syzbot


INFO: rcu detected stall in snd_seq_write (2)
Status: upstream: reported syz repro on 2021/10/31 17:20
Reported-by: syzbot+bb950e68b400ab4f65f8@syzkaller.appspotmail.com
First crash: 70d, last: 18d

Cause bisection: introduced by (bisect log) :
commit 1a7243ca4074beed97b68d7235a6e34862fc2cd6
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Tue Nov 10 11:38:47 2020 +0000

  kthread: Move prio/affinite change into the newly created thread

Crash: INFO: rcu detected stall in snd_seq_write (log)
Repro: syz .config
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in snd_seq_write syz error 18 861d 1191d 13/22 fixed on 2019/08/14 02:14
linux-4.19 INFO: rcu detected stall in snd_seq_write 1 719d 719d 0/1 auto-closed as invalid on 2020/04/10 16:27

Sample crash report:

Crashes (21):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-linux-next-kasan-gce-root 2021/10/31 03:11 linux-next bdcc9f6a5682 098b5d53 .config log report syz INFO: rcu detected stall in snd_seq_write
ci-upstream-kasan-gce 2021/11/08 23:06 upstream e851dfae4371 d29682f1 .config log report info INFO: rcu detected stall in snd_seq_write
ci-upstream-kasan-gce-smack-root 2021/11/08 19:27 upstream e851dfae4371 d29682f1 .config log report info INFO: rcu detected stall in snd_seq_write
ci-upstream-kasan-gce-smack-root 2021/11/08 13:18 upstream 6b75d88fa81b d29682f1 .config log report info INFO: rcu detected stall in snd_seq_write
ci-upstream-kasan-gce-386 2021/11/13 01:40 upstream 5833291ab6de 83f5c9b5 .config log report info INFO: rcu detected stall in snd_seq_write
ci-upstream-linux-next-kasan-gce-root 2021/11/05 12:16 linux-next b477ae38e815 4c1be0be .config log report info INFO: rcu detected stall in snd_seq_write
ci-upstream-linux-next-kasan-gce-root 2021/11/03 17:56 linux-next 8ccbda2840b7 4c1be0be .config log report info INFO: rcu detected stall in snd_seq_write
ci-upstream-linux-next-kasan-gce-root 2021/11/03 16:20 linux-next 8ccbda2840b7 4c1be0be .config log report info INFO: rcu detected stall in snd_seq_write
ci-upstream-linux-next-kasan-gce-root 2021/11/01 11:17 linux-next bdcc9f6a5682 098b5d53 .config log report info INFO: rcu detected stall in snd_seq_write
ci-upstream-linux-next-kasan-gce-root 2021/10/30 23:52 linux-next bdcc9f6a5682 098b5d53 .config log report info INFO: rcu detected stall in snd_seq_write
ci-upstream-linux-next-kasan-gce-root 2021/10/27 13:45 linux-next ae5179317e79 373bf66b .config log report info INFO: rcu detected stall in snd_seq_write
ci-upstream-linux-next-kasan-gce-root 2021/10/25 05:52 linux-next cf6c9d12750c 4f0000ee .config log report info INFO: rcu detected stall in snd_seq_write
ci-upstream-linux-next-kasan-gce-root 2021/10/21 11:05 linux-next 3196a52aff93 f111d03b .config log report info INFO: rcu detected stall in snd_seq_write
ci-upstream-linux-next-kasan-gce-root 2021/10/18 23:56 linux-next 60e8840126bd 24dc29db .config log report info INFO: rcu detected stall in snd_seq_write
ci-upstream-linux-next-kasan-gce-root 2021/10/14 22:06 linux-next 8006b911c90a 7aa5fe41 .config log report info INFO: rcu detected stall in snd_seq_write
ci-upstream-linux-next-kasan-gce-root 2021/09/28 06:00 linux-next bf5b1e621a51 78494d16 .config log report info INFO: rcu detected stall in snd_seq_write
ci-upstream-linux-next-kasan-gce-root 2021/09/26 22:36 linux-next 5a5d008887b4 78494d16 .config log report info INFO: rcu detected stall in snd_seq_write
ci-upstream-linux-next-kasan-gce-root 2021/09/26 22:20 linux-next 5a5d008887b4 78494d16 .config log report info INFO: rcu detected stall in snd_seq_write
ci-upstream-linux-next-kasan-gce-root 2021/09/26 15:40 linux-next 5a5d008887b4 8cac236e .config log report info INFO: rcu detected stall in snd_seq_write
ci-upstream-linux-next-kasan-gce-root 2021/09/26 09:20 linux-next 5a5d008887b4 8cac236e .config log report info INFO: rcu detected stall in snd_seq_write
ci-upstream-linux-next-kasan-gce-root 2021/09/22 08:19 linux-next e90f9946ba28 169724fe .config log report info INFO: rcu detected stall in snd_seq_write