INFO: task bch-reclaim/loo:6772 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:bch-reclaim/loo state:D stack:0     pid:6772  tgid:6772  ppid:2      task_flags:0x200840 flags:0x00000010
Call trace:
 __switch_to+0x418/0x87c arch/arm64/kernel/process.c:741 (T)
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x13b0/0x2864 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0xb4/0x230 kernel/sched/core.c:7058
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7115
 __mutex_lock_common+0xd04/0x2678 kernel/locking/mutex.c:676
 __mutex_lock kernel/locking/mutex.c:760 [inline]
 mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:812
 btree_write_buffer_flush_seq+0x1078/0x11c0 fs/bcachefs/btree_write_buffer.c:571
 bch2_btree_write_buffer_journal_flush+0x70/0xc8 fs/bcachefs/btree_write_buffer.c:588
 journal_flush_pins+0x6f4/0xc98 fs/bcachefs/journal_reclaim.c:604
 __bch2_journal_reclaim+0x858/0xf84 fs/bcachefs/journal_reclaim.c:732
 bch2_journal_reclaim_thread+0x13c/0x480 fs/bcachefs/journal_reclaim.c:774
 kthread+0x5fc/0x75c kernel/kthread.c:463
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844

Showing all locks held in the system:
1 lock held by khungtaskd/32:
 #0: ffff80008fa49aa0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330
1 lock held by pr/ttyAMA-1/43:
1 lock held by klogd/6174:
2 locks held by getty/6329:
 #0: ffff0000d75120a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
 #1: ffff800099f5e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222
5 locks held by syz-executor/6543:
 #0: ffff0000ca1d80e0 (&type->s_umount_key#62){++++}-{4:4}, at: __super_lock fs/super.c:57 [inline]
 #0: ffff0000ca1d80e0 (&type->s_umount_key#62){++++}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline]
 #0: ffff0000ca1d80e0 (&type->s_umount_key#62){++++}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506
 #1: ffff0000f9a00278 (&c->state_lock){++++}-{4:4}, at: __bch2_fs_stop+0xfc/0x800 fs/bcachefs/super.c:676
 #2: ffff0000f9a04740 (&wb->flushing.lock){+.+.}-{4:4}, at: btree_write_buffer_flush_seq+0x1078/0x11c0 fs/bcachefs/btree_write_buffer.c:571
 #3: ffff0000f9a04398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:160
 #4: ffff0000f9a26710 (&c->gc_lock){++++}-{4:4}, at: bch2_btree_update_start+0x468/0x1ab8 fs/bcachefs/btree_update_interior.c:1211
3 locks held by bch-reclaim/loo/6772:
 #0: ffff0000f9a4af68 (&j->reclaim_lock){+.+.}-{4:4}, at: bch2_journal_reclaim_thread+0x12c/0x480 fs/bcachefs/journal_reclaim.c:773
 #1: ffff0000f9a04398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:160
 #2: ffff0000f9a04740 (&wb->flushing.lock){+.+.}-{4:4}, at: btree_write_buffer_flush_seq+0x1078/0x11c0 fs/bcachefs/btree_write_buffer.c:571
1 lock held by syz.4.106/7232:
 #0: ffff0000ca1d80e0 (&type->s_umount_key#62){++++}-{4:4}, at: __super_lock fs/super.c:59 [inline]
 #0: ffff0000ca1d80e0 (&type->s_umount_key#62){++++}-{4:4}, at: super_lock+0x240/0x32c fs/super.c:121

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