syzbot


INFO: rcu detected stall in addrconf_dad_work (5)
Status: upstream: reported C repro on 2020/09/07 15:59
Reported-by: syzbot+251463bfa779ca087ad1@syzkaller.appspotmail.com
First crash: 229d, last: 19d

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 (7):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in addrconf_dad_work (4) 8 468d 469d 0/22 closed as invalid on 2020/01/09 08:13
upstream INFO: rcu detected stall in addrconf_dad_work (3) 6 469d 469d 0/22 closed as invalid on 2020/01/08 05:23
linux-4.14 INFO: rcu detected stall in addrconf_dad_work C done 18 585d 592d 1/1 fixed on 2019/12/06 10:33
upstream INFO: rcu detected stall in addrconf_dad_work (2) 15 503d 505d 0/22 closed as invalid on 2019/12/04 14:14
upstream INFO: rcu detected stall in addrconf_dad_work C done 126 583d 588d 14/22 fixed on 2019/10/09 10:54
linux-4.19 INFO: rcu detected stall in addrconf_dad_work (2) C done 1 488d 488d 1/1 fixed on 2020/01/19 15:05
linux-4.19 INFO: rcu detected stall in addrconf_dad_work C done 19 580d 591d 1/1 fixed on 2019/12/07 19:18

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 2021/04/02 00:06 upstream 6905b1dc abf9ba4f .config log report syz C
ci-upstream-kasan-gce-root 2021/03/01 07:56 upstream fe07bfda abf9ba4f .config log report syz C
ci-upstream-kasan-gce-root 2021/01/07 16:31 upstream 71c061d2 abf9ba4f .config log report syz C
ci-upstream-kasan-gce-root 2020/12/07 15:58 upstream 0477e928 abf9ba4f .config log report syz C
ci-upstream-kasan-gce-root 2020/11/07 14:04 upstream 659caaf6 abf9ba4f .config log report syz C
ci-upstream-kasan-gce-root 2020/10/08 09:19 upstream c85fb28b abf9ba4f .config log report syz C
Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-root 2020/09/03 15:50 upstream fc3abb53 abf9ba4f .config log report syz C