INFO: task udevd:4701 blocked for more than 142 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:0 pid:4701 tgid:4701 ppid:4342 task_flags:0x400140 flags:0x00800000 Call trace: __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:775 (T) context_switch kernel/sched/core.c:5510 [inline] __schedule+0x1370/0x2d80 kernel/sched/core.c:7234 __schedule_loop kernel/sched/core.c:7311 [inline] schedule+0x13c/0x20c kernel/sched/core.c:7326 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7383 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x4ec/0xf14 kernel/locking/mutex.c:821 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:874 bdev_release+0x128/0x328 block/bdev.c:1131 blkdev_release+0x20/0x34 block/fops.c:680 __fput+0x338/0x74c fs/file_table.c:512 fput_close_sync+0x10c/0x278 fs/file_table.c:617 __do_sys_close fs/open.c:1511 [inline] __se_sys_close fs/open.c:1496 [inline] __arm64_sys_close+0x7c/0x10c fs/open.c:1496 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 Showing all locks held in the system: 2 locks held by kworker/0:0/9: 3 locks held by kworker/0:1/10: #0: ffff0000c002b540 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff0000c002b540 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405 #1: ffff80008ec37c40 (netdev_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffff80008ec37c40 (netdev_work){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405 #2: ffff800089dd3780 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 1 lock held by khungtaskd/31: #0: ffff800088cf6fe0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffff800088cf6fe0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline] #0: ffff800088cf6fe0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6775 3 locks held by kworker/u8:3/40: 1 lock held by pr/ttyAMA-1/41: 4 locks held by kworker/u9:0/50: #0: ffff0000d2595140 ((wq_completion)hci4){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff0000d2595140 ((wq_completion)hci4){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405 #1: ffff800090247c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffff800090247c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405 #2: ffff0000f340cea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x178/0x374 net/bluetooth/hci_sync.c:331 #3: ffff0000f340c0b8 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1d8/0x938 net/bluetooth/hci_sync.c:5822 4 locks held by kworker/u8:4/485: 2 locks held by kworker/u8:5/777: 3 locks held by kworker/0:2/1041: 1 lock held by klogd/4331: 2 locks held by udevd/4342: 2 locks held by getty/4490: #0: ffff0000c916b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff8000924cb2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x348/0xf78 drivers/tty/n_tty.c:2211 1 lock held by udevd/4701: #0: ffff0000c7418350 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x128/0x328 block/bdev.c:1131 5 locks held by kworker/u9:2/4714: #0: ffff0000cbd2d940 ((wq_completion)hci1){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff0000cbd2d940 ((wq_completion)hci1){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405 #1: ffff8000a7db7c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffff8000a7db7c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405 #2: ffff0000f6418ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x178/0x374 net/bluetooth/hci_sync.c:331 #3: ffff0000f64180b8 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1d8/0x938 net/bluetooth/hci_sync.c:5822 #4: ffff800089f35780 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2134 [inline] #4: ffff800089f35780 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x13c/0x334 net/bluetooth/hci_conn.c:1408 1 lock held by syz-executor/4715: 5 locks held by kworker/u9:5/4720: #0: ffff0000c688a140 ((wq_completion)hci3){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff0000c688a140 ((wq_completion)hci3){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405 #1: ffff8000a85f7c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffff8000a85f7c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405 #2: ffff0000f2cc4ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x178/0x374 net/bluetooth/hci_sync.c:331 #3: ffff0000f2cc40b8 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1d8/0x938 net/bluetooth/hci_sync.c:5822 #4: ffff800089f35780 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2134 [inline] #4: ffff800089f35780 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x13c/0x334 net/bluetooth/hci_conn.c:1408 6 locks held by kworker/u9:6/4723: #0: ffff000105a74140 ((wq_completion)hci0){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff000105a74140 ((wq_completion)hci0){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405 #1: ffff8000a8627c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffff8000a8627c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405 #2: ffff0000f3750ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x178/0x374 net/bluetooth/hci_sync.c:331 #3: ffff0000f37500b8 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1d8/0x938 net/bluetooth/hci_sync.c:5822 #4: ffff800089f35780 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2134 [inline] #4: ffff800089f35780 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x13c/0x334 net/bluetooth/hci_conn.c:1408 #5: ffff0000f901b2f8 (&conn->lock#2){+.+.}-{4:4}, at: l2cap_conn_del+0x90/0x408 net/bluetooth/l2cap_core.c:1808 1 lock held by kworker/0:3/4796: 3 locks held by kworker/0:4/4810: 3 locks held by kworker/0:5/4817: 2 locks held by kworker/0:6/4824: 2 locks held by kworker/u8:15/5870: 4 locks held by kworker/u8:16/5871: 3 locks held by kworker/u8:17/5873: 4 locks held by kworker/u8:19/5875: 3 locks held by kworker/u8:24/5881: 3 locks held by kworker/u8:25/5883: 3 locks held by kworker/u8:26/5886: 2 locks held by kworker/u8:28/5889: 1 lock held by syz-executor/8242: 7 locks held by syz-executor/8290: 2 locks held by kworker/0:7/8323: #0: ffff0000c002b540 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff0000c002b540 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405 #1: ffff8000929c7c40 (key_gc_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffff8000929c7c40 (key_gc_work){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405 3 locks held by kworker/0:8/8324: 4 locks held by kworker/u8:30/8394: 2 locks held by kworker/u8:31/8395: 3 locks held by kworker/u8:32/8396: #0: ffff0000ce4a6140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff0000ce4a6140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405 #1: ffff800092497c40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffff800092497c40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405 #2: ffff800089dd3780 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/u8:33/8397: #0: ffff0000c004b940 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #0: ffff0000c004b940 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3405 #1: ffff800092487c40 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline] #1: ffff800092487c40 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3405 #2: ffff800089dd3780 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/u8:34/8398: 3 locks held by kworker/u8:35/8399: 2 locks held by kworker/u8:36/8400: 3 locks held by kworker/u8:37/8401: 3 locks held by kworker/u8:44/8408: 3 locks held by kworker/u8:54/8423: 5 locks held by kworker/u8:55/8425: 2 locks held by kworker/u8:56/8426: 4 locks held by kworker/u8:57/8427: 3 locks held by kworker/u8:58/8428: 3 locks held by kworker/u8:60/8430: 2 locks held by syz.5.789/8556: 2 locks held by syz.5.789/8598: 2 locks held by sed/8606: #0: ffff0000c914c450 (sb_writers#3){++++}-{0:0}, at: pick_link+0x928/0xcf4 fs/namei.c:2049 #1: ffff0000c9148938 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x19b8/0x1bcc fs/jbd2/transaction.c:-1 3 locks held by kworker/0:9/8612: =============================================