syzbot


INFO: task can't die in netdev_run_todo

Status: upstream: reported syz repro on 2020/08/20 05:36
Reported-by: syzbot+22a310041c3467f85d12@syzkaller.appspotmail.com
First crash: 684d, last: 287d

Cause bisection: failed (bisect log)
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in netdev_run_todo (3) 10 60d 187d 0/1 upstream: reported on 2021/12/26 06:16
upstream INFO: task hung in netdev_run_todo (2) C error 236 5d21h 565d 0/22 upstream: reported C repro on 2020/12/13 16:23

Sample crash report:
INFO: task syz-executor.1:8005 can't die for more than 143 seconds.
syz-executor.1  D25048  8005      1 0x00004004
Call Trace:
 context_switch kernel/sched/core.c:3778 [inline]
 __schedule+0x8e5/0x21e0 kernel/sched/core.c:4527
 schedule+0xd0/0x2a0 kernel/sched/core.c:4602
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4661
 __mutex_lock_common kernel/locking/mutex.c:1033 [inline]
 __mutex_lock+0x3e2/0x10e0 kernel/locking/mutex.c:1103
 netdev_run_todo+0x705/0xac0 net/core/dev.c:10104
 sit_exit_batch_net+0x4ad/0x6c0 net/ipv6/sit.c:1945

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-linux-next-kasan-gce-root 2020/08/16 05:28 linux-next 4993e4fe12af 424dd8e7 .config log report syz
ci-upstream-linux-next-kasan-gce-root 2021/09/17 06:25 linux-next 368847b165bb 5b989942 .config log report info INFO: task can't die in netdev_run_todo