syzbot


INFO: rcu detected stall in cleanup_net (4)
Status: upstream: reported C repro on 2020/09/09 05:29
Reported-by: syzbot+8267241609ae8c23b248@syzkaller.appspotmail.com
Fix commit: b5b73b26 taprio: Fix allowing too small intervals
Patched on: [ci-qemu-upstream ci-qemu-upstream-386 ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-leak ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-kcsan-gce], missing on: [ci-upstream-kmsan-gce ci-upstream-kmsan-gce-386 ci2-upstream-usb]
First crash: 85d, last: 23d

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 (4):
Kernel Title Repro Bisected Count Last Reported Patched Status
upstream INFO: rcu detected stall in cleanup_net (3) 1 379d 379d 0/17 auto-closed as invalid on 2019/12/15 02:54
upstream INFO: rcu detected stall in cleanup_net 5 810d 878d 0/17 closed as invalid on 2018/09/05 12:51
linux-4.19 INFO: rcu detected stall in cleanup_net 1 251d 251d 0/1 auto-closed as invalid on 2020/05/21 02:17
upstream INFO: rcu detected stall in cleanup_net (2) 1 722d 718d 0/17 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 Maintainers
ci-upstream-kasan-gce-selinux-root 2020/09/05 05:12 upstream 59126901 abf9ba4f .config log report syz C linux-kernel@vger.kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root 2020/07/08 09:32 upstream 7cc2a8ea 51095195 .config log report linux-kernel@vger.kernel.org, tglx@linutronix.de
ci-upstream-kasan-gce-selinux-root 2020/07/05 17:01 upstream 7cc2a8ea 51095195 .config log report linux-kernel@vger.kernel.org, tglx@linutronix.de
ci-upstream-net-kasan-gce 2020/08/31 15:47 net-next 0f091e43 d5a3ae1f .config log report fweisbec@gmail.com, linux-kernel@vger.kernel.org, mingo@kernel.org, tglx@linutronix.de
ci-upstream-linux-next-kasan-gce-root 2020/07/19 22:33 linux-next 4c43049f 9c812472 .config log report linux-kernel@vger.kernel.org, tglx@linutronix.de