syzbot


INFO: rcu detected stall in sys_open (3)
Status: upstream: reported C repro on 2021/05/17 10:12
Reported-by: syzbot+722e26bca192a00fe8ee@syzkaller.appspotmail.com
First crash: 199d, last: 55d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: INFO: rcu detected stall in generic_file_read_iter (log)
Repro: C syz .config
similar bugs (3):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in sys_open 1 891d 891d 0/22 auto-closed as invalid on 2019/10/25 09:11
linux-4.19 INFO: rcu detected stall in sys_open 1 777d 777d 0/1 auto-closed as invalid on 2020/01/09 20:01
upstream INFO: rcu detected stall in sys_open (2) C done done 42 352d 702d 17/22 fixed on 2020/12/23 11:40

Sample crash report:

Crashes (3):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-linux-next-kasan-gce-root 2021/04/11 16:34 linux-next e99d8a849517 bfeda1b1 .config log report syz C INFO: rcu detected stall in sys_open
ci-upstream-kasan-gce-selinux-root 2021/08/13 00:25 upstream f8fbb47c6e86 3fd2ea69 .config log report info INFO: rcu detected stall in sys_open
ci-upstream-kasan-gce-selinux-root 2021/09/02 21:31 upstream 4ac6d90867a4 15cea0a3 .config log report info BUG: soft lockup in sys_open