syzbot


possible deadlock in mnt_want_write
Status: fixed on 2020/11/16 12:12
Reported-by: syzbot+ae82084b07d0297e566b@syzkaller.appspotmail.com
Fix commit: 146d62e5a586 ovl: detect overlapping layers
First crash: 1162d, last: 354d

Cause bisection: introduced by (bisect log) :
commit 8e54cadab447dae779f80f79c87cbeaea9594f60
Author: Al Viro <viro@zeniv.linux.org.uk>
Date: Sun Nov 27 01:05:42 2016 +0000

  fix default_file_splice_read()

Crash: INFO: possible circular locking dependency detected ] (log)
Repro: C syz .config

Fix bisection: fixed by (bisect log) :
commit 146d62e5a5867fbf84490d82455718bfb10fe824
Author: Amir Goldstein <amir73il@gmail.com>
Date: Thu Apr 18 14:42:08 2019 +0000

  ovl: detect overlapping layers

similar bugs (4):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 possible deadlock in mnt_want_write C 248 1h04m 892d 0/1 upstream: reported C repro on 2019/04/19 16:54
android-49 possible deadlock in mnt_want_write 1 1144d 1144d 0/3 auto-closed as invalid on 2019/02/22 14:57
upstream possible deadlock in mnt_want_write (2) 13 1d12h 104d 0/22 upstream: reported on 2021/06/15 16:59
linux-4.14 possible deadlock in mnt_want_write C 4514 4d06h 886d 0/1 upstream: reported C repro on 2019/04/25 05:09

Sample crash report:

Crashes (662):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-smack-root 2019/04/19 05:55 upstream 6d906f998179 b0e8efcb .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2018/11/21 16:23 linux-next 442b8cea2477 5d9a3924 .config log report syz C
ci-upstream-kasan-gce-selinux-root 2020/03/06 17:23 upstream 63623fd44972 c88c7b75 .config log report syz
ci-upstream-kasan-gce-selinux-root 2019/04/26 17:09 upstream 8113a85f8720 b617407b .config log report syz
ci-upstream-kasan-gce-smack-root 2019/04/26 17:08 upstream 8113a85f8720 b617407b .config log report syz
ci-upstream-kasan-gce-root 2019/04/21 07:55 upstream 9e5de623a0cb b0e8efcb .config log report syz
ci-upstream-kasan-gce-selinux-root 2019/04/21 06:02 upstream 9e5de623a0cb b0e8efcb .config log report syz
ci-upstream-kasan-gce-root 2019/04/21 03:38 upstream 9e5de623a0cb b0e8efcb .config log report syz
ci-upstream-kasan-gce-smack-root 2019/04/21 03:14 upstream 9e5de623a0cb b0e8efcb .config log report syz
ci-upstream-kasan-gce-selinux-root 2019/04/21 01:09 upstream 9e5de623a0cb b0e8efcb .config log report syz
ci-upstream-kasan-gce-selinux-root 2018/11/22 05:19 upstream 92b419289cee 9db828b5 .config log report syz
ci-upstream-kasan-gce-root 2018/11/22 00:34 upstream 92b419289cee 9db828b5 .config log report syz
ci-upstream-kasan-gce-root 2018/11/21 23:56 upstream 92b419289cee 9db828b5 .config log report syz
ci-upstream-kasan-gce-smack-root 2018/11/21 16:13 upstream c8ce94b8fe53 5d9a3924 .config log report syz
ci-upstream-linux-next-kasan-gce-root 2020/02/29 19:19 linux-next bdc5461b23ca 59b57593 .config log report syz
ci-upstream-linux-next-kasan-gce-root 2019/04/26 17:10 linux-next 3ddfa8af5dc9 b617407b .config log report syz
ci-upstream-linux-next-kasan-gce-root 2019/04/22 09:55 linux-next 3f018f4a019a 0a77c33c .config log report syz
ci-upstream-linux-next-kasan-gce-root 2019/04/21 06:25 linux-next 3f018f4a019a b0e8efcb .config log report syz
ci-upstream-linux-next-kasan-gce-root 2018/11/21 20:44 linux-next 442b8cea2477 9db828b5 .config log report syz
ci-upstream-kasan-gce-root 2020/10/08 07:44 upstream c85fb28b6f99 1880b4a9 .config log report info
ci-upstream-kasan-gce-root 2020/10/07 10:56 upstream c85fb28b6f99 1880b4a9 .config log report info
ci-upstream-kasan-gce-smack-root 2020/10/07 04:52 upstream c85fb28b6f99 1880b4a9 .config log report info
ci-upstream-kasan-gce-root 2020/10/06 14:11 upstream 7575fdda569b 1880b4a9 .config log report info
ci-upstream-kasan-gce-root 2020/10/06 12:18 upstream 7575fdda569b 1880b4a9 .config log report info
ci-upstream-kasan-gce-selinux-root 2020/10/05 21:18 upstream 549738f15da0 1880b4a9 .config log report info
ci-upstream-kasan-gce-selinux-root 2020/10/05 08:35 upstream 549738f15da0 5ef9c291 .config log report info
ci-upstream-kasan-gce-smack-root 2020/10/05 05:49 upstream 549738f15da0 5ef9c291 .config log report info
ci-upstream-kasan-gce-selinux-root 2020/10/02 01:13 upstream fcadab740480 9602ddf4 .config log report info
ci-upstream-kasan-gce-smack-root 2020/10/01 12:53 upstream 60e720931556 a9767fb2 .config log report info
ci-upstream-kasan-gce-smack-root 2020/09/30 04:05 upstream ccc1d052eff9 5abc3f1a .config log report info
ci-upstream-kasan-gce-smack-root 2020/09/30 02:13 upstream ccc1d052eff9 5abc3f1a .config log report info
ci-upstream-kasan-gce-smack-root 2020/09/29 03:20 upstream fb0155a09b02 1b88c6d5 .config log report info
ci-upstream-kasan-gce-selinux-root 2020/09/28 22:42 upstream a1b8638ba132 6bfdbe89 .config log report info
ci-upstream-kasan-gce-root 2020/09/28 12:03 upstream a1b8638ba132 6bfdbe89 .config log report info
ci-upstream-kasan-gce-selinux-root 2020/09/28 06:37 upstream 16bc1d5432eb 5dd8aee8 .config log report info
ci-upstream-kasan-gce-smack-root 2020/09/27 19:21 upstream eeddbe6841cd 5dd8aee8 .config log report info
ci-upstream-kasan-gce-selinux-root 2020/09/27 17:36 upstream a1bffa48745a 5dd8aee8 .config log report info
ci-upstream-kasan-gce-selinux-root 2020/09/27 03:41 upstream eeddbe6841cd 2d5ea0cb .config log report info
ci-upstream-kasan-gce-root 2020/09/12 07:18 upstream e8878ab82545 79fb24e2 .config log report
ci-upstream-kasan-gce-root 2020/09/11 03:22 upstream 7fe10096c150 409809d8 .config log report
ci-upstream-kasan-gce-root 2020/09/11 01:28 upstream 7fe10096c150 409809d8 .config log report
ci-upstream-kasan-gce-smack-root 2020/09/10 15:16 upstream 34d4ddd359db 409809d8 .config log report
ci-upstream-kasan-gce-selinux-root 2020/09/10 13:45 upstream 34d4ddd359db 409809d8 .config log report
ci-upstream-kasan-gce-smack-root 2020/09/10 02:29 upstream 34d4ddd359db 409809d8 .config log report
ci-upstream-kasan-gce-selinux-root 2020/09/08 22:41 upstream 612ab8ad6414 abf9ba4f .config log report
ci-upstream-kasan-gce-root 2020/09/07 15:20 upstream f4d51dffc6c0 abf9ba4f .config log report
ci-upstream-kasan-gce-smack-root 2020/09/06 08:37 upstream 9322c47b21b9 abf9ba4f .config log report
ci-upstream-kasan-gce-selinux-root 2020/09/06 01:51 upstream 9322c47b21b9 abf9ba4f .config log report
ci-upstream-kasan-gce-smack-root 2020/09/05 23:26 upstream 9322c47b21b9 abf9ba4f .config log report
ci-upstream-kasan-gce-smack-root 2020/09/05 22:02 upstream 9322c47b21b9 abf9ba4f .config log report
ci-upstream-kasan-gce-root 2020/09/05 10:22 upstream c70672d8d316 abf9ba4f .config log report
ci-qemu-upstream 2020/01/14 21:34 upstream 452424cdcbca fa12bd3c .config log report
ci-upstream-kasan-gce 2018/08/10 00:19 upstream 112cbae26d18 1fb62d58 .config log report
ci-upstream-kasan-gce 2018/07/22 23:46 upstream 45ae4df92207 8cc079c3 .config log report
ci-upstream-kasan-gce-386 2018/08/10 00:18 upstream 112cbae26d18 1fb62d58 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/10/04 01:28 linux-next 2172e358cd17 1a3f9408 .config log report info
ci-upstream-linux-next-kasan-gce-root 2020/10/03 19:43 linux-next 2172e358cd17 2653fa43 .config log report info
ci-upstream-linux-next-kasan-gce-root 2020/10/01 19:10 linux-next d39294091fee a9767fb2 .config log report info
ci-upstream-linux-next-kasan-gce-root 2020/10/01 16:05 linux-next d39294091fee a9767fb2 .config log report info
ci-upstream-linux-next-kasan-gce-root 2020/09/30 11:01 linux-next 49e7e3e905e4 5abc3f1a .config log report info
ci-upstream-linux-next-kasan-gce-root 2020/09/25 04:56 linux-next d1d2220c7f39 54289b08 .config log report info
ci-upstream-linux-next-kasan-gce-root 2020/09/11 05:01 linux-next 7ce53e3a447b 409809d8 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/09/08 08:40 linux-next 7a6956579ce6 abf9ba4f .config log report
ci-upstream-linux-next-kasan-gce-root 2020/09/07 21:22 linux-next 7a6956579ce6 abf9ba4f .config log report
ci-upstream-linux-next-kasan-gce-root 2020/09/06 13:27 linux-next 7a6956579ce6 abf9ba4f .config log report
ci-upstream-linux-next-kasan-gce-root 2020/09/06 09:59 linux-next 7a6956579ce6 abf9ba4f .config log report
ci-upstream-linux-next-kasan-gce-root 2020/09/06 00:29 linux-next 7a6956579ce6 abf9ba4f .config log report
ci-upstream-linux-next-kasan-gce-root 2020/09/05 06:57 linux-next 7a6956579ce6 abf9ba4f .config log report