When a file is opened for writing, the vfs code (do_dentry_open)
calls get_write_access for the inode, thus incrementing the inode's write
count. That writer normally then creates a multi-block reservation for
the inode (i_res) that can be re-used by other writers, which speeds up
writes for applications that stupidly loop on open/write/close.
When the writes are all done, the multi-block reservation should be
deleted when the file is closed by the last "writer."

Commit 0ec9b9ea broke that concept when it moved the call to
gfs2_rs_delete before the check for FMODE_WRITE.  Non-writers have no
business removing the multi-block reservations of writers. In fact, if
someone opens and closes the file for RO while a writer has a
multi-block reservation, the RO closer will delete the reservation
midway through the write, and this results in:

kernel BUG at fs/gfs2/rgrp.c:677! (or thereabouts) which is:
BUG_ON(rs->rs_requested); from function gfs2_rs_deltree.

This patch moves the check back inside the check for FMODE_WRITE.

Fixes: 0ec9b9ea ("gfs2: Check for active reservation in gfs2_release")
Cc: stable@vger.kernel.org # v5.12+
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

It turns out that the might_sleep() call that commit 660a6126 adds
is triggering occasional data corruption in testing.  We're not sure
about the root cause yet, but since this commit was added as a debugging
aid only, revert it for now.

This reverts commit 660a6126.

Fixes: 660a6126 ("gfs2: check context in gfs2_glock_put")
Cc: stable@vger.kernel.org # v5.16+
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

Before this patch, glock dumps would not dump the gl_object for iopen
glocks. This information can help us debug problems related to eviction:
when AN iopen glock is blocked we can see the status of its underlying
inode and its flags, etc.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

The description of gfs2_instantiate accidentally lists a glock argument,
but the function takes a glock holder.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

If the GLF_INSTANTIATE_NEEDED flag isn't set, gfs2_instantiate() is a
no-op.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

Function rgrp_go_inval calls gfs2_rgrp_brelse to invalidate the
in-core rgrp structures. After the call it set GLF_INSTANTIATE_NEEDED,
which is redundant, since gfs2_rgrp_brelse also sets it.
This patch simply removes the redundant set_bit.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

The function name in the kernel-doc comment wasn't updated when the
function was renamed.

Fixes: b016d9a8 ("gfs2: Save ip from gfs2_glock_nq_init")
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

Pull gfs2 fixes from Andreas Gruenbacher:

 - Since commit 486408d6 ("gfs2: Cancel remote delete work
   asynchronously"), inode create and lookup-by-number can overlap more
   easily and we can end up with temporary duplicate inodes. Fix the
   code to prevent that.

 - Fix a BUG demoting weak glock holders from a remote node.

* tag 'gfs2-v5.16-rc4-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
  gfs2: gfs2_create_inode rework
  gfs2: gfs2_inode_lookup rework
  gfs2: gfs2_inode_lookup cleanup
  gfs2: Fix remote demote of weak glock holders

Pull VFIO fixes from Alex Williamson:

 - Fix OpRegion pointer arithmetic (Zhenyu Wang)

 - Fix comment format triggering kernel-doc warnings (Randy Dunlap)

* tag 'vfio-v5.16-rc4' of git://github.com/awilliam/linux-vfio:
  vfio/pci: Fix OpRegion read
  vfio: remove all kernel-doc notation

Pull power management fixes from Rafael Wysocki:
 "These fix a CPU hot-add issue in the cpufreq core, fix a comment in
  the cpufreq core code and update its documentation, and disable the
  DTPM (Dynamic Thermal Power Management) code for the time being to
  prevent it from causing issues to appear.

  Specifics:

   - Disable DTPM for this cycle to prevent it from causing issues to
     appear on otherwise functional systems (Daniel Lezcano)

   - Fix cpufreq sysfs interface failure related to physical CPU hot-add
     (Xiongfeng Wang)

   - Fix comment in cpufreq core and update its documentation (Tang
     Yizhou)"

* tag 'pm-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  powercap: DTPM: Drop unused local variable from init_dtpm()
  cpufreq: docs: Update core.rst
  cpufreq: Fix a comment in cpufreq_policy_free
  powercap/drivers/dtpm: Disable DTPM at boot time
  cpufreq: Fix get_cpu_device() failure in add_cpu_dev_symlink()

Pull s390 fixes from Heiko Carstens:

 - Fix potential overlap of pseudo-MMIO addresses with MIO addresses

 - Fix stack unwinder test case inline assembly compile error that
   happens with LLVM's integrated assembler

 - Update defconfigs

* tag 's390-5.16-4' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390: update defconfigs
  s390/pci: move pseudo-MMIO to prevent MIO overlap
  s390/test_unwind: use raw opcode instead of invalid instruction

Pull arm64 fixes from Will Deacon:
 "Three arm64 fixes for -rc4.

  One of them is just a trivial documentation fix, whereas the other two
  address a warning in the kexec code and a crash in ftrace on systems
  implementing BTI.

  The latter patch has a couple of ugly ifdefs which Mark plans to clean
  up separately, but as-is the patch is straightforward for backporting
  to stable kernels.

  Summary:

   - Add missing BTI landing instructions to the ftrace*_caller
     trampolines

   - Fix kexec() WARN when DEBUG_VIRTUAL is enabled

   - Fix PAC documentation by removing stale references to compiler
     flags"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: ftrace: add missing BTIs
  arm64: kexec: use __pa_symbol(empty_zero_page)
  arm64: update PAC description for kernel

Pull i2c fixes from Wolfram Sang:
 "I2C has another set of driver bugfixes, mostly for the stm32f7 driver"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: rk3x: Handle a spurious start completion interrupt flag
  i2c: stm32f7: use proper DMAENGINE API for termination
  i2c: stm32f7: stop dma transfer in case of NACK
  i2c: stm32f7: recover the bus on access timeout
  i2c: stm32f7: flush TX FIFO upon transfer errors
  i2c: cbus-gpio: set atomic transfer callback

Pull libata fixes from Damien Le Moal:
 "Two sparse warning fixes and a couple of patches to fix an issue with
  sata_fsl driver module removal:

   - A couple of patches to avoid sparse warnings in libata-sata and in
     the pata_falcon driver (from Yang and Finn).

   - A couple of sata_fsl driver patches fixing IRQ free and proc
     unregister on module removal (from Baokun)"

* tag 'libata-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata:
  ata: replace snprintf in show functions with sysfs_emit
  sata_fsl: fix warning in remove_proc_entry when rmmod sata_fsl
  sata_fsl: fix UAF in sata_fsl_port_stop when rmmod sata_fsl
  pata_falcon: Avoid type warnings from sparse

Jann Horn points out that there is another possible race wrt Unix domain
socket garbage collection, somewhat reminiscent of the one fixed in
commit cbcf0112 ("af_unix: fix garbage collect vs MSG_PEEK").

See the extended comment about the garbage collection requirements added
to unix_peek_fds() by that commit for details.

The race comes from how we can locklessly look up a file descriptor just
as it is in the process of being closed, and with the right artificial
timing (Jann added a few strategic 'mdelay(500)' calls to do that), the
Unix domain socket garbage collector could see the reference count
decrement of the close() happen before fget() took its reference to the
file and the file was attached onto a new file descriptor.

This is all (intentionally) correct on the 'struct file *' side, with
RCU lookups and lockless reference counting very much part of the
design.  Getting that reference count out of order isn't a problem per
se.

But the garbage collector can get confused by seeing this situation of
having seen a file not having any remaining external references and then
seeing it being attached to an fd.

In commit cbcf0112 ("af_unix: fix garbage collect vs MSG_PEEK") the
fix was to serialize the file descriptor install with the garbage
collector by taking and releasing the unix_gc_lock.

That's not really an option here, but since this all happens when we are
in the process of looking up a file descriptor, we can instead simply
just re-check that the file hasn't been closed in the meantime, and just
re-do the lookup if we raced with a concurrent close() of the same file
descriptor.
Reported-and-tested-by: Jann Horn <jannh@google.com>
Acked-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Merge DTPM fixes for 5.16-rc4.

* powercap:
  powercap: DTPM: Drop unused local variable from init_dtpm()
  powercap/drivers/dtpm: Disable DTPM at boot time

The dtpm_descr variable in init_dtpm() is not used after commit
f751db8a ("powercap/drivers/dtpm: Disable DTPM at boot time"),
so drop it.

Fixes: f751db8a ("powercap/drivers/dtpm: Disable DTPM at boot time")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Pull drm fixes from Dave Airlie:
 "Bit of an uptick in patch count this week, though it's all relatively
  small overall.

  I suspect msm has been queuing up a few fixes to skew it here.
  Otherwise amdgpu has a scattered bunch of small fixes, and then some
  vc4, i915.

  virtio-gpu changes an rc1 introduced uAPI mistake, and makes it
  operate more like other drivers. This should be fine as no userspace
  relies on the behaviour yet.

  Summary:

  dma-buf:
   - memory leak fix

  msm:
   - kasan found memory overwrite
   - mmap flags
   - fencing error bug
   - ioctl NULL ptr
   - uninit var
   - devfreqless devices fix
   - dsi lanes fix
   - dp: avoid unpowered aux xfers

  amdgpu:
   - IP discovery based enumeration fixes
   - vkms fixes
   - DSC fixes for DP MST
   - Audio fix for hotplug with tiled displays
   - Misc display fixes
   - DP tunneling fix
   - DP fix
   - Aldebaran fix

  amdkfd:
   - Locking fix
   - Static checker fix
   - Fix double free

  i915:
   - backlight regression
   - Intel HDR backlight detection fix
   - revert TGL workaround that caused hangs

  virtio-gpu:
   - switch back to drm_poll

  vc4:
   - memory leak
   - error check fix
   - HVS modesetting fixes"

* tag 'drm-fixes-2021-12-03-1' of git://anongit.freedesktop.org/drm/drm: (41 commits)
  Revert "drm/i915: Implement Wa_1508744258"
  drm/amdkfd: process_info lock not needed for svm
  drm/amdgpu: adjust the kfd reset sequence in reset sriov function
  drm/amd/display: add connector type check for CRC source set
  drm/amdkfd: fix double free mem structure
  drm/amdkfd: set "r = 0" explicitly before goto
  drm/amd/display: Add work around for tunneled MST.
  drm/amd/display: Fix for the no Audio bug with Tiled Displays
  drm/amd/display: Clear DPCD lane settings after repeater training
  drm/amd/display: Allow DSC on supported MST branch devices
  drm/amdgpu: Don't halt RLC on GFX suspend
  drm/amdgpu: fix the missed handling for SDMA2 and SDMA3
  drm/amdgpu: check atomic flag to differeniate with legacy path
  drm/amdgpu: cancel the correct hrtimer on exit
  drm/amdgpu/sriov/vcn: add new vcn ip revision check case for SIENNA_CICHLID
  drm/i915/dp: Perform 30ms delay after source OUI write
  dma-buf: system_heap: Use 'for_each_sgtable_sg' in pages free flow
  drm/i915: Add support for panels with VESA backlights with PWM enable/disable
  drm/vc4: kms: Fix previous HVS commit wait
  drm/vc4: kms: Don't duplicate pending commit
  ...

Merge tag 'drm-intel-fixes-2021-12-02' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

- Fixing a regression where the backlight brightness control stopped working.

- Fix the Intel HDR backlight support detection.

- Reverting a w/a to fix a gpu Hang in TGL. The w/a itself was also
for a hang, but in a much rarer scenario. The proper solution need
to be done with help from user space and it will be addressed later.
Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/Yakf9hdnR5or+zNP@intel.com

Switch back to drm_poll for virtio, multiple fixes (memory leak,
improper error check, some functional fixes too) for vc4, memory leak
fix in dma-buf,
Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20211202084440.u3b7lbeulj7k3ltg@houat

Pull networking fixes from Jakub Kicinski:
 "Including fixes from wireless, and wireguard.

  Mostly scattered driver changes this week, with one big clump in
  mv88e6xxx. Nothing of note, really.

  Current release - regressions:

   - smc: keep smc_close_final()'s error code during active close

  Current release - new code bugs:

   - iwlwifi: various static checker fixes (int overflow, leaks, missing
     error codes)

   - rtw89: fix size of firmware header before transfer, avoid crash

   - mt76: fix timestamp check in tx_status; fix pktid leak;

   - mscc: ocelot: fix missing unlock on error in ocelot_hwstamp_set()

  Previous releases - regressions:

   - smc: fix list corruption in smc_lgr_cleanup_early

   - ipv4: convert fib_num_tclassid_users to atomic_t

  Previous releases - always broken:

   - tls: fix authentication failure in CCM mode

   - vrf: reset IPCB/IP6CB when processing outbound pkts, prevent
     incorrect processing

   - dsa: mv88e6xxx: fixes for various device errata

   - rds: correct socket tunable error in rds_tcp_tune()

   - ipv6: fix memory leak in fib6_rule_suppress

   - wireguard: reset peer src endpoint when netns exits

   - wireguard: improve resilience to DoS around incoming handshakes

   - tcp: fix page frag corruption on page fault which involves TCP

   - mpls: fix missing attributes in delete notifications

   - mt7915: fix NULL pointer dereference with ad-hoc mode

  Misc:

   - rt2x00: be more lenient about EPROTO errors during start

   - mlx4_en: update reported link modes for 1/10G"

* tag 'net-5.16-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (85 commits)
  net: dsa: b53: Add SPI ID table
  gro: Fix inconsistent indenting
  selftests: net: Correct case name
  net/rds: correct socket tunable error in rds_tcp_tune()
  mctp: Don't let RTM_DELROUTE delete local routes
  net/smc: Keep smc_close_final rc during active close
  ibmvnic: drop bad optimization in reuse_tx_pools()
  ibmvnic: drop bad optimization in reuse_rx_pools()
  net/smc: fix wrong list_del in smc_lgr_cleanup_early
  Fix Comment of ETH_P_802_3_MIN
  ethernet: aquantia: Try MAC address from device tree
  ipv4: convert fib_num_tclassid_users to atomic_t
  net: avoid uninit-value from tcp_conn_request
  net: annotate data-races on txq->xmit_lock_owner
  octeontx2-af: Fix a memleak bug in rvu_mbox_init()
  net/mlx4_en: Fix an use-after-free bug in mlx4_en_try_alloc_resources()
  vrf: Reset IPCB/IP6CB when processing outbound pkts in vrf dev xmit
  net: qlogic: qlcnic: Fix a NULL pointer dereference in qlcnic_83xx_add_rings()
  net: dsa: mv88e6xxx: Link in pcs_get_state() if AN is bypassed
  net: dsa: mv88e6xxx: Fix inband AN for 2500base-x on 88E6393X family
  ...

Pull tracing fixes from Steven Rostedt:
 "Three tracing fixes:

   - Allow compares of strings when using signed and unsigned characters

   - Fix kmemleak false positive for histogram entries

   - Handle negative numbers for user defined kretprobe data sizes"

* tag 'trace-v5.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  kprobes: Limit max data_size of the kretprobe instances
  tracing: Fix a kmemleak false positive in tracing_map
  tracing/histograms: String compares should not care about signed values

Pull IPMI fixes from Corey Minyard:
 "Some changes that went in 5.16 had issues. When working on the design
  a piece was redesigned and things got missed. And the message type was
  not being initialized when it was allocated, resulting in crashes.

  In addition, the IPMI driver has had a shutdown issue where it could
  still have an item in a system workqueue after it had been shutdown.
  Move to a private workqueue to avoid that problem"

* tag 'for-linus-5.16-2' of git://github.com/cminyard/linux-ipmi:
  ipmi:ipmb: Fix unknown command response
  ipmi: fix IPMI_SMI_MSG_TYPE_IPMB_DIRECT response length checking
  ipmi: fix oob access due to uninit smi_msg type
  ipmi: msghandler: Make symbol 'remove_work_wq' static
  ipmi: Move remove_work to dedicated workqueue

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

This workarounds are causing hangs, because I missed the fact that it
needs to be enabled for all cases and disabled when doing a resolve
pass.

So KMD only needs to whitelist it and UMD will be the one setting it
on per case.

This reverts commit 28ec02c9.

Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/4145Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Fixes: 28ec02c9 ("drm/i915: Implement Wa_1508744258")
Reviewed-by: Matt Atwood <matthew.s.atwood@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211119140931.32791-1-jose.souza@intel.com
(cherry picked from commit f3799ff1)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

Currently autoloading for SPI devices does not use the DT ID table, it
uses SPI modalises. Supporting OF modalises is going to be difficult if
not impractical, an attempt was made but has been reverted, so ensure
that module autoloading works for this driver by adding an id_table
listing the SPI IDs for everything.

Fixes: 96c8395e ("spi: Revert modalias changes")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Eliminate the follow smatch warning:

net/ipv6/ip6_offload.c:249 ipv6_gro_receive() warn: inconsistent
indenting.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

ipv6_addr_bind/ipv4_addr_bind are function names. Previously, bind test
would not be run by default due to the wrong case names

Fixes: 34d0302a ("selftests: Add ipv6 address bind tests to fcnal-test")
Fixes: 75b2b2b3 ("selftests: Add ipv4 address bind tests to fcnal-test")
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Correct an error where setting /proc/sys/net/rds/tcp/rds_tcp_rcvbuf would
instead modify the socket's sk_sndbuf and would leave sk_rcvbuf untouched.

Fixes: c6a58ffe ("RDS: TCP: Add sysctl tunables for sndbuf/rcvbuf on rds-tcp socket")
Signed-off-by: William Kucharski <william.kucharski@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

We need to test against the existing route type, not
the rtm_type in the netlink request.

Fixes: 83f0a0b7 ("mctp: Specify route types, require rtm_type in RTM_*ROUTE messages")
Signed-off-by: Matt Johnston <matt@codeconstruct.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

When smc_close_final() returns error, the return code overwrites by
kernel_sock_shutdown() in smc_close_active(). The return code of
smc_close_final() is more important than kernel_sock_shutdown(), and it
will pass to userspace directly.

Fix it by keeping both return codes, if smc_close_final() raises an
error, return it or kernel_sock_shutdown()'s.

Link: https://lore.kernel.org/linux-s390/1f67548e-cbf6-0dce-82b5-10288a4583bd@linux.ibm.com/
Fixes: 606a63c9 ("net/smc: Ensure the active closing peer first closes clcsock")
Suggested-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Tony Lu <tonylu@linux.alibaba.com>
Reviewed-by: Wen Gu <guwen@linux.alibaba.com>
Acked-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

When trying to decide whether or not reuse existing rx/tx pools
we tried to allow a range of values for the pool parameters rather
than exact matches. This was intended to reuse the resources for
instance when switching between two VIO servers with different
default parameters.

But this optimization is incomplete and breaks when we try to
change the number of queues for instance. The optimization needs
to be updated, so drop it for now and simplify the code.

Fixes: bbd80930 ("ibmvnic: Reuse tx pools when possible")
Reported-by: Dany Madden <drt@linux.ibm.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.ibm.com>
Reviewed-by: Dany Madden <drt@linux.ibm.com>
Reviewed-by: Rick Lindsley <ricklind@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

When trying to decide whether or not reuse existing rx/tx pools
we tried to allow a range of values for the pool parameters rather
than exact matches. This was intended to reuse the resources for
instance when switching between two VIO servers with different
default parameters.

But this optimization is incomplete and breaks when we try to
change the number of queues for instance. The optimization needs
to be updated, so drop it for now and simplify the code.

Fixes: 489de956 ("ibmvnic: Reuse rx pools when possible")
Reported-by: Dany Madden <drt@linux.ibm.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.ibm.com>
Reviewed-by: Dany Madden <drt@linux.ibm.com>
Reviewed-by: Rick Lindsley <ricklind@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

smc_lgr_cleanup_early() meant to delete the link
group from the link group list, but it deleted
the list head by mistake.

This may cause memory corruption since we didn't
remove the real link group from the list and later
memseted the link group structure.
We got a list corruption panic when testing:

[  231.277259] list_del corruption. prev->next should be ffff8881398a8000, but was 0000000000000000
[  231.278222] ------------[ cut here ]------------
[  231.278726] kernel BUG at lib/list_debug.c:53!
[  231.279326] invalid opcode: 0000 [#1] SMP NOPTI
[  231.279803] CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.10.46+ #435
[  231.280466] Hardware name: Alibaba Cloud ECS, BIOS 8c24b4c 04/01/2014
[  231.281248] Workqueue: events smc_link_down_work
[  231.281732] RIP: 0010:__list_del_entry_valid+0x70/0x90
[  231.282258] Code: 4c 60 82 e8 7d cc 6a 00 0f 0b 48 89 fe 48 c7 c7 88 4c
60 82 e8 6c cc 6a 00 0f 0b 48 89 fe 48 c7 c7 c0 4c 60 82 e8 5b cc 6a 00 <0f>
0b 48 89 fe 48 c7 c7 00 4d 60 82 e8 4a cc 6a 00 0f 0b cc cc cc
[  231.284146] RSP: 0018:ffffc90000033d58 EFLAGS: 00010292
[  231.284685] RAX: 0000000000000054 RBX: ffff8881398a8000 RCX: 0000000000000000
[  231.285415] RDX: 0000000000000001 RSI: ffff88813bc18040 RDI: ffff88813bc18040
[  231.286141] RBP: ffffffff8305ad40 R08: 0000000000000003 R09: 0000000000000001
[  231.286873] R10: ffffffff82803da0 R11: ffffc90000033b90 R12: 0000000000000001
[  231.287606] R13: 0000000000000000 R14: ffff8881398a8000 R15: 0000000000000003
[  231.288337] FS:  0000000000000000(0000) GS:ffff88813bc00000(0000) knlGS:0000000000000000
[  231.289160] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  231.289754] CR2: 0000000000e72058 CR3: 000000010fa96006 CR4: 00000000003706f0
[  231.290485] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  231.291211] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[  231.291940] Call Trace:
[  231.292211]  smc_lgr_terminate_sched+0x53/0xa0
[  231.292677]  smc_switch_conns+0x75/0x6b0
[  231.293085]  ? update_load_avg+0x1a6/0x590
[  231.293517]  ? ttwu_do_wakeup+0x17/0x150
[  231.293907]  ? update_load_avg+0x1a6/0x590
[  231.294317]  ? newidle_balance+0xca/0x3d0
[  231.294716]  smcr_link_down+0x50/0x1a0
[  231.295090]  ? __wake_up_common_lock+0x77/0x90
[  231.295534]  smc_link_down_work+0x46/0x60
[  231.295933]  process_one_work+0x18b/0x350

Fixes: a0a62ee1 ("net/smc: separate locks for SMCD and SMCR link group lists")
Signed-off-by: Dust Li <dust.li@linux.alibaba.com>
Acked-by: Karsten Graul <kgraul@linux.ibm.com>
Reviewed-by: Tony Lu <tonylu@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The description of ETH_P_802_3_MIN is misleading.
The value of EthernetType in Ethernet II frame is more than 0x0600,
the value of Length in 802.3 frame is less than 0x0600.
Signed-off-by: Xiayu Zhang <Xiayu.Zhang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Apple M1 Mac minis (2020) with 10GE NICs do not have MAC address in the
card, but instead need to obtain MAC addresses from the device tree. In
this case the hardware will report an invalid MAC.

Currently atlantic driver does not query the DT for MAC address and will
randomly assign a MAC if the NIC doesn't have a permanent MAC burnt in.
This patch causes the driver to perfer a valid MAC address from OF (if
present) over HW self-reported MAC and only fall back to a random MAC
address when neither of them is valid.
Signed-off-by: Tianhao Chai <cth451@gmail.com>
Reviewed-by: Igor Russkikh <irusskikh@marvell.com>
Reviewed-by: Hector Martin <marcan@marcan.st>
Signed-off-by: David S. Miller <davem@davemloft.net>

Before commit faa041a4 ("ipv4: Create cleanup helper for fib_nh")
changes to net->ipv4.fib_num_tclassid_users were protected by RTNL.

After the change, this is no longer the case, as free_fib_info_rcu()
runs after rcu grace period, without rtnl being held.

Fixes: faa041a4 ("ipv4: Create cleanup helper for fib_nh")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: David Ahern <dsahern@kernel.org>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

When gfs2_lookup_by_inum() calls gfs2_inode_lookup() for an uncached
inode, gfs2_inode_lookup() will place a new tentative inode into the
inode cache before verifying that there is a valid inode at the given
address.  This can race with gfs2_create_inode() which doesn't check for
duplicates inodes.  gfs2_create_inode() will try to assign the new inode
to the corresponding inode glock, and glock_set_object() will complain
that the glock is still in use by gfs2_inode_lookup's tentative inode.

We noticed this bug after adding commit 486408d6 ("gfs2: Cancel
remote delete work asynchronously") which allowed delete_work_func() to
race with gfs2_create_inode(), but the same race exists for
open-by-handle.

Fix that by switching from insert_inode_hash() to
insert_inode_locked4(), which does check for duplicate inodes.  We know
we've just managed to to allocate the new inode, so an inode tentatively
created by gfs2_inode_lookup() will eventually go away and
insert_inode_locked4() will always succeed.

In addition, don't flush the inode glock work anymore (this can now only
make things worse) and clean up glock_{set,clear}_object for the inode
glock somewhat.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

Rework gfs2_inode_lookup() to only set up the new inode's glocks after
verifying that the new inode is valid.

There is no need for flushing the inode glock work queue anymore now,
so remove that as well.

While at it, get rid of the useless wrapper around iget5_locked() and
its unnecessary is_bad_inode() check.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

In gfs2_inode_lookup, once the inode has been looked up, we check if the
inode generation (no_formal_ino) is the one we're looking for.  If it
isn't and the inode wasn't in the inode cache, we discard the newly
looked up inode.  This is unnecessary, complicates the code, and makes
future changes to gfs2_inode_lookup harder, so change the code to retain
newly looked up inodes instead.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>