kernel/workqueue.c:3030 __flush_work+0x2c2/0x2d0

From: Naresh Kamboju
Date: Sun Jun 16 2019 - 22:35:24 EST

Kernel warning while running kernel selftest bpf test_sockmap test case on
x86_64 and arm64.
The kernel warning log pops up continuously.

Linux version 5.1.10-rc2

Steps to reproduce:
Boot stable rc 5.1.10-rc2 kernel on x86_64 or arm64
cd selftests/bpf
./test_sockmap

[ 37.600406] WARNING: CPU: 3 PID: 57 at
/usr/src/kernel/kernel/workqueue.c:3030 __flush_work+0x2c2/0x2d0
[ 37.610034] Modules linked in: x86_pkg_temp_thermal fuse
[ 37.615371] CPU: 3 PID: 57 Comm: kworker/3:1 Not tainted 5.1.10-rc2 #1
[ 37.615454] WARNING: CPU: 0 PID: 5 at
/usr/src/kernel/kernel/workqueue.c:3030 __flush_work+0x2c2/0x2d0
[ 37.621892] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
2.0b 07/27/2017
[ 37.621895] Workqueue: events sk_psock_destroy_deferred
[ 37.631183] Modules linked in: x86_pkg_temp_thermal fuse
[ 37.638654] RIP: 0010:__flush_work+0x2c2/0x2d0
[ 37.638655] Code: c6 00 31 c0 e9 71 ff ff ff 41 8b 0c 24 49 8b 54
24 08 83 e1 08 49 0f ba 2c 24 03 80 c9 f0 e9 d2 fe ff ff 0f 0b e9 50
ff ff ff <0f> 0b 31 c0 e9 47 ff ff ff e8 90 9d fd ff 0f 1f 44 00 00 55
31 f6
[ 37.643879] CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.1.10-rc2 #1
[ 37.643880] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
2.0b 07/27/2017
[ 37.649183] RSP: 0018:ffffb038c1a23ca0 EFLAGS: 00010246
[ 37.653630] Workqueue: events sk_psock_destroy_deferred
[ 37.672375] RAX: 0000000000000000 RBX: ffff9e73d9492068 RCX: 0000000000000006
[ 37.672376] RDX: 0000000000000006 RSI: 0000000000000001 RDI: ffff9e73d9492068
[ 37.678805] RIP: 0010:__flush_work+0x2c2/0x2d0
[ 37.678807] Code: c6 00 31 c0 e9 71 ff ff ff 41 8b 0c 24 49 8b 54
24 08 83 e1 08 49 0f ba 2c 24 03 80 c9 f0 e9 d2 fe ff ff 0f 0b e9 50
ff ff ff <0f> 0b 31 c0 e9 47 ff ff ff e8 90 9d fd ff 0f 1f 44 00 00 55
31 f6
[ 37.686274] RBP: ffffb038c1a23d68 R08: 0000000000000000 R09: 0000000000000000
[ 37.686275] R10: 0000000000000000 R11: 0000000000000000 R12: ffff9e73d9492068
[ 37.691494] RSP: 0018:ffffb038c18fbca0 EFLAGS: 00010246
[ 37.696720] R13: 0000000000000001 R14: ffffb038c1a23d98 R15: ffffffff9a490d40
[ 37.696721] FS: 0000000000000000(0000) GS:ffff9e73dfb80000(0000)
knlGS:0000000000000000
[ 37.703851] RAX: 0000000000000000 RBX: ffff9e73d9490868 RCX: 0000000000000006
[ 37.703852] RDX: 0000000000000006 RSI: 0000000000000001 RDI: ffff9e73d9490868
[ 37.710976] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 37.710977] CR2: 00007f38680ca8a0 CR3: 00000002ee614006 CR4: 00000000003606e0
[ 37.715419] RBP: ffffb038c18fbd68 R08: 0000000000000000 R09: 0000000000000000
[ 37.715420] R10: 0000000000000000 R11: 0000000000000000 R12: ffff9e73d9490868
[ 37.734156] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 37.734157] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 37.741282] R13: 0000000000000001 R14: ffffb038c18fbd98 R15: ffffffff9a490d40
[ 37.741283] FS: 0000000000000000(0000) GS:ffff9e73dfa00000(0000)
knlGS:0000000000000000
[ 37.748405] Call Trace:
[ 37.748410] ? work_busy+0xc0/0xc0
[ 37.753621] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 37.753622] CR2: 00007f38680c9788 CR3: 000000045454a004 CR4: 00000000003606f0
[ 37.760746] ? mark_held_locks+0x4d/0x80
[ 37.768823] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 37.768824] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 37.775946] ? __cancel_work_timer+0x11a/0x1d0
[ 37.783071] Call Trace:
[ 37.783075] ? work_busy+0xc0/0xc0
[ 37.788808] ? cancel_delayed_work_sync+0x13/0x20
[ 37.788810] ? lockdep_hardirqs_on+0xf6/0x190
[ 37.795934] ? mark_held_locks+0x4d/0x80
[ 37.803055] ? __cancel_work_timer+0x11a/0x1d0
[ 37.803057] ? work_busy+0xc0/0xc0
[ 37.810179] ? __cancel_work_timer+0x11a/0x1d0
[ 37.817303] __cancel_work_timer+0x134/0x1d0
[ 37.824453] ? cancel_delayed_work_sync+0x13/0x20
[ 37.824455] ? lockdep_hardirqs_on+0xf6/0x190
[ 37.831579] cancel_delayed_work_sync+0x13/0x20
[ 37.839654] ? __cancel_work_timer+0x11a/0x1d0
[ 37.839657] ? work_busy+0xc0/0xc0
[ 37.842100] strp_done+0x1c/0x50
[ 37.845497] __cancel_work_timer+0x134/0x1d0
[ 37.851242] sk_psock_destroy_deferred+0x34/0x1c0
[ 37.858372] cancel_delayed_work_sync+0x13/0x20
[ 37.862292] process_one_work+0x281/0x610
[ 37.869415] strp_done+0x1c/0x50
[ 37.876540] worker_thread+0x3c/0x3f0
[ 37.880975] sk_psock_destroy_deferred+0x34/0x1c0
[ 37.883419] ? __kthread_parkme+0x61/0x90
[ 37.886819] process_one_work+0x281/0x610
[ 37.891514] kthread+0x12c/0x150
[ 37.895868] worker_thread+0x3c/0x3f0
[ 37.899783] ? process_one_work+0x610/0x610
[ 37.904221] kthread+0x12c/0x150
[ 37.907615] ? kthread_park+0x90/0x90
[ 37.907618] ret_from_fork+0x3a/0x50
[ 37.912052] ? process_one_work+0x610/0x610
[ 37.916355] irq event stamp: 57860
[ 37.921058] ? kthread_park+0x90/0x90
[ 37.921060] ret_from_fork+0x3a/0x50
[ 37.925407] hardirqs last enabled at (57859): [<ffffffff9a4949ba>]
__cancel_work_timer+0x11a/0x1d0
[ 37.925409] hardirqs last disabled at (57860): [<ffffffff9a401bab>]
trace_hardirqs_off_thunk+0x1a/0x1c
[ 37.929944] irq event stamp: 47474
[ 37.934378] softirqs last enabled at (57812): [<ffffffff9add14d5>]
release_sock+0x85/0xb0
[ 37.934379] softirqs last disabled at (57810): [<ffffffff9add140a>]
__release_sock+0xda/0x120
[ 37.937773] hardirqs last enabled at (47473): [<ffffffff9a4949ba>]
__cancel_work_timer+0x11a/0x1d0
[ 37.937775] hardirqs last disabled at (47474): [<ffffffff9a401bab>]
trace_hardirqs_off_thunk+0x1a/0x1c
[ 37.940998] ---[ end trace ae349dc9a55c8bc8 ]---
[ 37.941056] WARNING: CPU: 3 PID: 57 at
/usr/src/kernel/kernel/workqueue.c:3030 __flush_work+0x2c2/0x2d0
[ 37.945263] softirqs last enabled at (47440): [<ffffffff9add14d5>]
release_sock+0x85/0xb0
[ 37.945264] softirqs last disabled at (47438): [<ffffffff9add140a>]
__release_sock+0xda/0x120
[ 37.949968] Modules linked in: x86_pkg_temp_thermal fuse
[ 37.954493] ---[ end trace ae349dc9a55c8bc9 ]---
[ 37.954522] WARNING: CPU: 0 PID: 5 at
/usr/src/kernel/kernel/workqueue.c:3030 __flush_work+0x2c2/0x2d0
[...]

metadata:
git branch: linux-5.1.y
git repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git
git commit: b7eabc3862b8717f2bcc47f3f3830ec575423c8c
git describe: v5.1.9-157-gb7eabc3862b8
make_kernelversion: 5.1.10-rc2
kernel-config:
http://snapshots.linaro.org/openembedded/lkft/lkft/sumo/intel-corei7-64/lkft/linux-stable-rc-5.1/33/config
kernel-defconfig:
http://snapshots.linaro.org/openembedded/lkft/lkft/sumo/intel-corei7-64/lkft/linux-stable-rc-5.1/33/defconfig
build-url: https://ci.linaro.org/job/openembedded-lkft-linux-stable-rc-5.1/DISTRO=lkft,MACHINE=intel-corei7-64,label=docker-lkft/33/
build-location:
http://snapshots.linaro.org/openembedded/lkft/lkft/sumo/intel-corei7-64/lkft/linux-stable-rc-5.1/33
toolchain: x86_64-linaro-linux 7.%
series: lkft
email-notification: ''
kselftest__url: https://www.kernel.org/pub/linux/kernel/v5.x/linux-5.1.tar.xz
kselftest__version: '5.1'
kselftest__revision: '5.1'

Full test log,
https://lkft.validation.linaro.org/scheduler/job/775857#L1114

Best regards
Naresh Kamboju