]  ? copy_msghdr_from_user+0x5c/0x90
[90444.105916]  ? __mod_lruvec_state+0x3c/0xe0
[90444.107210]  ___sys_sendmsg+0x81/0xc0
[90444.108484]  ? do_filp_open+0xa5/0x100
[90444.109732]  ? handle_mm_fault+0x117b/0x1e00
[90444.110970]  ? __check_object_size+0x46/0x147
[90444.112205]  ? __check_object_size+0x136/0x147
[90444.113402]  __sys_sendmsg+0x59/0xa0
[90444.114587]  do_syscall_64+0x4d/0x90
[90444.115782]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[90444.116953] RIP: 0033:0x7f3c2393b7b8
[90444.118101] Code: Bad RIP value.
[90444.119240] RSP: 002b:00007ffc6ad8e6c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[90444.120408] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3c2393b7b8
[90444.121583] RDX: 0000000000000000 RSI: 00007ffc6ad8e740 RDI: 0000000000000003
[90444.122750] RBP: 000000005eea0c3a R08: 0000000000000001 R09: 00007ffc6ad8e68c
[90444.123928] R10: 0000000000404fa8 R11: 0000000000000246 R12: 0000000000000001
[90444.125073] R13: 0000000000000000 R14: 00007ffc6ad92a00 R15: 00000000004866a0
[90444.126221] Modules linked in: act_skbedit act_tunnel_key act_mirred bonding vxlan ip6_udp_tunnel udp_tunnel nfnetlink act_gact cls_flower sch_ingress openvswitch nsh nf_conncount nfsv3 nfs_acl nfs lockd grace fscache tun bridge stp llc sunrpc rdma_ucm rdma_cm iw_cm ib_cm mlx5_ib ib_uverbs ib_core mlx5_core intel_r
apl_msr intel_rapl_common sb_edac x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel mlxfw kvm act_ct nf_flow_table nf_nat nf_conntrack irqbypass crct10dif_pclmul nf_defrag_ipv6 igb ipmi_ssif libcrc32c crc32_pclmul crc32c_intel ipmi_si nf_defrag_ipv4 ptp ghash_clmulni_intel mei_me ses iTCO_wdt i2c_i801 pps_core
ioatdma iTCO_vendor_support joydev mei enclosure intel_cstate i2c_smbus wmi dca ipmi_devintf intel_uncore lpc_ich ipmi_msghandler pcspkr acpi_pad acpi_power_meter ast i2c_algo_bit drm_vram_helper drm_kms_helper drm_ttm_helper ttm drm mpt3sas raid_class scsi_transport_sas
[90444.136253] CR2: 0000000000000000
[90444.137621] ---[ end trace 924af62aa2b151bd ]---

Fixes: 553f9328385d ("net/mlx5e: Support tc block sharing for representors")
Reported-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5: E-Switch, Fix vlan or qos setting in legacy mode
Vu Pham [Wed, 17 Jun 2020 22:11:24 +0000 (15:11 -0700)]
net/mlx5: E-Switch, Fix vlan or qos setting in legacy mode

Refactoring eswitch ingress acl codes accidentally inserts extra
memset zero that removes vlan and/or qos setting in legacy mode.

Fixes: 07bab9502641 ("net/mlx5: E-Switch, Refactor eswitch ingress acl codes")
Signed-off-by: Vu Pham <vuhuong@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5: Fix eeprom support for SFP module
Eran Ben Elisha [Sun, 14 Jun 2020 14:31:26 +0000 (17:31 +0300)]
net/mlx5: Fix eeprom support for SFP module

Fix eeprom SFP query support by setting i2c_addr, offset and page number
correctly. Unlike QSFP modules, SFP eeprom params are as follow:
- i2c_addr is 0x50 for offset 0 - 255 and 0x51 for offset 256 - 511.
- Page number is always zero.
- Page offset is always relative to zero.

As part of eeprom query, query the module ID (SFP / QSFP*) via helper
function to set the params accordingly.

In addition, change mlx5_qsfp_eeprom_page() input type to be u16 to avoid
unnecessary casting.

Fixes: a708fb7b1f8d ("net/mlx5e: ethtool, Add support for EEPROM high pages query")
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Huy Nguyen <huyn@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agoMerge tag 'drm-fixes-2020-07-10' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 10 Jul 2020 01:20:19 +0000 (18:20 -0700)]
Merge tag 'drm-fixes-2020-07-10' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "I've been off most of the week, but some fixes have piled up. Seems a
  bit busier than last week, but they are pretty spread out across a
  bunch of drivers, none of them seem that big or worried me too much.

  amdgpu:
   - Fix a suspend/resume issue with PSP
   - Backlight fix for Renoir
   - Fix for gpu recovery debugging

  radeon:
   - Fix a double free in error path

  i915:
   - fbc fencing fix
   - debugfs panic fix
   - gem vma constuction fix
   - gem pin under vm->nutex fix

  nouveau:
   - SVM fixes
   - display fixes

  meson:
   - OSD burst length fixes

  hibmc:
   - runtime warning fix

  mediatek:
   - cmdq, mmsys fixes
   - visibility check fixes"

* tag 'drm-fixes-2020-07-10' of git://anongit.freedesktop.org/drm/drm: (24 commits)
  drm/amdgpu: don't do soft recovery if gpu_recovery=0
  drm/radeon: fix double free
  drm/amd/display: add dmcub check on RENOIR
  drm/amdgpu: add TMR destory function for psp
  drm/amdgpu: asd function needs to be unloaded in suspend phase
  drm/hisilicon/hibmc: Move drm_fbdev_generic_setup() down to avoid the splat
  drm/nouveau/nouveau: fix page fault on device private memory
  drm/nouveau/svm: fix migrate page regression
  drm/nouveau/i2c/g94-: increase NV_PMGR_DP_AUXCTL_TRANSACTREQ timeout
  drm/nouveau/kms/nv50-: bail from nv50_audio_disable() early if audio not enabled
  drm/i915/gt: Pin the rings before marking active
  drm/i915: Also drop vm.ref along error paths for vma construction
  drm/i915: Drop vm.ref for duplicate vma on construction
  drm/i915/fbc: Fix fence_y_offset handling
  drm/i915: Skip stale object handle for debugfs per-file-stats
  drm/mediatek: mtk_hdmi: Remove debug messages for function calls
  drm/mediatek: mtk_mt8173_hdmi_phy: Remove unnused const variables
  drm/mediatek: Delete not used of_device_get_match_data
  drm/mediatek: Remove unnecessary conversion to bool
  drm/meson: viu: fix setting the OSD burst length in VIU_OSD1_FIFO_CTRL_STAT
  ...

4 years agoRestore gcc check in mips asm/unroll.h
Cesar Eduardo Barros [Thu, 9 Jul 2020 22:11:02 +0000 (19:11 -0300)]
Restore gcc check in mips asm/unroll.h

While raising the gcc version requirement to 4.9, the compile-time check
in the unroll macro was accidentally changed from being used on gcc and
clang to being used on clang only.

Restore the gcc check, changing it from "gcc >= 4.7" to "all gcc".

[ We should probably remove this all entirely: if we remove the check
  for CLANG, then the check for GCC can go away. Older versions of clang
  are not really appropriate or supported for kernel builds - Linus ]

Fixes: 6ec4476ac825 ("Raise gcc version requirement to 4.9")
Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.eti.br>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
4 years agokbuild: Move -Wtype-limits to W=2
Rikard Falkeborn [Wed, 8 Jul 2020 19:07:56 +0000 (21:07 +0200)]
kbuild: Move -Wtype-limits to W=2

-Wtype-limits is included in -Wextra which is added at W=1. It warns
(among other things) that 'comparison of an unsigned variable `< 0` is
always false. This causes noisy warnings, especially when used in
macros, hence it is more suitable for W=2.

Link: https://lore.kernel.org/lkml/CAHk-=wiKCXEWKJ9dWUimGbrVRo_N2RosESUw8E7m9AEtyZcu=w@mail.gmail.com/
Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
4 years agocgroup: Fix sock_cgroup_data on big-endian.
Cong Wang [Thu, 9 Jul 2020 23:28:44 +0000 (16:28 -0700)]
cgroup: Fix sock_cgroup_data on big-endian.

In order for no_refcnt and is_data to be the lowest order two
bits in the 'val' we have to pad out the bitfield of the u8.

Fixes: ad0f75e5f57c ("cgroup: fix cgroup_sk_alloc() for sk_clone_lock()")
Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoselftests: bpf: Fix detach from sockmap tests
Lorenz Bauer [Thu, 9 Jul 2020 11:51:51 +0000 (12:51 +0100)]
selftests: bpf: Fix detach from sockmap tests

Fix sockmap tests which rely on old bpf_prog_dispatch behaviour.
In the first case, the tests check that detaching without giving
a program succeeds. Since these are not the desired semantics,
invert the condition. In the second case, the clean up code doesn't
supply the necessary program fds.

Fixes: bb0de3131f4c ("bpf: sockmap: Require attach_bpf_fd when detaching a program")
Reported-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com>
Link: https://lore.kernel.org/bpf/20200709115151.75829-1-lmb@cloudflare.com
4 years agoMerge tag 'amd-drm-fixes-5.8-2020-07-09' of git://people.freedesktop.org/~agd5f/linux...
Dave Airlie [Thu, 9 Jul 2020 21:02:02 +0000 (07:02 +1000)]
Merge tag 'amd-drm-fixes-5.8-2020-07-09' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

amd-drm-fixes-5.8-2020-07-09:

amdgpu:
- Fix a suspend/resume issue with PSP
- Backlight fix for Renoir
- Fix for gpu recovery debugging

radeon:
- Fix a double free in error path

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200709185221.44895-1-alexander.deucher@amd.com
4 years agoMerge tag 'drm-intel-fixes-2020-07-08' of git://anongit.freedesktop.org/drm/drm-intel...
Dave Airlie [Thu, 9 Jul 2020 21:01:24 +0000 (07:01 +1000)]
Merge tag 'drm-intel-fixes-2020-07-08' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

One display's fbc patch fixing fence_y_offset calculation
from Ville and 4 patches from Chris on GEM: 1 fixing a debugfs
panic and others fixing vma construction and pin under vm->mutex.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200708190654.GA3924867@intel.com
4 years agoMerge branch 'linux-5.8' of git://github.com/skeggsb/linux into drm-fixes
Dave Airlie [Thu, 9 Jul 2020 20:59:05 +0000 (06:59 +1000)]
Merge branch 'linux-5.8' of git://github.com/skeggsb/linux into drm-fixes

- SVM fixes
- display fixes

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Ben Skeggs <skeggsb@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/
4 years agoMerge tag 'drm-misc-fixes-2020-07-08' of git://anongit.freedesktop.org/drm/drm-misc...
Dave Airlie [Thu, 9 Jul 2020 20:46:47 +0000 (06:46 +1000)]
Merge tag 'drm-misc-fixes-2020-07-08' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

 * meson: OSD burst-length fixes
 * hibmc: fix runtime warning by setting up generic fbdev after
   registering device

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20200708121050.GA29420@linux-uq9g
4 years agoMerge tag 'mediatek-drm-fixes-5.8' of https://git.kernel.org/pub/scm/linux/kernel...
Dave Airlie [Thu, 9 Jul 2020 20:43:31 +0000 (06:43 +1000)]
Merge tag 'mediatek-drm-fixes-5.8' of https://git./linux/kernel/git/chunkuang.hu/linux into drm-fixes

Mediatek DRM Fixes for Linux 5.8

This include fixup for cmdq, mmsys, visibility checking and some refinement.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20200707153944.604-1-chunkuang.hu@kernel.org
4 years agoMerge tag 'for-5.8/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/devic...
Linus Torvalds [Thu, 9 Jul 2020 20:14:51 +0000 (13:14 -0700)]
Merge tag 'for-5.8/dm-fixes-2' of git://git./linux/kernel/git/device-mapper/linux-dm

Pull device mapper fixes from Mike Snitzer:

 - A request-based DM fix to not use a waitqueue to wait for blk-mq IO
   completion because doing so is racey.

 - A couple more DM zoned target fixes to address issues introduced
   during the 5.8 cycle.

 - A DM core fix to use proper interface to cleanup DM's static flush
   bio.

 - A DM core fix to prevent mm recursion during memory allocation needed
   by dm_kobject_uevent.

* tag 'for-5.8/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
  dm: use noio when sending kobject event
  dm zoned: Fix zone reclaim trigger
  dm zoned: fix unused but set variable warnings
  dm writecache: reject asynchronous pmem devices
  dm: use bio_uninit instead of bio_disassociate_blkg
  dm: do not use waitqueue for request-based DM

4 years agoMerge tag 'kallsyms_show_value-v5.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Thu, 9 Jul 2020 20:09:30 +0000 (13:09 -0700)]
Merge tag 'kallsyms_show_value-v5.8-rc5' of git://git./linux/kernel/git/kees/linux

Pull kallsyms fix from Kees Cook:
 "Refactor kallsyms_show_value() users for correct cred.

  I'm not delighted by the timing of getting these changes to you, but
  it does fix a handful of kernel address exposures, and no one has
  screamed yet at the patches.

  Several users of kallsyms_show_value() were performing checks not
  during "open". Refactor everything needed to gain proper checks
  against file->f_cred for modules, kprobes, and bpf"

* tag 'kallsyms_show_value-v5.8-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  selftests: kmod: Add module address visibility test
  bpf: Check correct cred for CAP_SYSLOG in bpf_dump_raw_ok()
  kprobes: Do not expose probe addresses to non-CAP_SYSLOG
  module: Do not expose section addresses to non-CAP_SYSLOG
  module: Refactor section attr into bin attribute
  kallsyms: Refactor kallsyms_show_value() to take cred

4 years agotcp: make sure listeners don't initialize congestion-control state
Christoph Paasch [Wed, 8 Jul 2020 23:18:34 +0000 (16:18 -0700)]
tcp: make sure listeners don't initialize congestion-control state

syzkaller found its way into setsockopt with TCP_CONGESTION "cdg".
tcp_cdg_init() does a kcalloc to store the gradients. As sk_clone_lock
just copies all the memory, the allocated pointer will be copied as
well, if the app called setsockopt(..., TCP_CONGESTION) on the listener.
If now the socket will be destroyed before the congestion-control
has properly been initialized (through a call to tcp_init_transfer), we
will end up freeing memory that does not belong to that particular
socket, opening the door to a double-free:

[   11.413102] ==================================================================
[   11.414181] BUG: KASAN: double-free or invalid-free in tcp_cleanup_congestion_control+0x58/0xd0
[   11.415329]
[   11.415560] CPU: 3 PID: 4884 Comm: syz-executor.5 Not tainted 5.8.0-rc2 #80
[   11.416544] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.12.1-0-ga5cab58e9a3f-prebuilt.qemu.org 04/01/2014
[   11.418148] Call Trace:
[   11.418534]  <IRQ>
[   11.418834]  dump_stack+0x7d/0xb0
[   11.419297]  print_address_description.constprop.0+0x1a/0x210
[   11.422079]  kasan_report_invalid_free+0x51/0x80
[   11.423433]  __kasan_slab_free+0x15e/0x170
[   11.424761]  kfree+0x8c/0x230
[   11.425157]  tcp_cleanup_congestion_control+0x58/0xd0
[   11.425872]  tcp_v4_destroy_sock+0x57/0x5a0
[   11.426493]  inet_csk_destroy_sock+0x153/0x2c0
[   11.427093]  tcp_v4_syn_recv_sock+0xb29/0x1100
[   11.427731]  tcp_get_cookie_sock+0xc3/0x4a0
[   11.429457]  cookie_v4_check+0x13d0/0x2500
[   11.433189]  tcp_v4_do_rcv+0x60e/0x780
[   11.433727]  tcp_v4_rcv+0x2869/0x2e10
[   11.437143]  ip_protocol_deliver_rcu+0x23/0x190
[   11.437810]  ip_local_deliver+0x294/0x350
[   11.439566]  __netif_receive_skb_one_core+0x15d/0x1a0
[   11.441995]  process_backlog+0x1b1/0x6b0
[   11.443148]  net_rx_action+0x37e/0xc40
[   11.445361]  __do_softirq+0x18c/0x61a
[   11.445881]  asm_call_on_stack+0x12/0x20
[   11.446409]  </IRQ>
[   11.446716]  do_softirq_own_stack+0x34/0x40
[   11.447259]  do_softirq.part.0+0x26/0x30
[   11.447827]  __local_bh_enable_ip+0x46/0x50
[   11.448406]  ip_finish_output2+0x60f/0x1bc0
[   11.450109]  __ip_queue_xmit+0x71c/0x1b60
[   11.451861]  __tcp_transmit_skb+0x1727/0x3bb0
[   11.453789]  tcp_rcv_state_process+0x3070/0x4d3a
[   11.456810]  tcp_v4_do_rcv+0x2ad/0x780
[   11.457995]  __release_sock+0x14b/0x2c0
[   11.458529]  release_sock+0x4a/0x170
[   11.459005]  __inet_stream_connect+0x467/0xc80
[   11.461435]  inet_stream_connect+0x4e/0xa0
[   11.462043]  __sys_connect+0x204/0x270
[   11.465515]  __x64_sys_connect+0x6a/0xb0
[   11.466088]  do_syscall_64+0x3e/0x70
[   11.466617]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   11.467341] RIP: 0033:0x7f56046dc469
[   11.467844] Code: Bad RIP value.
[   11.468282] RSP: 002b:00007f5604dccdd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
[   11.469326] RAX: ffffffffffffffda RBX: 000000000068bf00 RCX: 00007f56046dc469
[   11.470379] RDX: 0000000000000010 RSI: 0000000020000000 RDI: 0000000000000004
[   11.471311] RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000000000
[   11.472286] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[   11.473341] R13: 000000000041427c R14: 00007f5604dcd5c0 R15: 0000000000000003
[   11.474321]
[   11.474527] Allocated by task 4884:
[   11.475031]  save_stack+0x1b/0x40
[   11.475548]  __kasan_kmalloc.constprop.0+0xc2/0xd0
[   11.476182]  tcp_cdg_init+0xf0/0x150
[   11.476744]  tcp_init_congestion_control+0x9b/0x3a0
[   11.477435]  tcp_set_congestion_control+0x270/0x32f
[   11.478088]  do_tcp_setsockopt.isra.0+0x521/0x1a00
[   11.478744]  __sys_setsockopt+0xff/0x1e0
[   11.479259]  __x64_sys_setsockopt+0xb5/0x150
[   11.479895]  do_syscall_64+0x3e/0x70
[   11.480395]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   11.481097]
[   11.481321] Freed by task 4872:
[   11.481783]  save_stack+0x1b/0x40
[   11.482230]  __kasan_slab_free+0x12c/0x170
[   11.482839]  kfree+0x8c/0x230
[   11.483240]  tcp_cleanup_congestion_control+0x58/0xd0
[   11.483948]  tcp_v4_destroy_sock+0x57/0x5a0
[   11.484502]  inet_csk_destroy_sock+0x153/0x2c0
[   11.485144]  tcp_close+0x932/0xfe0
[   11.485642]  inet_release+0xc1/0x1c0
[   11.486131]  __sock_release+0xc0/0x270
[   11.486697]  sock_close+0xc/0x10
[   11.487145]  __fput+0x277/0x780
[   11.487632]  task_work_run+0xeb/0x180
[   11.488118]  __prepare_exit_to_usermode+0x15a/0x160
[   11.488834]  do_syscall_64+0x4a/0x70
[   11.489326]  entry_SYSCALL_64_after_hwframe+0x44/0xa9

Wei Wang fixed a part of these CDG-malloc issues with commit c12014440750
("tcp: memset ca_priv data to 0 properly").

This patch here fixes the listener-scenario: We make sure that listeners
setting the congestion-control through setsockopt won't initialize it
(thus CDG never allocates on listeners). For those who use AF_UNSPEC to
reuse a socket, tcp_disconnect() is changed to cleanup afterwards.

(The issue can be reproduced at least down to v4.4.x.)

Cc: Wei Wang <weiwan@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Fixes: 2b0a8c9eee81 ("tcp: add CDG congestion control")
Signed-off-by: Christoph Paasch <cpaasch@apple.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobpf: net: Avoid incorrect bpf_sk_reuseport_detach call
Martin KaFai Lau [Thu, 9 Jul 2020 06:11:10 +0000 (23:11 -0700)]
bpf: net: Avoid incorrect bpf_sk_reuseport_detach call

bpf_sk_reuseport_detach is currently called when sk->sk_user_data
is not NULL.  It is incorrect because sk->sk_user_data may not be
managed by the bpf's reuseport_array.  It has been reported in [1] that,
the bpf_sk_reuseport_detach() which is called from udp_lib_unhash() has
corrupted the sk_user_data managed by l2tp.

This patch solves it by using another bit (defined as SK_USER_DATA_BPF)
of the sk_user_data pointer value.  It marks that a sk_user_data is
managed/owned by BPF.

The patch depends on a PTRMASK introduced in
commit f1ff5ce2cd5e ("net, sk_msg: Clear sk_user_data pointer on clone if tagged").

[ Note: sk->sk_user_data is used by bpf's reuseport_array only when a sk is
  added to the bpf's reuseport_array.
  i.e. doing setsockopt(SO_REUSEPORT) and having "sk->sk_reuseport == 1"
  alone will not stop sk->sk_user_data being used by other means. ]

[1]: https://lore.kernel.org/netdev/20200706121259.GA20199@katalix.com/

Fixes: 5dc4c4b7d4e8 ("bpf: Introduce BPF_MAP_TYPE_REUSEPORT_SOCKARRAY")
Reported-by: James Chapman <jchapman@katalix.com>
Reported-by: syzbot+9f092552ba9a5efca5df@syzkaller.appspotmail.com
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Tested-by: James Chapman <jchapman@katalix.com>
Acked-by: James Chapman <jchapman@katalix.com>
Link: https://lore.kernel.org/bpf/20200709061110.4019316-1-kafai@fb.com
4 years agobpf: net: Avoid copying sk_user_data of reuseport_array during sk_clone
Martin KaFai Lau [Thu, 9 Jul 2020 06:11:04 +0000 (23:11 -0700)]
bpf: net: Avoid copying sk_user_data of reuseport_array during sk_clone

It makes little sense for copying sk_user_data of reuseport_array during
sk_clone_lock().  This patch reuses the SK_USER_DATA_NOCOPY bit introduced in
commit f1ff5ce2cd5e ("net, sk_msg: Clear sk_user_data pointer on clone if tagged").
It is used to mark the sk_user_data is not supposed to be copied to its clone.

Although the cloned sk's sk_user_data will not be used/freed in
bpf_sk_reuseport_detach(), this change can still allow the cloned
sk's sk_user_data to be used by some other means.

Freeing the reuseport_array's sk_user_data does not require a rcu grace
period.  Thus, the existing rcu_assign_sk_user_data_nocopy() is not
used.

Fixes: 5dc4c4b7d4e8 ("bpf: Introduce BPF_MAP_TYPE_REUSEPORT_SOCKARRAY")
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com>
Link: https://lore.kernel.org/bpf/20200709061104.4018798-1-kafai@fb.com
4 years agoethtool: fix genlmsg_put() failure handling in ethnl_default_dumpit()
Michal Kubecek [Thu, 9 Jul 2020 10:11:50 +0000 (12:11 +0200)]
ethtool: fix genlmsg_put() failure handling in ethnl_default_dumpit()

If the genlmsg_put() call in ethnl_default_dumpit() fails, we bail out
without checking if we already have some messages in current skb like we do
with ethnl_default_dump_one() failure later. Therefore if existing messages
almost fill up the buffer so that there is not enough space even for
netlink and genetlink header, we lose all prepared messages and return and
error.

Rather than duplicating the skb->len check, move the genlmsg_put(),
genlmsg_cancel() and genlmsg_end() calls into ethnl_default_dump_one().
This is also more logical as all message composition will be in
ethnl_default_dump_one() and only iteration logic will be left in
ethnl_default_dumpit().

Fixes: 728480f12442 ("ethtool: default handlers for GET requests")
Reported-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet_sched: fix a memory leak in atm_tc_init()
Cong Wang [Thu, 9 Jul 2020 03:13:59 +0000 (20:13 -0700)]
net_sched: fix a memory leak in atm_tc_init()

When tcf_block_get() fails inside atm_tc_init(),
atm_tc_put() is called to release the qdisc p->link.q.
But the flow->ref prevents it to do so, as the flow->ref
is still zero.

Fix this by moving the p->link.ref initialization before
tcf_block_get().

Fixes: 6529eaba33f0 ("net: sched: introduce tcf block infractructure")
Reported-and-tested-by: syzbot+d411cff6ab29cc2c311b@syzkaller.appspotmail.com
Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoqed: Populate nvm-file attributes while reading nvm config partition.
Sudarsana Reddy Kalluru [Thu, 9 Jul 2020 03:14:29 +0000 (20:14 -0700)]
qed: Populate nvm-file attributes while reading nvm config partition.

NVM config file address will be modified when the MBI image is upgraded.
Driver would return stale config values if user reads the nvm-config
(via ethtool -d) in this state. The fix is to re-populate nvm attribute
info while reading the nvm config values/partition.

Changes from previous version:
-------------------------------
v3: Corrected the formatting in 'Fixes' tag.
v2: Added 'Fixes' tag.

Fixes: 1ac4329a1cff ("qed: Add configuration information to register dump and debug data")
Signed-off-by: Sudarsana Reddy Kalluru <skalluru@marvell.com>
Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agodrm/amdgpu: don't do soft recovery if gpu_recovery=0
Marek Olšák [Mon, 6 Jul 2020 22:23:17 +0000 (18:23 -0400)]
drm/amdgpu: don't do soft recovery if gpu_recovery=0

It's impossible to debug shader hangs with soft recovery.

Signed-off-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
4 years agodrm/radeon: fix double free
Tom Rix [Mon, 6 Jul 2020 12:28:57 +0000 (05:28 -0700)]
drm/radeon: fix double free

clang static analysis flags this error

drivers/gpu/drm/radeon/ci_dpm.c:5652:9: warning: Use of memory after it is freed [unix.Malloc]
                kfree(rdev->pm.dpm.ps[i].ps_priv);
                      ^~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/radeon/ci_dpm.c:5654:2: warning: Attempt to free released memory [unix.Malloc]
        kfree(rdev->pm.dpm.ps);
        ^~~~~~~~~~~~~~~~~~~~~~

problem is reported in ci_dpm_fini, with these code blocks.

for (i = 0; i < rdev->pm.dpm.num_ps; i++) {
kfree(rdev->pm.dpm.ps[i].ps_priv);
}
kfree(rdev->pm.dpm.ps);

The first free happens in ci_parse_power_table where it cleans up locally
on a failure.  ci_dpm_fini also does a cleanup.

ret = ci_parse_power_table(rdev);
if (ret) {
ci_dpm_fini(rdev);
return ret;
}

So remove the cleanup in ci_parse_power_table and
move the num_ps calculation to inside the loop so ci_dpm_fini
will know how many array elements to free.

Fixes: cc8dbbb4f62a ("drm/radeon: add dpm support for CI dGPUs (v2)")

Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
4 years agodrm/amd/display: add dmcub check on RENOIR
Aaron Ma [Wed, 8 Jul 2020 08:16:22 +0000 (04:16 -0400)]
drm/amd/display: add dmcub check on RENOIR

RENOIR loads dmub fw not dmcu, check dmcu only will prevent loading iram,
it breaks backlight control.

Bug: https://bugzilla.kernel.org/show_bug.cgi?id=208277
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: Aaron Ma <aaron.ma@canonical.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
4 years agodrm/amdgpu: add TMR destory function for psp
Huang Rui [Tue, 30 Jun 2020 04:32:57 +0000 (12:32 +0800)]
drm/amdgpu: add TMR destory function for psp

TMR is required to be destoried with GFX_CMD_ID_DESTROY_TMR while the
system goes to suspend. Otherwise, PSP may return the failure state
(0xFFFF007) on Gfx-2-PSP command GFX_CMD_ID_SETUP_TMR after do multiple
times suspend/resume.

Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
4 years agodrm/amdgpu: asd function needs to be unloaded in suspend phase
Huang Rui [Tue, 30 Jun 2020 02:43:21 +0000 (10:43 +0800)]
drm/amdgpu: asd function needs to be unloaded in suspend phase

Unload ASD function in suspend phase.

Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
4 years agobtrfs: wire up iter_file_splice_write
Christoph Hellwig [Thu, 9 Jul 2020 16:22:06 +0000 (18:22 +0200)]
btrfs: wire up iter_file_splice_write

btrfs implements the iter_write op and thus can use the more efficient
iov_iter based splice implementation.  For now falling back to the less
efficient default is pretty harmless, but I have a pending series that
removes the default, and thus would cause btrfs to not support splice
at all.

Reported-by: Andy Lavr <andy.lavr@gmail.com>
Tested-by: Andy Lavr <andy.lavr@gmail.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agobtrfs: fix double put of block group with nocow
Josef Bacik [Mon, 6 Jul 2020 13:14:12 +0000 (09:14 -0400)]
btrfs: fix double put of block group with nocow

While debugging a patch that I wrote I was hitting use-after-free panics
when accessing block groups on unmount.  This turned out to be because
in the nocow case if we bail out of doing the nocow for whatever reason
we need to call btrfs_dec_nocow_writers() if we called the inc.  This
puts our block group, but a few error cases does

if (nocow) {
    btrfs_dec_nocow_writers();
    goto error;
}

unfortunately, error is

error:
if (nocow)
btrfs_dec_nocow_writers();

so we get a double put on our block group.  Fix this by dropping the
error cases calling of btrfs_dec_nocow_writers(), as it's handled at the
error label now.

Fixes: 762bf09893b4 ("btrfs: improve error handling in run_delalloc_nocow")
CC: stable@vger.kernel.org # 5.4+
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
4 years agocifs: update internal module version number
Steve French [Wed, 8 Jul 2020 04:52:07 +0000 (23:52 -0500)]
cifs: update internal module version number

        To 2.28

Signed-off-by: Steve French <stfrench@microsoft.com>
4 years agocifs: fix reference leak for tlink
Ronnie Sahlberg [Thu, 9 Jul 2020 10:39:49 +0000 (20:39 +1000)]
cifs: fix reference leak for tlink

Don't leak a reference to tlink during the NOTIFY ioctl

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
CC: Stable <stable@vger.kernel.org> # v5.6+
4 years agoarm64/alternatives: don't patch up internal branches
Ard Biesheuvel [Thu, 9 Jul 2020 12:59:53 +0000 (15:59 +0300)]
arm64/alternatives: don't patch up internal branches

Commit f7b93d42945c ("arm64/alternatives: use subsections for replacement
sequences") moved the alternatives replacement sequences into subsections,
in order to keep the as close as possible to the code that they replace.

Unfortunately, this broke the logic in branch_insn_requires_update,
which assumed that any branch into kernel executable code was a branch
that required updating, which is no longer the case now that the code
sequences that are patched in are in the same section as the patch site
itself.

So the only way to discriminate branches that require updating and ones
that don't is to check whether the branch targets the replacement sequence
itself, and so we can drop the call to kernel_text_address() entirely.

Fixes: f7b93d42945c ("arm64/alternatives: use subsections for replacement sequences")
Reported-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Alexandru Elisei <alexandru.elisei@arm.com>
Link: https://lore.kernel.org/r/20200709125953.30918-1-ardb@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
4 years agos390/mm: fix huge pte soft dirty copying
Janosch Frank [Tue, 7 Jul 2020 13:38:54 +0000 (15:38 +0200)]
s390/mm: fix huge pte soft dirty copying

If the pmd is soft dirty we must mark the pte as soft dirty (and not dirty).
This fixes some cases for guest migration with huge page backings.

Cc: <stable@vger.kernel.org> # 4.8
Fixes: bc29b7ac1d9f ("s390/mm: clean up pte/pmd encoding")
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
4 years agoarm64: Add missing sentinel to erratum_1463225
Florian Fainelli [Thu, 9 Jul 2020 05:13:40 +0000 (22:13 -0700)]
arm64: Add missing sentinel to erratum_1463225

When the erratum_1463225 array was introduced a sentinel at the end was
missing thus causing a KASAN: global-out-of-bounds in
is_affected_midr_range_list on arm64 error.

Fixes: a9e821b89daa ("arm64: Add KRYO4XX gold CPU cores to erratum list 1463225 and 1418040")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Link: https://lore.kernel.org/linux-arm-kernel/CA+G9fYs3EavpU89-rTQfqQ9GgxAMgMAk7jiiVrfP0yxj5s+Q6g@mail.gmail.com/
Link: https://lore.kernel.org/r/20200709051345.14544-1-f.fainelli@gmail.com
Signed-off-by: Will Deacon <will@kernel.org>
4 years agoio_uring: fix memleak in __io_sqe_files_update()
Yang Yingliang [Thu, 9 Jul 2020 10:11:41 +0000 (10:11 +0000)]
io_uring: fix memleak in __io_sqe_files_update()

I got a memleak report when doing some fuzz test:

BUG: memory leak
unreferenced object 0xffff888113e02300 (size 488):
comm "syz-executor401", pid 356, jiffies 4294809529 (age 11.954s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
a0 a4 ce 19 81 88 ff ff 60 ce 09 0d 81 88 ff ff ........`.......
backtrace:
[<00000000129a84ec>] kmem_cache_zalloc include/linux/slab.h:659 [inline]
[<00000000129a84ec>] __alloc_file+0x25/0x310 fs/file_table.c:101
[<000000003050ad84>] alloc_empty_file+0x4f/0x120 fs/file_table.c:151
[<000000004d0a41a3>] alloc_file+0x5e/0x550 fs/file_table.c:193
[<000000002cb242f0>] alloc_file_pseudo+0x16a/0x240 fs/file_table.c:233
[<00000000046a4baa>] anon_inode_getfile fs/anon_inodes.c:91 [inline]
[<00000000046a4baa>] anon_inode_getfile+0xac/0x1c0 fs/anon_inodes.c:74
[<0000000035beb745>] __do_sys_perf_event_open+0xd4a/0x2680 kernel/events/core.c:11720
[<0000000049009dc7>] do_syscall_64+0x56/0xa0 arch/x86/entry/common.c:359
[<00000000353731ca>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

BUG: memory leak
unreferenced object 0xffff8881152dd5e0 (size 16):
comm "syz-executor401", pid 356, jiffies 4294809529 (age 11.954s)
hex dump (first 16 bytes):
01 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<0000000074caa794>] kmem_cache_zalloc include/linux/slab.h:659 [inline]
[<0000000074caa794>] lsm_file_alloc security/security.c:567 [inline]
[<0000000074caa794>] security_file_alloc+0x32/0x160 security/security.c:1440
[<00000000c6745ea3>] __alloc_file+0xba/0x310 fs/file_table.c:106
[<000000003050ad84>] alloc_empty_file+0x4f/0x120 fs/file_table.c:151
[<000000004d0a41a3>] alloc_file+0x5e/0x550 fs/file_table.c:193
[<000000002cb242f0>] alloc_file_pseudo+0x16a/0x240 fs/file_table.c:233
[<00000000046a4baa>] anon_inode_getfile fs/anon_inodes.c:91 [inline]
[<00000000046a4baa>] anon_inode_getfile+0xac/0x1c0 fs/anon_inodes.c:74
[<0000000035beb745>] __do_sys_perf_event_open+0xd4a/0x2680 kernel/events/core.c:11720
[<0000000049009dc7>] do_syscall_64+0x56/0xa0 arch/x86/entry/common.c:359
[<00000000353731ca>] entry_SYSCALL_64_after_hwframe+0x44/0xa9

If io_sqe_file_register() failed, we need put the file that get by fget()
to avoid the memleak.

Fixes: c3a31e605620 ("io_uring: add support for IORING_REGISTER_FILES_UPDATE")
Cc: stable@vger.kernel.org
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>