INFO: task syz.4.499:8137 blocked for more than 143 seconds.
      Not tainted 6.15.0-rc6-syzkaller-ga82e92598ab1 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.499       state:D stack:0     pid:8137  tgid:8136  ppid:6516   task_flags:0x400140 flags:0x00000019
Call trace:
 __switch_to+0x414/0x834 arch/arm64/kernel/process.c:735 (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
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6917
 __mutex_lock_common+0xbd0/0x2190 kernel/locking/mutex.c:678
 __mutex_lock kernel/locking/mutex.c:746 [inline]
 mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:798
 bio_find_or_create_slab block/bio.c:122 [inline]
 bioset_init+0x1d0/0x654 block/bio.c:1705
 bch2_fs_alloc fs/bcachefs/super.c:894 [inline]
 bch2_fs_open+0x1884/0x22e8 fs/bcachefs/super.c:2210
 bch2_fs_get_tree+0x384/0xf30 fs/bcachefs/fs.c:2489
 vfs_get_tree+0x90/0x28c fs/super.c:1759
 do_new_mount+0x228/0x814 fs/namespace.c:3881
 path_mount+0x5b4/0xde0 fs/namespace.c:4208
 do_mount fs/namespace.c:4221 [inline]
 __do_sys_mount fs/namespace.c:4432 [inline]
 __se_sys_mount fs/namespace.c:4409 [inline]
 __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4409
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x17c arch/arm64/kernel/entry-common.c:767
 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 kworker/R-kvfre/6:
 #0: ffff80008f3b0ee8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline]
 #0: ffff80008f3b0ee8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3529
3 locks held by kworker/u8:0/12:
1 lock held by kworker/R-mm_pe/13:
 #0: ffff80008f3b0ee8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678
3 locks held by kworker/u8:1/14:
2 locks held by kworker/1:0/24:
1 lock held by khungtaskd/32:
 #0: ffff80008f5088a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330
1 lock held by kworker/R-write/34:
 #0: ffff80008f3b0ee8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678
3 locks held by kworker/u8:2/44:
4 locks held by kworker/u8:3/45:
4 locks held by pr/ttyAMA0/46:
3 locks held by kworker/u8:4/550:
2 locks held by kworker/u8:5/581:
4 locks held by kworker/u8:6/626:
3 locks held by kworker/u8:7/691:
3 locks held by kworker/u8:8/2121:
3 locks held by kworker/u8:9/2220:
1 lock held by klogd/6094:
3 locks held by dhcpcd/6160:
2 locks held by getty/6251:
 #0: ffff0000d2dc20a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80009b4a02f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa0 drivers/tty/n_tty.c:2222
1 lock held by syz-executor/6510:
3 locks held by syz-executor/6514:
2 locks held by syz-executor/6518:
1 lock held by kworker/R-wg-cr/6549:
 #0: ffff80008f3b0ee8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline]
 #0: ffff80008f3b0ee8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3529
1 lock held by kworker/R-wg-cr/6552:
1 lock held by kworker/R-wg-cr/6553:
 #0: ffff80008f3b0ee8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline]
 #0: ffff80008f3b0ee8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3529
1 lock held by kworker/R-wg-cr/6554:
 #0: ffff80008f3b0ee8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_detach_from_pool kernel/workqueue.c:2736 [inline]
 #0: ffff80008f3b0ee8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: rescuer_thread+0x86c/0xec8 kernel/workqueue.c:3529
2 locks held by kworker/1:3/6555:
2 locks held by udevd/6618:
3 locks held by udevd/6619:
3 locks held by kworker/u8:10/6753:
3 locks held by kworker/u8:11/6925:
2 locks held by udevd/7688:
3 locks held by udevd/7689:
2 locks held by udevd/7692:
1 lock held by syz.4.499/8137:
 #0: ffff80008fc23aa8 (bio_slab_lock){+.+.}-{4:4}, at: bio_find_or_create_slab block/bio.c:122 [inline]
 #0: ffff80008fc23aa8 (bio_slab_lock){+.+.}-{4:4}, at: bioset_init+0x1d0/0x654 block/bio.c:1705
4 locks held by syz.1.506/8165:
2 locks held by kworker/u8:12/8187:
3 locks held by kworker/u8:13/8188:
1 lock held by kworker/u8:14/8190:
 #0: ffff80008f3b0ee8 (wq_pool_attach_mutex){+.+.}-{4:4}, at: worker_attach_to_pool+0x40/0x348 kernel/workqueue.c:2678
3 locks held by syz-executor/8193:

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