syzbot


WARNING: refcount bug in blk_mq_free_request (2)
Status: fixed on 2020/06/30 18:57
Reported-by: syzbot+f4316dab9d4518b755eb@syzkaller.appspotmail.com
Fix commit: de6346ec nbd: protect cmd->status with cmd->lock
First crash: 525d, last: 485d

Cause bisection: introduced by (bisect log) :
commit 12f5b93145450c750f315657ef239a314811aeeb
Author: Keith Busch <keith.busch@intel.com>
Date: Tue May 29 13:52:28 2018 +0000

  blk-mq: Remove generation seqeunce

Crash: WARNING in blk_mq_bio_to_request (log)
Repro: C syz .config

Fix bisection: failed (bisect log)
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING: refcount bug in blk_mq_free_request 1 734d 728d 0/17 auto-closed as invalid on 2019/05/29 00:00

Sample crash report:

Crashes (5):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Maintainers
ci-upstream-kasan-gce-selinux-root 2019/08/05 18:22 upstream e21a712a 6affd8e8 .config log report syz C axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kasan-gce-root 2019/08/05 17:51 upstream e21a712a 6affd8e8 .config log report syz C axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root 2019/08/05 19:15 linux-next b1645c0c 6affd8e8 .config log report syz C axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-kasan-gce-root 2019/08/05 17:14 upstream e21a712a 6affd8e8 .config log report axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
ci-upstream-linux-next-kasan-gce-root 2019/06/26 03:24 linux-next 90203176 0a8d1a96 .config log report axboe@kernel.dk, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org