syzbot


INFO: task hung in pipe_release (2)
Status: fixed on 2020/09/25 01:17
Reported-by: syzbot+61acc40a49a3e46e25ea@syzkaller.appspotmail.com
Fix commit: 7e249690 block: allow for_each_bvec to support zero len bvec
First crash: 135d, last: 26d

Cause bisection: introduced by (bisect log):

commit fddb5d430ad9fa91b49b1d34d0202ffe2fa0e179
Author: Aleksa Sarai <cyphar@cyphar.com>
Date: Sat Jan 18 12:07:59 2020 +0000

  open: introduce openat2(2) syscall

Crash: INFO: task hung in pipe_release (log)
Repro: syz .config
duplicates (1):
Title Repro Bisected Count Last Reported Patched Status
INFO: task can't die in pipe_release syz 1 59d 55d 0/17 closed as dup on 2020/08/07 10:37
similar bugs (4):
Kernel Title Repro Bisected Count Last Reported Patched Status
android-414 INFO: task hung in pipe_release 1 429d 429d 0/1 auto-closed as invalid on 2019/11/24 16:38
android-49 INFO: task hung in pipe_release (2) 1 393d 393d 0/3 auto-closed as invalid on 2019/12/30 22:08
android-49 INFO: task hung in pipe_release 2 622d 533d 0/3 auto-closed as invalid on 2019/07/14 20:38
upstream INFO: task hung in pipe_release 2 519d 684d 0/17 auto-closed as invalid on 2019/10/25 10:11

Sample crash report:

Fix bisection attempts:
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info
ci-upstream-kasan-gce-root 2020/09/02 17:25 upstream 9c7d619b 19a8de55 .config log report syz
Crashes (3):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Maintainers
ci-upstream-kasan-gce-root 2020/07/29 18:17 upstream 6ba1b005 19a8de55 .config log report syz linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-kasan-gce-386 2020/07/28 10:03 upstream 92ed3019 cb93dc6a .config log report linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk
ci-upstream-net-kasan-gce 2020/05/16 09:42 net-next ea6119aa 37bccd4e .config log report linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, viro@zeniv.linux.org.uk