INFO: task syz-executor.1:24520 blocked for more than 430 seconds.
      Not tainted 5.16.0-rc1-syzkaller-00313-ga90af8f15bdc #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:    0 pid:24520 ppid:  2189 flags:0x00400009
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
 del_gendisk+0x418/0x680 block/genhd.c:623
 loop_remove+0x38/0xf0 drivers/block/loop.c:2080
 loop_control_remove drivers/block/loop.c:2137 [inline]
 loop_control_ioctl+0x338/0x3bc drivers/block/loop.c:2175
 __do_compat_sys_ioctl fs/ioctl.c:972 [inline]
 __se_compat_sys_ioctl fs/ioctl.c:914 [inline]
 __arm64_compat_sys_ioctl+0x1d0/0x220 fs/ioctl.c:914
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x6c/0x260 arch/arm64/kernel/syscall.c:52
 el0_svc_common.constprop.0+0xc4/0x254 arch/arm64/kernel/syscall.c:142
 do_el0_svc_compat+0x40/0x80 arch/arm64/kernel/syscall.c:187
 el0_svc_compat+0x64/0x290 arch/arm64/kernel/entry-common.c:736
 el0t_32_sync_handler+0x90/0x140 arch/arm64/kernel/entry-common.c:746
 el0t_32_sync+0x1a4/0x1a8 arch/arm64/kernel/entry.S:577

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffff800015e18f20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x74/0x25c kernel/locking/lockdep.c:6460
1 lock held by klogd/1984:
2 locks held by getty/2144:
 #0: ffff000009527098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x50 drivers/tty/tty_ldsem.c:340
 #1: ffff80001886b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x810/0xbe0 drivers/tty/n_tty.c:2113

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