INFO: task syz.9.849:8888 blocked for more than 162 seconds. Tainted: G L syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.9.849 state:D stack:0 pid:8888 tgid:8887 ppid:7534 task_flags:0x400140 flags:0x00000011 Call trace: __switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T) context_switch kernel/sched/core.c:5388 [inline] __schedule+0x1c04/0x2db8 kernel/sched/core.c:7189 __schedule_loop kernel/sched/core.c:7268 [inline] schedule+0x13c/0x20c kernel/sched/core.c:7283 request_wait_answer fs/fuse/dev.c:590 [inline] __fuse_request_send fs/fuse/dev.c:604 [inline] __fuse_simple_request+0xac4/0x12f4 fs/fuse/dev.c:699 fuse_simple_request fs/fuse/fuse_i.h:1262 [inline] fuse_send_open fs/fuse/file.c:52 [inline] fuse_file_open+0x364/0x6e4 fs/fuse/file.c:164 fuse_do_open+0x68/0xcc fs/fuse/file.c:194 fuse_dir_open+0x108/0x20c fs/fuse/dir.c:1903 do_dentry_open+0x5c4/0xfb8 fs/open.c:947 vfs_open+0x44/0x2dc fs/open.c:1079 do_open fs/namei.c:4699 [inline] path_openat+0x22d4/0x2b88 fs/namei.c:4858 do_file_open+0x1c8/0x2e8 fs/namei.c:4887 do_sys_openat2+0x114/0x1e8 fs/open.c:1364 do_sys_open+0xac/0xdc fs/open.c:1370 __do_sys_openat fs/open.c:1386 [inline] __se_sys_openat fs/open.c:1381 [inline] __arm64_sys_openat+0xa0/0xbc fs/open.c:1381 __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: 4 locks held by kworker/1:0/24: 2 locks held by kworker/1:1/26: 1 lock held by kauditd/30: 1 lock held by khungtaskd/31: #0: ffff800088bf70c0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline] #0: ffff800088bf70c0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline] #0: ffff800088bf70c0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6775 2 locks held by kworker/u8:2/39: 3 locks held by kworker/u8:3/40: 1 lock held by pr/ttyAMA-1/41: 3 locks held by kworker/u8:6/4269: 2 locks held by kworker/1:3/4304: 2 locks held by getty/4485: #0: ffff0000d468b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff8000923ab2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x348/0xf70 drivers/tty/n_tty.c:2211 3 locks held by udevd/4694: 6 locks held by kworker/u9:1/4706: #0: ffff0000f26e3140 ((wq_completion)hci2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000f26e3140 ((wq_completion)hci2){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3397 #1: ffff800093847c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff800093847c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3397 #2: ffff0000eade0ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x178/0x374 net/bluetooth/hci_sync.c:331 #3: ffff0000eade00b8 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1d8/0x938 net/bluetooth/hci_sync.c:5764 #4: ffff800089e296c0 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2136 [inline] #4: ffff800089e296c0 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x13c/0x334 net/bluetooth/hci_conn.c:1411 #5: ffff0000d6403af8 (&conn->lock#2){+.+.}-{4:4}, at: l2cap_conn_del+0x80/0x450 net/bluetooth/l2cap_core.c:1779 4 locks held by kworker/u9:3/4711: #0: ffff0000ccf4b940 ((wq_completion)hci0){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000ccf4b940 ((wq_completion)hci0){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3397 #1: ffff800093817c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff800093817c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3397 #2: ffff0000ce7b4ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x178/0x374 net/bluetooth/hci_sync.c:331 #3: ffff0000ce7b40b8 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1d8/0x938 net/bluetooth/hci_sync.c:5764 2 locks held by kworker/1:4/4716: 5 locks held by kworker/u9:4/4718: #0: ffff0000dbe92940 ((wq_completion)hci4){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000dbe92940 ((wq_completion)hci4){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3397 #1: ffff8000937f7c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff8000937f7c40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3397 #2: ffff000112684ea0 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x178/0x374 net/bluetooth/hci_sync.c:331 #3: ffff0001126840b8 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1d8/0x938 net/bluetooth/hci_sync.c:5764 #4: ffff800089e296c0 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_connect_cfm include/net/bluetooth/hci_core.h:2136 [inline] #4: ffff800089e296c0 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_failed+0x13c/0x334 net/bluetooth/hci_conn.c:1411 2 locks held by kworker/0:6/4817: 3 locks held by kworker/u8:7/4849: 5 locks held by kworker/u8:8/4980: #0: ffff0000c004e140 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000c004e140 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3397 #1: ffff800093477c40 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff800093477c40 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3397 #2: ffff800089cbce08 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x104/0x6c4 net/core/net_namespace.c:673 #3: ffff0000d8e1e128 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1040 [inline] #3: ffff0000d8e1e128 (&dev->mutex){....}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:124 [inline] #3: ffff0000d8e1e128 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0x108/0x30c net/devlink/core.c:557 #4: ffff0000d8b49258 (&devlink->lock_key#5){+.+.}-{4:4}, at: devl_lock net/devlink/core.c:292 [inline] #4: ffff0000d8b49258 (&devlink->lock_key#5){+.+.}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:125 [inline] #4: ffff0000d8b49258 (&devlink->lock_key#5){+.+.}-{4:4}, at: devlink_pernet_pre_exit+0x11c/0x30c net/devlink/core.c:557 3 locks held by kworker/u8:9/4981: 4 locks held by kworker/u8:11/4983: #0: ffff0000c004b940 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000c004b940 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3397 #1: ffff800093437c40 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff800093437c40 ((reg_check_chans).work){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3397 #2: ffff800089cca300 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000ece30780 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6646 [inline] #3: ffff0000ece30780 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_leave_invalid_chans net/wireless/reg.c:2454 [inline] #3: ffff0000ece30780 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_check_chans_work+0x144/0x10e8 net/wireless/reg.c:2469 3 locks held by kworker/u8:13/4986: 3 locks held by kworker/u8:14/4987: 3 locks held by kworker/u8:15/4988: 3 locks held by kworker/u8:16/4989: 3 locks held by kworker/u8:17/4990: 2 locks held by kworker/u8:18/4991: 2 locks held by kworker/u8:20/4996: 3 locks held by kworker/u8:21/4997: 3 locks held by kworker/u8:22/4998: 3 locks held by kworker/u8:23/4999: 3 locks held by kworker/u8:24/5000: 3 locks held by kworker/u8:26/5004: 3 locks held by kworker/u8:27/5005: 3 locks held by kworker/u8:29/5008: 3 locks held by kworker/u8:30/5009: 3 locks held by kworker/u8:32/5011: 3 locks held by kworker/u8:33/5012: 3 locks held by kworker/u8:34/5013: 3 locks held by kworker/u8:35/5014: 3 locks held by kworker/u8:36/5015: 2 locks held by syz-executor/5198: 3 locks held by kworker/u8:37/8986: #0: ffff0000cef15940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #0: ffff0000cef15940 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x734/0x10b8 kernel/workqueue.c:3397 #1: ffff800093c27c40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3289 [inline] #1: ffff800093c27c40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x73c/0x10b8 kernel/workqueue.c:3397 #2: ffff800089cca300 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 =============================================