On Thu, May 5, 2022 at 11:44 PM kernel test robot [off-list ref] wrote:

Greeting,

FYI, we noticed the following commit (built with gcc-11):

commit: 72fd55c0dbb1ad5ba283ca80abc9546702815a33 ("[PATCH v2 net-next] net: generalize skb freeing deferral to per-cpu lists")
url: https://github.com/intel-lab-lkp/linux/commits/Eric-Dumazet/net-generalize-skb-freeing-deferral-to-per-cpu-lists/20220423-060710
base: https://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git c78c5a660439d4d341a03b651541fda3ebe76160
patch link: https://lore.kernel.org/netdev/20220422201237.416238-1-eric.dumazet@gmail.com (local)

I think this commit had two follow up fixes.
Make sure to test the tree after the fixes are included, otherwise
this is adding unneeded noise.
Thank you.

commit f3412b3879b4f7c4313b186b03940d4791345534
Author: Eric Dumazet [off-list ref]
Date:   Wed Apr 27 13:41:47 2022 -0700

    net: make sure net_rx_action() calls skb_defer_free_flush()

And:

commit 783d108dd71d97e4cac5fe8ce70ca43ed7dc7bb7
Author: Eric Dumazet [off-list ref]
Date:   Fri Apr 29 18:15:23 2022 -0700

    tcp: drop skb dst in tcp_rcv_established()

in testcase: xfstests
version: xfstests-x86_64-46e1b83-1_20220414
with following parameters:

        disk: 4HDD
        fs: ext4
        fs2: smbv3
        test: generic-group-10
        ucode: 0xec

test-description: xfstests is a regression test suite for xfs and other files ystems.
test-url: git://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git


on test machine: 8 threads Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz with 16G memory

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):



If you fix the issue, kindly add following tag
Reported-by: kernel test robot <redacted>



[   80.428226][ T1836] Attempt to set a LOCK_MAND lock via flock(2). This support has been removed and the request ignored.
[   80.739189][  T370] generic/207       0s
[   80.739198][  T370]
[   80.785302][ T1696] run fstests generic/208 at 2022-05-06 02:42:26
[   81.143444][ T1836] Attempt to set a LOCK_MAND lock via flock(2). This support has been removed and the request ignored.
[   89.609627][   T58] kworker/u16:5 invoked oom-killer: gfp_mask=0xcd0(GFP_KERNEL|__GFP_RECLAIMABLE), order=0, oom_score_adj=0
[   89.620805][   T58] CPU: 0 PID: 58 Comm: kworker/u16:5 Not tainted 5.18.0-rc3-00568-g72fd55c0dbb1 #1
[   89.629899][   T58] Hardware name: HP HP Z240 SFF Workstation/802E, BIOS N51 Ver. 01.63 10/05/2017
[   89.638822][   T58] Workqueue: writeback wb_workfn (flush-8:16)
[   89.644727][   T58] Call Trace:
[   89.647863][   T58]  <TASK>
[ 89.650649][ T58] dump_stack_lvl (kbuild/src/consumer/lib/dump_stack.c:107 (discriminator 1))
[ 89.654992][ T58] dump_header (kbuild/src/consumer/mm/oom_kill.c:73 kbuild/src/consumer/mm/oom_kill.c:461)
[ 89.659250][ T58] oom_kill_process.cold (kbuild/src/consumer/mm/oom_kill.c:979)
[ 89.664110][ T58] out_of_memory (kbuild/src/consumer/mm/oom_kill.c:1119 (discriminator 4))


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        sudo bin/lkp install job.yaml           # job file is attached in this email
        bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run
        sudo bin/lkp run generated-yaml-file

        # if come across any failure that blocks the test,
        # please remove ~/.lkp and /lkp dir to run from a clean state.



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