INFO: task syz-executor.0:3622 blocked for more than 430 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:0     pid:3622  tgid:3619  ppid:3505   task_flags:0x400140 flags:0x00000019
Call trace:
 __switch_to+0x208/0x4ec arch/arm64/kernel/process.c:741 (T)
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0xd58/0x3180 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0xd0/0x344 kernel/sched/core.c:7058
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7115
 __mutex_lock_common kernel/locking/mutex.c:676 [inline]
 __mutex_lock+0x72c/0xffc kernel/locking/mutex.c:760
 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:812
 bdev_release+0x104/0x510 block/bdev.c:1128
 blkdev_release+0x14/0x24 block/fops.c:702
 __fput+0x2c8/0x954 fs/file_table.c:468
 ____fput+0x14/0x20 fs/file_table.c:496
 task_work_run+0x128/0x210 kernel/task_work.c:227
 get_signal+0x174/0x1bac kernel/signal.c:2807
 do_signal+0x1f4/0x6a8 arch/arm64/kernel/signal.c:1618
 do_notify_resume+0x194/0x260 arch/arm64/kernel/entry-common.c:152
 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:173 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:182 [inline]
 el0_svc+0x120/0x1a0 arch/arm64/kernel/entry-common.c:880
 el0t_64_sync_handler+0xa0/0xe4 arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

Showing all locks held in the system:
1 lock held by khungtaskd/32:
 #0: ffff800087320220 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x18/0x1c4 kernel/locking/lockdep.c:6769
1 lock held by klogd/3121:
2 locks held by getty/3257:
 #0: ffff0000184160a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80008d5fb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x3e8/0xdc0 drivers/tty/n_tty.c:2222
1 lock held by syz-executor.0/3622:
 #0: ffff000014b9b358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x104/0x510 block/bdev.c:1128
1 lock held by udevd/3624:
 #0: ffff000014b9b358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0x2c4/0xa84 block/bdev.c:945
1 lock held by syz-executor.0/3729:
 #0: ffff000014b9b358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0x2c4/0xa84 block/bdev.c:945
1 lock held by syz-executor.0/3807:
 #0: ffff000014b9b358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0x2c4/0xa84 block/bdev.c:945

=============================================