This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1781601
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Tags added: bionic
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1781601
Title:
Stress-testing LXD causes kernel hung in cgroups (cgroup_destroy
css_killed_work_fn)
Status in linux package in Ubuntu:
Incomplete
Bug description:
I have been stress-testing LXD and managed to cause the following
kernel hung:
[10271.564074] INFO: task systemd:1 blocked for more than 120 seconds.
[10271.570397] Tainted: P OE 4.15.0-20-generic #21-Ubuntu
[10271.577212] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[10271.585071] systemd D 0 1 0 0x00000000
[10271.585073] Call Trace:
[10271.585080] __schedule+0x297/0x8b0
[10271.585086] schedule+0x2c/0x80
[10271.585090] schedule_preempt_disabled+0xe/0x10
[10271.585095] __mutex_lock.isra.2+0x18c/0x4d0
[10271.585100] __mutex_lock_slowpath+0x13/0x20
[10271.585101] ? __mutex_lock_slowpath+0x13/0x20
[10271.585102] mutex_lock+0x2f/0x40
[10271.585106] proc_cgroup_show+0x4c/0x2a0
[10271.585108] proc_single_show+0x56/0x80
[10271.585111] seq_read+0xe5/0x430
[10271.585114] __vfs_read+0x1b/0x40
[10271.585115] vfs_read+0x8e/0x130
[10271.585117] SyS_read+0x55/0xc0
[10271.585120] do_syscall_64+0x73/0x130
[10271.585121] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[10271.585123] RIP: 0033:0x7fd47634d0b4
[10271.585124] RSP: 002b:00007ffe9a186700 EFLAGS: 00000246 ORIG_RAX:
0000000000000000
[10271.585125] RAX: ffffffffffffffda RBX: 0000000000000021 RCX:
00007fd47634d0b4
[10271.585126] RDX: 0000000000000400 RSI: 000055f70a08c0c0 RDI:
0000000000000021
[10271.585127] RBP: 000055f70a08c0c0 R08: 0000000000000000 R09:
0000000000000000
[10271.585128] R10: 0000000000000000 R11: 0000000000000246 R12:
0000000000000400
[10271.585129] R13: 00007fd4766252a0 R14: 000055f70a0298e0 R15:
00000000000007ff
[10271.585221] INFO: task lxcfs:84510 blocked for more than 120 seconds.
[10271.591687] Tainted: P OE 4.15.0-20-generic #21-Ubuntu
[10271.598531] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[10271.606401] lxcfs D 0 84510 1 0x00000000
[10271.606407] Call Trace:
[10271.606416] __schedule+0x297/0x8b0
[10271.606418] schedule+0x2c/0x80
[10271.606420] schedule_preempt_disabled+0xe/0x10
[10271.606421] __mutex_lock.isra.2+0x18c/0x4d0
[10271.606423] __mutex_lock_slowpath+0x13/0x20
[10271.606424] ? __mutex_lock_slowpath+0x13/0x20
[10271.606425] mutex_lock+0x2f/0x40
[10271.606427] proc_cgroup_show+0x4c/0x2a0
[10271.606429] proc_single_show+0x56/0x80
[10271.606432] seq_read+0xe5/0x430
[10271.606434] __vfs_read+0x1b/0x40
[10271.606436] vfs_read+0x8e/0x130
[10271.606437] SyS_read+0x55/0xc0
[10271.606440] do_syscall_64+0x73/0x130
[10271.606441] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[10271.606443] RIP: 0033:0x7f1a50e700b4
[10271.606443] RSP: 002b:00007f1a2b7fd870 EFLAGS: 00000246 ORIG_RAX:
0000000000000000
[10271.606445] RAX: ffffffffffffffda RBX: 0000000000000013 RCX:
00007f1a50e700b4
[10271.606446] RDX: 0000000000000400 RSI: 00007f1a04000f90 RDI:
0000000000000013
[10271.606446] RBP: 00007f1a04000f90 R08: 0000000000000001 R09:
0000000000000000
[10271.606447] R10: 0000000000000000 R11: 0000000000000246 R12:
0000000000000400
[10271.606448] R13: 00007f1a511482a0 R14: 0000000000000000 R15:
00007f1a38003a40
[10271.606450] INFO: task lxcfs:84676 blocked for more than 120 seconds.
[10271.612911] Tainted: P OE 4.15.0-20-generic #21-Ubuntu
[10271.619722] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[10271.627577] lxcfs D 0 84676 1 0x00000000
[10271.627579] Call Trace:
[10271.627583] __schedule+0x297/0x8b0
[10271.627589] schedule+0x2c/0x80
[10271.627594] schedule_preempt_disabled+0xe/0x10
[10271.627598] __mutex_lock.isra.2+0x18c/0x4d0
[10271.627600] __mutex_lock_slowpath+0x13/0x20
[10271.627601] ? __mutex_lock_slowpath+0x13/0x20
[10271.627602] mutex_lock+0x2f/0x40
[10271.627604] proc_cgroup_show+0x4c/0x2a0
[10271.627606] proc_single_show+0x56/0x80
[10271.627608] seq_read+0xe5/0x430
[10271.627610] __vfs_read+0x1b/0x40
[10271.627611] vfs_read+0x8e/0x130
[10271.627613] SyS_read+0x55/0xc0
[10271.627615] do_syscall_64+0x73/0x130
[10271.627617] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[10271.627618] RIP: 0033:0x7f1a50e700b4
[10271.627618] RSP: 002b:00007f1a297f9870 EFLAGS: 00000246 ORIG_RAX:
0000000000000000
[10271.627620] RAX: ffffffffffffffda RBX: 0000000000000014 RCX:
00007f1a50e700b4
[10271.627620] RDX: 0000000000000400 RSI: 00007f1a2c001e80 RDI:
0000000000000014
[10271.627621] RBP: 00007f1a2c001e80 R08: 0000000000000001 R09:
0000000000000000
[10271.627622] R10: 0000000000000000 R11: 0000000000000246 R12:
0000000000000400
[10271.627622] R13: 00007f1a511482a0 R14: 0000000000000000 R15:
00007f1a2c002b10
[10271.627625] INFO: task lxcfs:115507 blocked for more than 120 seconds.
[10271.634180] Tainted: P OE 4.15.0-20-generic #21-Ubuntu
[10271.641007] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[10271.648870] lxcfs D 0 115507 1 0x00000000
[10271.648872] Call Trace:
[10271.648876] __schedule+0x297/0x8b0
[10271.648883] schedule+0x2c/0x80
[10271.648887] schedule_preempt_disabled+0xe/0x10
[10271.648891] __mutex_lock.isra.2+0x18c/0x4d0
[10271.648895] __mutex_lock_slowpath+0x13/0x20
[10271.648896] ? __mutex_lock_slowpath+0x13/0x20
[10271.648897] mutex_lock+0x2f/0x40
[10271.648899] proc_cgroup_show+0x4c/0x2a0
[10271.648902] proc_single_show+0x56/0x80
[10271.648904] seq_read+0xe5/0x430
[10271.648906] __vfs_read+0x1b/0x40
[10271.648907] vfs_read+0x8e/0x130
[10271.648909] SyS_read+0x55/0xc0
[10271.648911] do_syscall_64+0x73/0x130
[10271.648913] entry_SYSCALL_64_after_hwframe+0x3d/0xa2
[10271.648914] RIP: 0033:0x7f1a50e700b4
[10271.648915] RSP: 002b:00007f1a29ffa870 EFLAGS: 00000246 ORIG_RAX:
0000000000000000
[10271.648916] RAX: ffffffffffffffda RBX: 0000000000000015 RCX:
00007f1a50e700b4
[10271.648917] RDX: 0000000000000400 RSI: 00007f19f0001820 RDI:
0000000000000015
[10271.648918] RBP: 00007f19f0001820 R08: 0000000000000001 R09:
0000000000000000
[10271.648925] R10: 0000000000000000 R11: 0000000000000246 R12:
0000000000000400
[10271.648928] R13: 00007f1a511482a0 R14: 0000000000000000 R15:
00007f19f00024d0
[10271.648964] INFO: task kworker/14:1:111280 blocked for more than 120
seconds.
[10271.656131] Tainted: P OE 4.15.0-20-generic #21-Ubuntu
[10271.662944] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[10271.670822] kworker/14:1 D 0 111280 2 0x80000000
[10271.670827] Workqueue: cgroup_destroy css_killed_work_fn
[10271.670828] Call Trace:
[10271.670832] __schedule+0x297/0x8b0
[10271.670834] schedule+0x2c/0x80
[10271.670836] schedule_preempt_disabled+0xe/0x10
[10271.670837] __mutex_lock.isra.2+0x18c/0x4d0
[10271.670841] ? wake_up_q+0x44/0x80
[10271.670842] __mutex_lock_slowpath+0x13/0x20
[10271.670843] ? __mutex_lock_slowpath+0x13/0x20
[10271.670844] mutex_lock+0x2f/0x40
[10271.670845] css_killed_work_fn+0x1f/0xe0
[10271.670848] process_one_work+0x1de/0x410
[10271.670849] worker_thread+0x32/0x410
[10271.670851] kthread+0x121/0x140
[10271.670852] ? process_one_work+0x410/0x410
[10271.670854] ? kthread_create_worker_on_cpu+0x70/0x70
[10271.670856] ? kthread_create_worker_on_cpu+0x70/0x70
[10271.670857] ret_from_fork+0x22/0x40
[10271.670859] INFO: task kworker/29:0:111571 blocked for more than 120
seconds.
[10271.678018] Tainted: P OE 4.15.0-20-generic #21-Ubuntu
[10271.684827] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[10271.692681] kworker/29:0 D 0 111571 2 0x80000000
[10271.692686] Workqueue: cgroup_destroy css_release_work_fn
[10271.692691] Call Trace:
[10271.692694] __schedule+0x297/0x8b0
[10271.692697] ? ttwu_do_wakeup+0x1e/0x150
[10271.692699] schedule+0x2c/0x80
[10271.692700] schedule_preempt_disabled+0xe/0x10
[10271.692702] __mutex_lock.isra.2+0x18c/0x4d0
[10271.692709] ? wake_up_q+0x44/0x80
[10271.692714] __mutex_lock_slowpath+0x13/0x20
[10271.692719] ? __mutex_lock_slowpath+0x13/0x20
[10271.692723] mutex_lock+0x2f/0x40
[10271.692728] css_release_work_fn+0x2b/0x180
[10271.692733] process_one_work+0x1de/0x410
[10271.692735] worker_thread+0x32/0x410
[10271.692737] kthread+0x121/0x140
[10271.692738] ? process_one_work+0x410/0x410
[10271.692740] ? kthread_create_worker_on_cpu+0x70/0x70
[10271.692742] ? do_syscall_64+0x115/0x130
[10271.692743] ret_from_fork+0x22/0x40
[10271.692752] INFO: task kworker/2:1:128568 blocked for more than 120
seconds.
[10271.699827] Tainted: P OE 4.15.0-20-generic #21-Ubuntu
[10271.706653] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[10271.714524] kworker/2:1 D 0 128568 2 0x80000000
[10271.714529] Workqueue: cgroup_destroy css_release_work_fn
[10271.714530] Call Trace:
[10271.714534] __schedule+0x297/0x8b0
[10271.714536] schedule+0x2c/0x80
[10271.714537] schedule_preempt_disabled+0xe/0x10
[10271.714539] __mutex_lock.isra.2+0x18c/0x4d0
[10271.714540] __mutex_lock_slowpath+0x13/0x20
[10271.714541] ? __mutex_lock_slowpath+0x13/0x20
[10271.714543] mutex_lock+0x2f/0x40
[10271.714544] css_release_work_fn+0x2b/0x180
[10271.714545] process_one_work+0x1de/0x410
[10271.714547] worker_thread+0x32/0x410
[10271.714548] kthread+0x121/0x140
[10271.714550] ? process_one_work+0x410/0x410
[10271.714551] ? kthread_create_worker_on_cpu+0x70/0x70
[10271.714552] ? kthread_create_worker_on_cpu+0x70/0x70
[10271.714554] ret_from_fork+0x22/0x40
[10271.714564] INFO: task kworker/43:4:46368 blocked for more than 120
seconds.
[10271.721637] Tainted: P OE 4.15.0-20-generic #21-Ubuntu
[10271.728456] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[10271.736309] kworker/43:4 D 0 46368 2 0x80000000
[10271.736314] Workqueue: cgroup_destroy css_killed_work_fn
[10271.736321] Call Trace:
[10271.736328] __schedule+0x297/0x8b0
[10271.736330] schedule+0x2c/0x80
[10271.736332] schedule_preempt_disabled+0xe/0x10
[10271.736333] __mutex_lock.isra.2+0x18c/0x4d0
[10271.736336] ? wake_up_q+0x44/0x80
[10271.736337] __mutex_lock_slowpath+0x13/0x20
[10271.736338] ? __mutex_lock_slowpath+0x13/0x20
[10271.736339] mutex_lock+0x2f/0x40
[10271.736341] css_killed_work_fn+0x1f/0xe0
[10271.736342] process_one_work+0x1de/0x410
[10271.736344] worker_thread+0x32/0x410
[10271.736346] kthread+0x121/0x140
[10271.736352] ? process_one_work+0x410/0x410
[10271.736357] ? kthread_create_worker_on_cpu+0x70/0x70
[10271.736362] ret_from_fork+0x22/0x40
[10271.736367] INFO: task kworker/13:3:49251 blocked for more than 120
seconds.
[10271.743439] Tainted: P OE 4.15.0-20-generic #21-Ubuntu
[10271.750250] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[10271.758106] kworker/13:3 D 0 49251 2 0x80000000
[10271.758110] Workqueue: cgroup_destroy css_killed_work_fn
[10271.758111] Call Trace:
[10271.758119] __schedule+0x297/0x8b0
[10271.758122] schedule+0x2c/0x80
[10271.758123] schedule_preempt_disabled+0xe/0x10
[10271.758124] __mutex_lock.isra.2+0x18c/0x4d0
[10271.758127] ? wake_up_q+0x44/0x80
[10271.758128] __mutex_lock_slowpath+0x13/0x20
[10271.758129] ? __mutex_lock_slowpath+0x13/0x20
[10271.758130] mutex_lock+0x2f/0x40
[10271.758131] css_killed_work_fn+0x1f/0xe0
[10271.758133] process_one_work+0x1de/0x410
[10271.758134] worker_thread+0x32/0x410
[10271.758136] kthread+0x121/0x140
[10271.758143] ? process_one_work+0x410/0x410
[10271.758148] ? kthread_create_worker_on_cpu+0x70/0x70
[10271.758153] ret_from_fork+0x22/0x40
[10271.758161] INFO: task kworker/38:1:21823 blocked for more than 120
seconds.
[10271.765236] Tainted: P OE 4.15.0-20-generic #21-Ubuntu
[10271.772047] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables
this message.
[10271.779902] kworker/38:1 D 0 21823 2 0x80000000
[10271.779907] Workqueue: cgroup_destroy css_release_work_fn
[10271.779911] Call Trace:
[10271.779918] __schedule+0x297/0x8b0
[10271.779920] schedule+0x2c/0x80
[10271.779922] schedule_preempt_disabled+0xe/0x10
[10271.779923] __mutex_lock.isra.2+0x18c/0x4d0
[10271.779925] ? wake_up_q+0x44/0x80
[10271.779926] __mutex_lock_slowpath+0x13/0x20
[10271.779928] ? __mutex_lock_slowpath+0x13/0x20
[10271.779929] mutex_lock+0x2f/0x40
[10271.779930] css_release_work_fn+0x2b/0x180
[10271.779935] process_one_work+0x1de/0x410
[10271.779941] worker_thread+0x32/0x410
[10271.779946] kthread+0x121/0x140
[10271.779952] ? process_one_work+0x410/0x410
[10271.779955] ? kthread_create_worker_on_cpu+0x70/0x70
[10271.779959] ret_from_fork+0x22/0x40
root@myserver:~#
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1781601/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
