syzbot


INFO: rcu detected stall in chrdev_open (2)
Status: upstream: reported C repro on 2019/12/12 22:35
Reported-by: syzbot+29784f46793e49c37812@syzkaller.appspotmail.com
First crash: 674d, last: 3h42m

Cause bisection: introduced by (bisect log) [merge commit]:
commit 801fc022147974f4754939202efe607294479bc9
Author: Thierry Reding <treding@nvidia.com>
Date: Fri Nov 18 13:34:46 2016 +0000

  Merge branch 'for-4.10/firmware' into for-4.10/reset

Crash: unregister_netdevice: waiting for DEV to become free (log)
Repro: C syz .config

Fix bisection: the fix commit could be any of (bisect log):
  ae4b064e2a61 Merge tag 'afs-fixes-20191211' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs
  9e9fb7655ed5 Merge tag 'net-next-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
similar bugs (4):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: rcu detected stall in chrdev_open (2) 1 519d 519d 0/1 auto-closed as invalid on 2020/09/12 23:19
linux-4.19 INFO: rcu detected stall in chrdev_open (3) C 7 7d16h 208d 0/1 upstream: reported C repro on 2021/03/22 19:09
linux-4.19 INFO: rcu detected stall in chrdev_open 1 653d 653d 0/1 auto-closed as invalid on 2020/05/02 02:53
upstream INFO: rcu detected stall in chrdev_open 4 683d 684d 0/22 closed as invalid on 2019/12/04 14:04

Sample crash report:

Crashes (34):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2021/10/17 02:03 upstream 304040fb4909 0c5d9412 .config log report syz C INFO: rcu detected stall in chrdev_open
ci-upstream-kasan-gce-root 2021/10/12 10:28 upstream fa5878760579 838e7e2c .config log report syz C INFO: rcu detected stall in chrdev_open
ci-upstream-kasan-gce-selinux-root 2021/10/04 13:40 upstream 9e1ff307c779 ce697b49 .config log report syz C INFO: rcu detected stall in chrdev_open
ci-upstream-kasan-gce-selinux-root 2019/12/13 01:10 upstream ae4b064e2a61 08003f64 .config log report syz C
ci-upstream-kasan-gce-root 2019/12/12 15:53 upstream 687dec9b9459 d973f528 .config log report syz C
ci-upstream-kasan-gce-root 2021/10/16 21:03 upstream 304040fb4909 0c5d9412 .config log report info INFO: rcu detected stall in chrdev_open
ci-upstream-kasan-gce-root 2021/10/15 23:48 upstream ec681c53f8d2 0c5d9412 .config log report info INFO: rcu detected stall in chrdev_open
ci-upstream-kasan-gce-root 2021/10/14 19:24 upstream 26d657410983 7aa5fe41 .config log report info INFO: rcu detected stall in chrdev_open
ci-upstream-kasan-gce-root 2021/10/14 15:52 upstream 26d657410983 5462d470 .config log report info INFO: rcu detected stall in chrdev_open
ci-upstream-kasan-gce-selinux-root 2021/10/14 15:18 upstream 26d657410983 5462d470 .config log report info INFO: rcu detected stall in chrdev_open
ci-upstream-kasan-gce-smack-root 2021/10/13 20:47 upstream 348949d9a444 5462d470 .config log report info INFO: rcu detected stall in chrdev_open
ci-upstream-kasan-gce-root 2021/10/09 16:40 upstream 717478d89fe2 838e7e2c .config log report info INFO: rcu detected stall in chrdev_open
ci-upstream-kasan-gce-root 2021/10/09 11:14 upstream 5d6ab0bb408f 838e7e2c .config log report info INFO: rcu detected stall in chrdev_open
ci-upstream-kasan-gce-selinux-root 2021/10/07 02:51 upstream 5af4055fa813 62ee0987 .config log report info INFO: rcu detected stall in chrdev_open
ci-upstream-kasan-gce-selinux-root 2021/10/07 02:39 upstream 5af4055fa813 62ee0987 .config log report info INFO: rcu detected stall in chrdev_open
ci-upstream-kasan-gce-root 2021/10/06 13:43 upstream 60a9483534ed 0a63fd36 .config log report info INFO: rcu detected stall in chrdev_open
ci-upstream-kasan-gce-selinux-root 2021/10/04 17:36 upstream 84b3e42564ac ce697b49 .config log report info INFO: rcu detected stall in chrdev_open
ci-upstream-kasan-gce-root 2021/04/29 19:00 upstream d2b6f8a17919 77e2b668 .config log report info INFO: rcu detected stall in chrdev_open
ci-upstream-linux-next-kasan-gce-root 2021/10/15 12:17 linux-next 7c832d2f9b95 0c5d9412 .config log report info INFO: rcu detected stall in chrdev_open
ci-upstream-linux-next-kasan-gce-root 2021/10/13 22:49 linux-next 8006b911c90a 5462d470 .config log report info INFO: rcu detected stall in chrdev_open
ci-upstream-linux-next-kasan-gce-root 2021/10/07 10:53 linux-next f8dc23b3dc0c 62ee0987 .config log report info INFO: rcu detected stall in chrdev_open
ci-upstream-linux-next-kasan-gce-root 2021/10/06 19:30 linux-next 0dda5ee37364 62ee0987 .config log report info INFO: rcu detected stall in chrdev_open
ci-upstream-linux-next-kasan-gce-root 2021/10/04 07:54 linux-next a25006a77348 ce697b49 .config log report info INFO: rcu detected stall in chrdev_open
ci-upstream-kasan-gce-root 2020/03/15 19:27 upstream d3dca69085e9 749688d2 .config log report
ci-upstream-kasan-gce-selinux-root 2020/03/12 06:05 upstream e3a36eb6dfae e7caca8e .config log report
ci-upstream-kasan-gce-smack-root 2020/02/11 17:01 upstream 0a679e13ea30 4d1ab643 .config log report
ci-upstream-kasan-gce-root 2020/02/05 09:44 upstream 6992ca0dd017 93e5e335 .config log report
ci-upstream-kasan-gce-selinux-root 2020/01/31 08:35 upstream 9f68e3655aae 5ed23f9a .config log report
ci-upstream-kasan-gce-root 2020/01/09 10:24 upstream b07f636fca1c ddc3e859 .config log report
ci-upstream-kasan-gce-smack-root 2020/01/08 12:35 upstream ae6088216ce4 6738e0b3 .config log report
ci-upstream-kasan-gce-root 2019/12/12 13:57 upstream 687dec9b9459 d973f528 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/05/19 11:25 linux-next ac935d227366 6d882fd2 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/05/13 12:24 linux-next ac935d227366 9a6d42fb .config log report
ci-upstream-linux-next-kasan-gce-root 2020/02/06 05:39 linux-next a0c61bf1c773 662cf49a .config log report