INFO: task syz-executor:4043 blocked for more than 143 seconds.
      Not tainted 5.15.167-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:    0 pid: 4043 ppid:     1 flags:0x00000009
Call trace:
 __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5027 [inline]
 __schedule+0xf10/0x1e48 kernel/sched/core.c:6373
 schedule+0x11c/0x1c8 kernel/sched/core.c:6456
 schedule_timeout+0xb8/0x344 kernel/time/timer.c:1890
 do_wait_for_common+0x214/0x388 kernel/sched/completion.c:85
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x4c/0x64 kernel/sched/completion.c:138
 kthread_stop+0x1a0/0x788 kernel/kthread.c:664
 ext4_stop_mmpd+0x48/0xb4 fs/ext4/mmp.c:263
 ext4_put_super+0xa04/0xed4 fs/ext4/super.c:1266
 generic_shutdown_super+0x130/0x29c fs/super.c:475
 kill_block_super+0x70/0xdc fs/super.c:1425
 deactivate_locked_super+0xb8/0x13c fs/super.c:335
 deactivate_super+0x108/0x128 fs/super.c:366
 cleanup_mnt+0x3c0/0x474 fs/namespace.c:1143
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1150
 task_work_run+0x130/0x1e4 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 do_notify_resume+0x262c/0x32b8 arch/arm64/kernel/signal.c:946
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:609
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
INFO: task kmmpd-loop4:4978 blocked for more than 143 seconds.
      Not tainted 5.15.167-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kmmpd-loop4     state:D stack:    0 pid: 4978 ppid:     2 flags:0x00000008
Call trace:
 __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5027 [inline]
 __schedule+0xf10/0x1e48 kernel/sched/core.c:6373
 schedule+0x11c/0x1c8 kernel/sched/core.c:6456
 percpu_rwsem_wait+0x288/0x3cc kernel/locking/percpu-rwsem.c:160
 __percpu_down_read+0x70/0x98 kernel/locking/percpu-rwsem.c:174
 percpu_down_read include/linux/percpu-rwsem.h:65 [inline]
 __sb_start_write include/linux/fs.h:1811 [inline]
 sb_start_write include/linux/fs.h:1881 [inline]
 write_mmp_block+0x57c/0x894 fs/ext4/mmp.c:66
 kmmpd+0x72c/0xa30 fs/ext4/mmp.c:248
 kthread+0x37c/0x45c kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffff800014c917e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:311
3 locks held by kworker/0:3/1534:
 #0: ffff0000c0020938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283
 #1: ffff800023b27c00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285
 #2: ffff0000f0086240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x274/0x33c4 drivers/net/netdevsim/fib.c:1478
2 locks held by getty/3787:
 #0: ffff0000d4844098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340
 #1: ffff80001d5fe2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1204 drivers/tty/n_tty.c:2158
3 locks held by kworker/u5:2/4037:
 #0: ffff0000ca0e1138 ((wq_completion)hci6){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283
 #1: ffff80001f9f7c00 ((work_completion)(&hdev->power_on)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285
 #2: ffff0000d4bbcff0 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_open+0xb8/0x104c net/bluetooth/hci_core.c:1446
1 lock held by syz-executor/4043:
 #0: ffff0000dd2a60e0 (&type->s_umount_key#30){++++}-{3:3}, at: deactivate_super+0x100/0x128 fs/super.c:365
2 locks held by kworker/u4:11/4398:
1 lock held by kmmpd-loop4/4978:
 #0: ffff0000dd2a6460 (sb_writers#3){++++}-{0:0}, at: kmmpd+0x72c/0xa30 fs/ext4/mmp.c:248
2 locks held by syz-executor/5249:
 #0: ffff0000cbb7a918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xe0/0x6b0 block/bdev.c:912
 #1: ffff0000cbb69468 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0xa8/0x9b8 drivers/block/loop.c:1365
1 lock held by syz.4.580/6381:
 #0: ffff0000d4ad8098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_write+0x40/0x50 drivers/tty/tty_ldsem.c:366
1 lock held by syz.2.584/6400:

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