INFO: task kworker/0:1:3562 blocked for more than 144 seconds. Not tainted 5.15.118-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:1 state:D stack:23360 pid: 3562 ppid: 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5026 [inline] __schedule+0x12c4/0x4590 kernel/sched/core.c:6372 schedule+0x11b/0x1f0 kernel/sched/core.c:6455 usb_kill_urb+0x1c9/0x300 drivers/usb/core/urb.c:726 usb_start_wait_urb+0x1ac/0x510 drivers/usb/core/message.c:64 usb_internal_control_msg drivers/usb/core/message.c:102 [inline] usb_control_msg+0x2ad/0x4c0 drivers/usb/core/message.c:153 hub_port_init+0xa05/0x23f0 drivers/usb/core/hub.c:4832 hub_port_connect drivers/usb/core/hub.c:5287 [inline] hub_port_connect_change drivers/usb/core/hub.c:5502 [inline] port_event drivers/usb/core/hub.c:5648 [inline] hub_event+0x29ec/0x56d0 drivers/usb/core/hub.c:5730 process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2307 worker_thread+0xaca/0x1280 kernel/workqueue.c:2454 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8c91c5e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by getty/3262: #0: ffff88814adbc098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc90002bb32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1da0 drivers/tty/n_tty.c:2147 1 lock held by syz-executor.2/3560: #0: ffff88809024a0e0 (&type->s_umount_key#62){++++}-{3:3}, at: deactivate_super+0xa9/0xe0 fs/super.c:365 2 locks held by syz-executor.3/3561: #0: ffff88808fd7e0e0 (&type->s_umount_key#62){++++}-{3:3}, at: deactivate_super+0xa9/0xe0 fs/super.c:365 #1: ffffffff8c920b28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #1: ffffffff8c920b28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x280/0x740 kernel/rcu/tree_exp.h:842 5 locks held by kworker/0:1/3562: #0: ffff8881411ead38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280 #1: ffffc90002eafd20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282 #2: ffff888147e75220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #2: ffff888147e75220 (&dev->mutex){....}-{3:3}, at: hub_event+0x207/0x56d0 drivers/usb/core/hub.c:5676 #3: ffff888147e805c0 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3091 [inline] #3: ffff888147e805c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5254 [inline] #3: ffff888147e805c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5502 [inline] #3: ffff888147e805c0 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5648 [inline] #3: ffff888147e805c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x2325/0x56d0 drivers/usb/core/hub.c:5730 #4: ffff888147851d68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5255 [inline] #4: ffff888147851d68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5502 [inline] #4: ffff888147851d68 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5648 [inline] #4: ffff888147851d68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x235a/0x56d0 drivers/usb/core/hub.c:5730 2 locks held by kworker/u4:17/9474: 3 locks held by kworker/1:4/2428: #0: ffff888011c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280 #1: ffffc90002effd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282 #2: ffffffff8c920b28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] #2: ffffffff8c920b28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x350/0x740 kernel/rcu/tree_exp.h:842 2 locks held by kworker/1:16/5987: #0: ffff888011c66538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2280 #1: ffffc9000c2c7d20 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2282 3 locks held by syz-executor.5/10980: 2 locks held by syz-executor.4/10983: ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.118-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xe72/0xeb0 kernel/hung_task.c:295 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3560 Comm: syz-executor.2 Not tainted 5.15.118-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:write_comp_data kernel/kcov.c:217 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x4/0x80 kernel/kcov.c:291 Code: 89 f8 89 f6 48 c7 44 0a 08 05 00 00 00 48 89 44 0a 10 48 89 74 0a 18 4c 89 44 0a 20 49 ff c1 4c 89 09 c3 0f 1f 00 4c 8b 04 24 <65> 48 8b 0d 84 71 82 7e 65 8b 05 85 71 82 7e a9 00 01 ff 00 74 10 RSP: 0018:ffffc90002e5fb48 EFLAGS: 00000046 RAX: 0000000000000000 RBX: ffffffffffffffff RCX: ffff888023120000 RDX: 0000000000000000 RSI: fffffffffffff800 RDI: 0000000000000000 RBP: fffffffffffff800 R08: ffffffff8405465c R09: 0000000000000000 R10: ffffffffffffffff R11: dffffc0000000001 R12: fffffffffffff800 R13: 0000000000000000 R14: 0000000000020000 R15: 0000000000002800 FS: 000055555751c400(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f108806f000 CR3: 000000008c2ee000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: _find_next_bit+0xec/0x1f0 lib/find_bit.c:55 find_next_bit include/asm-generic/bitops/find.h:36 [inline] zap_class+0x447/0x870 kernel/locking/lockdep.c:5970 __lockdep_free_key_range kernel/locking/lockdep.c:6115 [inline] lockdep_unregister_key+0x369/0x5b0 kernel/locking/lockdep.c:6311 wq_unregister_lockdep kernel/workqueue.c:3506 [inline] destroy_workqueue+0x81f/0xae0 kernel/workqueue.c:4473 xfs_destroy_mount_workqueues+0x87/0x100 fs/xfs/xfs_super.c:574 xfs_fs_put_super+0x22c/0x2b0 fs/xfs/xfs_super.c:1097 generic_shutdown_super+0x136/0x2c0 fs/super.c:475 kill_block_super+0x7a/0xe0 fs/super.c:1405 deactivate_locked_super+0xa0/0x110 fs/super.c:335 cleanup_mnt+0x44e/0x500 fs/namespace.c:1143 task_work_run+0x129/0x1a0 kernel/task_work.c:164 tracehook_notify_resume include/linux/tracehook.h:189 [inline] exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:175 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208 __syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline] syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fd5440f77f7 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe7523cf98 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd5440f77f7 RDX: 00007ffe7523d06c RSI: 000000000000000a RDI: 00007ffe7523d060 RBP: 00007ffe7523d060 R08: 00000000ffffffff R09: 00007ffe7523ce30 R10: 000055555751d893 R11: 0000000000000246 R12: 00007fd54414043b R13: 00007ffe7523e120 R14: 000055555751d810 R15: 00007ffe7523e160