syzbot


INFO: rcu detected stall in br_handle_frame (2)
Status: fixed on 2020/02/18 14:31
Reported-by: syzbot+dc9071cc5a85950bdfce@syzkaller.appspotmail.com
Fix commit: d9e15a273306 pkt_sched: fq: do not accept silly TCA_FQ_QUANTUM
First crash: 637d, last: 637d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: INFO: rcu detected stall in corrupted (log)
Repro: C syz .config
similar bugs (6):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 INFO: rcu detected stall in br_handle_frame (3) 1 352d 352d 0/1 auto-closed as invalid on 2021/01/28 07:46
upstream INFO: rcu detected stall in br_handle_frame C done 341 732d 738d 14/22 fixed on 2019/10/09 10:54
linux-4.14 INFO: rcu detected stall in br_handle_frame (2) C done 1 637d 637d 1/1 fixed on 2020/01/19 15:05
linux-4.14 INFO: rcu detected stall in br_handle_frame C done 15 730d 741d 1/1 fixed on 2019/12/07 19:24
linux-4.19 INFO: rcu detected stall in br_handle_frame (2) C 8 2d13h 338d 0/1 upstream: reported C repro on 2020/10/14 18:56
linux-4.19 INFO: rcu detected stall in br_handle_frame C done 41 729d 742d 1/1 fixed on 2019/12/07 19:18

Sample crash report:

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2019/12/20 14:55 upstream 7e0165b2f1a9 e30cbdae .config log report syz C
ci-upstream-kasan-gce 2019/12/20 13:44 upstream 7e0165b2f1a9 e30cbdae .config log report syz C