review.tizen.org Git - platform/kernel/linux-starfive.git/log

lib: use PFN_PHYS() in devmem_is_allowed()

The physical address may exceed 32 bits on 32-bit systems with more than
32 bits of physcial address. Use PFN_PHYS() in devmem_is_allowed(), or
the physical address may overflow and be truncated.

We found this bug when mapping a high addresses through devmem tool,
when CONFIG_STRICT_DEVMEM is enabled on the ARM with ARM_LPAE and devmem
is used to map a high address that is not in the iomem address range, an
unexpected error indicating no permission is returned.

This bug was initially introduced from v2.6.37, and the function was
moved to lib in v5.11.

Link: https://lkml.kernel.org/r/20210731025057.78825-1-wangliang101@huawei.com
Fixes: 087aaffcdf9c ("ARM: implement CONFIG_STRICT_DEVMEM by disabling access to RAM via /dev/mem")
Fixes: 527701eda5f1 ("lib: Add a generic version of devmem_is_allowed()")
Signed-off-by: Liang Wang <wangliang101@huawei.com>
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
Cc: Palmer Dabbelt <palmerdabbelt@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Liang Wang <wangliang101@huawei.com>
Cc: Xiaoming Ni <nixiaoming@huawei.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Cc: <stable@vger.kernel.org> [2.6.37+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/memcg: fix incorrect flushing of lruvec data in obj_stock

When mod_objcg_state() is called with a pgdat that is different from
that in the obj_stock, the old lruvec data cached in obj_stock are
flushed out. Unfortunately, they were flushed to the new pgdat and so
the data go to the wrong node. This will screw up the slab data
reported in /sys/devices/system/node/node*/meminfo.

Fix that by flushing the data to the cached pgdat instead.

Link: https://lkml.kernel.org/r/20210802143834.30578-1-longman@redhat.com
Fixes: 68ac5b3c8db2 ("mm/memcg: cache vmstat data in percpu memcg_stock_pcp")
Signed-off-by: Waiman Long <longman@redhat.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Roman Gushchin <guro@fb.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Alex Shi <alex.shi@linux.alibaba.com>
Cc: Chris Down <chris@chrisdown.name>
Cc: Yafang Shao <laoar.shao@gmail.com>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Masayoshi Mizuma <msys.mizuma@gmail.com>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Waiman Long <longman@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/madvise: report SIGBUS as -EFAULT for MADV_POPULATE_(READ|WRITE)

Doing some extended tests and polishing the man page update for
MADV_POPULATE_(READ|WRITE), I realized that we end up converting also
SIGBUS (via -EFAULT) to -EINVAL, making it look like yet another
madvise() user error.

We want to report only problematic mappings and permission problems that
the user could have know as -EINVAL.

Let's not convert -EFAULT arising due to SIGBUS (or SIGSEGV) to -EINVAL,
but instead indicate -EFAULT to user space. While we could also convert
it to -ENOMEM, using -EFAULT looks more helpful when user space might
want to troubleshoot what's going wrong: MADV_POPULATE_(READ|WRITE) is
not part of an final Linux release and we can still adjust the behavior.

Link: https://lkml.kernel.org/r/20210726154932.102880-1-david@redhat.com
Fixes: 4ca9b3859dac ("mm/madvise: introduce MADV_POPULATE_(READ|WRITE) to prefault page tables")
Signed-off-by: David Hildenbrand <david@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Jann Horn <jannh@google.com>
Cc: Jason Gunthorpe <jgg@ziepe.ca>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Chris Zankel <chris@zankel.net>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Rolf Eike Beer <eike-kernel@sf-tec.de>
Cc: Ram Pai <linuxram@us.ibm.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm: slub: fix slub_debug disabling for list of slabs

Vijayanand Jitta reports:

  Consider the scenario where CONFIG_SLUB_DEBUG_ON is set and we would
  want to disable slub_debug for few slabs. Using boot parameter with
  slub_debug=-,slab_name syntax doesn't work as expected i.e; only
  disabling debugging for the specified list of slabs. Instead it
  disables debugging for all slabs, which is wrong.

This patch fixes it by delaying the moment when the global slub_debug
flags variable is updated.  In case a "slub_debug=-,slab_name" has been
passed, the global flags remain as initialized (depending on
CONFIG_SLUB_DEBUG_ON enabled or disabled) and are not simply reset to 0.

Link: https://lkml.kernel.org/r/8a3d992a-473a-467b-28a0-4ad2ff60ab82@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Reported-by: Vijayanand Jitta <vjitta@codeaurora.org>
Reviewed-by: Vijayanand Jitta <vjitta@codeaurora.org>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Vinayak Menon <vinmenon@codeaurora.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

slub: fix kmalloc_pagealloc_invalid_free unit test

The unit test kmalloc_pagealloc_invalid_free makes sure that for the
higher order slub allocation which goes to page allocator, the free is
called with the correct address i.e.  the virtual address of the head
page.

Commit f227f0faf63b ("slub: fix unreclaimable slab stat for bulk free")
unified the free code paths for page allocator based slub allocations
but instead of using the address passed by the caller, it extracted the
address from the page.  Thus making the unit test
kmalloc_pagealloc_invalid_free moot.  So, fix this by using the address
passed by the caller.

Should we fix this? I think yes because dev expect kasan to catch these
type of programming bugs.

Link: https://lkml.kernel.org/r/20210802180819.1110165-1-shakeelb@google.com
Fixes: f227f0faf63b ("slub: fix unreclaimable slab stat for bulk free")
Signed-off-by: Shakeel Butt <shakeelb@google.com>
Reported-by: Nathan Chancellor <nathan@kernel.org>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Roman Gushchin <guro@fb.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

kasan, slub: reset tag when printing address

The address still includes the tags when it is printed. With hardware
tag-based kasan enabled, we will get a false positive KASAN issue when
we access metadata.

Reset the tag before we access the metadata.

Link: https://lkml.kernel.org/r/20210804090957.12393-3-Kuan-Ying.Lee@mediatek.com
Fixes: aa1ef4d7b3f6 ("kasan, mm: reset tags when accessing metadata")
Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Reviewed-by: Marco Elver <elver@google.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chinwen Chang <chinwen.chang@mediatek.com>
Cc: Nicholas Tang <nicholas.tang@mediatek.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

kasan, kmemleak: reset tags when scanning block

Patch series "kasan, slub: reset tag when printing address", v3.

With hardware tag-based kasan enabled, we reset the tag when we access
metadata to avoid from false alarm.

This patch (of 2):

Kmemleak needs to scan kernel memory to check memory leak.  With hardware
tag-based kasan enabled, when it scans on the invalid slab and
dereference, the issue will occur as below.

Hardware tag-based KASAN doesn't use compiler instrumentation, we can not
use kasan_disable_current() to ignore tag check.

Based on the below report, there are 11 0xf7 granules, which amounts to
176 bytes, and the object is allocated from the kmalloc-256 cache.  So
when kmemleak accesses the last 256-176 bytes, it causes faults, as those
are marked with KASAN_KMALLOC_REDZONE == KASAN_TAG_INVALID == 0xfe.

Thus, we reset tags before accessing metadata to avoid from false positives.

  BUG: KASAN: out-of-bounds in scan_block+0x58/0x170
  Read at addr f7ff0000c0074eb0 by task kmemleak/138
  Pointer tag: [f7], memory tag: [fe]

  CPU: 7 PID: 138 Comm: kmemleak Not tainted 5.14.0-rc2-00001-g8cae8cd89f05-dirty #134
  Hardware name: linux,dummy-virt (DT)
  Call trace:
   dump_backtrace+0x0/0x1b0
   show_stack+0x1c/0x30
   dump_stack_lvl+0x68/0x84
   print_address_description+0x7c/0x2b4
   kasan_report+0x138/0x38c
   __do_kernel_fault+0x190/0x1c4
   do_tag_check_fault+0x78/0x90
   do_mem_abort+0x44/0xb4
   el1_abort+0x40/0x60
   el1h_64_sync_handler+0xb4/0xd0
   el1h_64_sync+0x78/0x7c
   scan_block+0x58/0x170
   scan_gray_list+0xdc/0x1a0
   kmemleak_scan+0x2ac/0x560
   kmemleak_scan_thread+0xb0/0xe0
   kthread+0x154/0x160
   ret_from_fork+0x10/0x18

  Allocated by task 0:
   kasan_save_stack+0x2c/0x60
   __kasan_kmalloc+0xec/0x104
   __kmalloc+0x224/0x3c4
   __register_sysctl_paths+0x200/0x290
   register_sysctl_table+0x2c/0x40
   sysctl_init+0x20/0x34
   proc_sys_init+0x3c/0x48
   proc_root_init+0x80/0x9c
   start_kernel+0x648/0x6a4
   __primary_switched+0xc0/0xc8

  Freed by task 0:
   kasan_save_stack+0x2c/0x60
   kasan_set_track+0x2c/0x40
   kasan_set_free_info+0x44/0x54
   ____kasan_slab_free.constprop.0+0x150/0x1b0
   __kasan_slab_free+0x14/0x20
   slab_free_freelist_hook+0xa4/0x1fc
   kfree+0x1e8/0x30c
   put_fs_context+0x124/0x220
   vfs_kern_mount.part.0+0x60/0xd4
   kern_mount+0x24/0x4c
   bdev_cache_init+0x70/0x9c
   vfs_caches_init+0xdc/0xf4
   start_kernel+0x638/0x6a4
   __primary_switched+0xc0/0xc8

  The buggy address belongs to the object at ffff0000c0074e00
   which belongs to the cache kmalloc-256 of size 256
  The buggy address is located 176 bytes inside of
   256-byte region [ffff0000c0074e00, ffff0000c0074f00)
  The buggy address belongs to the page:
  page:(____ptrval____) refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x100074
  head:(____ptrval____) order:2 compound_mapcount:0 compound_pincount:0
  flags: 0xbfffc0000010200(slab|head|node=0|zone=2|lastcpupid=0xffff|kasantag=0x0)
  raw: 0bfffc0000010200 0000000000000000 dead000000000122 f5ff0000c0002300
  raw: 0000000000000000 0000000000200020 00000001ffffffff 0000000000000000
  page dumped because: kasan: bad access detected

  Memory state around the buggy address:
   ffff0000c0074c00: f0 f0 f0 f0 f0 f0 f0 f0 f0 fe fe fe fe fe fe fe
   ffff0000c0074d00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
  >ffff0000c0074e00: f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 f7 fe fe fe fe fe
                                                      ^
   ffff0000c0074f00: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
   ffff0000c0075000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
  ==================================================================
  Disabling lock debugging due to kernel taint
  kmemleak: 181 new suspected memory leaks (see /sys/kernel/debug/kmemleak)

Link: https://lkml.kernel.org/r/20210804090957.12393-1-Kuan-Ying.Lee@mediatek.com
Link: https://lkml.kernel.org/r/20210804090957.12393-2-Kuan-Ying.Lee@mediatek.com
Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Marco Elver <elver@google.com>
Cc: Nicholas Tang <nicholas.tang@mediatek.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Chinwen Chang <chinwen.chang@mediatek.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Merge tag 'net-5.14-rc6' of git://git./linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
"Networking fixes, including fixes from netfilter, bpf, can and
  ieee802154.

  The size of this is pretty normal, but we got more fixes for 5.14
  changes this week than last week. Nothing major but the trend is the
  opposite of what we like. We'll see how the next week goes..

  Current release - regressions:

   - r8169: fix ASPM-related link-up regressions

   - bridge: fix flags interpretation for extern learn fdb entries

   - phy: micrel: fix link detection on ksz87xx switch

   - Revert "tipc: Return the correct errno code"

   - ptp: fix possible memory leak caused by invalid cast

  Current release - new code bugs:

   - bpf: add missing bpf_read_[un]lock_trace() for syscall program

   - bpf: fix potentially incorrect results with bpf_get_local_storage()

   - page_pool: mask the page->signature before the checking, avoid dma
     mapping leaks

   - netfilter: nfnetlink_hook: 5 fixes to information in netlink dumps

   - bnxt_en: fix firmware interface issues with PTP

   - mlx5: Bridge, fix ageing time

  Previous releases - regressions:

   - linkwatch: fix failure to restore device state across
     suspend/resume

   - bareudp: fix invalid read beyond skb's linear data

  Previous releases - always broken:

   - bpf: fix integer overflow involving bucket_size

   - ppp: fix issues when desired interface name is specified via
     netlink

   - wwan: mhi_wwan_ctrl: fix possible deadlock

   - dsa: microchip: ksz8795: fix number of VLAN related bugs

   - dsa: drivers: fix broken backpressure in .port_fdb_dump

   - dsa: qca: ar9331: make proper initial port defaults

  Misc:

   - bpf: add lockdown check for probe_write_user helper

   - netfilter: conntrack: remove offload_pickup sysctl before 5.14 is
     out

   - netfilter: conntrack: collect all entries in one cycle,
     heuristically slow down garbage collection scans on idle systems to
     prevent frequent wake ups"

* tag 'net-5.14-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (87 commits)
  vsock/virtio: avoid potential deadlock when vsock device remove
  wwan: core: Avoid returning NULL from wwan_create_dev()
  net: dsa: sja1105: unregister the MDIO buses during teardown
  Revert "tipc: Return the correct errno code"
  net: mscc: Fix non-GPL export of regmap APIs
  net: igmp: increase size of mr_ifc_count
  MAINTAINERS: switch to my OMP email for Renesas Ethernet drivers
  tcp_bbr: fix u32 wrap bug in round logic if bbr_init() called after 2B packets
  net: pcs: xpcs: fix error handling on failed to allocate memory
  net: linkwatch: fix failure to restore device state across suspend/resume
  net: bridge: fix memleak in br_add_if()
  net: switchdev: zero-initialize struct switchdev_notifier_fdb_info emitted by drivers towards the bridge
  net: bridge: fix flags interpretation for extern learn fdb entries
  net: dsa: sja1105: fix broken backpressure in .port_fdb_dump
  net: dsa: lantiq: fix broken backpressure in .port_fdb_dump
  net: dsa: lan9303: fix broken backpressure in .port_fdb_dump
  net: dsa: hellcreek: fix broken backpressure in .port_fdb_dump
  bpf, core: Fix kernel-doc notation
  net: igmp: fix data-race in igmp_ifc_timer_expire()
  net: Fix memory leak in ieee802154_raw_deliver
  ...

Merge tag 'ceph-for-5.14-rc6' of git://github.com/ceph/ceph-client

Pull ceph fixes from Ilya Dryomov:
"A patch to avoid a soft lockup in ceph_check_delayed_caps() from Luis
  and a reference handling fix from Jeff that should address some memory
  corruption reports in the snaprealm area.

  Both marked for stable"

* tag 'ceph-for-5.14-rc6' of git://github.com/ceph/ceph-client:
  ceph: take snap_empty_lock atomically with snaprealm refcount change
  ceph: reduce contention in ceph_check_delayed_caps()

Merge tag 'drm-fixes-2021-08-13' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
"Another week, another set of pretty regular fixes, nothing really
  stands out too much.

  amdgpu:
   - Yellow carp update
   - RAS EEPROM fixes
   - BACO/BOCO fixes
   - Fix a memory leak in an error path
   - Freesync fix
   - VCN harvesting fix
   - Display fixes

  i915:
   - GVT fix for Windows VM hang.
   - Display fix of 12 BPC bits for display 12 and newer.
   - Don't try to access some media register for fused off domains.
   - Fix kerneldoc build warnings.

  mediatek:
   - Fix dpi bridge bug.
   - Fix cursor plane no update.

  meson:
   - Fix colors when booting with HDR"

* tag 'drm-fixes-2021-08-13' of git://anongit.freedesktop.org/drm/drm:
  drm/doc/rfc: drop lmem uapi section
  drm/i915: Only access SFC_DONE when media domain is not fused off
  drm/i915/display: Fix the 12 BPC bits for PIPE_MISC reg
  drm/amd/display: use GFP_ATOMIC in amdgpu_dm_irq_schedule_work
  drm/amd/display: Remove invalid assert for ODM + MPC case
  drm/amd/pm: bug fix for the runtime pm BACO
  drm/amdgpu: handle VCN instances when harvesting (v2)
  drm/meson: fix colour distortion from HDR set during vendor u-boot
  drm/i915/gvt: Fix cached atomics setting for Windows VM
  drm/amdgpu: Add preferred mode in modeset when freesync video mode's enabled.
  drm/amd/pm: Fix a memory leak in an error handling path in 'vangogh_tables_init()'
  drm/amdgpu: don't enable baco on boco platforms in runpm
  drm/amdgpu: set RAS EEPROM address from VBIOS
  drm/amd/pm: update smu v13.0.1 firmware header
  drm/mediatek: Fix cursor plane no update
  drm/mediatek: mtk-dpi: Set out_fmt from config if not the last bridge
  drm/mediatek: dpi: Fix NULL dereference in mtk_dpi_bridge_atomic_check

Merge tag 'drm-misc-fixes-2021-08-12' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

Short summary of fixes pull:

* meson: Fix colors when booting with HDR

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/YRTb+qUuBYWjJDVg@linux-uq9g.fritz.box

Merge tag 'drm-intel-fixes-2021-08-12' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

- GVT fix for Windows VM hang.
- Display fix of 12 BPC bits for display 12 and newer.
- Don't try to access some media register for fused off domains.
- Fix kerneldoc build warnings.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/YRU/hnQ1sNr+j37x@intel.com

Merge tag 'ieee802154-for-davem-2021-08-12' of git://git./linux/kernel/git/sschmidt/wpan

Stefan Schmidt says:

====================
ieee802154 for net 2021-08-12

Mostly fixes coming from bot reports. Dongliang Mu tackled some syzkaller
reports in hwsim again and Takeshi Misawa a memory leak  in  ieee802154 raw.

* tag 'ieee802154-for-davem-2021-08-12' of git://git.kernel.org/pub/scm/linux/kernel/git/sschmidt/wpan:
  net: Fix memory leak in ieee802154_raw_deliver
  ieee802154: hwsim: fix GPF in hwsim_new_edge_nl
  ieee802154: hwsim: fix GPF in hwsim_set_edge_lqi
====================

Link: https://lore.kernel.org/r/20210812183912.1663996-1-stefan@datenfreihafen.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

vsock/virtio: avoid potential deadlock when vsock device remove

There's a potential deadlock case when remove the vsock device or
process the RESET event:

  vsock_for_each_connected_socket:
      spin_lock_bh(&vsock_table_lock) ----------- (1)
      ...
          virtio_vsock_reset_sock:
              lock_sock(sk) --------------------- (2)
      ...
      spin_unlock_bh(&vsock_table_lock)

lock_sock() may do initiative schedule when the 'sk' is owned by
other thread at the same time, we would receivce a warning message
that "scheduling while atomic".

Even worse, if the next task (selected by the scheduler) try to
release a 'sk', it need to request vsock_table_lock and the deadlock
occur, cause the system into softlockup state.
  Call trace:
   queued_spin_lock_slowpath
   vsock_remove_bound
   vsock_remove_sock
   virtio_transport_release
   __vsock_release
   vsock_release
   __sock_release
   sock_close
   __fput
   ____fput

So we should not require sk_lock in this case, just like the behavior
in vhost_vsock or vmci.

Fixes: 0ea9e1d3a9e3 ("VSOCK: Introduce virtio_transport.ko")
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Longpeng(Mike) <longpeng2@huawei.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20210812053056.1699-1-longpeng2@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Merge branch 'for-v5.14' of git://git./linux/kernel/git/ebiederm/user-namespace

Pull ucounts fix from Eric Biederman:
"This fixes the ucount sysctls on big endian architectures.

  The counts were expanded to be longs instead of ints, and the sysctl
  code was overlooked, so only the low 32bit were being processed. On
  litte endian just processing the low 32bits is fine, but on 64bit big
  endian processing just the low 32bits results in the high order bits
  instead of the low order bits being processed and nothing works
  proper.

  This change took a little bit to mature as we have the SYSCTL_ZERO,
  and SYSCTL_INT_MAX macros that are only usable for sysctls operating
  on ints, but unfortunately are not obviously broken. Which resulted in
  the versions of this change working on big endian and not on little
  endian, because the int SYSCTL_ZERO when extended 64bit wound up being
  0x100000000. So we only allowed values greater than 0x100000000 and
  less than 0faff. Which unfortunately broken everything that tried to
  set the sysctls. (First reported with the windows subsystem for
  linux).

  I have tested this on x86_64 64bit after first reproducing the
  problems with the earlier version of this change, and then verifying
  the problems do not exist when we use appropriate long min and max
  values for extra1 and extra2"

* 'for-v5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
  ucounts: add missing data type changes

Merge tag 'sound-5.14-rc6' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
"This seems to be a usual bump in the middle, containing lots of
  pending ASoC fixes:

   - Yet another PCM mmap regression fix

   - Fix for ASoC DAPM prefix handling

   - Various cs42l42 codec fixes

   - PCM buffer reference fixes in a few ASoC drivers

   - Fixes for ASoC SOF, AMD, tlv320, WM

   - HD-audio quirks"

* tag 'sound-5.14-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (32 commits)
  ALSA: hda/realtek: fix mute/micmute LEDs for HP ProBook 650 G8 Notebook PC
  ALSA: pcm: Fix mmap breakage without explicit buffer setup
  ALSA: hda: Add quirk for ASUS Flow x13
  ASoC: cs42l42: Fix mono playback
  ASoC: cs42l42: Constrain sample rate to prevent illegal SCLK
  ASoC: cs42l42: Fix LRCLK frame start edge
  ASoC: cs42l42: PLL must be running when changing MCLK_SRC_SEL
  ASoC: cs42l42: Remove duplicate control for WNF filter frequency
  ASoC: cs42l42: Fix inversion of ADC Notch Switch control
  ASoC: SOF: Intel: hda-ipc: fix reply size checking
  ASoC: SOF: Intel: Kconfig: fix SoundWire dependencies
  ASoC: amd: Fix reference to PCM buffer address
  ASoC: nau8824: Fix open coded prefix handling
  ASoC: kirkwood: Fix reference to PCM buffer address
  ASoC: uniphier: Fix reference to PCM buffer address
  ASoC: xilinx: Fix reference to PCM buffer address
  ASoC: intel: atom: Fix reference to PCM buffer address
  ASoC: cs42l42: Fix bclk calculation for mono
  ASoC: cs42l42: Don't allow SND_SOC_DAIFMT_LEFT_J
  ASoC: cs42l42: Correct definition of ADC Volume control
  ...

wwan: core: Avoid returning NULL from wwan_create_dev()

Make wwan_create_dev() to return either valid or error pointer,
In some cases it may return NULL. Prevent this by converting
it to the respective error pointer.

Fixes: 9a44c1cc6388 ("net: Add a WWAN subsystem")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Reviewed-by: Loic Poulain <loic.poulain@linaro.org>
Link: https://lore.kernel.org/r/20210811124845.10955-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drm/doc/rfc: drop lmem uapi section

We still have quite a bit more work to do with overall reworking of
the ttm-based dg1 code, but the uapi stuff is now finalized with the
latest pull. So remove that.

This also fixes kerneldoc build warnings because we've included the
same headers in two places, resulting in sphinx complaining about
duplicated symbols. This regression has been created when we moved the
uapi definitions to the real include/uapi/ folder in 727ecd99a4c9
("drm/doc/rfc: drop the i915_gem_lmem.h header")

v2: Fix a few references that I missed, the htmldocs build took
forever.

Acked-by: Jason Ekstrand <jason@jlekstrand.net>
Acked-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Tested-by Stephen Rothwell <sfr@canb.auug.org.au> (v1)
References: https://lore.kernel.org/dri-devel/20210603193242.1ce99344@canb.auug.org.au/
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Fixes: 727ecd99a4c9 ("drm/doc/rfc: drop the i915_gem_lmem.h header")
Cc: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210810142748.1983271-1-daniel.vetter@ffwll.ch
(cherry picked from commit dae2d28832968751f7731336b560a4a84a197b76)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drm/i915: Only access SFC_DONE when media domain is not fused off

The SFC_DONE register lives within the corresponding VD0/VD2/VD4/VD6
forcewake domain and is not accessible if the vdbox in that domain is
fused off and the forcewake is not initialized.

This mistake went unnoticed because until recently we were using the
wrong register offset for the SFC_DONE register; once the register
offset was corrected, we started hitting errors like

<4> [544.989065] i915 0000:cc:00.0: Uninitialized forcewake domain(s) 0x80 accessed at 0x1ce000

on parts with fused-off vdbox engines.

Fixes: e50dbdbfd9fb ("drm/i915/tgl: Add SFC instdone to error state")
Fixes: 9c9c6d0ab08a ("drm/i915: Correct SFC_DONE register offset")
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210806174130.1058960-1-matthew.d.roper@intel.com
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
(cherry picked from commit c5589bb5dccb0c5cb74910da93663f489589f3ce)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
[Changed Fixes tag to match the cherry-picked 82929a2140eb]

drm/i915/display: Fix the 12 BPC bits for PIPE_MISC reg

Till DISPLAY12 the PIPE_MISC bits 5-7 are used to set the
Dithering BPC, with valid values of 6, 8, 10 BPC.
For ADLP+ these bits are used to set the PORT OUTPUT BPC, with valid
values of: 6, 8, 10, 12 BPC, and need to be programmed whether
dithering is enabled or not.

This patch:
-corrects the bits 5-7 for PIPE MISC register for 12 BPC.
-renames the bits and mask to have generic names for these bits for
dithering bpc and port output bpc.

v3: Added a note for MIPI DSI which uses the PIPE_MISC for readout
for pipe_bpp. (Uma Shankar)

v2: Added 'display' to the subject and fixes tag. (Uma Shankar)

Fixes: 756f85cffef2 ("drm/i915/bdw: Broadwell has PIPEMISC")
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com> (v1)
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: intel-gfx@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v3.13+
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210811051857.109723-1-ankit.k.nautiyal@intel.com
(cherry picked from commit 70418a68713c13da3f36c388087d0220b456a430)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

net: dsa: sja1105: unregister the MDIO buses during teardown

The call to sja1105_mdiobus_unregister is present in the error path but
absent from the main driver unbind path.

Fixes: 5a8f09748ee7 ("net: dsa: sja1105: register the MDIO buses for 100base-T1 and 100base-TX")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Revert "tipc: Return the correct errno code"

This reverts commit 0efea3c649f0 because of:
- The returning -ENOBUF error is fine on socket buffer allocation.
- There is side effect in the calling path
tipc_node_xmit()->tipc_link_xmit() when checking error code returning.

Fixes: 0efea3c649f0 ("tipc: Return the correct errno code")
Acked-by: Jon Maloy <jmaloy@redhat.com>
Signed-off-by: Hoang Le <hoang.h.le@dektech.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: mscc: Fix non-GPL export of regmap APIs

The ocelot driver makes use of regmap, wrapping it with driver specific
operations that are thin wrappers around the core regmap APIs. These are
exported with EXPORT_SYMBOL, dropping the _GPL from the core regmap
exports which is frowned upon. Add _GPL suffixes to at least the APIs that
are doing register I/O.

Signed-off-by: Mark Brown <broonie@kernel.org>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge tag 'orphans-v5.14-rc6' of git://git./linux/kernel/git/kees/linux

Pull orphan section linker fix from Kees Cook:

- Handle changes to Clang's Sanitizer section layout (Nathan
Chancellor)

* tag 'orphans-v5.14-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
vmlinux.lds.h: Handle clang's module.{c,d}tor sections

Merge tag 'seccomp-v5.14-rc6' of git://git./linux/kernel/git/kees/linux

Pull seccomp fixes from Kees Cook:

- Fix typo in user notification documentation (Rodrigo Campos)

- Fix userspace counter report when using TSYNC (Hsuan-Chi Kuo, Wiktor
   Garbacz)

* tag 'seccomp-v5.14-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  seccomp: Fix setting loaded filter count during TSYNC
  Documentation: seccomp: Fix typo in user notification

Merge tag 'amd-drm-fixes-5.14-2021-08-11' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes

amd-drm-fixes-5.14-2021-08-11:

amdgpu:
- Yellow carp update
- RAS EEPROM fixes
- BACO/BOCO fixes
- Fix a memory leak in an error path
- Freesync fix
- VCN harvesting fix
- Display fixes

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210812022153.4005-1-alexander.deucher@amd.com

net: igmp: increase size of mr_ifc_count

Some arches support cmpxchg() on 4-byte and 8-byte only.
Increase mr_ifc_count width to 32bit to fix this problem.

Fixes: 4a2b285e7e10 ("net: igmp: fix data-race in igmp_ifc_timer_expire()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20210811195715.3684218-1-eric.dumazet@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

MAINTAINERS: switch to my OMP email for Renesas Ethernet drivers

I'm still going to continue looking after the Renesas Ethernet drivers and
device tree bindings. Now my new employer, Open Mobile Platform (OMP), will
pay for all my upstream work. Let's switch to my OMP email for the reviews.

Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Link: https://lore.kernel.org/r/9c212711-a0d7-39cd-7840-ff7abf938da1@omp.ru
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

tcp_bbr: fix u32 wrap bug in round logic if bbr_init() called after 2B packets

Currently if BBR congestion control is initialized after more than 2B
packets have been delivered, depending on the phase of the
tp->delivered counter the tracking of BBR round trips can get stuck.

The bug arises because if tp->delivered is between 2^31 and 2^32 at
the time the BBR congestion control module is initialized, then the
initialization of bbr->next_rtt_delivered to 0 will cause the logic to
believe that the end of the round trip is still billions of packets in
the future. More specifically, the following check will fail
repeatedly:

!before(rs->prior_delivered, bbr->next_rtt_delivered)

and thus the connection will take up to 2B packets delivered before
that check will pass and the connection will set:

bbr->round_start = 1;

This could cause many mechanisms in BBR to fail to trigger, for
example bbr_check_full_bw_reached() would likely never exit STARTUP.

This bug is 5 years old and has not been observed, and as a practical
matter this would likely rarely trigger, since it would require
transferring at least 2B packets, or likely more than 3 terabytes of
data, before switching congestion control algorithms to BBR.

This patch is a stable candidate for kernels as far back as v4.9,
when tcp_bbr.c was added.

Fixes: 0f8782ea1497 ("tcp_bbr: add BBR congestion control")
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Reviewed-by: Yuchung Cheng <ycheng@google.com>
Reviewed-by: Kevin Yang <yyd@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20210811024056.235161-1-ncardwell@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

net: pcs: xpcs: fix error handling on failed to allocate memory

Drivers such as sja1105 and stmmac that call xpcs_create() expects an
error returned by the pcs-xpcs module, but this was not the case on
failed to allocate memory.

Fixed this by returning an -ENOMEM instead of a NULL pointer.

Fixes: 3ad1d171548e ("net: dsa: sja1105: migrate to xpcs for SGMII")
Signed-off-by: Wong Vee Khee <vee.khee.wong@linux.intel.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20210810085812.1808466-1-vee.khee.wong@linux.intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

net: linkwatch: fix failure to restore device state across suspend/resume

After migrating my laptop from 4.19-LTS to 5.4-LTS a while ago I noticed
that my Ethernet port to which a bond and a VLAN interface are attached
appeared to remain up after resuming from suspend with the cable unplugged
(and that problem still persists with 5.10-LTS).

It happens that the following happens:

  - the network driver (e1000e here) prepares to suspend, calls e1000e_down()
    which calls netif_carrier_off() to signal that the link is going down.
  - netif_carrier_off() adds a link_watch event to the list of events for
    this device
  - the device is completely stopped.
  - the machine suspends
  - the cable is unplugged and the machine brought to another location
  - the machine is resumed
  - the queued linkwatch events are processed for the device
  - the device doesn't yet have the __LINK_STATE_PRESENT bit and its events
    are silently dropped
  - the device is resumed with its link down
  - the upper VLAN and bond interfaces are never notified that the link had
    been turned down and remain up
  - the only way to provoke a change is to physically connect the machine
    to a port and possibly unplug it.

The state after resume looks like this:
  $ ip -br li | egrep 'bond|eth'
  bond0            UP             e8:6a:64:64:64:64 <BROADCAST,MULTICAST,MASTER,UP,LOWER_UP>
  eth0             DOWN           e8:6a:64:64:64:64 <NO-CARRIER,BROADCAST,MULTICAST,SLAVE,UP>
  eth0.2@eth0      UP             e8:6a:64:64:64:64 <BROADCAST,MULTICAST,SLAVE,UP,LOWER_UP>

Placing an explicit call to netdev_state_change() either in the suspend
or the resume code in the NIC driver worked around this but the solution
is not satisfying.

The issue in fact really is in link_watch that loses events while it
ought not to. It happens that the test for the device being present was
added by commit 124eee3f6955 ("net: linkwatch: add check for netdevice
being present to linkwatch_do_dev") in 4.20 to avoid an access to
devices that are not present.

Instead of dropping events, this patch proceeds slightly differently by
postponing their handling so that they happen after the device is fully
resumed.

Fixes: 124eee3f6955 ("net: linkwatch: add check for netdevice being present to linkwatch_do_dev")
Link: https://lists.openwall.net/netdev/2018/03/15/62
Cc: Heiner Kallweit <hkallweit1@gmail.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20210809160628.22623-1-w@1wt.eu
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

vmlinux.lds.h: Handle clang's module.{c,d}tor sections

A recent change in LLVM causes module_{c,d}tor sections to appear when
CONFIG_K{A,C}SAN are enabled, which results in orphan section warnings
because these are not handled anywhere:

ld.lld: warning: arch/x86/pci/built-in.a(legacy.o):(.text.asan.module_ctor) is being placed in '.text.asan.module_ctor'
ld.lld: warning: arch/x86/pci/built-in.a(legacy.o):(.text.asan.module_dtor) is being placed in '.text.asan.module_dtor'
ld.lld: warning: arch/x86/pci/built-in.a(legacy.o):(.text.tsan.module_ctor) is being placed in '.text.tsan.module_ctor'

Fangrui explains: "the function asan.module_ctor has the SHF_GNU_RETAIN
flag, so it is in a separate section even with -fno-function-sections
(default)".

Place them in the TEXT_TEXT section so that these technologies continue
to work with the newer compiler versions. All of the KASAN and KCSAN
KUnit tests continue to pass after this change.

Cc: stable@vger.kernel.org
Link: https://github.com/ClangBuiltLinux/linux/issues/1432
Link: https://github.com/llvm/llvm-project/commit/7b789562244ee941b7bf2cefeb3fc08a59a01865
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Fangrui Song <maskray@google.com>
Acked-by: Marco Elver <elver@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20210731023107.1932981-1-nathan@kernel.org

seccomp: Fix setting loaded filter count during TSYNC

The desired behavior is to set the caller's filter count to thread's.
This value is reported via /proc, so this fixes the inaccurate count
exposed to userspace; it is not used for reference counting, etc.

Signed-off-by: Hsuan-Chi Kuo <hsuanchikuo@gmail.com>
Link: https://lore.kernel.org/r/20210304233708.420597-1-hsuanchikuo@gmail.com
Co-developed-by: Wiktor Garbacz <wiktorg@google.com>
Signed-off-by: Wiktor Garbacz <wiktorg@google.com>
Link: https://lore.kernel.org/lkml/20210810125158.329849-1-wiktorg@google.com
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: stable@vger.kernel.org
Fixes: c818c03b661c ("seccomp: Report number of loaded filters in /proc/$pid/status")

Merge tag 'mediatek-drm-fixes-5.14' of https://git./linux/kernel/git/chunkuang.hu/linux into drm-fixes

Mediatek DRM Fixes for Linux 5.14

1. Fix dpi bridge bug.
2. Fix cursor plane no update.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210809150604.32426-1-chunkuang.hu@kernel.org

Merge tag 'arc-5.14-rc6' of git://git./linux/kernel/git/vgupta/arc

Pull ARC fixes from Vineet Gupta:

- Fix FPU_STATUS update

- Update my email address

- Other spellos and fixes

* tag 'arc-5.14-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  MAINTAINERS: update Vineet's email address
  ARC: fp: set FPU_STATUS.FWE to enable FPU_STATUS update on context switch
  ARC: Fix CONFIG_STACKDEPOT
  arc: Fix spelling mistake and grammar in Kconfig
  arc: Prefer unsigned int to bare use of unsigned

net: bridge: fix memleak in br_add_if()

I got a memleak report:

BUG: memory leak
unreferenced object 0x607ee521a658 (size 240):
comm "syz-executor.0", pid 955, jiffies 4294780569 (age 16.449s)
hex dump (first 32 bytes, cpu 1):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<00000000d830ea5a>] br_multicast_add_port+0x1c2/0x300 net/bridge/br_multicast.c:1693
[<00000000274d9a71>] new_nbp net/bridge/br_if.c:435 [inline]
[<00000000274d9a71>] br_add_if+0x670/0x1740 net/bridge/br_if.c:611
[<0000000012ce888e>] do_set_master net/core/rtnetlink.c:2513 [inline]
[<0000000012ce888e>] do_set_master+0x1aa/0x210 net/core/rtnetlink.c:2487
[<0000000099d1cafc>] __rtnl_newlink+0x1095/0x13e0 net/core/rtnetlink.c:3457
[<00000000a01facc0>] rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3488
[<00000000acc9186c>] rtnetlink_rcv_msg+0x369/0xa10 net/core/rtnetlink.c:5550
[<00000000d4aabb9c>] netlink_rcv_skb+0x134/0x3d0 net/netlink/af_netlink.c:2504
[<00000000bc2e12a3>] netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
[<00000000bc2e12a3>] netlink_unicast+0x4a0/0x6a0 net/netlink/af_netlink.c:1340
[<00000000e4dc2d0e>] netlink_sendmsg+0x789/0xc70 net/netlink/af_netlink.c:1929
[<000000000d22c8b3>] sock_sendmsg_nosec net/socket.c:654 [inline]
[<000000000d22c8b3>] sock_sendmsg+0x139/0x170 net/socket.c:674
[<00000000e281417a>] ____sys_sendmsg+0x658/0x7d0 net/socket.c:2350
[<00000000237aa2ab>] ___sys_sendmsg+0xf8/0x170 net/socket.c:2404
[<000000004f2dc381>] __sys_sendmsg+0xd3/0x190 net/socket.c:2433
[<0000000005feca6c>] do_syscall_64+0x37/0x90 arch/x86/entry/common.c:47
[<000000007304477d>] entry_SYSCALL_64_after_hwframe+0x44/0xae

On error path of br_add_if(), p->mcast_stats allocated in
new_nbp() need be freed, or it will be leaked.

Fixes: 1080ab95e3c7 ("net: bridge: add support for IGMP/MLD stats and export them via netlink")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Acked-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Link: https://lore.kernel.org/r/20210809132023.978546-1-yangyingliang@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

net: switchdev: zero-initialize struct switchdev_notifier_fdb_info emitted by drivers towards the bridge

The blamed commit added a new field to struct switchdev_notifier_fdb_info,
but did not make sure that all call paths set it to something valid.
For example, a switchdev driver may emit a SWITCHDEV_FDB_ADD_TO_BRIDGE
notifier, and since the 'is_local' flag is not set, it contains junk
from the stack, so the bridge might interpret those notifications as
being for local FDB entries when that was not intended.

To avoid that now and in the future, zero-initialize all
switchdev_notifier_fdb_info structures created by drivers such that all
newly added fields to not need to touch drivers again.

Fixes: 2c4eca3ef716 ("net: bridge: switchdev: include local flag in FDB notifications")
Reported-by: Ido Schimmel <idosch@idosch.org>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Tested-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Karsten Graul <kgraul@linux.ibm.com>
Link: https://lore.kernel.org/r/20210810115024.1629983-1-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

net: bridge: fix flags interpretation for extern learn fdb entries

Ignore fdb flags when adding port extern learn entries and always set
BR_FDB_LOCAL flag when adding bridge extern learn entries. This is
closest to the behaviour we had before and avoids breaking any use cases
which were allowed.

This patch fixes iproute2 calls which assume NUD_PERMANENT and were
allowed before, example:
$ bridge fdb add 00:11:22:33:44:55 dev swp1 extern_learn

Extern learn entries are allowed to roam, but do not expire, so static
or dynamic flags make no sense for them.

Also add a comment for future reference.

Fixes: eb100e0e24a2 ("net: bridge: allow to add externally learned entries from user-space")
Fixes: 0541a6293298 ("net: bridge: validate the NUD_PERMANENT bit when adding an extern_learn FDB entry")
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Tested-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20210810110010.43859-1-razor@blackwall.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Merge tag 'platform-drivers-x86-v5.14-3' of git://git./linux/kernel/git/pdx86/platform-drivers-x86

Pull x86 platform driver fixes from Hans de Goede:
"Small set of pdx86 fixes for 5.14"

* tag 'platform-drivers-x86-v5.14-3' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86:
  platform/x86: pcengines-apuv2: Add missing terminating entries to gpio-lookup tables
  platform/x86: Make dual_accel_detect() KIOX010A + KIOX020A detect more robust
  platform/x86: Add and use a dual_accel_detect() helper

Merge tag 'ovl-fixes-5.14-rc6-v2' of git://git./linux/kernel/git/mszeredi/vfs

Pull overlayfs fixes from Miklos Szeredi:
"Fix several bugs in overlayfs"

* tag 'ovl-fixes-5.14-rc6-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
  ovl: prevent private clone if bind mount is not allowed
  ovl: fix uninitialized pointer read in ovl_lookup_real_one()
  ovl: fix deadlock in splice write
  ovl: skip stale entries in merge dir cache iteration

Merge https://git./linux/kernel/git/bpf/bpf

Daniel Borkmann says:

====================
bpf 2021-08-10

We've added 5 non-merge commits during the last 2 day(s) which contain
a total of 7 files changed, 27 insertions(+), 15 deletions(-).

1) Fix missing bpf_read_lock_trace() context for BPF loader progs, from Yonghong Song.

2) Fix corner case where BPF prog retrieves wrong local storage, also from Yonghong Song.

3) Restrict availability of BPF write_user helper behind lockdown, from Daniel Borkmann.

4) Fix multiple kernel-doc warnings in BPF core, from Randy Dunlap.

* https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
  bpf, core: Fix kernel-doc notation
  bpf: Fix potentially incorrect results with bpf_get_local_storage()
  bpf: Add missing bpf_read_[un]lock_trace() for syscall program
  bpf: Add lockdown check for probe_write_user helper
  bpf: Add _kernel suffix to internal lockdown_bpf_read
====================

Link: https://lore.kernel.org/r/20210810144025.22814-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drm/amd/display: use GFP_ATOMIC in amdgpu_dm_irq_schedule_work

Replace GFP_KERNEL with GFP_ATOMIC as amdgpu_dm_irq_schedule_work
can't sleep.

BUG: sleeping function called from invalid context at include/linux/sched/mm.h:196
in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 253, name: kworker/6:1H
CPU: 6 PID: 253 Comm: kworker/6:1H Tainted: G W OE 5.11.0-promotion_2021_06_07-18_36_28_prelim_revert_retrain #8
Hardware name: System manufacturer System Product Name/PRIME X570-PRO, BIOS 3405 02/01/2021
Workqueue: events_highpri dm_irq_work_func [amdgpu]
Call Trace:
<IRQ>
dump_stack+0x5e/0x74
___might_sleep.cold+0x87/0x98
__might_sleep+0x4b/0x80
kmem_cache_alloc_trace+0x390/0x4f0
amdgpu_dm_irq_handler+0x171/0x230 [amdgpu]
amdgpu_irq_dispatch+0xc0/0x1e0 [amdgpu]
amdgpu_ih_process+0x81/0x100 [amdgpu]
amdgpu_irq_handler+0x26/0xa0 [amdgpu]
__handle_irq_event_percpu+0x49/0x190
? __hrtimer_get_next_event+0x4d/0x80
handle_irq_event_percpu+0x33/0x80
handle_irq_event+0x33/0x60
handle_edge_irq+0x82/0x190
asm_call_irq_on_stack+0x12/0x20
</IRQ>
common_interrupt+0xbb/0x140
asm_common_interrupt+0x1e/0x40
RIP: 0010:amdgpu_device_rreg.part.0+0x44/0xf0 [amdgpu]
Code: 53 48 89 fb 4c 3b af c8 08 00 00 73 6d 83 e2 02 75 0d f6 87 40 62 01 00 10 0f 85 83 00 00 00 4c 03 ab d0 08 00 00 45 8b 6d 00 <8b> 05 3e b6 52 00 85 c0 7e 62 48 8b 43 08 0f b7 70 3e 65 8b 05 e3
RSP: 0018:ffffae7740fff9e8 EFLAGS: 00000286
RAX: ffffffffc05ee610 RBX: ffff8aaf8f620000 RCX: 0000000000000006
RDX: 0000000000000000 RSI: 0000000000005430 RDI: ffff8aaf8f620000
RBP: ffffae7740fffa08 R08: 0000000000000001 R09: 000000000000000a
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000005430
R13: 0000000071000000 R14: 0000000000000001 R15: 0000000000005430
? amdgpu_cgs_write_register+0x20/0x20 [amdgpu]
amdgpu_device_rreg+0x17/0x20 [amdgpu]
amdgpu_cgs_read_register+0x14/0x20 [amdgpu]
dm_read_reg_func+0x38/0xb0 [amdgpu]
generic_reg_wait+0x80/0x160 [amdgpu]
dce_aux_transfer_raw+0x324/0x7c0 [amdgpu]
dc_link_aux_transfer_raw+0x43/0x50 [amdgpu]
dm_dp_aux_transfer+0x87/0x110 [amdgpu]
drm_dp_dpcd_access+0x72/0x110 [drm_kms_helper]
drm_dp_dpcd_read+0xb7/0xf0 [drm_kms_helper]
drm_dp_get_one_sb_msg+0x349/0x480 [drm_kms_helper]
drm_dp_mst_hpd_irq+0xc5/0xe40 [drm_kms_helper]
? drm_dp_mst_hpd_irq+0xc5/0xe40 [drm_kms_helper]
dm_handle_hpd_rx_irq+0x184/0x1a0 [amdgpu]
? dm_handle_hpd_rx_irq+0x184/0x1a0 [amdgpu]
handle_hpd_rx_irq+0x195/0x240 [amdgpu]
? __switch_to_asm+0x42/0x70
? __switch_to+0x131/0x450
dm_irq_work_func+0x19/0x20 [amdgpu]
process_one_work+0x209/0x400
worker_thread+0x4d/0x3e0
? cancel_delayed_work+0xa0/0xa0
kthread+0x124/0x160
? kthread_park+0x90/0x90
ret_from_fork+0x22/0x30

Reviewed-by: Aurabindo Jayamohanan Pillai <Aurabindo.Pillai@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Signed-off-by: Anson Jacob <Anson.Jacob@amd.com>
Cc: stable@vger.kernel.org
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amd/display: Remove invalid assert for ODM + MPC case

Reviewed-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@amd.com>
Acked-by: Anson Jacob <Anson.Jacob@amd.com>
Signed-off-by: Eric Bernstein <eric.bernstein@amd.com>
Cc: stable@vger.kernel.org
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amd/pm: bug fix for the runtime pm BACO

In some systems only MACO is supported. This is to fix the problem
that runtime pm is enabled but BACO is not supported. MACO will be
handled seperately.

Signed-off-by: Kenneth Feng <kenneth.feng@amd.com>
Reviewed-by: Jack Gui <Jack.Gui@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

drm/amdgpu: handle VCN instances when harvesting (v2)

There may be multiple instances and only one is harvested.

v2: fix typo in commit message

Fixes: 83a0b8639185 ("drm/amdgpu: add judgement when add ip blocks (v2)")
Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1673
Reviewed-by: Guchun Chen <guchun.chen@amd.com>
Reviewed-by: James Zhu <James.Zhu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org

Merge tag 'gvt-fixes-2021-08-10' of https://github.com/intel/gvt-linux into drm-intel-fixes

gvt-fixes-2021-08-10

- Fix windows VM hang issue for atomics workaround (Zhenyu)

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
From: Zhenyu Wang <zhenyuw@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210810050133.GO13928@zhen-hp.sh.intel.com

ALSA: hda/realtek: fix mute/micmute LEDs for HP ProBook 650 G8 Notebook PC

The HP ProBook 650 G8 Notebook PC is using ALC236 codec which is
using 0x02 to control mute LED and 0x01 to control micmute LED.
Therefore, add a quirk to make it works.

Signed-off-by: Jeremy Szu <jeremy.szu@canonical.com>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20210810100846.65844-1-jeremy.szu@canonical.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

Merge branch 'fdb-backpressure-fixes'

Vladimir Oltean says:

====================
Fix broken backpressure during FDB dump in DSA drivers

rtnl_fdb_dump() has logic to split a dump of PF_BRIDGE neighbors into
multiple netlink skbs if the buffer provided by user space is too small
(one buffer will typically handle a few hundred FDB entries).

When the current buffer becomes full, nlmsg_put() in
dsa_slave_port_fdb_do_dump() returns -EMSGSIZE and DSA saves the index
of the last dumped FDB entry, returns to rtnl_fdb_dump() up to that
point, and then the dump resumes on the same port with a new skb, and
FDB entries up to the saved index are simply skipped.

Since dsa_slave_port_fdb_do_dump() is pointed to by the "cb" passed to
drivers, then drivers must check for the -EMSGSIZE error code returned
by it. Otherwise, when a netlink skb becomes full, DSA will no longer
save newly dumped FDB entries to it, but the driver will continue
dumping. So FDB entries will be missing from the dump.

DSA is one of the few switchdev drivers that have an .ndo_fdb_dump
implementation, because of the assumption that the hardware and software
FDBs cannot be efficiently kept in sync via SWITCHDEV_FDB_ADD_TO_BRIDGE.
Other drivers with a home-cooked .ndo_fdb_dump implementation are
ocelot and dpaa2-switch. These appear to do the correct thing, as do the
other DSA drivers, so nothing else appears to need fixing.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

net: dsa: sja1105: fix broken backpressure in .port_fdb_dump

rtnl_fdb_dump() has logic to split a dump of PF_BRIDGE neighbors into
multiple netlink skbs if the buffer provided by user space is too small
(one buffer will typically handle a few hundred FDB entries).

When the current buffer becomes full, nlmsg_put() in
dsa_slave_port_fdb_do_dump() returns -EMSGSIZE and DSA saves the index
of the last dumped FDB entry, returns to rtnl_fdb_dump() up to that
point, and then the dump resumes on the same port with a new skb, and
FDB entries up to the saved index are simply skipped.

Since dsa_slave_port_fdb_do_dump() is pointed to by the "cb" passed to
drivers, then drivers must check for the -EMSGSIZE error code returned
by it. Otherwise, when a netlink skb becomes full, DSA will no longer
save newly dumped FDB entries to it, but the driver will continue
dumping. So FDB entries will be missing from the dump.

Fix the broken backpressure by propagating the "cb" return code and
allow rtnl_fdb_dump() to restart the FDB dump with a new skb.

Fixes: 291d1e72b756 ("net: dsa: sja1105: Add support for FDB and MDB management")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: dsa: lantiq: fix broken backpressure in .port_fdb_dump

rtnl_fdb_dump() has logic to split a dump of PF_BRIDGE neighbors into
multiple netlink skbs if the buffer provided by user space is too small
(one buffer will typically handle a few hundred FDB entries).

When the current buffer becomes full, nlmsg_put() in
dsa_slave_port_fdb_do_dump() returns -EMSGSIZE and DSA saves the index
of the last dumped FDB entry, returns to rtnl_fdb_dump() up to that
point, and then the dump resumes on the same port with a new skb, and
FDB entries up to the saved index are simply skipped.

Since dsa_slave_port_fdb_do_dump() is pointed to by the "cb" passed to
drivers, then drivers must check for the -EMSGSIZE error code returned
by it. Otherwise, when a netlink skb becomes full, DSA will no longer
save newly dumped FDB entries to it, but the driver will continue
dumping. So FDB entries will be missing from the dump.

Fix the broken backpressure by propagating the "cb" return code and
allow rtnl_fdb_dump() to restart the FDB dump with a new skb.

Fixes: 58c59ef9e930 ("net: dsa: lantiq: Add Forwarding Database access")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: dsa: lan9303: fix broken backpressure in .port_fdb_dump

rtnl_fdb_dump() has logic to split a dump of PF_BRIDGE neighbors into
multiple netlink skbs if the buffer provided by user space is too small
(one buffer will typically handle a few hundred FDB entries).

When the current buffer becomes full, nlmsg_put() in
dsa_slave_port_fdb_do_dump() returns -EMSGSIZE and DSA saves the index
of the last dumped FDB entry, returns to rtnl_fdb_dump() up to that
point, and then the dump resumes on the same port with a new skb, and
FDB entries up to the saved index are simply skipped.

Since dsa_slave_port_fdb_do_dump() is pointed to by the "cb" passed to
drivers, then drivers must check for the -EMSGSIZE error code returned
by it. Otherwise, when a netlink skb becomes full, DSA will no longer
save newly dumped FDB entries to it, but the driver will continue
dumping. So FDB entries will be missing from the dump.

Fix the broken backpressure by propagating the "cb" return code and
allow rtnl_fdb_dump() to restart the FDB dump with a new skb.

Fixes: ab335349b852 ("net: dsa: lan9303: Add port_fast_age and port_fdb_dump methods")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: dsa: hellcreek: fix broken backpressure in .port_fdb_dump

rtnl_fdb_dump() has logic to split a dump of PF_BRIDGE neighbors into
multiple netlink skbs if the buffer provided by user space is too small
(one buffer will typically handle a few hundred FDB entries).

When the current buffer becomes full, nlmsg_put() in
dsa_slave_port_fdb_do_dump() returns -EMSGSIZE and DSA saves the index
of the last dumped FDB entry, returns to rtnl_fdb_dump() up to that
point, and then the dump resumes on the same port with a new skb, and
FDB entries up to the saved index are simply skipped.

Since dsa_slave_port_fdb_do_dump() is pointed to by the "cb" passed to
drivers, then drivers must check for the -EMSGSIZE error code returned
by it. Otherwise, when a netlink skb becomes full, DSA will no longer
save newly dumped FDB entries to it, but the driver will continue
dumping. So FDB entries will be missing from the dump.

Fix the broken backpressure by propagating the "cb" return code and
allow rtnl_fdb_dump() to restart the FDB dump with a new skb.

Fixes: e4b27ebc780f ("net: dsa: Add DSA driver for Hirschmann Hellcreek switches")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Acked-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

bpf, core: Fix kernel-doc notation

Fix kernel-doc warnings in kernel/bpf/core.c (found by scripts/kernel-doc
and W=1 builds). That is, correct a function name in a comment and add
return descriptions for 2 functions.

Fixes these kernel-doc warnings:

  kernel/bpf/core.c:1372: warning: expecting prototype for __bpf_prog_run(). Prototype was for ___bpf_prog_run() instead
  kernel/bpf/core.c:1372: warning: No description found for return value of '___bpf_prog_run'
  kernel/bpf/core.c:1883: warning: No description found for return value of 'bpf_prog_select_runtime'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20210809215229.7556-1-rdunlap@infradead.org

net: igmp: fix data-race in igmp_ifc_timer_expire()

Fix the data-race reported by syzbot [1]
Issue here is that igmp_ifc_timer_expire() can update in_dev->mr_ifc_count
while another change just occured from another context.

in_dev->mr_ifc_count is only 8bit wide, so the race had little
consequences.

[1]
BUG: KCSAN: data-race in igmp_ifc_event / igmp_ifc_timer_expire

write to 0xffff8881051e3062 of 1 bytes by task 12547 on cpu 0:
igmp_ifc_event+0x1d5/0x290 net/ipv4/igmp.c:821
igmp_group_added+0x462/0x490 net/ipv4/igmp.c:1356
____ip_mc_inc_group+0x3ff/0x500 net/ipv4/igmp.c:1461
__ip_mc_join_group+0x24d/0x2c0 net/ipv4/igmp.c:2199
ip_mc_join_group_ssm+0x20/0x30 net/ipv4/igmp.c:2218
do_ip_setsockopt net/ipv4/ip_sockglue.c:1285 [inline]
ip_setsockopt+0x1827/0x2a80 net/ipv4/ip_sockglue.c:1423
tcp_setsockopt+0x8c/0xa0 net/ipv4/tcp.c:3657
sock_common_setsockopt+0x5d/0x70 net/core/sock.c:3362
__sys_setsockopt+0x18f/0x200 net/socket.c:2159
__do_sys_setsockopt net/socket.c:2170 [inline]
__se_sys_setsockopt net/socket.c:2167 [inline]
__x64_sys_setsockopt+0x62/0x70 net/socket.c:2167
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae

read to 0xffff8881051e3062 of 1 bytes by interrupt on cpu 1:
igmp_ifc_timer_expire+0x706/0xa30 net/ipv4/igmp.c:808
call_timer_fn+0x2e/0x1d0 kernel/time/timer.c:1419
expire_timers+0x135/0x250 kernel/time/timer.c:1464
__run_timers+0x358/0x420 kernel/time/timer.c:1732
run_timer_softirq+0x19/0x30 kernel/time/timer.c:1745
__do_softirq+0x12c/0x26e kernel/softirq.c:558
invoke_softirq kernel/softirq.c:432 [inline]
__irq_exit_rcu+0x9a/0xb0 kernel/softirq.c:636
sysvec_apic_timer_interrupt+0x69/0x80 arch/x86/kernel/apic/apic.c:1100
asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
console_unlock+0x8e8/0xb30 kernel/printk/printk.c:2646
vprintk_emit+0x125/0x3d0 kernel/printk/printk.c:2174
vprintk_default+0x22/0x30 kernel/printk/printk.c:2185
vprintk+0x15a/0x170 kernel/printk/printk_safe.c:392
printk+0x62/0x87 kernel/printk/printk.c:2216
selinux_netlink_send+0x399/0x400 security/selinux/hooks.c:6041
security_netlink_send+0x42/0x90 security/security.c:2070
netlink_sendmsg+0x59e/0x7c0 net/netlink/af_netlink.c:1919
sock_sendmsg_nosec net/socket.c:703 [inline]
sock_sendmsg net/socket.c:723 [inline]
____sys_sendmsg+0x360/0x4d0 net/socket.c:2392
___sys_sendmsg net/socket.c:2446 [inline]
__sys_sendmsg+0x1ed/0x270 net/socket.c:2475
__do_sys_sendmsg net/socket.c:2484 [inline]
__se_sys_sendmsg net/socket.c:2482 [inline]
__x64_sys_sendmsg+0x42/0x50 net/socket.c:2482
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0x90 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae

value changed: 0x01 -> 0x02

Reported by Kernel Concurrency Sanitizer on:
CPU: 1 PID: 12539 Comm: syz-executor.1 Not tainted 5.14.0-rc4-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: Fix memory leak in ieee802154_raw_deliver

If IEEE-802.15.4-RAW is closed before receive skb, skb is leaked.
Fix this, by freeing sk_receive_queue in sk->sk_destruct().

syzbot report:
BUG: memory leak
unreferenced object 0xffff88810f644600 (size 232):
  comm "softirq", pid 0, jiffies 4294967032 (age 81.270s)
  hex dump (first 32 bytes):
    10 7d 4b 12 81 88 ff ff 10 7d 4b 12 81 88 ff ff  .}K......}K.....
    00 00 00 00 00 00 00 00 40 7c 4b 12 81 88 ff ff  ........@|K.....
  backtrace:
    [<ffffffff83651d4a>] skb_clone+0xaa/0x2b0 net/core/skbuff.c:1496
    [<ffffffff83fe1b80>] ieee802154_raw_deliver net/ieee802154/socket.c:369 [inline]
    [<ffffffff83fe1b80>] ieee802154_rcv+0x100/0x340 net/ieee802154/socket.c:1070
    [<ffffffff8367cc7a>] __netif_receive_skb_one_core+0x6a/0xa0 net/core/dev.c:5384
    [<ffffffff8367cd07>] __netif_receive_skb+0x27/0xa0 net/core/dev.c:5498
    [<ffffffff8367cdd9>] netif_receive_skb_internal net/core/dev.c:5603 [inline]
    [<ffffffff8367cdd9>] netif_receive_skb+0x59/0x260 net/core/dev.c:5662
    [<ffffffff83fe6302>] ieee802154_deliver_skb net/mac802154/rx.c:29 [inline]
    [<ffffffff83fe6302>] ieee802154_subif_frame net/mac802154/rx.c:102 [inline]
    [<ffffffff83fe6302>] __ieee802154_rx_handle_packet net/mac802154/rx.c:212 [inline]
    [<ffffffff83fe6302>] ieee802154_rx+0x612/0x620 net/mac802154/rx.c:284
    [<ffffffff83fe59a6>] ieee802154_tasklet_handler+0x86/0xa0 net/mac802154/main.c:35
    [<ffffffff81232aab>] tasklet_action_common.constprop.0+0x5b/0x100 kernel/softirq.c:557
    [<ffffffff846000bf>] __do_softirq+0xbf/0x2ab kernel/softirq.c:345
    [<ffffffff81232f4c>] do_softirq kernel/softirq.c:248 [inline]
    [<ffffffff81232f4c>] do_softirq+0x5c/0x80 kernel/softirq.c:235
    [<ffffffff81232fc1>] __local_bh_enable_ip+0x51/0x60 kernel/softirq.c:198
    [<ffffffff8367a9a4>] local_bh_enable include/linux/bottom_half.h:32 [inline]
    [<ffffffff8367a9a4>] rcu_read_unlock_bh include/linux/rcupdate.h:745 [inline]
    [<ffffffff8367a9a4>] __dev_queue_xmit+0x7f4/0xf60 net/core/dev.c:4221
    [<ffffffff83fe2db4>] raw_sendmsg+0x1f4/0x2b0 net/ieee802154/socket.c:295
    [<ffffffff8363af16>] sock_sendmsg_nosec net/socket.c:654 [inline]
    [<ffffffff8363af16>] sock_sendmsg+0x56/0x80 net/socket.c:674
    [<ffffffff8363deec>] __sys_sendto+0x15c/0x200 net/socket.c:1977
    [<ffffffff8363dfb6>] __do_sys_sendto net/socket.c:1989 [inline]
    [<ffffffff8363dfb6>] __se_sys_sendto net/socket.c:1985 [inline]
    [<ffffffff8363dfb6>] __x64_sys_sendto+0x26/0x30 net/socket.c:1985

Fixes: 9ec767160357 ("net: add IEEE 802.15.4 socket family implementation")
Reported-and-tested-by: syzbot+1f68113fa907bf0695a8@syzkaller.appspotmail.com
Signed-off-by: Takeshi Misawa <jeliantsurux@gmail.com>
Acked-by: Alexander Aring <aahringo@redhat.com>
Link: https://lore.kernel.org/r/20210805075414.GA15796@DESKTOP
Signed-off-by: Stefan Schmidt <stefan@datenfreihafen.org>

Merge branch 'ks8795-vlan-fixes'

Ben Hutchings says:

====================
ksz8795 VLAN fixes

This series fixes a number of bugs in the ksz8795 driver that affect
VLAN filtering, tag insertion, and tag removal.

I've tested these on the KSZ8795CLXD evaluation board, and checked the
register usage against the datasheets for the other supported chips.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

net: dsa: microchip: ksz8795: Don't use phy_port_cnt in VLAN table lookup

The magic number 4 in VLAN table lookup was the number of entries we
can read and write at once. Using phy_port_cnt here doesn't make
sense and presumably broke VLAN filtering for 3-port switches. Change
it back to 4.

Fixes: 4ce2a984abd8 ("net: dsa: microchip: ksz8795: use phy_port_cnt ...")
Signed-off-by: Ben Hutchings <ben.hutchings@mind.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: dsa: microchip: ksz8795: Fix VLAN filtering

Currently ksz8_port_vlan_filtering() sets or clears the VLAN Enable
hardware flag. That controls discarding of packets with a VID that
has not been enabled for any port on the switch.

Since it is a global flag, set the dsa_switch::vlan_filtering_is_global
flag so that the DSA core understands this can't be controlled per
port.

When VLAN filtering is enabled, the switch should also discard packets
with a VID that's not enabled on the ingress port. Set or clear each
external port's VLAN Ingress Filter flag in ksz8_port_vlan_filtering()
to make that happen.

Fixes: e66f840c08a2 ("net: dsa: ksz: Add Microchip KSZ8795 DSA driver")
Signed-off-by: Ben Hutchings <ben.hutchings@mind.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: dsa: microchip: ksz8795: Use software untagging on CPU port

On the CPU port, we can support both tagged and untagged VLANs at the
same time by doing any necessary untagging in software rather than
hardware. To enable that, keep the CPU port's Remove Tag flag cleared
and set the dsa_switch::untag_bridge_pvid flag.

Fixes: e66f840c08a2 ("net: dsa: ksz: Add Microchip KSZ8795 DSA driver")
Signed-off-by: Ben Hutchings <ben.hutchings@mind.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: dsa: microchip: ksz8795: Fix VLAN untagged flag change on deletion

When a VLAN is deleted from a port, the flags in struct
switchdev_obj_port_vlan are always 0. ksz8_port_vlan_del() copies the
BRIDGE_VLAN_INFO_UNTAGGED flag to the port's Tag Removal flag, and
therefore always clears it.

In case there are multiple VLANs configured as untagged on this port -
which seems useless, but is allowed - deleting one of them changes the
remaining VLANs to be tagged.

It's only ever necessary to change this flag when a VLAN is added to
the port, so leave it unchanged in ksz8_port_vlan_del().

Fixes: e66f840c08a2 ("net: dsa: ksz: Add Microchip KSZ8795 DSA driver")
Signed-off-by: Ben Hutchings <ben.hutchings@mind.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: dsa: microchip: ksz8795: Reject unsupported VLAN configuration

The switches supported by ksz8795 only have a per-port flag for Tag
Removal.  This means it is not possible to support both tagged and
untagged VLANs on the same port.  Reject attempts to add a VLAN that
requires the flag to be changed, unless there are no VLANs currently
configured.

VID 0 is excluded from this check since it is untagged regardless of
the state of the flag.

On the CPU port we could support tagged and untagged VLANs at the same
time.  This will be enabled by a later patch.

Fixes: e66f840c08a2 ("net: dsa: ksz: Add Microchip KSZ8795 DSA driver")
Signed-off-by: Ben Hutchings <ben.hutchings@mind.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: dsa: microchip: ksz8795: Fix PVID tag insertion

ksz8795 has never actually enabled PVID tag insertion, and it also
programmed the PVID incorrectly.  To fix this:

* Allow tag insertion to be controlled per ingress port.  On most
  chips, set bit 2 in Global Control 19.  On KSZ88x3 this control
  flag doesn't exist.

* When adding a PVID:
  - Set the appropriate register bits to enable tag insertion on
    egress at every other port if this was the packet's ingress port.
  - Mask *out* the VID from the default tag, before or-ing in the new
    PVID.

* When removing a PVID:
  - Clear the same control bits to disable tag insertion.
  - Don't update the default tag.  This wasn't doing anything useful.

Fixes: e66f840c08a2 ("net: dsa: ksz: Add Microchip KSZ8795 DSA driver")
Signed-off-by: Ben Hutchings <ben.hutchings@mind.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

net: dsa: microchip: Fix ksz_read64()

ksz_read64() currently does some dubious byte-swapping on the two
halves of a 64-bit register, and then only returns the high bits.
Replace this with a straightforward expression.

Fixes: e66f840c08a2 ("net: dsa: ksz: Add Microchip KSZ8795 DSA driver")
Signed-off-by: Ben Hutchings <ben.hutchings@mind.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge tag 'linux-can-fixes-for-5.14-20210810' of git://git./linux/kernel/git/mkl/linux-can

linux-can-fixes-for-5.14-20210810

Marc Kleine-Budde says:

====================
pull-request: can 2021-08-10

this is a pull request of 2 patches for net/master.

Baruch Siach's patch fixes a typo for the Microchip CAN BUS Analyzer
Tool entry in the MAINTAINERS file.

Hussein Alasadi fixes the setting of the M_CAN_DBTP register in the
m_can driver. The regression git mainline in v5.14-rc1, so no backport
to stable is needed.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

Merge tag 'mlx5-fixes-2021-08-09' of git://git./linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
mlx5 fixes 2021-08-09

This series introduces fixes to mlx5 driver.
Please pull and let me know if there is any problem.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

Merge branch '100GbE' of git://git./linux/kernel/git/tnguy/net-queue

Tony Nguyen says:

====================
Intel Wired LAN Driver Updates 2021-08-09

This series contains updates to ice and iavf drivers.

Ani prevents the ice driver from accidentally being probed to a virtual
function and stops processing of VF messages when VFs are being torn
down.

Brett prevents the ice driver from deleting is own MAC address.

Fahad ensures the RSS LUT and key are always set following reset for
iavf.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

bpf: Fix potentially incorrect results with bpf_get_local_storage()

Commit b910eaaaa4b8 ("bpf: Fix NULL pointer dereference in bpf_get_local_storage()
helper") fixed a bug for bpf_get_local_storage() helper so different tasks
won't mess up with each other's percpu local storage.

The percpu data contains 8 slots so it can hold up to 8 contexts (same or
different tasks), for 8 different program runs, at the same time. This in
general is sufficient. But our internal testing showed the following warning
multiple times:

  [...]
  warning: WARNING: CPU: 13 PID: 41661 at include/linux/bpf-cgroup.h:193
     __cgroup_bpf_run_filter_sock_ops+0x13e/0x180
  RIP: 0010:__cgroup_bpf_run_filter_sock_ops+0x13e/0x180
  <IRQ>
   tcp_call_bpf.constprop.99+0x93/0xc0
   tcp_conn_request+0x41e/0xa50
   ? tcp_rcv_state_process+0x203/0xe00
   tcp_rcv_state_process+0x203/0xe00
   ? sk_filter_trim_cap+0xbc/0x210
   ? tcp_v6_inbound_md5_hash.constprop.41+0x44/0x160
   tcp_v6_do_rcv+0x181/0x3e0
   tcp_v6_rcv+0xc65/0xcb0
   ip6_protocol_deliver_rcu+0xbd/0x450
   ip6_input_finish+0x11/0x20
   ip6_input+0xb5/0xc0
   ip6_sublist_rcv_finish+0x37/0x50
   ip6_sublist_rcv+0x1dc/0x270
   ipv6_list_rcv+0x113/0x140
   __netif_receive_skb_list_core+0x1a0/0x210
   netif_receive_skb_list_internal+0x186/0x2a0
   gro_normal_list.part.170+0x19/0x40
   napi_complete_done+0x65/0x150
   mlx5e_napi_poll+0x1ae/0x680
   __napi_poll+0x25/0x120
   net_rx_action+0x11e/0x280
   __do_softirq+0xbb/0x271
   irq_exit_rcu+0x97/0xa0
   common_interrupt+0x7f/0xa0
   </IRQ>
   asm_common_interrupt+0x1e/0x40
  RIP: 0010:bpf_prog_1835a9241238291a_tw_egress+0x5/0xbac
   ? __cgroup_bpf_run_filter_skb+0x378/0x4e0
   ? do_softirq+0x34/0x70
   ? ip6_finish_output2+0x266/0x590
   ? ip6_finish_output+0x66/0xa0
   ? ip6_output+0x6c/0x130
   ? ip6_xmit+0x279/0x550
   ? ip6_dst_check+0x61/0xd0
  [...]

Using drgn [0] to dump the percpu buffer contents showed that on this CPU
slot 0 is still available, but slots 1-7 are occupied and those tasks in
slots 1-7 mostly don't exist any more. So we might have issues in
bpf_cgroup_storage_unset().

Further debugging confirmed that there is a bug in bpf_cgroup_storage_unset().
Currently, it tries to unset "current" slot with searching from the start.
So the following sequence is possible:

  1. A task is running and claims slot 0
  2. Running BPF program is done, and it checked slot 0 has the "task"
     and ready to reset it to NULL (not yet).
  3. An interrupt happens, another BPF program runs and it claims slot 1
     with the *same* task.
  4. The unset() in interrupt context releases slot 0 since it matches "task".
  5. Interrupt is done, the task in process context reset slot 0.

At the end, slot 1 is not reset and the same process can continue to occupy
slots 2-7 and finally, when the above step 1-5 is repeated again, step 3 BPF
program won't be able to claim an empty slot and a warning will be issued.

To fix the issue, for unset() function, we should traverse from the last slot
to the first. This way, the above issue can be avoided.

The same reverse traversal should also be done in bpf_get_local_storage() helper
itself. Otherwise, incorrect local storage may be returned to BPF program.

  [0] https://github.com/osandov/drgn

Fixes: b910eaaaa4b8 ("bpf: Fix NULL pointer dereference in bpf_get_local_storage() helper")
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210810010413.1976277-1-yhs@fb.com

ovl: prevent private clone if bind mount is not allowed

Add the following checks from __do_loopback() to clone_private_mount() as
well:

- verify that the mount is in the current namespace

- verify that there are no locked children

Reported-by: Alois Wohlschlager <alois1@gmx-topmail.de>
Fixes: c771d683a62e ("vfs: introduce clone_private_mount()")
Cc: <stable@vger.kernel.org> # v3.18
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

ovl: fix uninitialized pointer read in ovl_lookup_real_one()

One error path can result in release_dentry_name_snapshot() being called
before "name" was initialized by take_dentry_name_snapshot().

Fix by moving the release_dentry_name_snapshot() to immediately after the
only use.

Reported-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

ovl: fix deadlock in splice write

There's possibility of an ABBA deadlock in case of a splice write to an
overlayfs file and a concurrent splice write to a corresponding real file.

The call chain for splice to an overlay file:

-> do_splice                     [takes sb_writers on overlay file]
   -> do_splice_from
     -> iter_file_splice_write    [takes pipe->mutex]
       -> vfs_iter_write
         ...
         -> ovl_write_iter        [takes sb_writers on real file]

And the call chain for splice to a real file:

-> do_splice                     [takes sb_writers on real file]
   -> do_splice_from
     -> iter_file_splice_write    [takes pipe->mutex]

Syzbot successfully bisected this to commit 82a763e61e2b ("ovl: simplify
file splice").

Fix by reverting the write part of the above commit and by adding missing
bits from ovl_write_iter() into ovl_splice_write().

Fixes: 82a763e61e2b ("ovl: simplify file splice")
Reported-and-tested-by: syzbot+579885d1a9a833336209@syzkaller.appspotmail.com
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

ovl: skip stale entries in merge dir cache iteration

On the first getdents call, ovl_iterate() populates the readdir cache
with a list of entries, but for upper entries with origin lower inode,
p->ino remains zero.

Following getdents calls traverse the readdir cache list and call
ovl_cache_update_ino() for entries with zero p->ino to lookup the entry
in the overlay and return d_ino that is consistent with st_ino.

If the upper file was unlinked between the first getdents call and the
getdents call that lists the file entry, ovl_cache_update_ino() will not
find the entry and fall back to setting d_ino to the upper real st_ino,
which is inconsistent with how this object was presented to users.

Instead of listing a stale entry with inconsistent d_ino, simply skip
the stale entry, which is better for users.

xfstest overlay/077 is failing without this patch.

Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Link: https://lore.kernel.org/fstests/CAOQ4uxgR_cLnC_vdU5=seP3fwqVkuZM_-WfD6maFTMbMYq=a9w@mail.gmail.com/
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

bpf: Add missing bpf_read_[un]lock_trace() for syscall program

Commit 79a7f8bdb159d ("bpf: Introduce bpf_sys_bpf() helper and program type.")
added support for syscall program, which is a sleepable program.

But the program run missed bpf_read_lock_trace()/bpf_read_unlock_trace(),
which is needed to ensure proper rcu callback invocations. This patch adds
bpf_read_[un]lock_trace() properly.

Fixes: 79a7f8bdb159d ("bpf: Introduce bpf_sys_bpf() helper and program type.")
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210809235151.1663680-1-yhs@fb.com

bpf: Add lockdown check for probe_write_user helper

Back then, commit 96ae52279594 ("bpf: Add bpf_probe_write_user BPF helper
to be called in tracers") added the bpf_probe_write_user() helper in order
to allow to override user space memory. Its original goal was to have a
facility to "debug, divert, and manipulate execution of semi-cooperative
processes" under CAP_SYS_ADMIN. Write to kernel was explicitly disallowed
since it would otherwise tamper with its integrity.

One use case was shown in cf9b1199de27 ("samples/bpf: Add test/example of
using bpf_probe_write_user bpf helper") where the program DNATs traffic
at the time of connect(2) syscall, meaning, it rewrites the arguments to
a syscall while they're still in userspace, and before the syscall has a
chance to copy the argument into kernel space. These days we have better
mechanisms in BPF for achieving the same (e.g. for load-balancers), but
without having to write to userspace memory.

Of course the bpf_probe_write_user() helper can also be used to abuse
many other things for both good or bad purpose. Outside of BPF, there is
a similar mechanism for ptrace(2) such as PTRACE_PEEK{TEXT,DATA} and
PTRACE_POKE{TEXT,DATA}, but would likely require some more effort.
Commit 96ae52279594 explicitly dedicated the helper for experimentation
purpose only. Thus, move the helper's availability behind a newly added
LOCKDOWN_BPF_WRITE_USER lockdown knob so that the helper is disabled under
the "integrity" mode. More fine-grained control can be implemented also
from LSM side with this change.

Fixes: 96ae52279594 ("bpf: Add bpf_probe_write_user BPF helper to be called in tracers")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andrii@kernel.org>

drm/meson: fix colour distortion from HDR set during vendor u-boot

Add support for the OSD1 HDR registers so meson DRM can handle the HDR
properties set by Amlogic u-boot on G12A and newer devices which result
in blue/green/pink colour distortion to display output.

This takes the original patch submissions from Mathias [0] and [1] with
corrections for formatting and the missing description and attribution
needed for merge.

[0] https://lore.kernel.org/linux-amlogic/59dfd7e6-fc91-3d61-04c4-94e078a3188c@baylibre.com/T/
[1] https://lore.kernel.org/linux-amlogic/CAOKfEHBx_fboUqkENEMd-OC-NSrf46nto+vDLgvgttzPe99kXg@mail.gmail.com/T/#u

Fixes: 728883948b0d ("drm/meson: Add G12A Support for VIU setup")
Suggested-by: Mathias Steiger <mathias.steiger@googlemail.com>
Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
Tested-by: Neil Armstrong <narmstrong@baylibre.com>
Tested-by: Philip Milev <milev.philip@gmail.com>
[narmsrong: adding missing space on second tested-by tag]
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210806094005.7136-1-christianshewitt@gmail.com

can: m_can: m_can_set_bittiming(): fix setting M_CAN_DBTP register

This patch fixes the setting of the M_CAN_DBTP register contents:
- use DBTP_ (the data bitrate macros) instead of NBTP_ which area used
for the nominal bitrate
- do not overwrite possibly-existing DBTP_TDC flag by ORing reg_btp
instead of overwriting

Link: https://lore.kernel.org/r/FRYP281MB06140984ABD9994C0AAF7433D1F69@FRYP281MB0614.DEUP281.PROD.OUTLOOK.COM
Fixes: 20779943a080 ("can: m_can: use bits.h macros for all regmasks")
Cc: Torin Cooper-Bennun <torin@maxiluxsystems.com>
Cc: Chandrasekar Ramakrishnan <rcsekar@samsung.com>
Signed-off-by: Hussein Alasadi <alasadi@arecs.eu>
[mkl: update patch description, update indention]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

MAINTAINERS: fix Microchip CAN BUS Analyzer Tool entry typo

This patch fixes the abbreviated name of the Microchip CAN BUS
Analyzer Tool.

Fixes: 8a7b46fa7902 ("MAINTAINERS: add Yasushi SHOJI as reviewer for the Microchip CAN BUS Analyzer Tool driver")
Link: https://lore.kernel.org/r/cc4831cb1c8759c15fb32c21fd326e831183733d.1627876781.git.baruch@tkos.co.il
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

net/mlx5: Fix return value from tracer initialization

Check return value of mlx5_fw_tracer_start(), set error path and fix
return value of mlx5_fw_tracer_init() accordingly.

Fixes: c71ad41ccb0c ("net/mlx5: FW tracer, events handling")
Signed-off-by: Aya Levin <ayal@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

net/mlx5: Synchronize correct IRQ when destroying CQ

The CQ destroy is performed based on the IRQ number that is stored in
cq->irqn. That number wasn't set explicitly during CQ creation and as
expected some of the API users of mlx5_core_create_cq() forgot to update
it.

This caused to wrong synchronization call of the wrong IRQ with a number
0 instead of the real one.

As a fix, set the IRQ number directly in the mlx5_core_create_cq() and
update all users accordingly.

Fixes: 1a86b377aa21 ("vdpa/mlx5: Add VDPA driver for supported mlx5 devices")
Fixes: ef1659ade359 ("IB/mlx5: Add DEVX support for CQ events")
Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

net/mlx5e: TC, Fix error handling memory leak

Free the offload sample action on error.

Fixes: f94d6389f6a8 ("net/mlx5e: TC, Add support to offload sample action")
Signed-off-by: Chris Mi <cmi@nvidia.com>
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

net/mlx5: Destroy pool->mutex

Destroy pool->mutex when we destroy the pool.

Fixes: c36326d38d93 ("net/mlx5: Round-Robin EQs over IRQs")
Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Parav Pandit <parav@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

net/mlx5: Set all field of mlx5_irq before inserting it to the xarray

Currently irq->pool is set after the irq is insert to the xarray.
Set irq->pool before the irq is inserted to the xarray.

Fixes: 71e084e26414 ("net/mlx5: Allocating a pool of MSI-X vectors for SFs")
Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Parav Pandit <parav@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

net/mlx5: Fix order of functions in mlx5_irq_detach_nb()

Change order of functions in mlx5_irq_detach_nb() so it will be
a mirror of mlx5_irq_attach_nb.

Fixes: 71e084e26414 ("net/mlx5: Allocating a pool of MSI-X vectors for SFs")
Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Parav Pandit <parav@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

net/mlx5: Block switchdev mode while devlink traps are active

Since switchdev mode can't support devlink traps, verify there are
no active devlink traps before moving eswitch to switchdev mode. If
there are active traps, prevent the switchdev mode configuration.

Fixes: eb3862a0525d ("net/mlx5e: Enable traps according to link state")
Signed-off-by: Aya Levin <ayal@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

net/mlx5e: Destroy page pool after XDP SQ to fix use-after-free

mlx5e_close_xdpsq does the cleanup: it calls mlx5e_free_xdpsq_descs to
free the outstanding descriptors, which relies on
mlx5e_page_release_dynamic and page_pool_release_page. However,
page_pool_destroy is already called by this point, because
mlx5e_close_rq runs before mlx5e_close_xdpsq.

This commit fixes the use-after-free by swapping mlx5e_close_xdpsq and
mlx5e_close_rq.

The commit cited below started calling page_pool_destroy directly from
the driver. Previously, the page pool was destroyed under a call_rcu
from xdp_rxq_info_unreg_mem_model, which would defer the deallocation
until after the XDPSQ is cleaned up.

Fixes: 1da4bbeffe41 ("net: core: page_pool: add user refcnt and reintroduce page_pool_destroy")
Signed-off-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

net/mlx5: Bridge, fix ageing time

Ageing time is not converted from clock_t to jiffies which results
incorrect ageing timeout calculation in workqueue update task. Fix it by
applying clock_t_to_jiffies() to provided value.

Fixes: c636a0f0f3f0 ("net/mlx5: Bridge, dynamic entry ageing")
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

net/mlx5e: Avoid creating tunnel headers for local route

It could be local and remote are on the same machine and the route
result will be a local route which will result in creating encap id
with src/dst mac address of 0.

Fixes: a54e20b4fcae ("net/mlx5e: Add basic TC tunnel set action for SRIOV offloads")
Signed-off-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

net/mlx5: DR, Add fail on error check on decap

While processing encapsulated packet on RX, one of the fields that is
checked is the inner packet length. If the length as specified in the header
doesn't match the actual inner packet length, the packet is invalid
and should be dropped. However, such packet caused the NIC to hang.

This patch turns on a 'fail_on_error' HW bit which allows HW to drop
such an invalid packet while processing RX packet and trying to decap it.

Fixes: ad17dc8cf910 ("net/mlx5: DR, Move STEv0 action apply logic")
Signed-off-by: Alex Vesker <valex@nvidia.com>
Signed-off-by: Yevgeny Kliteynik <kliteyn@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

net/mlx5: Don't skip subfunction cleanup in case of error in module init

Clean SF resources if mlx5 eth failed to initialize.

Fixes: 1958fc2f0712 ("net/mlx5: SF, Add auxiliary device driver")
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Parav Pandit <parav@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Merge branch 'for-5.14-fixes' of git://git./linux/kernel/git/tj/cgroup

Pull cgroup fix from Tejun Heo:
"One commit to fix a possible A-A deadlock around u64_stats_sync on
  32bit machines caused by updating it without disabling IRQ when it may
  be read from IRQ context"

* 'for-5.14-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup:
  cgroup: rstat: fix A-A deadlock on 32bit around u64_stats_sync

bareudp: Fix invalid read beyond skb's linear data

Data beyond the UDP header might not be part of the skb's linear data.
Use skb_copy_bits() instead of direct access to skb->data+X, so that
we read the correct bytes even on a fragmented skb.

Fixes: 4b5f67232d95 ("net: Special handling for IP & MPLS.")
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Link: https://lore.kernel.org/r/7741c46545c6ef02e70c80a9b32814b22d9616b3.1628264975.git.gnault@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

net: openvswitch: fix kernel-doc warnings in flow.c

Repair kernel-doc notation in a few places to make it conform to
the expected format.

Fixes the following kernel-doc warnings:

flow.c:296: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
* Parse vlan tag from vlan header.
flow.c:296: warning: missing initial short description on line:
* Parse vlan tag from vlan header.
flow.c:537: warning: No description found for return value of 'key_extract_l3l4'
flow.c:769: warning: No description found for return value of 'key_extract'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Pravin B Shelar <pshelar@ovn.org>
Cc: dev@openvswitch.org
Link: https://lore.kernel.org/r/20210808190834.23362-1-rdunlap@infradead.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

psample: Add a fwd declaration for skbuff

Without this there is a warning if source files include psample.h
before skbuff.h or doesn't include it at all.

Fixes: 6ae0a6286171 ("net: Introduce psample, a new genetlink channel for packet sampling")
Signed-off-by: Roi Dayan <roid@nvidia.com>
Link: https://lore.kernel.org/r/20210808065242.1522535-1-roid@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

MAINTAINERS: update Vineet's email address

I'll be leaving Synopsys shortly, but will continue to handle maintenance
for the transition period.

Signed-off-by: Vineet Gupta <vgupta@kernel.org>

ucounts: add missing data type changes

commit f9c82a4ea89c3 ("Increase size of ucounts to atomic_long_t")
changed the data type of ucounts/ucounts_max to long, but missed to
adjust a few other places. This is noticeable on big endian platforms
from user space because the /proc/sys/user/max_*_names files all
contain 0.

v4 - Made the min and max constants long so the sysctl values
are actually settable on little endian machines.
-- EWB

Fixes: f9c82a4ea89c ("Increase size of ucounts to atomic_long_t")
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Tested-by: Linux Kernel Functional Testing <lkft@linaro.org>
Acked-by: Alexey Gladkov <legion@kernel.org>
v1: https://lkml.kernel.org/r/20210721115800.910778-1-svens@linux.ibm.com
v2: https://lkml.kernel.org/r/20210721125233.1041429-1-svens@linux.ibm.com
v3: https://lkml.kernel.org/r/20210730062854.3601635-1-svens@linux.ibm.com
Link: https://lkml.kernel.org/r/8735rijqlv.fsf_-_@disp2133
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

bpf: Add _kernel suffix to internal lockdown_bpf_read

Rename LOCKDOWN_BPF_READ into LOCKDOWN_BPF_READ_KERNEL so we have naming
more consistent with a LOCKDOWN_BPF_WRITE_USER option that we are adding.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andrii@kernel.org>

iavf: Set RSS LUT and key in reset handle path

iavf driver should set RSS LUT and key unconditionally in reset
path. Currently, the driver does not do that. This patch fixes
this issue.

Fixes: 2c86ac3c7079 ("i40evf: create a generic config RSS function")
Signed-off-by: Md Fahad Iqbal Polash <md.fahad.iqbal.polash@intel.com>
Tested-by: Konrad Jankowski <konrad0.jankowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

ice: don't remove netdev->dev_addr from uc sync list

In some circumstances, such as with bridging, it's possible that the
stack will add the device's own MAC address to its unicast address list.

If, later, the stack deletes this address, the driver will receive a
request to remove this address.

The driver stores its current MAC address as part of the VSI MAC filter
list instead of separately. So, this causes a problem when the device's
MAC address is deleted unexpectedly, which results in traffic failure in
some cases.

The following configuration steps will reproduce the previously
mentioned problem:

> ip link set eth0 up
> ip link add dev br0 type bridge
> ip link set br0 up
> ip addr flush dev eth0
> ip link set eth0 master br0
> echo 1 > /sys/class/net/br0/bridge/vlan_filtering
> modprobe -r veth
> modprobe -r bridge
> ip addr add 192.168.1.100/24 dev eth0

The following ping command fails due to the netdev->dev_addr being
deleted when removing the bridge module.
> ping <link partner>

Fix this by making sure to not delete the netdev->dev_addr during MAC
address sync. After fixing this issue it was noticed that the
netdev_warn() in .set_mac was overly verbose, so make it at
netdev_dbg().

Also, there is a possibility of a race condition between .set_mac and
.set_rx_mode. Fix this by calling netif_addr_lock_bh() and
netif_addr_unlock_bh() on the device's netdev when the netdev->dev_addr
is going to be updated in .set_mac.

Fixes: e94d44786693 ("ice: Implement filter sync, NDO operations and bump version")
Signed-off-by: Brett Creeley <brett.creeley@intel.com>
Tested-by: Liang Li <liali@redhat.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

ice: Stop processing VF messages during teardown

When VFs are setup and torn down in quick succession, it is possible
that a VF is torn down by the PF while the VF's virtchnl requests are
still in the PF's mailbox ring. Processing the VF's virtchnl request
when the VF itself doesn't exist results in undefined behavior. Fix
this by adding a check to stop processing virtchnl requests when VF
teardown is in progress.

Fixes: ddf30f7ff840 ("ice: Add handler to configure SR-IOV")
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Konrad Jankowski <konrad0.jankowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

ice: Prevent probing virtual functions

The userspace utility "driverctl" can be used to change/override the
system's default driver choices. This is useful in some situations
(buggy driver, old driver missing a device ID, trying a workaround,
etc.) where the user needs to load a different driver.

However, this is also prone to user error, where a driver is mapped
to a device it's not designed to drive. For example, if the ice driver
is mapped to driver iavf devices, the ice driver crashes.

Add a check to return an error if the ice driver is being used to
probe a virtual function.

Fixes: 837f08fdecbe ("ice: Add basic driver framework for Intel(R) E800 Series")
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Gurucharan G <gurucharanx.g@intel.com>
Tested-by: Konrad Jankowski <konrad0.jankowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

net: sched: act_mirred: Reset ct info when mirror/redirect skb

When mirror/redirect a skb to a different port, the ct info should be reset
for reclassification. Or the pkts will match unexpected rules. For example,
with following topology and commands:

    -----------
              |
       veth0 -+-------
              |
       veth1 -+-------
              |
   ------------

tc qdisc add dev veth0 clsact
# The same with "action mirred egress mirror dev veth1" or "action mirred ingress redirect dev veth1"
tc filter add dev veth0 egress chain 1 protocol ip flower ct_state +trk action mirred ingress mirror dev veth1
tc filter add dev veth0 egress chain 0 protocol ip flower ct_state -inv action ct commit action goto chain 1
tc qdisc add dev veth1 clsact
tc filter add dev veth1 ingress chain 0 protocol ip flower ct_state +trk action drop

ping <remove ip via veth0> &
tc -s filter show dev veth1 ingress

With command 'tc -s filter show', we can find the pkts were dropped on
veth1.

Fixes: b57dc7c13ea9 ("net/sched: Introduce action ct")
Signed-off-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>