INFO: task hung in __fdget

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-6.1	INFO: task hung in __fdget_pos (3) origin:lts-only	1	syz, C		done	1	577d	580d	3/3	fixed on 2025/02/05 14:14
linux-5.15	INFO: task hung in __fdget_pos (4) origin:lts-only	1	syz, C		done	1	61d	428d	0/3	upstream: reported C repro on 2025/05/31 22:18
linux-6.1	INFO: task hung in __fdget_pos (2)	1				5	687d	721d	0/3	auto-obsoleted due to no activity on 2024/12/23 19:37
upstream	INFO: task hung in __fdget_pos kernfs	1				1	3051d	3051d	0/29	closed as invalid on 2018/03/27 11:08
android-44	INFO: task hung in __fdget_pos	1				2	2872d	2884d	0/2	auto-closed as invalid on 2019/03/21 05:21
linux-6.6	INFO: task hung in __fdget_pos	1				2	6d07h	6d07h	0/2	upstream: reported on 2026/07/27 22:55
linux-6.1	INFO: task hung in __fdget_pos	1				1	1029d	1029d	0/3	auto-obsoleted due to no activity on 2024/01/16 13:13
android-49	INFO: task hung in __fdget_pos	1				22	2873d	3003d	0/3	auto-closed as invalid on 2019/03/20 03:41
upstream	INFO: task hung in __fdget_pos (4) fs	1	syz, C	error	done	297	671d	1065d	0/29	auto-obsoleted due to no activity on 2025/07/22 08:19
upstream	INFO: task hung in __fdget_pos (3) fs	1				3	1758d	1776d	0/29	auto-closed as invalid on 2022/01/07 10:38
linux-5.15	INFO: task hung in __fdget_pos (2)	1				2	828d	840d	0/3	auto-obsoleted due to no activity on 2024/08/04 06:39
linux-5.15	INFO: task hung in __fdget_pos	1				1	1220d	1220d	0/3	auto-obsoleted due to no activity on 2023/07/29 10:54
upstream	INFO: task hung in __fdget_pos (2) fs	1				36	2764d	2988d	0/29	closed as dup on 2018/10/27 13:29
linux-5.15	INFO: task hung in __fdget_pos (3)	1				50	633d	721d	0/3	auto-obsoleted due to no activity on 2025/01/16 10:32
linux-6.1	INFO: task hung in __fdget_pos (4) origin:lts-only	1	syz, C		inconclusive	7	52d	306d	0/3	upstream: reported C repro on 2025/09/30 10:05

INFO: task syz-executor0:10958 blocked for more than 140 seconds. Not tainted 4.14.96+ #20 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D28024 10958 5605 0x00000004 Call Trace: schedule+0x92/0x1c0 kernel/sched/core.c:3490 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3548 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0x559/0x1430 kernel/locking/mutex.c:893 __fdget_pos+0xa6/0xc0 fs/file.c:768 fdget_pos include/linux/file.h:67 [inline] SYSC_write fs/read_write.c:588 [inline] SyS_write+0x72/0x1a0 fs/read_write.c:585 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [<ffffffffa8dffeec>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541 2 locks held by getty/1757: #0: (&tty->ldisc_sem){++++}, at: [<ffffffffa9936f02>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:275 #1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffffa9932327>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156 1 lock held by syz-executor0/10958: #0: (&f->f_pos_lock){+.+.}, at: [<ffffffffa91b9966>] __fdget_pos+0xa6/0xc0 fs/file.c:768 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.96+ #20 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x10e lib/dump_stack.c:53 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at pc 0xffffffffaa450692