INFO: task hung in dev

INFO: task hung in dev_ethtool (2)

Status: upstream: reported on 2024/05/22 13:33
Reported-by: syzbot+f2ca57d3f55d86459389@syzkaller.appspotmail.com
First crash: 26d, last: 26d

▶ ▼ Similar bugs (2)

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	INFO: task hung in dev_ethtool net				1	932d	932d	0/27	closed as invalid on 2022/02/08 09:40
linux-6.1	INFO: task hung in dev_ethtool				1	128d	128d	0/3	auto-obsoleted due to no activity on 2024/05/21 09:03

Sample crash report:

INFO: task syz-executor.1:10505 blocked for more than 143 seconds.
      Not tainted 6.1.91-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:28704 pid:10505 ppid:7286   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6693
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6b9/0xd80 kernel/locking/mutex.c:747
 dev_ethtool+0x1f4/0x1540 net/ethtool/ioctl.c:3041
 dev_ioctl+0x273/0xf70 net/core/dev_ioctl.c:524

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2024/05/22 13:33	linux-6.1.y	4078fa637fcd	4d098039	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-linux-6-1-kasan	INFO: task hung in dev_ethtool

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