syzbot


INFO: rcu detected stall in netlink_sendmsg (4)
Status: upstream: reported C repro on 2020/03/31 17:43
Reported-by: syzbot+0fb70e87d8e0ac278fe9@syzkaller.appspotmail.com
First crash: 388d, last: 2d03h

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 netlink_sendmsg (2) C done 11 584d 590d 14/22 fixed on 2019/10/09 10:54
linux-4.19 INFO: rcu detected stall in netlink_sendmsg C done 3 583d 587d 1/1 fixed on 2019/12/10 03:52
upstream INFO: rcu detected stall in netlink_sendmsg (3) C done 6 435d 488d 16/22 fixed on 2020/02/18 14:31
upstream INFO: rcu detected stall in netlink_sendmsg syz 83 794d 849d 12/22 fixed on 2019/03/06 07:43
linux-4.19 BUG: soft lockup in netlink_sendmsg C 2 19d 19d 0/1 upstream: reported C repro on 2021/04/02 18:46

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-root 2021/03/23 14:54 upstream 84196390 51095195 .config log syz C
ci-upstream-kasan-gce-root 2021/01/30 13:16 upstream 0e9bcda5 51095195 .config log syz C
ci-upstream-kasan-gce-root 2020/12/31 12:50 upstream f6e1ea19 51095195 .config log syz C
ci-upstream-kasan-gce-root 2020/12/01 12:25 upstream b6505459 51095195 .config log syz C
ci-upstream-kasan-gce-root 2020/11/01 12:01 upstream c2dc4c07 51095195 .config log syz C
ci-upstream-kasan-gce-root 2020/10/01 21:09 upstream 44b6e23b 51095195 .config log syz C
ci-upstream-kasan-gce-root 2020/08/25 19:28 upstream 6a9dc5fd 51095195 .config log report syz C
Crashes (13):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-root 2020/07/06 10:25 upstream 7cc2a8ea 51095195 .config log report syz C
ci-upstream-net-kasan-gce 2020/07/06 08:15 net-next e44f65fd 51095195 .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2020/07/06 06:09 linux-next 9e50b94b 51095195 .config log report syz C
ci-upstream-bpf-kasan-gce 2021/04/19 20:17 bpf b0226542 50f523d7 .config log report info INFO: rcu detected stall in netlink_sendmsg
ci-upstream-net-kasan-gce 2021/02/21 14:25 net-next 38b5133a 3e5ed8b4 .config log report info INFO: rcu detected stall in netlink_sendmsg
ci-upstream-kasan-gce-root 2020/07/26 02:00 upstream 23ee3e4e 1f7cc1ca .config log report
ci-upstream-kasan-gce 2020/07/08 10:27 upstream 7cc2a8ea 51095195 .config log report
ci-upstream-kasan-gce-root 2020/07/06 17:52 upstream 7cc2a8ea 51095195 .config log report
ci-upstream-kasan-gce-selinux-root 2020/06/26 22:00 upstream 4a21185c aea82c00 .config log report
ci-upstream-net-this-kasan-gce 2020/05/06 07:04 net 38212bb3 35b8eb30 .config log report
ci-upstream-net-this-kasan-gce 2020/04/17 13:39 net 2fcd8014 18397578 .config log report
ci-upstream-bpf-next-kasan-gce 2020/03/29 09:57 bpf-next ae661dec 05736b29 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/07/06 02:41 linux-next 9e50b94b 51095195 .config log report