syzbot


INFO: task hung in vivid_stop_generating_vid_cap

Status: fixed on 2019/11/11 17:14
Reported-by: syzbot+06283a66a648cd073885@syzkaller.appspotmail.com
Fix commit: d65842f7126a media: vb2: add waiting_in_dqbuf flag
First crash: 1997d, last: 1993d
Cause bisection: introduced by (bisect log) :
commit f2fe89061d79706eca5c47e4efdc09bbc171e74a
Author: Helen Koike <helen.koike@collabora.com>
Date: Fri Apr 7 17:55:19 2017 +0000

  [media] vimc: Virtual Media Controller core, capture and sensor

Crash: INFO: task hung in vivid_stop_generating_vid_cap (log)
Repro: C syz .config
  
Fix bisection: fixed by (bisect log) :
commit d65842f7126aa1a87fb44b7c9980c12630ed4f33
Author: Hans Verkuil <hverkuil@xs4all.nl>
Date: Mon Nov 19 11:09:00 2018 +0000

  media: vb2: add waiting_in_dqbuf flag

  
Discussions (4)
Title Replies (including bot) Last reply
INFO: task hung in vivid_stop_generating_vid_cap 4 (9) 2019/11/11 14:00
[PATCH] videobuf2-core: avoid buffer operations while in stop_streaming 3 (3) 2019/08/16 09:35
Reminder: 35 open syzbot bugs in media subsystem 1 (1) 2019/07/24 01:39
Reminder: 28 open syzbot bugs in media subsystem 1 (1) 2019/06/27 03:53
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 INFO: task hung in vivid_stop_generating_vid_cap C error 315 1509d 1832d 0/1 upstream: reported C repro on 2019/04/11 12:40
linux-4.19 INFO: task hung in vivid_stop_generating_vid_cap C done 291 1599d 1833d 1/1 fixed on 2019/12/31 04:23
Last patch testing requests (4)
Created Duration User Patch Repo Result
2019/08/16 10:19 13m hverkuil@xs4all.nl patch git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git master report log
2019/08/15 18:53 18m hverkuil@xs4all.nl patch git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git master OK
2019/08/15 13:26 19m hverkuil@xs4all.nl patch git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git master OK
2019/08/15 12:37 0m hverkuil@xs4all.nl patch git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git master error OK

Sample crash report:
INFO: task syz-executor563:5695 blocked for more than 140 seconds.
      Not tainted 4.19.0+ #313
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor563 D22040  5695   5689 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472
 schedule+0xfe/0x460 kernel/sched/core.c:3516
 schedule_timeout+0x1cc/0x260 kernel/time/timer.c:1780
 do_wait_for_common kernel/sched/completion.c:83 [inline]
 __wait_for_common kernel/sched/completion.c:104 [inline]
 wait_for_common kernel/sched/completion.c:115 [inline]
 wait_for_completion+0x427/0x8a0 kernel/sched/completion.c:136
 kthread_stop+0x1a9/0x900 kernel/kthread.c:550
 vivid_stop_generating_vid_cap+0x2bc/0x93b drivers/media/platform/vivid/vivid-kthread-cap.c:919
 vid_cap_stop_streaming+0x8d/0xe0 drivers/media/platform/vivid/vivid-vid-cap.c:259
 __vb2_queue_cancel+0x171/0xca0 drivers/media/common/videobuf2/videobuf2-core.c:1668
 vb2_core_streamoff+0x60/0x140 drivers/media/common/videobuf2/videobuf2-core.c:1804
 __vb2_cleanup_fileio+0x73/0x160 drivers/media/common/videobuf2/videobuf2-core.c:2325
 vb2_core_queue_release+0x1e/0x80 drivers/media/common/videobuf2/videobuf2-core.c:2052
 vb2_queue_release drivers/media/common/videobuf2/videobuf2-v4l2.c:672 [inline]
 _vb2_fop_release+0x1d2/0x2b0 drivers/media/common/videobuf2/videobuf2-v4l2.c:843
 vb2_fop_release+0x77/0xc0 drivers/media/common/videobuf2/videobuf2-v4l2.c:857
 vivid_fop_release+0x18e/0x440 drivers/media/platform/vivid/vivid-core.c:474
 v4l2_release+0xfb/0x1a0 drivers/media/v4l2-core/v4l2-dev.c:448
 __fput+0x385/0xa30 fs/file_table.c:278
 ____fput+0x15/0x20 fs/file_table.c:309
 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x400ef0
Code: 00 00 47 02 00 00 ed 00 00 00 00 00 00 00 73 02 00 00 00 00 00 00 a8 01 00 00 00 00 00 00 36 01 00 00 b5 00 00 00 01 02 00 00 <00> 00 00 00 00 00 00 00 6a 01 00 00 00 00 00 00 00 00 00 00 00 00
RSP: 002b:00007ffe96b8ec58 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000400ef0
RDX: 0000000000000249 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 0000000000000000 R08: 000000000086e880 R09: 00000000004002e0
R10: 000000000000000f R11: 0000000000000246 R12: 0000000000401e00
R13: 0000000000401e90 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor563:5698 blocked for more than 140 seconds.
      Not tainted 4.19.0+ #313
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor563 D21784  5698   5685 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472
 schedule+0xfe/0x460 kernel/sched/core.c:3516
 schedule_timeout+0x1cc/0x260 kernel/time/timer.c:1780
 do_wait_for_common kernel/sched/completion.c:83 [inline]
 __wait_for_common kernel/sched/completion.c:104 [inline]
 wait_for_common kernel/sched/completion.c:115 [inline]
 wait_for_completion+0x427/0x8a0 kernel/sched/completion.c:136
 kthread_stop+0x1a9/0x900 kernel/kthread.c:550
 vivid_stop_generating_vid_cap+0x2bc/0x93b drivers/media/platform/vivid/vivid-kthread-cap.c:919
 vid_cap_stop_streaming+0x8d/0xe0 drivers/media/platform/vivid/vivid-vid-cap.c:259
 __vb2_queue_cancel+0x171/0xca0 drivers/media/common/videobuf2/videobuf2-core.c:1668
 vb2_core_streamoff+0x60/0x140 drivers/media/common/videobuf2/videobuf2-core.c:1804
 __vb2_cleanup_fileio+0x73/0x160 drivers/media/common/videobuf2/videobuf2-core.c:2325
 vb2_core_queue_release+0x1e/0x80 drivers/media/common/videobuf2/videobuf2-core.c:2052
 vb2_queue_release drivers/media/common/videobuf2/videobuf2-v4l2.c:672 [inline]
 _vb2_fop_release+0x1d2/0x2b0 drivers/media/common/videobuf2/videobuf2-v4l2.c:843
 vb2_fop_release+0x77/0xc0 drivers/media/common/videobuf2/videobuf2-v4l2.c:857
 vivid_fop_release+0x18e/0x440 drivers/media/platform/vivid/vivid-core.c:474
 v4l2_release+0xfb/0x1a0 drivers/media/v4l2-core/v4l2-dev.c:448
 __fput+0x385/0xa30 fs/file_table.c:278
 ____fput+0x15/0x20 fs/file_table.c:309
 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x400ef0
Code: 00 00 47 02 00 00 ed 00 00 00 00 00 00 00 73 02 00 00 00 00 00 00 a8 01 00 00 00 00 00 00 36 01 00 00 b5 00 00 00 01 02 00 00 <00> 00 00 00 00 00 00 00 6a 01 00 00 00 00 00 00 00 00 00 00 00 00
RSP: 002b:00007ffe96b8ec58 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000400ef0
RDX: 0000000000000249 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 0000000000000000 R08: 000000000086e880 R09: 00000000004002e0
R10: 000000000000000f R11: 0000000000000246 R12: 0000000000027e80
R13: 0000000000401e90 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor563:5701 blocked for more than 140 seconds.
      Not tainted 4.19.0+ #313
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor563 D21848  5701   5690 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472
 schedule+0xfe/0x460 kernel/sched/core.c:3516
 schedule_timeout+0x1cc/0x260 kernel/time/timer.c:1780
 do_wait_for_common kernel/sched/completion.c:83 [inline]
 __wait_for_common kernel/sched/completion.c:104 [inline]
 wait_for_common kernel/sched/completion.c:115 [inline]
 wait_for_completion+0x427/0x8a0 kernel/sched/completion.c:136
 kthread_stop+0x1a9/0x900 kernel/kthread.c:550
 vivid_stop_generating_vid_cap+0x2bc/0x93b drivers/media/platform/vivid/vivid-kthread-cap.c:919
 vid_cap_stop_streaming+0x8d/0xe0 drivers/media/platform/vivid/vivid-vid-cap.c:259
 __vb2_queue_cancel+0x171/0xca0 drivers/media/common/videobuf2/videobuf2-core.c:1668
 vb2_core_streamoff+0x60/0x140 drivers/media/common/videobuf2/videobuf2-core.c:1804
 __vb2_cleanup_fileio+0x73/0x160 drivers/media/common/videobuf2/videobuf2-core.c:2325
 vb2_core_queue_release+0x1e/0x80 drivers/media/common/videobuf2/videobuf2-core.c:2052
 vb2_queue_release drivers/media/common/videobuf2/videobuf2-v4l2.c:672 [inline]
 _vb2_fop_release+0x1d2/0x2b0 drivers/media/common/videobuf2/videobuf2-v4l2.c:843
 vb2_fop_release+0x77/0xc0 drivers/media/common/videobuf2/videobuf2-v4l2.c:857
 vivid_fop_release+0x18e/0x440 drivers/media/platform/vivid/vivid-core.c:474
 v4l2_release+0xfb/0x1a0 drivers/media/v4l2-core/v4l2-dev.c:448
 __fput+0x385/0xa30 fs/file_table.c:278
 ____fput+0x15/0x20 fs/file_table.c:309
 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x400ef0
Code: 00 00 47 02 00 00 ed 00 00 00 00 00 00 00 73 02 00 00 00 00 00 00 a8 01 00 00 00 00 00 00 36 01 00 00 b5 00 00 00 01 02 00 00 <00> 00 00 00 00 00 00 00 6a 01 00 00 00 00 00 00 00 00 00 00 00 00
RSP: 002b:00007ffe96b8ec58 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000400ef0
RDX: 0000000000000249 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 0000000000000000 R08: 000000000086e880 R09: 00000000004002e0
R10: 000000000000000f R11: 0000000000000246 R12: 0000000000027e7f
R13: 0000000000401e90 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor563:5705 blocked for more than 140 seconds.
      Not tainted 4.19.0+ #313
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor563 D22040  5705   5684 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472
 schedule+0xfe/0x460 kernel/sched/core.c:3516
 schedule_timeout+0x1cc/0x260 kernel/time/timer.c:1780
 do_wait_for_common kernel/sched/completion.c:83 [inline]
 __wait_for_common kernel/sched/completion.c:104 [inline]
 wait_for_common kernel/sched/completion.c:115 [inline]
 wait_for_completion+0x427/0x8a0 kernel/sched/completion.c:136
 kthread_stop+0x1a9/0x900 kernel/kthread.c:550
 vivid_stop_generating_vid_cap+0x2bc/0x93b drivers/media/platform/vivid/vivid-kthread-cap.c:919
 vid_cap_stop_streaming+0x8d/0xe0 drivers/media/platform/vivid/vivid-vid-cap.c:259
 __vb2_queue_cancel+0x171/0xca0 drivers/media/common/videobuf2/videobuf2-core.c:1668
 vb2_core_streamoff+0x60/0x140 drivers/media/common/videobuf2/videobuf2-core.c:1804
 __vb2_cleanup_fileio+0x73/0x160 drivers/media/common/videobuf2/videobuf2-core.c:2325
 vb2_core_queue_release+0x1e/0x80 drivers/media/common/videobuf2/videobuf2-core.c:2052
 vb2_queue_release drivers/media/common/videobuf2/videobuf2-v4l2.c:672 [inline]
 _vb2_fop_release+0x1d2/0x2b0 drivers/media/common/videobuf2/videobuf2-v4l2.c:843
 vb2_fop_release+0x77/0xc0 drivers/media/common/videobuf2/videobuf2-v4l2.c:857
 vivid_fop_release+0x18e/0x440 drivers/media/platform/vivid/vivid-core.c:474
 v4l2_release+0xfb/0x1a0 drivers/media/v4l2-core/v4l2-dev.c:448
 __fput+0x385/0xa30 fs/file_table.c:278
 ____fput+0x15/0x20 fs/file_table.c:309
 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x400ef0
Code: 00 00 47 02 00 00 ed 00 00 00 00 00 00 00 73 02 00 00 00 00 00 00 a8 01 00 00 00 00 00 00 36 01 00 00 b5 00 00 00 01 02 00 00 <00> 00 00 00 00 00 00 00 6a 01 00 00 00 00 00 00 00 00 00 00 00 00
RSP: 002b:00007ffe96b8ec58 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000400ef0
RDX: 0000000000000249 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 0000000000000000 R08: 000000000086e880 R09: 00000000004002e0
R10: 000000000000000f R11: 0000000000000246 R12: 0000000000027e8d
R13: 0000000000401e90 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor563:5710 blocked for more than 140 seconds.
      Not tainted 4.19.0+ #313
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor563 D21832  5710   5687 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472
 schedule+0xfe/0x460 kernel/sched/core.c:3516
 schedule_timeout+0x1cc/0x260 kernel/time/timer.c:1780
 do_wait_for_common kernel/sched/completion.c:83 [inline]
 __wait_for_common kernel/sched/completion.c:104 [inline]
 wait_for_common kernel/sched/completion.c:115 [inline]
 wait_for_completion+0x427/0x8a0 kernel/sched/completion.c:136
 kthread_stop+0x1a9/0x900 kernel/kthread.c:550
 vivid_stop_generating_vid_cap+0x2bc/0x93b drivers/media/platform/vivid/vivid-kthread-cap.c:919
 vid_cap_stop_streaming+0x8d/0xe0 drivers/media/platform/vivid/vivid-vid-cap.c:259
 __vb2_queue_cancel+0x171/0xca0 drivers/media/common/videobuf2/videobuf2-core.c:1668
 vb2_core_streamoff+0x60/0x140 drivers/media/common/videobuf2/videobuf2-core.c:1804
 __vb2_cleanup_fileio+0x73/0x160 drivers/media/common/videobuf2/videobuf2-core.c:2325
 vb2_core_queue_release+0x1e/0x80 drivers/media/common/videobuf2/videobuf2-core.c:2052
 vb2_queue_release drivers/media/common/videobuf2/videobuf2-v4l2.c:672 [inline]
 _vb2_fop_release+0x1d2/0x2b0 drivers/media/common/videobuf2/videobuf2-v4l2.c:843
 vb2_fop_release+0x77/0xc0 drivers/media/common/videobuf2/videobuf2-v4l2.c:857
 vivid_fop_release+0x18e/0x440 drivers/media/platform/vivid/vivid-core.c:474
 v4l2_release+0xfb/0x1a0 drivers/media/v4l2-core/v4l2-dev.c:448
 __fput+0x385/0xa30 fs/file_table.c:278
 ____fput+0x15/0x20 fs/file_table.c:309
 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166
 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:268 [inline]
 do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x400ef0
Code: 00 00 47 02 00 00 ed 00 00 00 00 00 00 00 73 02 00 00 00 00 00 00 a8 01 00 00 00 00 00 00 36 01 00 00 b5 00 00 00 01 02 00 00 <00> 00 00 00 00 00 00 00 6a 01 00 00 00 00 00 00 00 00 00 00 00 00
RSP: 002b:00007ffe96b8ec58 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000400ef0
RDX: 0000000000000249 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 0000000000000000 R08: 000000000086e880 R09: 00000000004002e0
R10: 000000000000000f R11: 0000000000000246 R12: 0000000000027e98
R13: 0000000000401e90 R14: 0000000000000000 R15: 0000000000000000

Showing all locks held in the system:
1 lock held by khungtaskd/1009:
 #0: 00000000ef6a8cd2 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4379
1 lock held by rsyslogd/5567:
2 locks held by getty/5657:
 #0: 0000000096766929 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 00000000554564ac (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
2 locks held by getty/5658:
 #0: 000000005b0ad137 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 000000000227ba62 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
2 locks held by getty/5659:
 #0: 00000000b9da7f48 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 0000000061442e66 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
2 locks held by getty/5660:
 #0: 000000007153e24b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 000000008472b68b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
2 locks held by getty/5661:
 #0: 0000000047469eee (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 00000000f0414caf (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
2 locks held by getty/5662:
 #0: 000000009ca12e4a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 00000000a1e5c331 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
2 locks held by getty/5663:
 #0: 00000000b93781a4 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 0000000032b35542 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 1009 Comm: khungtaskd Not tainted 4.19.0+ #313
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x244/0x39d lib/dump_stack.c:113
 nmi_cpu_backtrace.cold.2+0x5c/0xa1 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1e8/0x22a lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 trigger_all_cpu_backtrace include/linux/nmi.h:144 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline]
 watchdog+0xb51/0x1060 kernel/hung_task.c:289
 kthread+0x35a/0x440 kernel/kthread.c:246
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:350
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:57

Crashes (81):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/11/01 13:19 upstream 59fc453b21f7 1f38e9ae .config console log report syz C ci-upstream-kasan-gce
2018/11/01 10:14 upstream 59fc453b21f7 1f38e9ae .config console log report syz C ci-upstream-kasan-gce-root
2018/11/01 10:09 upstream 59fc453b21f7 1f38e9ae .config console log report syz C ci-upstream-kasan-gce-selinux-root
2018/11/01 09:07 upstream 59fc453b21f7 1f38e9ae .config console log report syz C ci-upstream-kasan-gce-selinux-root
2018/11/01 07:23 upstream 59fc453b21f7 1f38e9ae .config console log report syz C ci-upstream-kasan-gce-selinux-root
2018/11/01 06:17 upstream 59fc453b21f7 1f38e9ae .config console log report syz C ci-upstream-kasan-gce-root
2018/11/01 05:30 upstream 59fc453b21f7 1f38e9ae .config console log report syz C ci-upstream-kasan-gce-selinux-root
2018/11/01 03:17 upstream 59fc453b21f7 1f38e9ae .config console log report syz C ci-upstream-kasan-gce-root
2018/10/31 23:35 upstream 59fc453b21f7 89781090 .config console log report syz C ci-upstream-kasan-gce-smack-root
2018/10/31 23:14 upstream 59fc453b21f7 89781090 .config console log report syz C ci-upstream-kasan-gce
2018/10/31 22:50 upstream 59fc453b21f7 89781090 .config console log report syz C ci-upstream-kasan-gce-selinux-root
2018/10/31 21:54 upstream 59fc453b21f7 89781090 .config console log report syz C ci-upstream-kasan-gce-selinux-root
2018/10/31 21:48 upstream 59fc453b21f7 89781090 .config console log report syz C ci-upstream-kasan-gce-smack-root
2018/10/31 21:34 upstream 59fc453b21f7 89781090 .config console log report syz C ci-upstream-kasan-gce
2018/10/31 17:15 upstream 310c7585e830 89781090 .config console log report syz C ci-upstream-kasan-gce-smack-root
2018/10/31 11:57 upstream 310c7585e830 4ccf7bb4 .config console log report syz C ci-upstream-kasan-gce-selinux-root
2018/10/31 10:24 upstream 310c7585e830 4ccf7bb4 .config console log report syz C ci-upstream-kasan-gce-selinux-root
2018/10/31 09:25 upstream 310c7585e830 4ccf7bb4 .config console log report syz C ci-upstream-kasan-gce
2018/10/31 07:25 upstream 310c7585e830 4ccf7bb4 .config console log report syz C ci-upstream-kasan-gce
2018/10/31 05:53 upstream 310c7585e830 4ccf7bb4 .config console log report syz C ci-upstream-kasan-gce
2018/10/31 04:48 upstream 310c7585e830 4ccf7bb4 .config console log report syz C ci-upstream-kasan-gce
2018/10/31 04:02 upstream 310c7585e830 4ccf7bb4 .config console log report syz C ci-upstream-kasan-gce-smack-root
2018/10/30 05:50 upstream 4b42745211af 2f1090da .config console log report syz C ci-upstream-kasan-gce-smack-root
2018/10/30 04:34 upstream 4b42745211af 2f1090da .config console log report syz C ci-upstream-kasan-gce-smack-root
2018/10/29 21:06 upstream 9f51ae62c84a 7df9db2e .config console log report syz C ci-upstream-kasan-gce
2018/10/29 16:21 upstream 9f51ae62c84a 7df9db2e .config console log report syz C ci-upstream-kasan-gce-root
2018/11/01 14:06 upstream 59fc453b21f7 1f38e9ae .config console log report syz C ci-upstream-kasan-gce-386
2018/11/01 12:26 upstream 59fc453b21f7 1f38e9ae .config console log report syz C ci-upstream-kasan-gce-386
2018/11/01 06:32 upstream 59fc453b21f7 1f38e9ae .config console log report syz C ci-upstream-kasan-gce-386
2018/10/31 18:30 upstream 310c7585e830 89781090 .config console log report syz C ci-upstream-kasan-gce-386
2018/10/30 17:37 upstream 11743c56785c 8dbb755a .config console log report syz C ci-upstream-kasan-gce-386
2018/10/31 10:28 linux-next c39eb210d7a0 4ccf7bb4 .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2018/10/31 09:12 linux-next c39eb210d7a0 4ccf7bb4 .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2018/10/31 08:18 linux-next c39eb210d7a0 4ccf7bb4 .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2018/10/29 22:55 linux-next b179f0826c6a 7df9db2e .config console log report syz C ci-upstream-linux-next-kasan-gce-root
2018/10/31 18:16 upstream 59fc453b21f7 89781090 .config console log report ci-upstream-kasan-gce
2018/10/31 13:01 upstream 310c7585e830 89781090 .config console log report ci-upstream-kasan-gce-smack-root
2018/10/31 06:52 upstream 310c7585e830 4ccf7bb4 .config console log report ci-upstream-kasan-gce
2018/10/31 03:01 upstream 310c7585e830 4ccf7bb4 .config console log report ci-upstream-kasan-gce-smack-root
2018/10/31 01:22 upstream 310c7585e830 4ccf7bb4 .config console log report ci-upstream-kasan-gce-smack-root
2018/10/31 01:18 upstream 310c7585e830 4ccf7bb4 .config console log report ci-upstream-kasan-gce-smack-root
2018/10/30 19:07 upstream 11743c56785c 8dbb755a .config console log report ci-upstream-kasan-gce-root
2018/10/30 18:46 upstream 11743c56785c 8dbb755a .config console log report ci-upstream-kasan-gce-selinux-root
2018/10/30 18:14 upstream 11743c56785c 8dbb755a .config console log report ci-upstream-kasan-gce
2018/10/30 14:17 upstream 11743c56785c 8dbb755a .config console log report ci-upstream-kasan-gce-selinux-root
2018/10/30 13:46 upstream 11743c56785c 8dbb755a .config console log report ci-upstream-kasan-gce-smack-root
2018/10/30 12:57 upstream 11743c56785c 8dbb755a .config console log report ci-upstream-kasan-gce-root
2018/10/30 10:12 upstream 4b42745211af 2f1090da .config console log report ci-upstream-kasan-gce-smack-root
2018/10/30 01:41 upstream 4b42745211af 2f1090da .config console log report ci-upstream-kasan-gce-smack-root
2018/10/29 21:16 upstream 9f51ae62c84a 7df9db2e .config console log report ci-upstream-kasan-gce
2018/10/29 18:18 upstream 9f51ae62c84a 7df9db2e .config console log report ci-upstream-kasan-gce
2018/10/29 15:11 upstream 9f51ae62c84a 7df9db2e .config console log report ci-upstream-kasan-gce-selinux-root
2018/10/29 14:20 upstream 9f51ae62c84a 7df9db2e .config console log report ci-upstream-kasan-gce-smack-root
2018/10/29 14:16 upstream 9f51ae62c84a 7df9db2e .config console log report ci-upstream-kasan-gce-root
2018/10/29 14:08 upstream 9f51ae62c84a 7df9db2e .config console log report ci-upstream-kasan-gce
2018/10/29 14:08 upstream 9f51ae62c84a 7df9db2e .config console log report ci-upstream-kasan-gce-selinux-root
2018/10/31 02:42 upstream 310c7585e830 4ccf7bb4 .config console log report ci-upstream-kasan-gce-386
2018/10/30 19:05 upstream 11743c56785c 8dbb755a .config console log report ci-upstream-kasan-gce-386
2018/10/30 02:34 upstream 4b42745211af 2f1090da .config console log report ci-upstream-kasan-gce-386
2018/11/01 01:04 linux-next c39eb210d7a0 1f38e9ae .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/31 05:54 linux-next c39eb210d7a0 4ccf7bb4 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/31 03:01 linux-next 6201f31a39f8 4ccf7bb4 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/30 23:07 linux-next 6201f31a39f8 8dbb755a .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/30 18:20 linux-next 6201f31a39f8 8dbb755a .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/30 05:43 linux-next 6201f31a39f8 2f1090da .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/29 14:17 linux-next b179f0826c6a 7df9db2e .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/29 07:04 linux-next 8c60c36d0b8c 9ca2afa1 .config console log report ci-upstream-linux-next-kasan-gce-root
2018/10/29 02:54 linux-next 8c60c36d0b8c 9ca2afa1 .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.