syzbot


possible deadlock in io_timeout_fn
Status: fixed on 2020/09/16 22:51
Reported-by: syzbot+ef4b654b49ed7ff049bf@syzkaller.appspotmail.com
Fix commit: 51a4cc11 io_uring: defer file table grabbing request cleanup for locked requests
First crash: 50d, last: 46d

Cause bisection: introduced by (bisect log):

commit e62753e4e2926f249d088cc0517be5ed4efec6d6
Author: Bijan Mottahedeh <bijan.mottahedeh@oracle.com>
Date: Sat May 23 04:31:18 2020 +0000

  io_uring: call statx directly

Crash: possible deadlock in io_timeout_fn (log)
Repro: C syz .config

Sample crash report:

Crashes (4):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Maintainers
ci-upstream-kasan-gce-root 2020/08/11 05:31 upstream fc80c51f 7adc7b65 .config log report syz C axboe@kernel.dk, io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-kasan-gce-selinux-root 2020/08/09 19:50 upstream 06a81c1c 70301872 .config log report syz C axboe@kernel.dk, io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-kasan-gce-smack-root 2020/08/09 03:50 upstream 449dc8c9 f721e4a0 .config log report syz C axboe@kernel.dk, io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-linux-next-kasan-gce-root 2020/08/13 03:45 linux-next bc09acc9 bc15f7db .config log report syz C axboe@kernel.dk, io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk