INFO: task hung in _free

INFO: task hung in _free_event

Status: auto-closed as invalid on 2020/09/05 20:32
Reported-by: syzbot+95047c9c4bbd784efdd4@syzkaller.appspotmail.com
First crash: 1446d, last: 1446d

▶ ▼ Similar bugs (2)

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
android-414	INFO: task hung in _free_event				8	1762d	1829d	0/1	auto-closed as invalid on 2019/10/26 01:49
linux-4.14	INFO: task hung in _free_event				1	1320d	1320d	0/1	auto-closed as invalid on 2021/01/10 07:54

Sample crash report:

FAT-fs (loop4): error, fat_free_clusters: deleting FAT entry beyond EOF
FAT-fs (loop4): Filesystem has been set read-only
INFO: task syz-executor.5:12588 blocked for more than 140 seconds.
      Not tainted 4.19.121-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5  D28232 12588   6911 0x80000002
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3559
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3617
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072
 perf_trace_destroy+0x23/0xf0 kernel/trace/trace_event_perf.c:236
 _free_event+0x33b/0x1170 kernel/events/core.c:4454

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2020/05/08 20:31	linux-4.19.y	84920cc7fbe1	fe4122c3	.config	console log	report					ci2-linux-4-19

* ~~Struck through~~ repros no longer work on HEAD.