INFO: task hung in unregister

Kernel	Title	Repro	Fix bisect	Count	Last	Reported	Patched	Status
linux-5.15	INFO: task hung in unregister_shrinker origin:lts-only	C	done	12	231d	391d	0/3	upstream: reported C repro on 2023/04/13 04:43
upstream	INFO: task hung in unregister_shrinker (2) mm			1	1304d	1304d	0/26	auto-closed as invalid on 2021/01/10 07:07
upstream	INFO: task hung in unregister_shrinker mm			1	1465d	1465d	0/26	auto-closed as invalid on 2020/08/02 17:45
linux-4.19	INFO: task hung in unregister_shrinker xfs	C	error	1	479d	479d	0/1	upstream: reported C repro on 2023/01/15 08:29

INFO: task kworker/1:1:20241 blocked for more than 143 seconds. Not tainted 5.16.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:1 state:D stack:28432 pid:20241 ppid: 2 flags:0x00004000 Workqueue: events free_ipc Call Trace: <TASK> context_switch kernel/sched/core.c:4972 [inline] __schedule+0xa9a/0x4940 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 rwsem_down_write_slowpath+0x634/0x1110 kernel/locking/rwsem.c:1151 __down_write_common kernel/locking/rwsem.c:1268 [inline] __down_write_common kernel/locking/rwsem.c:1265 [inline] __down_write kernel/locking/rwsem.c:1277 [inline] down_write+0x135/0x150 kernel/locking/rwsem.c:1524 unregister_shrinker mm/vmscan.c:678 [inline] unregister_shrinker+0x77/0x2f0 mm/vmscan.c:673 deactivate_locked_super+0x6c/0x160 fs/super.c:334 deactivate_super+0xad/0xd0 fs/super.c:366 cleanup_mnt+0x3a2/0x540 fs/namespace.c:1137 mntput_no_expire+0x908/0xcd0 fs/namespace.c:1223 mntput fs/namespace.c:1233 [inline] kern_unmount fs/namespace.c:4369 [inline] kern_unmount+0xb5/0xe0 fs/namespace.c:4363 free_ipc_ns ipc/namespace.c:123 [inline] free_ipc+0xf0/0x200 ipc/namespace.c:141 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298

Crashes (4):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Manager	Title
2021/12/05 01:49	upstream	bbef3c7a63d2	a617004c	.config	console log	report	info	ci-upstream-kasan-gce-386	INFO: task hung in unregister_shrinker
2021/11/15 02:42	net-old	1aa3b2207e88	83f5c9b5	.config	console log	report	info	ci-upstream-net-this-kasan-gce	INFO: task hung in unregister_shrinker
2021/08/11 21:40	net-old	519133debcc1	6972b106	.config	console log	report	info	ci-upstream-net-this-kasan-gce	INFO: task hung in unregister_shrinker
2021/10/02 18:39	net-next-old	b8aa16541d73	db0f5787	.config	console log	report	info	ci-upstream-net-kasan-gce	INFO: task hung in unregister_shrinker

Crashes (4):