INFO: task hung in tun_chr

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-5.15	INFO: task hung in tun_chr_close	1				40	288d	531d	0/3	auto-obsoleted due to no activity on 2025/02/09 21:18
linux-4.19	INFO: task hung in tun_chr_close	1				1	1846d	1846d	0/1	auto-closed as invalid on 2020/12/09 18:55
upstream	INFO: task hung in tun_chr_close (5) net	1	syz	done		606	3d13h	349d	0/29	upstream: reported syz repro on 2024/09/15 19:59
upstream	INFO: task hung in tun_chr_close (4) net	1	syz	unreliable	error	14	1387d	1448d	0/29	auto-closed as invalid on 2022/09/18 21:51
upstream	INFO: task hung in tun_chr_close net	1				5	2171d	2753d	0/29	closed as dup on 2018/02/16 08:24
linux-4.19	INFO: task hung in tun_chr_close (3)	1				1	1122d	1122d	0/1	auto-obsoleted due to no activity on 2022/12/03 04:48
linux-6.1	INFO: task hung in tun_chr_close	1				31	400d	467d	0/3	auto-obsoleted due to no activity on 2024/10/04 23:47
upstream	INFO: task hung in rtnetlink_rcv_msg net	1	C	inconclusive	inconclusive	1970	418d	2382d	26/29	fixed on 2024/07/09 19:14
android-49	INFO: task hung in tun_chr_close	1				1	2667d	2667d	0/3	auto-closed as invalid on 2019/02/22 14:33
linux-4.19	INFO: task hung in tun_chr_close (4)	1				3	929d	956d	0/1	upstream: reported on 2023/01/18 07:05
linux-4.19	INFO: task hung in tun_chr_close (2)	1				6	1335d	1429d	0/1	auto-closed as invalid on 2022/05/04 09:03
upstream	INFO: task hung in tun_chr_close (3) net	1				1	1559d	1559d	0/29	auto-closed as invalid on 2021/08/23 13:06
android-44	INFO: task hung in tun_chr_close	1				1	2677d	2677d	0/2	auto-closed as invalid on 2019/02/22 15:23

INFO: task syz-executor.0:16228 blocked for more than 146 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:27304 pid:16228 ppid: 8448 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5216 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x81a/0x1110 kernel/locking/mutex.c:1103 tun_detach drivers/net/tun.c:676 [inline] tun_chr_close+0x3a/0x180 drivers/net/tun.c:3354 __fput+0x283/0x920 fs/file_table.c:280 task_work_run+0xdd/0x190 kernel/task_work.c:140 exit_task_work include/linux/task_work.h:30 [inline] do_exit+0xc5c/0x2ae0 kernel/exit.c:825 do_group_exit+0x125/0x310 kernel/exit.c:922 get_signal+0x427/0x20f0 kernel/signal.c:2773 arch_do_signal_or_restart+0x2a8/0x1eb0 arch/x86/kernel/signal.c:811 handle_signal_work kernel/entry/common.c:147 [inline] exit_to_user_mode_loop kernel/entry/common.c:171 [inline] exit_to_user_mode_prepare+0x148/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:302 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 RSP: 002b:00007fac4732b218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 000000000056bf68 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf68

Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Manager	Title
2021/02/06 01:03	upstream	dd86e7fa07a3	23a562df	.config	console log	report	info	ci-upstream-kasan-gce-root	INFO: task hung in tun_chr_close
2021/01/26 17:28	upstream	13391c60da33	55a7d4df	.config	console log	report	info	ci-upstream-kasan-gce-root	INFO: task hung in tun_chr_close
2020/12/13 20:22	upstream	6bff9bb8a292	b22a7ec3	.config	console log	report	info	ci-upstream-kasan-gce-root
2020/06/29 15:34	upstream	4e99b32169e8	a2cdad9d	.config	console log	report		ci-upstream-kasan-gce-selinux-root
2020/07/06 12:34	upstream	7cc2a8ea1048	51095195	.config	console log	report		ci-upstream-kasan-gce-386
2020/09/27 01:32	net-old	059432495e20	2d5ea0cb	.config	console log	report	info	ci-upstream-net-this-kasan-gce
2020/08/21 20:07	net-old	f6db90964162	6436ce4b	.config	console log	report		ci-upstream-net-this-kasan-gce