syzbot


possible deadlock in send_sigio
Status: fixed on 2020/05/10 10:41
Reported-by: syzbot+a9fb1457d720a55d6dc5@syzkaller.appspotmail.com
Fix commit: 63f818f46af9 proc: Use a dedicated lock in struct pid
First crash: 611d, last: 602d

Cause bisection: introduced by (bisect log) :
commit 7bc3e6e55acf065500a24621f3b313e7e5998acf
Author: Eric W. Biederman <ebiederm@xmission.com>
Date: Thu Feb 20 00:22:26 2020 +0000

  proc: Use a list of inodes to flush from proc

Crash: possible deadlock in send_sigio (log)
Repro: C syz .config
similar bugs (3):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 possible deadlock in send_sigio (2) 1 419d 419d 0/1 auto-closed as invalid on 2021/02/09 04:22
upstream possible deadlock in send_sigio (2) C done done 40 340d 452d 21/22 fixed on 2021/03/10 01:48
linux-4.14 possible deadlock in send_sigio 1 585d 585d 0/1 auto-closed as invalid on 2020/08/27 14:07

Sample crash report:

Crashes (7):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-root 2020/04/03 19:27 upstream bef7b2a7be28 5ed396e6 .config log report syz C
ci-upstream-kasan-gce-smack-root 2020/04/10 04:52 upstream 5d30bcacd91a a8c6a3f8 .config log report
ci-upstream-kasan-gce-root 2020/04/06 19:53 upstream 7e63420847ae 99a96044 .config log report
ci-upstream-kasan-gce-root 2020/04/03 18:19 upstream bef7b2a7be28 5ed396e6 .config log report
ci-upstream-net-this-kasan-gce 2020/04/12 20:57 net e6aaeafd56e3 36b0b050 .config log report
ci-upstream-net-this-kasan-gce 2020/04/12 14:47 net 3b72f84f8fb6 36b0b050 .config log report
ci-upstream-net-this-kasan-gce 2020/04/10 05:29 net 690cc86321eb a8c6a3f8 .config log report