INFO: task syz-executor:6497 blocked for more than 143 seconds.
      Not tainted 6.15.0-rc5-syzkaller-gc32f8dc5aaf9 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:0     pid:6497  tgid:6497  ppid:1      task_flags:0x400140 flags:0x00000019
task:syz-executor    state:D stack:0     pid:6497  tgid:6497  ppid:1      task_flags:0x400140 flags:0x00000019
Call trace:
 __switch_to+0x414/0x834 arch/arm64/kernel/process.c:734 (T)
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x13b0/0x28d4 kernel/sched/core.c:6767
 __schedule_loop kernel/sched/core.c:6845 [inline]
 schedule+0xb4/0x230 kernel/sched/core.c:6860
 __bch2_fs_stop+0x378/0x564 fs/bcachefs/super.c:636
 bch2_put_super+0x40/0x50 fs/bcachefs/fs.c:2382
 generic_shutdown_super+0x12c/0x2b8 fs/super.c:642
 bch2_kill_sb+0x40/0x58 fs/bcachefs/fs.c:2625
 deactivate_locked_super+0xc4/0x12c fs/super.c:473
 deactivate_super+0xe0/0x100 fs/super.c:506
 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1435
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1442
 task_work_run+0x1dc/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 do_notify_resume+0x16c/0x1ec arch/arm64/kernel/entry-common.c:151
 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline]
 el0_svc+0xb4/0x17c arch/arm64/kernel/entry-common.c:768
 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:786
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

Showing all locks held in the system:
1 lock held by khungtaskd/32:
 #0: ffff80008f4f88a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330
2 locks held by pr/ttyAMA0/46:
2 locks held by kworker/u8:7/258:
2 locks held by kworker/u8:8/285:
 #0: ffff0000c4bfd148 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212
 #1: ffff80009bcc7bc0 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212
2 locks held by udevd/6110:
2 locks held by getty/6263:
 #0: ffff0000d251e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80009b5db2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa0 drivers/tty/n_tty.c:2222
1 lock held by syz-executor/6497:
 #0: ffff0000f36f40e0 (&type->s_umount_key#83){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
 #0: ffff0000f36f40e0 (&type->s_umount_key#83){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
 #0: ffff0000f36f40e0 (&type->s_umount_key#83){++++}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:505
2 locks held by syz-executor/6504:
1 lock held by udevd/6626:
1 lock held by udevd/6627:
1 lock held by syz.1.340/8828:
 #0: ffff0000f36f40e0 (&type->s_umount_key#83){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff0000f36f40e0 (&type->s_umount_key#83){++++}-{4:4}, at: super_lock+0x240/0x32c fs/super.c:120
1 lock held by syz.5.345/8842:
 #0: ffff0000f36f40e0 (&type->s_umount_key#83){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff0000f36f40e0 (&type->s_umount_key#83){++++}-{4:4}, at: super_lock+0x240/0x32c fs/super.c:120
1 lock held by syz.4.678/10740:
1 lock held by syz.6.691/10769:

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