syzbot


INFO: task hung in synchronize_rcu (3)
Status: upstream: reported C repro on 2020/07/22 18:22
Reported-by: syzbot+0c6da80218456f1edc36@syzkaller.appspotmail.com
First crash: 788d, last: 14d

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: INFO: rcu detected stall in smp_call_function (log)
Repro: C syz .config
similar bugs (6):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-49 INFO: task hung in synchronize_rcu 1 790d 790d 0/3 auto-closed as invalid on 2020/03/28 16:57
linux-4.14 INFO: task hung in synchronize_rcu C error 155 7d21h 812d 0/1 upstream: reported C repro on 2019/11/07 04:32
linux-4.19 INFO: task hung in synchronize_rcu 51 11d 811d 0/1 upstream: reported on 2019/11/08 21:27
upstream INFO: task hung in synchronize_rcu syz done 1206 790d 816d 15/22 fixed on 2019/11/29 15:48
android-414 INFO: task hung in synchronize_rcu 1 808d 808d 0/1 auto-closed as invalid on 2020/03/10 10:42
upstream INFO: task hung in synchronize_rcu (2) 8 789d 790d 0/22 closed as invalid on 2019/11/30 16:54

Sample crash report:

Fix bisection attempts:
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-386 2021/12/14 08:29 upstream 5472f14a3742 21f1765e .config log report syz C
ci-upstream-kasan-gce-386 2020/11/07 08:02 upstream 659caaf65dc9 21f1765e .config log syz C
ci-upstream-kasan-gce-386 2020/08/21 00:30 upstream da2968ff879b 21f1765e .config log syz C
Crashes (326):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-386 2020/07/22 00:02 upstream 4fa640dc5230 21f1765e .config log report syz C
ci-upstream-kasan-gce 2021/10/28 01:40 upstream d25f27432f80 373bf66b .config log report syz INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-smack-root 2022/01/13 09:15 upstream f079ab01b560 44d1319a .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce 2022/01/10 08:00 upstream df0cc57e057f 2ca0d385 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce 2022/01/09 17:03 upstream 4634129ad9fd 2ca0d385 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-selinux-root 2021/12/25 07:00 upstream b927dfc67d05 6caa12e4 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-root 2021/12/22 20:59 upstream 3f066e882bf1 6caa12e4 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce 2021/11/14 07:41 upstream ccfff0a2bd2a 83f5c9b5 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce 2021/11/14 05:43 upstream ccfff0a2bd2a 83f5c9b5 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce 2021/11/13 06:22 upstream 7246f4dcaccc 83f5c9b5 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce 2021/11/11 13:14 upstream debe436e77c7 75b04091 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce 2021/11/11 04:08 upstream 89d714ab6043 75b04091 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-smack-root 2021/11/11 00:26 upstream 89d714ab6043 75b04091 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-selinux-root 2021/11/09 17:22 upstream d2f38a3c6507 59bcaf9a .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-smack-root 2021/11/07 04:31 upstream 512b7931ad05 4c1be0be .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-selinux-root 2021/11/05 23:37 upstream fe91c4725aee 4c1be0be .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce 2021/11/05 04:10 upstream 7ddb58cb0eca 4c1be0be .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce 2021/11/04 09:48 upstream ce840177930f 4c1be0be .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-smack-root 2021/11/04 00:06 upstream dcd68326d29b 4c1be0be .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce 2021/11/02 19:31 upstream bfc484fe6abb 17f3edd2 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-root 2021/11/02 10:40 upstream d2fac0afe89f 098b5d53 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce 2021/11/02 06:54 upstream e66435936756 098b5d53 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-root 2021/10/23 21:08 upstream 9c0c4d24ac00 282f03fb .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce 2021/10/20 09:28 upstream d9abdee5fd5a 466b7db1 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-root 2021/10/12 11:42 upstream fa5878760579 838e7e2c .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce 2021/10/03 22:01 upstream 6761a0ae9895 db0f5787 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-386 2021/11/06 20:31 upstream fe91c4725aee 4c1be0be .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-386 2021/09/11 11:46 upstream 926de8c4326c 5ae8508a .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-kasan-gce 2021/10/22 08:21 bpf 1acfe7c9b44b 55f90bc6 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-kasan-gce 2021/09/27 21:21 bpf 2248c2fca9c2 78494d16 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-net-this-kasan-gce 2021/09/16 15:34 net 98dc68f8b0c2 aae492f2 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-kasan-gce 2021/09/10 08:00 bpf 57f780f1c433 e2776ee4 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-kasan-gce 2021/08/25 21:30 bpf 5b029a32cfe4 b599f2fc .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-kasan-gce 2021/08/21 00:26 bpf 316749009fdf b599f2fc .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-kasan-gce 2021/08/13 19:44 bpf 3776f3517ed9 3fd2ea69 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/10/19 14:52 bpf-next 223f903e9c83 24dc29db .config log report info INFO: task hung in synchronize_rcu
ci-upstream-net-kasan-gce 2021/10/16 23:53 net-next 4e6e167bc049 0c5d9412 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-net-kasan-gce 2021/10/15 16:19 net-next 40088915f547 0c5d9412 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/10/14 05:51 bpf-next 431bfb9ee3e2 5462d470 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/09/30 14:19 bpf-next 161ecd537948 be530f6c .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/09/28 12:32 bpf-next 4c9f09372046 78494d16 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/09/13 08:31 bpf-next 3384c7c7641b 5ae8508a .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/09/08 22:47 bpf-next 006a5099fc18 e2776ee4 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/09/07 02:30 bpf-next 27151f177827 6ca60148 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/09/04 04:32 bpf-next a16ef91aa61a d236a457 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/08/23 17:25 bpf-next d359902d5c35 b599f2fc .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/08/21 16:50 bpf-next f2a6ee924d26 b599f2fc .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/08/18 21:06 bpf-next 8cacfc85b615 a2fe1cb5 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/08/18 07:54 bpf-next 3c3bd542ffbb a2fe1cb5 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-net-kasan-gce 2021/08/14 08:24 net-next b697d9d38a5a 2489ab88 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-net-kasan-gce 2021/08/08 07:30 net-next f9be84db09d2 6972b106 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/08/06 03:51 bpf-next 372642ea83ff d2d6e680 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-linux-next-kasan-gce-root 2021/11/13 12:42 linux-next f2e19fd15bd7 83f5c9b5 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-linux-next-kasan-gce-root 2021/11/10 17:51 linux-next 73e5c18006f5 75b04091 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-linux-next-kasan-gce-root 2021/10/30 04:02 linux-next bdcc9f6a5682 098b5d53 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-linux-next-kasan-gce-root 2021/10/16 17:37 linux-next 7c832d2f9b95 0c5d9412 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-linux-next-kasan-gce-root 2021/09/27 19:28 linux-next bf5b1e621a51 78494d16 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-linux-next-kasan-gce-root 2021/09/27 01:42 linux-next 5a5d008887b4 78494d16 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-root 2019/12/01 07:56 upstream 32ef9553635a a76bf83f .config log report
ci-upstream-bpf-next-kasan-gce 2021/01/16 01:18 bpf-next eed6a9a9571b 65a7a854 .config log report info
ci-upstream-linux-next-kasan-gce-root 2021/11/13 01:25 linux-next f2e19fd15bd7 83f5c9b5 .config log report info INFO: task can't die in __synchronize_srcu