syzbot


INFO: task hung in lock_sock_nested (2)
Status: fixed on 2020/04/15 17:19
Reported-by: syzbot+731710996d79d0d58fbc@syzkaller.appspotmail.com
Fix commit: 3f74957fcbea vsock: fix potential deadlock in transport->release()
First crash: 659d, last: 642d

Cause bisection: introduced by (bisect log) :
commit 408624af4c89989117bb2c6517bd50b7708a2fcd
Author: Stefano Garzarella <sgarzare@redhat.com>
Date: Tue Dec 10 10:43:06 2019 +0000

  vsock: use local transport when it is loaded

Crash: INFO: task hung in lock_sock_nested (log)
Repro: C syz .config
similar bugs (12):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in lock_sock_nested C 2593 659d 1459d 0/22 closed as dup on 2017/12/23 20:15
android-44 INFO: task hung in lock_sock_nested (2) 4 741d 837d 0/2 auto-closed as invalid on 2020/03/27 01:37
upstream INFO: task hung in lock_sock_nested (3) C done 5 430d 432d 17/22 fixed on 2020/11/16 12:12
android-49 INFO: task hung in lock_sock_nested (2) 2 820d 939d 0/3 auto-closed as invalid on 2020/01/08 15:18
linux-4.14 INFO: task hung in lock_sock_nested 1 762d 762d 0/1 auto-closed as invalid on 2020/03/06 15:38
linux-4.14 INFO: task hung in lock_sock_nested (2) 1 499d 499d 0/1 auto-closed as invalid on 2020/11/24 03:07
android-44 INFO: task hung in lock_sock_nested C 82 1379d 1381d 0/2 closed as invalid on 2019/03/08 00:11
upstream INFO: task can't die in __lock_sock C done 870 8d19h 115d 0/22 upstream: reported C repro on 2021/08/15 16:47
upstream INFO: task hung in lock_sock_nested (4) C done 6 325d 371d 21/22 fixed on 2021/03/10 01:48
android-49 INFO: task hung in lock_sock_nested C 101 1019d 1381d 0/3 closed as invalid on 2019/03/08 00:11
android-414 INFO: task hung in lock_sock_nested 65 785d 970d 0/1 auto-closed as invalid on 2020/02/12 04:11
linux-4.19 INFO: task hung in lock_sock_nested 1 578d 578d 0/1 auto-closed as invalid on 2020/09/05 19:53
Patch testing requests:
Created Duration User Patch Repo Result
2020/02/26 10:39 18m sgarzare@redhat.com https://github.com/stefano-garzarella/linux.git vsock-fix-deadlock OK
2020/02/25 11:16 19m sgarzare@redhat.com https://github.com/stefano-garzarella/linux.git vsock-fix-deadlock OK

Sample crash report:

Crashes (418):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2020/02/25 02:45 upstream f8788d86ab28 59b57593 .config log report syz C
ci-upstream-kasan-gce-root 2020/02/23 22:20 upstream 0a115e5f23b9 2c36e7a7 .config log report syz C
ci-upstream-kasan-gce 2020/02/20 17:20 upstream ca7e1fd1026c 81230308 .config log report syz C
ci-upstream-net-this-kasan-gce 2020/02/20 17:14 net 41f57cfde186 81230308 .config log report syz C
ci-upstream-net-kasan-gce 2020/02/20 15:49 net-next 2bb07f4e1d86 81230308 .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2020/03/06 13:15 linux-next c99b17ac0399 c88c7b75 .config log report syz C
ci-upstream-kasan-gce-root 2020/03/06 12:40 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-kasan-gce-root 2020/03/06 03:53 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-kasan-gce-smack-root 2020/03/06 01:17 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-kasan-gce-selinux-root 2020/03/05 16:46 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-kasan-gce 2020/03/05 09:41 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-kasan-gce-smack-root 2020/03/05 05:15 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-kasan-gce-selinux-root 2020/03/05 05:12 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-kasan-gce-selinux-root 2020/03/04 20:59 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-kasan-gce-smack-root 2020/03/04 19:46 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-kasan-gce-selinux-root 2020/03/04 12:36 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-kasan-gce-smack-root 2020/03/04 10:08 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-kasan-gce-smack-root 2020/03/04 06:26 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-kasan-gce 2020/03/04 04:30 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-kasan-gce-selinux-root 2020/03/04 02:00 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-kasan-gce-root 2020/03/03 12:41 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-kasan-gce-root 2020/03/03 01:44 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-kasan-gce 2020/03/02 19:54 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-kasan-gce-selinux-root 2020/03/02 18:43 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-kasan-gce-selinux-root 2020/03/02 16:19 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-kasan-gce-root 2020/03/02 00:45 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-kasan-gce-386 2020/03/06 04:11 upstream 63623fd44972 c88c7b75 .config log report
ci-upstream-net-this-kasan-gce 2020/03/06 10:43 net 3614d05b5e6b c88c7b75 .config log report
ci-upstream-net-this-kasan-gce 2020/03/05 20:04 net 3614d05b5e6b c88c7b75 .config log report
ci-upstream-net-this-kasan-gce 2020/03/05 15:25 net 3614d05b5e6b c88c7b75 .config log report
ci-upstream-net-this-kasan-gce 2020/03/05 01:26 net 3614d05b5e6b c88c7b75 .config log report
ci-upstream-net-this-kasan-gce 2020/03/04 23:07 net 3614d05b5e6b c88c7b75 .config log report
ci-upstream-net-this-kasan-gce 2020/03/04 19:42 net 3614d05b5e6b c88c7b75 .config log report
ci-upstream-net-this-kasan-gce 2020/03/04 01:50 net 3614d05b5e6b c88c7b75 .config log report
ci-upstream-net-this-kasan-gce 2020/03/04 00:04 net 3614d05b5e6b c88c7b75 .config log report
ci-upstream-net-this-kasan-gce 2020/03/03 19:39 net 3614d05b5e6b c88c7b75 .config log report
ci-upstream-net-this-kasan-gce 2020/03/03 14:30 net 3614d05b5e6b c88c7b75 .config log report
ci-upstream-net-this-kasan-gce 2020/03/03 13:25 net 3614d05b5e6b c88c7b75 .config log report
ci-upstream-net-this-kasan-gce 2020/03/03 10:26 net 3614d05b5e6b c88c7b75 .config log report
ci-upstream-net-this-kasan-gce 2020/03/02 22:21 net 3614d05b5e6b c88c7b75 .config log report
ci-upstream-net-this-kasan-gce 2020/03/02 18:38 net 3614d05b5e6b c88c7b75 .config log report
ci-upstream-net-this-kasan-gce 2020/03/02 14:58 net 3614d05b5e6b c88c7b75 .config log report
ci-upstream-net-this-kasan-gce 2020/03/02 05:26 net 3614d05b5e6b c88c7b75 .config log report
ci-upstream-net-this-kasan-gce 2020/03/02 03:52 net 3614d05b5e6b c88c7b75 .config log report
ci-upstream-net-this-kasan-gce 2020/02/18 17:35 net 9b64208f74fb 012fbc32 .config log report
ci-upstream-net-kasan-gce 2020/03/06 18:03 net-next 3b3e808cd883 c88c7b75 .config log report
ci-upstream-net-kasan-gce 2020/03/03 16:57 net-next 3b3e808cd883 c88c7b75 .config log report
ci-upstream-net-kasan-gce 2020/03/03 06:42 net-next 3b3e808cd883 c88c7b75 .config log report
ci-upstream-net-kasan-gce 2020/03/03 03:41 net-next 3b3e808cd883 c88c7b75 .config log report
ci-upstream-net-kasan-gce 2020/03/02 13:58 net-next 3b3e808cd883 c88c7b75 .config log report
ci-upstream-net-kasan-gce 2020/03/02 09:23 net-next 3b3e808cd883 c88c7b75 .config log report
ci-upstream-net-kasan-gce 2020/03/02 05:40 net-next 3b3e808cd883 c88c7b75 .config log report
ci-upstream-net-kasan-gce 2020/03/02 02:25 net-next 3b3e808cd883 c88c7b75 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/03/05 04:01 linux-next c99b17ac0399 c88c7b75 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/03/04 03:23 linux-next c99b17ac0399 c88c7b75 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/03/03 21:33 linux-next c99b17ac0399 c88c7b75 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/03/03 20:04 linux-next c99b17ac0399 c88c7b75 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/03/03 00:03 linux-next c99b17ac0399 c88c7b75 .config log report