INFO: task syz-executor:6533 blocked for more than 144 seconds.
      Not tainted 6.16.0-rc6-syzkaller-gaaef6f251176 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:0     pid:6533  tgid:6533  ppid:1      task_flags:0x400140 flags:0x00000011
Call trace:
 __switch_to+0x414/0x834 arch/arm64/kernel/process.c:741 (T)
 context_switch kernel/sched/core.c:5397 [inline]
 __schedule+0x1414/0x2a28 kernel/sched/core.c:6786
 __schedule_loop kernel/sched/core.c:6864 [inline]
 schedule+0xb4/0x230 kernel/sched/core.c:6879
 schedule_timeout+0xac/0x270 kernel/time/sleep_timeout.c:75
 do_wait_for_common+0x288/0x3f8 kernel/sched/completion.c:95
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common kernel/sched/completion.c:127 [inline]
 wait_for_completion+0x44/0x5c kernel/sched/completion.c:148
 kthread_stop+0x1bc/0x68c kernel/kthread.c:791
 bch2_copygc_stop+0x54/0xa4 fs/bcachefs/movinggc.c:438
 __bch2_fs_read_only+0x64/0x4dc fs/bcachefs/super.c:280
 bch2_fs_read_only+0x344/0x960 fs/bcachefs/super.c:366
 __bch2_fs_stop+0x104/0x800 fs/bcachefs/super.c:677
 bch2_put_super+0x40/0x50 fs/bcachefs/fs.c:2365
 generic_shutdown_super+0x12c/0x2b8 fs/super.c:643
 bch2_kill_sb+0x40/0x58 fs/bcachefs/fs.c:2618
 deactivate_locked_super+0xc4/0x12c fs/super.c:474
 deactivate_super+0xe0/0x100 fs/super.c:507
 cleanup_mnt+0x31c/0x3ac fs/namespace.c:1417
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1424
 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+0x174/0x1f4 arch/arm64/kernel/entry-common.c:155
 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:173 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:182 [inline]
 el0_svc+0xb8/0x180 arch/arm64/kernel/entry-common.c:880
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596

Showing all locks held in the system:
1 lock held by khungtaskd/32:
 #0: ffff80008f869980 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330
2 locks held by kworker/u8:3/42:
3 locks held by kworker/u8:5/294:
 #0: ffff0000c0031148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3212
 #1: ffff80009bfb7bc0 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3212
 #2: ffff8000928c78e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80
1 lock held by udevd/6141:
2 locks held by getty/6290:
 #0: ffff0000cc97b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff80009ba3e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222
2 locks held by syz-executor/6533:
 #0: ffff0000d84460e0 (&type->s_umount_key#80){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
 #0: ffff0000d84460e0 (&type->s_umount_key#80){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
 #0: ffff0000d84460e0 (&type->s_umount_key#80){++++}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506
 #1: ffff0000f7c00278 (&c->state_lock){++++}-{4:4}, at: __bch2_fs_stop+0xfc/0x800 fs/bcachefs/super.c:676
2 locks held by bch-copygc/loop/8209:
 #0: ffff0000f7c04398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:160
 #1: ffff0000f7c26710 (&c->gc_lock){++++}-{4:4}, at: bch2_btree_update_start+0x468/0x1ab8 fs/bcachefs/btree_update_interior.c:1211
1 lock held by syz-executor/8537:
1 lock held by syz.6.1166/11014:

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