syzbot


INFO: rcu detected stall in cleanup_net (4)
Status: fixed on 2020/10/10 01:52
Reported-by: syzbot+8267241609ae8c23b248@syzkaller.appspotmail.com
Fix commit: b5b73b26b3ca taprio: Fix allowing too small intervals
First crash: 442d, last: 381d

Cause bisection: introduced by (bisect log) :
commit 5a781ccbd19e4664babcbe4b4ead7aa2b9283d22
Author: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Date: Sat Sep 29 00:59:43 2018 +0000

  tc: Add support for configuring the taprio scheduler

Crash: no output from test machine (log)
Repro: C syz .config
similar bugs (5):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in cleanup_net (3) 1 736d 736d 0/22 auto-closed as invalid on 2019/12/15 02:54
linux-4.19 INFO: rcu detected stall in cleanup_net (2) 4 86d 218d 0/1 upstream: reported on 2021/02/15 06:21
upstream INFO: rcu detected stall in cleanup_net 5 1168d 1236d 0/22 closed as invalid on 2018/09/05 12:51
linux-4.19 INFO: rcu detected stall in cleanup_net 1 608d 608d 0/1 auto-closed as invalid on 2020/05/21 02:17
upstream INFO: rcu detected stall in cleanup_net (2) 1 1079d 1075d 0/22 auto-closed as invalid on 2019/04/05 22:14

Sample crash report:

Crashes (5):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2020/09/05 05:12 upstream 59126901f200 abf9ba4f .config log report syz C
ci-upstream-kasan-gce-smack-root 2020/07/08 09:32 upstream 7cc2a8ea1048 51095195 .config log report
ci-upstream-kasan-gce-selinux-root 2020/07/05 17:01 upstream 7cc2a8ea1048 51095195 .config log report
ci-upstream-net-kasan-gce 2020/08/31 15:47 net-next 0f091e43310f d5a3ae1f .config log report
ci-upstream-linux-next-kasan-gce-root 2020/07/19 22:33 linux-next 4c43049f19a2 9c812472 .config log report