INFO: task syz-executor.3:6273 blocked for more than 143 seconds.
      Not tainted 6.9.0-rc7-syzkaller-gfda5695d692c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:0     pid:6273  tgid:6273  ppid:1      flags:0x0000000d
Call trace:
 __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0x14b8/0x24e8 kernel/sched/core.c:6746
 __schedule_loop kernel/sched/core.c:6823 [inline]
 schedule+0xbc/0x238 kernel/sched/core.c:6838
 schedule_timeout+0xb8/0x348 kernel/time/timer.c:2558
 do_wait_for_common+0x30c/0x468 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+0x48/0x60 kernel/sched/completion.c:148
 kthread_stop+0x1cc/0x75c kernel/kthread.c:709
 bch2_copygc_stop+0x54/0xa4 fs/bcachefs/movinggc.c:397
 __bch2_fs_read_only+0x5c/0x3d8 fs/bcachefs/super.c:266
 bch2_fs_read_only+0x8f8/0xed4 fs/bcachefs/super.c:357
 __bch2_fs_stop+0x10c/0x51c fs/bcachefs/super.c:622
 bch2_put_super+0x40/0x50 fs/bcachefs/fs.c:1788
 generic_shutdown_super+0x128/0x2b8 fs/super.c:641
 bch2_kill_sb+0x40/0x58 fs/bcachefs/fs.c:2012
 deactivate_locked_super+0xc4/0x12c fs/super.c:472
 deactivate_super+0xe0/0x100 fs/super.c:505
 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1267
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1274
 task_work_run+0x230/0x2e0 kernel/task_work.c:180
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 do_notify_resume+0x178/0x1f4 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+0xac/0x168 arch/arm64/kernel/entry-common.c:713
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
INFO: task bch-copygc/loop:6705 blocked for more than 143 seconds.
      Not tainted 6.9.0-rc7-syzkaller-gfda5695d692c #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:bch-copygc/loop state:D stack:0     pid:6705  tgid:6705  ppid:2      flags:0x00000048
Call trace:
 __switch_to+0x314/0x560 arch/arm64/kernel/process.c:553
 context_switch kernel/sched/core.c:5409 [inline]
 __schedule+0x14b8/0x24e8 kernel/sched/core.c:6746
 __schedule_loop kernel/sched/core.c:6823 [inline]
 schedule+0xbc/0x238 kernel/sched/core.c:6838
 __closure_sync+0x198/0x29c lib/closure.c:135
 closure_sync include/linux/closure.h:194 [inline]
 __bch2_write+0x4278/0x4898 fs/bcachefs/io_write.c:1486
 bch2_write+0x8c0/0x1520 fs/bcachefs/io_write.c:1610
 closure_queue include/linux/closure.h:257 [inline]
 closure_call include/linux/closure.h:390 [inline]
 bch2_data_update_read_done+0x14c/0x1e0 fs/bcachefs/data_update.c:350
 move_write fs/bcachefs/move.c:163 [inline]
 bch2_moving_ctxt_do_pending_writes+0x32c/0x824 fs/bcachefs/move.c:194
 move_buckets_wait+0x138/0xfac fs/bcachefs/movinggc.c:113
 bch2_copygc_thread+0xb1c/0xbe8 fs/bcachefs/movinggc.c:384
 kthread+0x288/0x310 kernel/kthread.c:388
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860

Showing all locks held in the system:
1 lock held by khungtaskd/30:
 #0: ffff80008f087940 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:328
1 lock held by klogd/5848:
2 locks held by getty/5997:
 #0: ffff0000ccdb20a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff800097bdb2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x41c/0x1228 drivers/tty/n_tty.c:2201
1 lock held by syz-fuzzer/6234:
2 locks held by syz-executor.3/6273:
 #0: ffff0000f434e0e0 (&type->s_umount_key#64){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
 #0: ffff0000f434e0e0 (&type->s_umount_key#64){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
 #0: ffff0000f434e0e0 (&type->s_umount_key#64){+.+.}-{3:3}, at: deactivate_super+0xd8/0x100 fs/super.c:504
 #1: ffff0000f6900278 (&c->state_lock){+.+.}-{3:3}, at: __bch2_fs_stop+0x104/0x51c fs/bcachefs/super.c:621
1 lock held by syz-executor.2/6276:
 #0: ffff80008f08cc78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
 #0: ffff80008f08cc78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x374/0x6c8 kernel/rcu/tree_exp.h:939

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