INFO: task syz-executor.0:2506 blocked for more than 430 seconds.
      Not tainted 5.16.0-rc1-syzkaller-00003-g8ab774587903 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:    0 pid: 2506 ppid:     1 flags:0x00000009
Call trace:
 __switch_to+0x274/0x3b4 arch/arm64/kernel/process.c:526
 context_switch kernel/sched/core.c:4972 [inline]
 __schedule+0x818/0x1be0 kernel/sched/core.c:6253
 schedule+0xb8/0x224 kernel/sched/core.c:6326
 blk_mq_freeze_queue_wait+0xf4/0x130 block/blk-mq.c:178
 blk_freeze_queue block/blk-mq.c:205 [inline]
 blk_mq_freeze_queue+0x20/0x30 block/blk-mq.c:214
 __loop_clr_fd+0x144/0xa74 drivers/block/loop.c:1122
 lo_release+0x158/0x18c drivers/block/loop.c:1761
 blkdev_put_whole block/bdev.c:694 [inline]
 blkdev_put+0x220/0x714 block/bdev.c:956
 kill_block_super+0x9c/0xf0 fs/super.c:1400
 deactivate_locked_super+0x94/0x154 fs/super.c:335
 deactivate_super+0xa8/0xcc fs/super.c:366
 cleanup_mnt+0x294/0x3ec fs/namespace.c:1137
 __cleanup_mnt+0x14/0x20 fs/namespace.c:1144
 task_work_run+0xd8/0x230 kernel/task_work.c:164
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 do_notify_resume+0x12e8/0x2620 arch/arm64/kernel/signal.c:944
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:134 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:139 [inline]
 el0_svc+0x1d8/0x290 arch/arm64/kernel/entry-common.c:604
 el0t_64_sync_handler+0x1a4/0x1b0 arch/arm64/kernel/entry-common.c:621
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:572

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffff800015ef8f20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x74/0x25c kernel/locking/lockdep.c:6460
1 lock held by syslogd/1981:
1 lock held by klogd/1985:
2 locks held by getty/2146:
 #0: ffff00000bfdd098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x50 drivers/tty/tty_ldsem.c:340
 #1: ffff80001894b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x810/0xbe0 drivers/tty/n_tty.c:2113
2 locks held by syz-executor.0/2506:
 #0: ffff0000107dc918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x84/0x714 block/bdev.c:914
 #1: ffff0000107d8360 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x90/0xa74 drivers/block/loop.c:1106

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