syzbot


INFO: rcu detected stall in sys_exit_group
Status: fixed on 2019/10/09 10:54
Reported-by: syzbot+18379f2a19bc62c12565@syzkaller.appspotmail.com
Fix commit: d4d6ec6dac07 sch_hhf: ensure quantum and hhf_non_hh_weight are non-zero
First crash: 744d, last: 744d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: INFO: rcu detected stall in arch_cpu_idle (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 sys_exit_group (6) C 4 362d 368d 21/22 fixed on 2021/03/10 01:48
upstream INFO: rcu detected stall in sys_exit_group (2) 56 663d 665d 0/22 closed as invalid on 2019/12/04 14:14
upstream INFO: rcu detected stall in sys_exit_group (3) 8 628d 629d 0/22 closed as invalid on 2020/01/08 05:23
upstream INFO: rcu detected stall in sys_exit_group (4) 13 628d 628d 0/22 closed as invalid on 2020/01/09 08:13
upstream INFO: rcu detected stall in sys_exit_group (5) 1 549d 549d 0/22 auto-closed as invalid on 2020/06/25 07:58

Sample crash report:

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2019/09/14 09:26 upstream a7f89616b737 32d59357 .config log report syz C