INFO: task syz.0.398:8016 blocked for more than 143 seconds. Not tainted 6.15.0-rc4-syzkaller-ge0f4c8dd9d2d #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.398 state:D stack:0 pid:8016 tgid:8011 ppid:6488 task_flags:0x400040 flags:0x00000001 Call trace: __switch_to+0x404/0x778 arch/arm64/kernel/process.c:701 (T) context_switch kernel/sched/core.c:5382 [inline] __schedule+0x13b0/0x28d4 kernel/sched/core.c:6767 __schedule_loop kernel/sched/core.c:6845 [inline] schedule+0xb4/0x230 kernel/sched/core.c:6860 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6917 __mutex_lock_common+0xbd0/0x2190 kernel/locking/mutex.c:678 __mutex_lock kernel/locking/mutex.c:746 [inline] mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:798 device_lock include/linux/device.h:922 [inline] usbdev_do_ioctl drivers/usb/core/devio.c:2611 [inline] usbdev_ioctl+0x118/0x1b24 drivers/usb/core/devio.c:2827 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl fs/ioctl.c:892 [inline] __arm64_sys_ioctl+0x14c/0x1c4 fs/ioctl.c:892 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Showing all locks held in the system: 2 locks held by kworker/u8:1/14: 1 lock held by khungtaskd/32: #0: ffff80008f4e7d20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x4/0x48 include/linux/rcupdate.h:330 2 locks held by kworker/u8:2/44: 3 locks held by kworker/u8:3/45: 2 locks held by kworker/u8:5/238: 3 locks held by kworker/u8:6/259: #0: ffff0000d2915948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff80009b7a7bc0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/u8:8/2171: 2 locks held by syslogd/6089: 1 lock held by klogd/6093: 1 lock held by udevd/6104: #0: ffff0000c183b148 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0x90/0x530 fs/kernfs/dir.c:1178 1 lock held by dhcpcd/6157: 1 lock held by dhcpcd/6158: 2 locks held by getty/6245: #0: ffff0000ccc8d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80009b5fb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x34c/0xfa0 drivers/tty/n_tty.c:2222 3 locks held by syz-executor/6477: 1 lock held by udevd/6481: #0: ffff0000c183b148 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0x90/0x530 fs/kernfs/dir.c:1178 1 lock held by syz-executor/6487: #0: ffff0000c183b148 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0x90/0x530 fs/kernfs/dir.c:1178 1 lock held by syz-executor/6489: #0: ffff0000c183b148 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0x90/0x530 fs/kernfs/dir.c:1178 5 locks held by kworker/u9:3/6494: #0: ffff0000c6fa8948 ((wq_completion)hci3){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a1ea7bc0 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff0000c74b8d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x184/0x33c net/bluetooth/hci_sync.c:331 #3: ffff0000c74b8078 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1b4/0xb94 net/bluetooth/hci_sync.c:5597 #4: ffff0000c183b148 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_remove_by_name_ns+0x3c/0x14c fs/kernfs/dir.c:1709 5 locks held by kworker/u9:4/6496: #0: ffff0000da5a7148 ((wq_completion)hci0){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a1e87bc0 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff0000d5514d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x184/0x33c net/bluetooth/hci_sync.c:331 #3: ffff0000d5514078 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1b4/0xb94 net/bluetooth/hci_sync.c:5597 #4: ffff0000c183b148 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_remove_by_name_ns+0x3c/0x14c fs/kernfs/dir.c:1709 1 lock held by syz-executor/6499: 5 locks held by kworker/u9:5/6500: #0: ffff0000c698d148 ((wq_completion)hci2){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a1e67bc0 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff0000e4798d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x184/0x33c net/bluetooth/hci_sync.c:331 #3: ffff0000e4798078 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1b4/0xb94 net/bluetooth/hci_sync.c:5597 #4: ffff0000c183b148 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_remove_by_name_ns+0x3c/0x14c fs/kernfs/dir.c:1709 5 locks held by kworker/u9:6/6502: #0: ffff0000c6faa148 ((wq_completion)hci4){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a3d97bc0 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff0000c74bcd80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x184/0x33c net/bluetooth/hci_sync.c:331 #3: ffff0000c74bc078 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1b4/0xb94 net/bluetooth/hci_sync.c:5597 #4: ffff0000c183b148 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_remove_by_name_ns+0x3c/0x14c fs/kernfs/dir.c:1709 5 locks held by kworker/u9:8/6504: #0: ffff0000c698b948 ((wq_completion)hci1){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a3d87bc0 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff0000dac54d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x184/0x33c net/bluetooth/hci_sync.c:331 #3: ffff0000dac54078 (&hdev->lock){+.+.}-{4:4}, at: hci_abort_conn_sync+0x1b4/0xb94 net/bluetooth/hci_sync.c:5597 #4: ffff0000c183b148 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_remove_by_name_ns+0x3c/0x14c fs/kernfs/dir.c:1709 1 lock held by udevd/6507: #0: ffff0000c183b148 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_dop_revalidate+0x90/0x530 fs/kernfs/dir.c:1178 2 locks held by kworker/0:5/6545: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a3ca7bc0 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 3 locks held by kworker/u8:9/6584: 3 locks held by kworker/u8:10/6585: 3 locks held by kworker/u8:11/6586: 4 locks held by kworker/u8:12/6717: #0: ffff0000c0031948 ((wq_completion)events_power_efficient){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff8000a1a37bc0 ((reg_check_chans).work){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000d4080768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6092 [inline] #3: ffff0000d4080768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_leave_invalid_chans net/wireless/reg.c:2471 [inline] #3: ffff0000d4080768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: reg_check_chans_work+0x11c/0xd88 net/wireless/reg.c:2486 3 locks held by kworker/u8:13/7050: 3 locks held by kworker/u8:14/7408: 2 locks held by syz.0.398/8013: 1 lock held by syz.0.398/8016: #0: ffff0000cd006198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline] #0: ffff0000cd006198 (&dev->mutex){....}-{4:4}, at: usbdev_do_ioctl drivers/usb/core/devio.c:2611 [inline] #0: ffff0000cd006198 (&dev->mutex){....}-{4:4}, at: usbdev_ioctl+0x118/0x1b24 drivers/usb/core/devio.c:2827 1 lock held by syz.2.401/8018: #0: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 5 locks held by kworker/u8:15/8023: 4 locks held by syz-executor/8026: 3 locks held by kworker/0:8/8027: #0: ffff0000c0028d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x658/0x156c kernel/workqueue.c:3212 #1: ffff80009dff7bc0 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x6ec/0x156c kernel/workqueue.c:3212 #2: ffff8000924681e8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 3 locks held by kworker/u8:18/8030: =============================================