syzbot


general protection fault in io_poll_double_wake
Status: fixed on 2020/09/16 22:51
Reported-by: syzbot+7f617d4a9369028b8a2c@syzkaller.appspotmail.com
Fix commit: d4e7cd36 io_uring: sanitize double poll handling
First crash: 37d, last: 9d14h

Cause bisection: introduced by (bisect log):

commit 18bceab101adde8f38de76016bc77f3f25cf22f4
Author: Jens Axboe <axboe@kernel.dk>
Date: Fri May 15 17:56:54 2020 +0000

  io_uring: allow POLL_ADD with double poll_wait() users

Crash: WARNING: refcount bug in io_poll_remove_double (log)
Repro: C syz .config
duplicates (1):
Title Repro Bisected Count Last Reported Patched Status
possible deadlock in io_poll_double_wake C 17 9d14h 37d 0/17 closed as dup on 2020/08/15 18:15

Sample crash report:

Crashes (8):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Maintainers
ci-upstream-kasan-gce-root 2020/08/16 21:16 upstream 2cc3c4b3 424dd8e7 .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 2020/08/15 18:58 upstream c9c9735c 424dd8e7 .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 2020/08/15 06:43 upstream 7fca4dee 424dd8e7 .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 2020/08/19 05:23 linux-next 83c52faa e1c29030 .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 2020/09/03 13:39 upstream fc3abb53 abf9ba4f .config log report 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 2020/08/15 06:28 upstream 7fca4dee 424dd8e7 .config log report 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 2020/09/12 15:13 linux-next d5b2251d ce441f06 .config log report 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 2020/08/23 18:22 linux-next 494d311a cef5ae68 .config log report axboe@kernel.dk, io-uring@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk