INFO: task bch-reclaim/loo:6705 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:6705 tgid:6705 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: 3 locks held by kworker/0:1/11: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3210 #1: ffff800097c67be0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3210 #2: ffff0000ca824240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x1cc/0x25b8 drivers/net/netdevsim/fib.c:1490 1 lock held by khungtaskd/32: #0: ffff80008f9d9620 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 2 locks held by kworker/u8:3/42: 6 locks held by kworker/u8:6/5472: 2 locks held by getty/6315: #0: ffff0000d38d50a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff800099e8e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa4 drivers/tty/n_tty.c:2222 5 locks held by syz-executor/6528: #0: ffff0000c63360e0 (&type->s_umount_key#52){+.+.}-{4:4}, at: __super_lock fs/super.c:57 [inline] #0: ffff0000c63360e0 (&type->s_umount_key#52){+.+.}-{4:4}, at: __super_lock_excl fs/super.c:72 [inline] #0: ffff0000c63360e0 (&type->s_umount_key#52){+.+.}-{4:4}, at: deactivate_super+0xd8/0x100 fs/super.c:506 #1: ffff0000f7d00278 (&c->state_lock){++++}-{4:4}, at: __bch2_fs_stop+0xfc/0x800 fs/bcachefs/super.c:676 #2: ffff0000f7d04740 (&wb->flushing.lock){+.+.}-{4:4}, at: btree_write_buffer_flush_seq+0x1078/0x11c0 fs/bcachefs/btree_write_buffer.c:571 #3: ffff0000f7d04398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:160 #4: ffff0000f7d26710 (&c->gc_lock){++++}-{4:4}, at: bch2_btree_update_start+0x468/0x1ab8 fs/bcachefs/btree_update_interior.c:1211 3 locks held by kworker/u9:4/6534: #0: ffff0000dd9e1948 ((wq_completion)hci3){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3210 #1: ffff8000a2f07be0 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3210 #2: ffff0000c88bcdc0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x184/0x33c net/bluetooth/hci_sync.c:331 3 locks held by kworker/1:3/6572: 3 locks held by kworker/0:4/6591: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x63c/0x155c kernel/workqueue.c:3210 #1: ffff8000a2bf7be0 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x6d4/0x155c kernel/workqueue.c:3210 #2: ffff0000febd3240 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x1cc/0x25b8 drivers/net/netdevsim/fib.c:1490 3 locks held by bch-reclaim/loo/6705: #0: ffff0000f7d4af68 (&j->reclaim_lock){+.+.}-{4:4}, at: bch2_journal_reclaim_thread+0x12c/0x480 fs/bcachefs/journal_reclaim.c:773 #1: ffff0000f7d04398 (&c->btree_trans_barrier){.+.+}-{0:0}, at: srcu_lock_acquire+0x18/0x54 include/linux/srcu.h:160 #2: ffff0000f7d04740 (&wb->flushing.lock){+.+.}-{4:4}, at: btree_write_buffer_flush_seq+0x1078/0x11c0 fs/bcachefs/btree_write_buffer.c:571 3 locks held by syz-executor/11877: #0: ffff0000c70b8dc0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close net/bluetooth/hci_core.c:499 [inline] #0: ffff0000c70b8dc0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_unregister_dev+0x1fc/0x4c0 net/bluetooth/hci_core.c:2715 #1: ffff0000c70b80b8 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x4c4/0x1154 net/bluetooth/hci_sync.c:5282 #2: ffff0000c184b988 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_find_and_get_ns+0x38/0x114 fs/kernfs/dir.c:933 4 locks held by syz.4.687/11932: 1 lock held by syz.4.687/11935: #0: ffff8000900a3710 (key_types_sem){++++}-{4:4}, at: key_type_lookup+0x34/0xc8 security/keys/key.c:720 1 lock held by syz.4.687/11936: #0: ffff800092a8b3e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by syz.2.686/11929: #0: ffff0000d8ed86d8 (nlk_cb_mutex-GENERIC){+.+.}-{4:4}, at: netlink_dump+0xb8/0xbec net/netlink/af_netlink.c:2269 1 lock held by syz.2.686/11933: #0: ffff0000d8ed86d8 (nlk_cb_mutex-GENERIC){+.+.}-{4:4}, at: netlink_dump+0xb8/0xbec net/netlink/af_netlink.c:2269 3 locks held by syz.2.686/11934: #0: ffff800092af01b0 (cb_lock){++++}-{4:4}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:1218 #1: ffff0000d8ed86d8 (nlk_cb_mutex-GENERIC){+.+.}-{4:4}, at: __netlink_dump_start+0xec/0x72c net/netlink/af_netlink.c:2406 #2: ffff800092a8b3e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by syz-executor/11927: =============================================