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	606d	848d	0/3	auto-obsoleted due to no activity on 2025/02/09 21:18
linux-6.6	INFO: task hung in tun_chr_close origin:lts-only	1	C		error	1	67d	67d	0/2	upstream: reported C repro on 2026/05/09 00:17
upstream	INFO: task hung in tun_chr_close (5) net prio:high	1	C	done		689	9d09h	667d	0/29	upstream: reported C repro on 2024/09/15 19:59
upstream	INFO: task hung in tun_chr_close (4) net	1	syz	unreliable	error	14	1704d	1765d	0/29	auto-closed as invalid on 2022/09/18 21:51
upstream	INFO: task hung in tun_chr_close net	1				5	2489d	3070d	0/29	closed as dup on 2018/02/16 08:24
linux-4.19	INFO: task hung in tun_chr_close (3)	1				1	1440d	1440d	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	718d	785d	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	736d	2699d	26/29	fixed on 2024/07/09 19:14
android-49	INFO: task hung in tun_chr_close	1				1	2985d	2985d	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	1246d	1274d	0/1	upstream: reported on 2023/01/18 07:05
linux-4.19	INFO: task hung in tun_chr_close (2)	1				6	1652d	1746d	0/1	auto-closed as invalid on 2022/05/04 09:03
linux-6.1	INFO: task hung in tun_chr_close (2)	1				1	196d	196d	0/3	auto-obsoleted due to no activity on 2026/04/09 21:13
upstream	INFO: task hung in tun_chr_close (3) net	1				1	1876d	1876d	0/29	auto-closed as invalid on 2021/08/23 13:06
android-44	INFO: task hung in tun_chr_close	1				1	2994d	2994d	0/2	auto-closed as invalid on 2019/02/22 15:23
upstream	INFO: task hung in tun_chr_close (2) net	1				7	1985d	2206d	0/29	auto-closed as invalid on 2021/05/17 11:47

request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module nf-nat-0, throttling... request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module nf-nat-0, throttling... request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module nf-nat-0, throttling... request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module nf-nat-0, throttling... INFO: task syz-executor.1:3421 blocked for more than 140 seconds. Not tainted 4.19.139-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D26064 3421 6586 0x80000002 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3619 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x647/0x1260 kernel/locking/mutex.c:1072 tun_detach drivers/net/tun.c:751 [inline] tun_chr_close+0x3a/0x180 drivers/net/tun.c:3267 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xbb2/0x2b70 kernel/exit.c:887 do_group_exit+0x125/0x310 kernel/exit.c:990 get_signal+0x3f2/0x1f70 kernel/signal.c:2588 do_signal+0x8f/0x1670 arch/x86/kernel/signal.c:821 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45ce69 Code: Bad RIP value. RSP: 002b:00007fd2d7682c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: 0000000000000080 RBX: 0000000000028580 RCX: 000000000045ce69 RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000005 RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c R13: 00007ffd0714fb9f R14: 00007fd2d76839c0 R15: 000000000118bf2c INFO: task kworker/0:1:13693 blocked for more than 140 seconds. Not tainted 4.19.139-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:1 D29632 13693 2 0x80000000 Workqueue: ipv6_addrconf addrconf_verify_work Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561