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: 686d, last: 8h54m

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 687d 687d 0/3 auto-closed as invalid on 2020/03/28 16:57
linux-4.14 INFO: task hung in synchronize_rcu C error 116 11h33m 710d 0/1 upstream: reported C repro on 2019/11/07 04:32
linux-4.19 INFO: task hung in synchronize_rcu 27 13d 708d 0/1 upstream: reported on 2019/11/08 21:27
upstream INFO: task hung in synchronize_rcu syz done 1206 687d 713d 15/22 fixed on 2019/11/29 15:48
android-414 INFO: task hung in synchronize_rcu 1 705d 705d 0/1 auto-closed as invalid on 2020/03/10 10:42
upstream INFO: task hung in synchronize_rcu (2) 8 686d 687d 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 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 (295):
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-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-root 2021/07/15 07:20 upstream 8096acd7442e b9a2f64e .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-selinux-root 2021/07/07 04:26 upstream 3dbdb38e2869 cca78469 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce 2021/06/24 01:22 upstream 7266f2030eb0 fe4ab389 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-smack-root 2021/06/20 10:19 upstream 913ec3c22ef4 aba2b2fb .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-selinux-root 2021/05/25 17:37 upstream a050a6d2b7e8 93d3a9f6 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-root 2021/05/24 18:28 upstream c4681547bcce 3c7fef33 .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-kasan-gce-386 2021/06/13 07:39 upstream 8ecfa36cd4db 1ba81399 .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-kasan-gce 2021/08/03 03:30 bpf b98677d3ea55 6c236867 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-kasan-gce 2021/08/02 03:14 bpf b4f0c24a5eaf 6c236867 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-kasan-gce 2021/07/28 19:12 bpf f1fdee33f5b4 17d6ab15 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-net-this-kasan-gce 2021/07/03 08:37 net dbe69e433722 55aa55c2 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-net-this-kasan-gce 2021/06/20 13:08 net dda2626b86c2 aba2b2fb .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-kasan-gce 2021/06/19 17:36 bpf 61e8aeda9398 aba2b2fb .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-kasan-gce 2021/06/18 06:12 bpf da5ac772cfe2 aba2b2fb .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-kasan-gce 2021/06/16 03:58 bpf a4f0377db125 990d3cbe .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-kasan-gce 2021/06/15 03:39 bpf 973377ffe814 1ba81399 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-net-this-kasan-gce 2021/06/13 09:17 net f4cdcae03f9c 1ba81399 .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-bpf-next-kasan-gce 2021/07/26 16:33 bpf-next 2b7e9f25e590 fd511809 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-net-kasan-gce 2021/07/13 09:08 net-next 5e437416ff66 f415556d .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/06/11 08:04 bpf-next 380afe720896 1ba81399 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/06/05 10:37 bpf-next cf68fa431d5d 500c2339 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/06/04 01:00 bpf-next 56b8b7f9533b 0740de69 .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-linux-next-kasan-gce-root 2021/07/20 19:46 linux-next c1a6d08348fc 1b201b48 .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