syzbot


possible deadlock in refcount_dec_and_mutex_lock
Status: fixed on 2020/01/25 22:00
Reported-by: syzbot+6921901d8a8ec5b51d40@syzkaller.appspotmail.com
Fix commit: 4df72865 nbd: verify socket is supported during setup
First crash: 223d, last: 150d

Fix bisection: fixed by (bisect log):

commit 4df728651b8a99693c69962d8e5a5b9e5a3bbcc7
Author: Mike Christie <mchristi@redhat.com>
Date: Thu Oct 17 21:27:34 2019 +0000

  nbd: verify socket is supported during setup

similar bugs (2):
Kernel Title Repro Bisected Count Last Reported Patched Status
upstream possible deadlock in refcount_dec_and_mutex_lock 1 246d 242d 0/17 auto-closed as invalid on 2019/11/20 04:39
linux-4.19 possible deadlock in refcount_dec_and_mutex_lock C cause+fix 5 147d 203d 1/1 fixed on 2020/01/28 16:29

Sample crash report:

Crashes (10):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro Maintainers
ci2-linux-4-14 2019/11/03 06:31 linux-4.14.y ddef1e8e d603afc9 .config log report syz C jbacik@fb.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, nbd@other.debian.org
ci2-linux-4-14 2019/11/03 00:09 linux-4.14.y ddef1e8e d603afc9 .config log report syz jbacik@fb.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, nbd@other.debian.org
ci2-linux-4-14 2019/12/26 06:58 linux-4.14.y e1f7d50a be5c2c81 .config log report jbacik@fb.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, nbd@other.debian.org
ci2-linux-4-14 2019/12/25 14:05 linux-4.14.y e1f7d50a be5c2c81 .config log report jbacik@fb.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, nbd@other.debian.org
ci2-linux-4-14 2019/12/16 08:33 linux-4.14.y a844dc4c eef6e580 .config log report jbacik@fb.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, nbd@other.debian.org
ci2-linux-4-14 2019/11/17 04:35 linux-4.14.y 775d01b6 cdac920b .config log report jbacik@fb.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, nbd@other.debian.org
ci2-linux-4-14 2019/11/12 21:24 linux-4.14.y 4762bcd4 048f2d49 .config log report jbacik@fb.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, nbd@other.debian.org
ci2-linux-4-14 2019/11/03 06:03 linux-4.14.y ddef1e8e d603afc9 .config log report jbacik@fb.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, nbd@other.debian.org
ci2-linux-4-14 2019/11/02 21:13 linux-4.14.y ddef1e8e d603afc9 .config log report jbacik@fb.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, nbd@other.debian.org
ci2-linux-4-14 2019/10/14 22:07 linux-4.14.y e132c8d7 05ad7292 .config log report jbacik@fb.com, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, nbd@other.debian.org