INFO: task syz-executor.0:6960 blocked for more than 143 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:6960  tgid:6959  ppid:6761   task_flags:0x400140 flags:0x00000011
Call trace:
 __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T)
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x1250/0x2a7c kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0xb4/0x230 kernel/sched/core.c:6960
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7017
 __mutex_lock_common+0xd04/0x2678 kernel/locking/mutex.c:692
 __mutex_lock kernel/locking/mutex.c:776 [inline]
 mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:828
 bdev_release+0x154/0x654 block/bdev.c:1145
 blkdev_release+0x20/0x34 block/fops.c:706
 __fput+0x340/0x75c fs/file_table.c:468
 ____fput+0x20/0x58 fs/file_table.c:496
 task_work_run+0x1dc/0x260 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:44 [inline]
 exit_to_user_mode_loop+0x10c/0x18c kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 exit_to_user_mode_prepare_legacy include/linux/irq-entry-common.h:242 [inline]
 arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:81 [inline]
 el0_svc+0x17c/0x26c arch/arm64/kernel/entry-common.c:725
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
 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: ffff80008fa5b520 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330
1 lock held by pr/ttyAMA-1/43:
1 lock held by klogd/6199:
2 locks held by getty/6354:
 #0: ffff0000daa620a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff800099f1e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfc8 drivers/tty/n_tty.c:2211
1 lock held by udevd/6764:
 #0: ffff0000cb5b9358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xcc/0xc20 block/bdev.c:962
1 lock held by syz-executor.0/6960:
 #0: ffff0000cb5b9358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x154/0x654 block/bdev.c:1145
1 lock held by syz-executor.0/6986:
 #0: ffff0000cb5b9358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xcc/0xc20 block/bdev.c:962
1 lock held by syz-executor.0/7014:
 #0: ffff0000cb5b9358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xcc/0xc20 block/bdev.c:962

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