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: 507d, last: 1d02h

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 509d 509d 0/3 auto-closed as invalid on 2020/03/28 16:57
linux-4.14 INFO: task hung in synchronize_rcu C error 100 4d17h 531d 0/1 upstream: reported C repro on 2019/11/07 04:32
linux-4.19 INFO: task hung in synchronize_rcu 20 2d20h 530d 0/1 upstream: reported on 2019/11/08 21:27
upstream INFO: task hung in synchronize_rcu syz done 1206 509d 535d 15/22 fixed on 2019/11/29 15:48
android-414 INFO: task hung in synchronize_rcu 1 527d 527d 0/1 auto-closed as invalid on 2020/03/10 10:42
upstream INFO: task hung in synchronize_rcu (2) 8 508d 509d 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 659caaf6 21f1765e .config log syz C
ci-upstream-kasan-gce-386 2020/08/21 00:30 upstream da2968ff 21f1765e .config log syz C
Crashes (208):
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 4fa640dc 21f1765e .config log report syz C
ci-upstream-kasan-gce-selinux-root 2021/02/25 03:46 upstream 719bbd4a fcc6d71b .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-root 2021/02/01 08:51 upstream 1048ba83 fc9fd31e .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-selinux-root 2021/02/01 07:44 upstream 1048ba83 fc9fd31e .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-386 2021/02/26 18:56 upstream 2c87f7a3 4c37c133 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-kasan-gce 2021/04/10 10:42 bpf afd0be72 bfeda1b1 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-kasan-gce 2021/04/09 23:56 bpf afd0be72 6a81331a .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-kasan-gce 2021/04/08 05:06 bpf 144748eb 6a81331a .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-kasan-gce 2021/02/25 03:44 bpf f566aac4 fcc6d71b .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-kasan-gce 2021/02/07 13:40 bpf 6183f4d3 2ce644fc .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-kasan-gce 2021/02/06 03:34 bpf 6183f4d3 23a562df .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-kasan-gce 2021/02/05 13:14 bpf 6183f4d3 23a562df .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-kasan-gce 2021/01/31 02:02 bpf 06cc6e5d fc9fd31e .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/04/20 20:35 bpf-next 69443c47 c0ced557 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/04/18 12:14 bpf-next cdf0e80e 7e2b734b .config log report info INFO: task hung in synchronize_rcu
ci-upstream-net-kasan-gce 2021/04/17 19:46 net-next e7ad33fa 7e2b734b .config log report info INFO: task hung in synchronize_rcu
ci-upstream-net-kasan-gce 2021/04/08 05:29 net-next 0b35e0de 6a81331a .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/04/03 09:37 bpf-next 007bdc12 6a81331a .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/03/28 16:29 bpf-next 36e79851 a8529b82 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/03/03 08:46 bpf-next 85e142cb e5b64d68 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/03/02 05:30 bpf-next 85e142cb 183afb6c .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/02/19 00:05 bpf-next 7b1e385c 14052202 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/02/08 19:50 bpf-next 23a2d70c 2ce644fc .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/02/07 11:52 bpf-next 23a2d70c 2ce644fc .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/01/27 14:45 bpf-next 86ce322d a0ebf917 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/01/25 20:53 bpf-next 6e66fbb1 52e37319 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-bpf-next-kasan-gce 2021/01/19 08:56 bpf-next a2c2998d 63631df1 .config log report info INFO: task hung in synchronize_rcu
ci-upstream-linux-next-kasan-gce-root 2021/04/14 06:35 linux-next dcf1b51d a184b83e .config log report info INFO: task hung in synchronize_rcu
ci-upstream-kasan-gce-selinux-root 2021/01/10 07:20 upstream 2ff90100 2c1f2513 .config log report info
ci-upstream-kasan-gce-root 2021/01/02 23:56 upstream 3516bd72 79264ae3 .config log report info
ci-upstream-kasan-gce-selinux-root 2020/12/27 20:38 upstream f838f8d2 2242f77f .config log report info
ci-upstream-kasan-gce-smack-root 2020/04/11 14:29 upstream 5b8b9d0c a8c6a3f8 .config log report
ci-upstream-kasan-gce 2020/01/22 16:40 upstream d96d875e 8eda0b95 .config log report
ci-upstream-kasan-gce-root 2019/12/01 07:56 upstream 32ef9553 a76bf83f .config log report
ci-upstream-kasan-gce-386 2020/12/27 21:40 upstream f838f8d2 2242f77f .config log report info
ci-upstream-bpf-kasan-gce 2020/12/28 04:23 bpf a61daaf3 2242f77f .config log report info
ci-upstream-net-this-kasan-gce 2020/06/08 03:32 net 4d3da2d8 7751efd0 .config log report
ci-upstream-bpf-next-kasan-gce 2021/01/16 01:18 bpf-next eed6a9a9 65a7a854 .config log report info
ci-upstream-net-kasan-gce 2021/01/16 01:12 net-next e7fa5c80 65a7a854 .config log report info
ci-upstream-bpf-next-kasan-gce 2021/01/05 20:57 bpf-next 482ec343 a0234d98 .config log report info
ci-upstream-bpf-next-kasan-gce 2021/01/03 03:48 bpf-next 482ec343 79264ae3 .config log report info
ci-upstream-bpf-next-kasan-gce 2021/01/02 11:19 bpf-next 482ec343 79264ae3 .config log report info
ci-upstream-net-kasan-gce 2020/12/30 15:00 net-next 3db1a3fa ecb8c012 .config log report info
ci-upstream-bpf-next-kasan-gce 2020/12/29 06:49 bpf-next 00a279e4 8259d56c .config log report info
ci-upstream-bpf-next-kasan-gce 2020/12/17 00:15 bpf-next 3db1a3fa 04201c06 .config log report info
ci-upstream-bpf-next-kasan-gce 2020/12/16 16:09 bpf-next 3db1a3fa f213e07e .config log report info
ci-upstream-bpf-next-kasan-gce 2020/12/16 01:09 bpf-next 0e12c027 97183ed7 .config log report info
ci-upstream-bpf-next-kasan-gce 2020/12/15 17:45 bpf-next 0e12c027 97183ed7 .config log report info
ci-upstream-bpf-next-kasan-gce 2020/12/14 23:09 bpf-next 2e33f831 97183ed7 .config log report info
ci-upstream-bpf-next-kasan-gce 2020/12/13 14:12 bpf-next b4fe9fec bca53db9 .config log report info
ci-upstream-bpf-next-kasan-gce 2020/12/11 19:24 bpf-next b4fe9fec ba24ffcd .config log report info
ci-upstream-bpf-next-kasan-gce 2020/12/09 02:17 bpf-next 2f4b0319 a7f7f4a4 .config log report info
ci-upstream-net-kasan-gce 2020/12/08 20:42 net-next 8e98387b a7f7f4a4 .config log report info
ci-upstream-bpf-next-kasan-gce 2020/12/08 10:49 bpf-next e1868b9e 51a9082e .config log report info
ci-upstream-bpf-next-kasan-gce 2020/12/08 06:55 bpf-next e1868b9e 51a9082e .config log report info
ci-upstream-bpf-next-kasan-gce 2020/12/06 22:59 bpf-next 34da8721 c521566d .config log report info
ci-upstream-net-kasan-gce 2020/12/06 21:50 net-next 4054eebf c521566d .config log report info
ci-upstream-bpf-next-kasan-gce 2020/12/06 16:23 bpf-next 34da8721 f12ba0c5 .config log report info
ci-upstream-bpf-next-kasan-gce 2020/12/03 10:46 bpf-next 97306be4 e6b0d314 .config log report info
ci-upstream-linux-next-kasan-gce-root 2020/10/08 05:24 linux-next 8b787da7 1880b4a9 .config log report info