syzbot


INFO: rcu detected stall in wg_packet_tx_worker (3)
Status: fixed on 2021/11/10 00:50
Reported-by: syzbot+@syzkaller.appspotmail.com
Fix commit: c7c5e6ff533f fq_codel: reject silly quantum parameters
First crash: 240d, last: 156d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: BUG: soft lockup in addrconf_dad_work (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 wg_packet_tx_worker C done 24 580d 633d 17/22 fixed on 2020/07/17 17:58
upstream INFO: rcu detected stall in wg_packet_tx_worker (2) 4 435d 530d 0/22 auto-closed as invalid on 2021/02/08 20:10
upstream BUG: soft lockup in wg_packet_tx_worker 1 623d 623d 17/22 fixed on 2020/07/17 17:58

Sample crash report:

Crashes (5):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-net-this-kasan-gce 2021/08/01 11:37 net c7d102232649 6c236867 .config log report syz C BUG: soft lockup in wg_packet_tx_worker
ci-upstream-net-this-kasan-gce 2021/08/16 06:11 net 5f7735196390 2489ab88 .config log report info INFO: rcu detected stall in wg_packet_tx_worker
ci-upstream-net-this-kasan-gce 2021/05/30 06:42 net 6850ec973791 325a8dab .config log report info INFO: rcu detected stall in wg_packet_tx_worker
ci-upstream-net-kasan-gce 2021/08/08 19:22 net-next 82564f6c706a 6972b106 .config log report info INFO: rcu detected stall in wg_packet_tx_worker
ci-upstream-net-kasan-gce 2021/05/25 01:51 net-next ec7d6dd870d4 3c7fef33 .config log report info INFO: rcu detected stall in wg_packet_tx_worker