syzbot


INFO: task can't die in perf_event_free_task
Status: upstream: reported syz repro on 2020/11/19 15:42
Reported-by: syzbot+f02b92479b7065807a2a@syzkaller.appspotmail.com
First crash: 250d, last: 2d18h

Cause bisection: introduced by (bisect log) [no-op commit]:
commit ab2dd173330a3f07142e68cd65682205036cd00f
Author: Andy Lutomirski <luto@kernel.org>
Date: Wed Aug 26 17:00:45 2020 +0000

  selftests/x86/fsgsbase: Reap a forgotten child

Crash: INFO: task hung in perf_event_free_task (log)
Repro: syz .config
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in perf_event_free_task (2) 2 73d 145d 0/1 upstream: reported on 2021/03/01 08:21
upstream INFO: task hung in perf_event_free_task C done error 31 17d 730d 0/22 upstream: reported C repro on 2019/07/24 19:18

Sample crash report:

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-linux-next-kasan-gce-root 2020/11/15 15:35 linux-next 92edc4aef867 1bf9a662 .config log report syz
ci-upstream-linux-next-kasan-gce-root 2021/07/21 16:58 linux-next b1347210b01d 29c3f20f .config log report info INFO: task can't die in perf_event_free_task