INFO: task hung in nsim_drv

INFO: task hung in nsim_drv_remove

Status: upstream: reported C repro on 2026/01/25 11:38
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+729ec771091615685175@syzkaller.appspotmail.com
First crash: 8d11h, last: 8d11h

▶ ▼ Bug presence (1)

Date	Name	Commit	Repro	Result
2026/01/25	upstream (ToT)	63804fed149a	C	[report] INFO: task hung in corrupted

▶ ▼ Similar bugs (2)

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	INFO: task hung in nsim_drv_remove (2) net	1				2	546d	604d	0/29	auto-obsoleted due to no activity on 2024/11/03 12:36
upstream	INFO: task hung in nsim_drv_remove net	1				1	839d	839d	0/29	auto-obsoleted due to no activity on 2024/01/15 19:32

Sample crash report:

INFO: task syz-executor:5906 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:22248 pid:5906  ppid:1      flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5381 [inline]
 __schedule+0x1553/0x45a0 kernel/sched/core.c:6700
 schedule+0xbd/0x170 kernel/sched/core.c:6774
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6833
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6a9/0xcc0 kernel/locking/mutex.c:747
 nsim_drv_remove+0x50/0x160 drivers/net/netdevsim/dev.c:1675
 device_remove drivers/base/dd.c:567 [inline]
 __device_release_driver drivers/base/dd.c:1272 [inline]
 device_release_driver_internal+0x468/0x7a0 drivers/base/dd.c:1295
 bus_remove_device+0x342/0x400 drivers/base/bus.c:576
 device_del+0x522/0x910 drivers/base/core.c:3872

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/01/25 11:37	linux-6.6.y	cbb31f77b879	40acda8a	.config	console log	report	syz / log	C		[disk image] [vmlinux] [kernel image]	ci2-linux-6-6-kasan-perf	INFO: task hung in nsim_drv_remove

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