INFO: task kworker/1:4:167 blocked for more than 143 seconds. Not tainted 5.7.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:4 D24128 167 2 0x80004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:3367 [inline] __schedule+0x892/0x1d80 kernel/sched/core.c:4083 lock_downgrade+0x720/0x720 kernel/locking/lockdep.c:4599 __sched_text_start+0x8/0x8 __trace_hardirqs_on_caller kernel/locking/lockdep.c:3657 [inline] lockdep_hardirqs_on+0x3c7/0x5d0 kernel/locking/lockdep.c:3702 schedule+0xcd/0x2b0 kernel/sched/core.c:4158 schedule_preempt_disabled+0xc/0x20 kernel/sched/core.c:4217 __mutex_lock_common kernel/locking/mutex.c:1033 [inline] __mutex_lock+0x87c/0x1360 kernel/locking/mutex.c:1103 input_disconnect_device drivers/input/input.c:733 [inline] __input_unregister_device+0x23/0x430 drivers/input/input.c:2086 usb_poison_urb+0x2a0/0x2a0 drivers/usb/core/urb.c:736 mutex_trylock+0x2c0/0x2c0 kernel/locking/mutex.c:126 finish_wait+0x260/0x260 include/linux/list.h:301 mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:3628 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0x1f/0x30 kernel/locking/spinlock.c:199 usb_free_urb+0x1b/0x30 drivers/usb/core/urb.c:95 __read_once_size include/linux/compiler.h:199 [inline] list_empty include/linux/list.h:282 [inline] usb_hcd_flush_endpoint+0x15c/0x410 drivers/usb/core/hcd.c:1787 input_disconnect_device drivers/input/input.c:733 [inline] __input_unregister_device+0x23/0x430 drivers/input/input.c:2086 input_disconnect_device drivers/input/input.c:733 [inline] __input_unregister_device+0x23/0x430 drivers/input/input.c:2086 input_unregister_device+0xb4/0xf0 drivers/input/input.c:2273 iforce_usb_disconnect+0x5e/0xf0 drivers/input/joystick/iforce/iforce-usb.c:261 usb_unbind_interface+0x1bd/0x8a0 drivers/usb/core/driver.c:436 __pm_runtime_idle+0xd1/0x310 drivers/base/power/runtime.c:1021 usb_autoresume_device+0x60/0x60 include/linux/pm_runtime.h:252 __device_release_driver drivers/base/dd.c:1110 [inline] device_release_driver_internal+0x432/0x500 drivers/base/dd.c:1141 bus_remove_device+0x2eb/0x5a0 drivers/base/bus.c:533 device_del+0x481/0xd30 drivers/base/core.c:2715 device_create_with_groups+0x120/0x120 drivers/base/core.c:3308 usb_remove_ep_devs+0x3e/0x80 drivers/usb/core/endpoint.c:215 remove_intf_ep_devs+0x13f/0x1d0 drivers/usb/core/message.c:1121 usb_disable_device+0x23d/0x790 drivers/usb/core/message.c:1245 usb_disconnect+0x293/0x900 drivers/usb/core/hub.c:2217 hub_port_connect drivers/usb/core/hub.c:5059 [inline] hub_port_connect_change drivers/usb/core/hub.c:5348 [inline] port_event drivers/usb/core/hub.c:5494 [inline] hub_event+0x1abf/0x43c0 drivers/usb/core/hub.c:5576 hub_port_debounce+0x350/0x350 drivers/usb/core/hub.c:4441 __x64_sys_sysinfo+0x30/0x40 kernel/sys.c:2604 lock_is_held include/linux/lockdep.h:406 [inline] rcu_read_lock_sched_held+0x9c/0xd0 kernel/rcu/update.c:121 rcu_read_lock_bh_held+0xb0/0xb0 kernel/rcu/update.c:333 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] _raw_spin_unlock_irq+0x1f/0x30 kernel/locking/spinlock.c:199 process_one_work+0x965/0x1630 kernel/workqueue.c:2268 lock_release+0x720/0x720 kernel/locking/lockdep.c:4689 pwq_dec_nr_in_flight+0x310/0x310 kernel/workqueue.c:1198 rwlock_bug.part.0+0x90/0x90 include/linux/sched.h:1332 worker_thread+0x96/0xe20 kernel/workqueue.c:2414 process_one_work+0x1630/0x1630 kernel/workqueue.c:1029 kthread+0x326/0x430 kernel/kthread.c:268 kthread_create_on_node+0xf0/0xf0 kernel/kthread.c:405 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 Showing all locks held in the system: 2 locks held by kworker/1:0/17: #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x844/0x1630 kernel/workqueue.c:2239 #1: ffff8881da25fdc0 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x878/0x1630 kernel/workqueue.c:2243 6 locks held by kworker/1:1/22: 1 lock held by khungtaskd/23: #0: ffffffff87111260 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x264 kernel/locking/lockdep.c:5754 2 locks held by kworker/0:2/95: #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x844/0x1630 kernel/workqueue.c:2239 #1: ffff8881d566fdc0 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x878/0x1630 kernel/workqueue.c:2243 6 locks held by kworker/1:4/167: #0: ffff8881d8960d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8881d8960d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881d8960d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8881d8960d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8881d8960d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8881d8960d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8881d8960d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x844/0x1630 kernel/workqueue.c:2239 #1: ffff8881cdd37dc0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x878/0x1630 kernel/workqueue.c:2243 #2: ffff8881d4b1c218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:768 [inline] #2: ffff8881d4b1c218 (&dev->mutex){....}-{3:3}, at: hub_event+0x1be/0x43c0 drivers/usb/core/hub.c:5522 #3: ffff8881d4c73218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:768 [inline] #3: ffff8881d4c73218 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0x91/0x900 drivers/usb/core/hub.c:2208 #4: ffff8881c61531a8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0x23/0x500 drivers/base/dd.c:1138 #5: ffff8881d435a2c0 (&dev->mutex#2){+.+.}-{3:3}, at: input_disconnect_device drivers/input/input.c:733 [inline] #5: ffff8881d435a2c0 (&dev->mutex#2){+.+.}-{3:3}, at: __input_unregister_device+0x23/0x430 drivers/input/input.c:2086 1 lock held by in:imklog/276: #0: ffff8881c5d86870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:826 3 locks held by kworker/0:4/3083: #0: ffff8881da269d38 ((wq_completion)pm){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8881da269d38 ((wq_completion)pm){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881da269d38 ((wq_completion)pm){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8881da269d38 ((wq_completion)pm){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8881da269d38 ((wq_completion)pm){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8881da269d38 ((wq_completion)pm){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8881da269d38 ((wq_completion)pm){+.+.}-{0:0}, at: process_one_work+0x844/0x1630 kernel/workqueue.c:2239 #1: ffff8881cf36fdc0 ((work_completion)(&hcd->wakeup_work)){+.+.}-{0:0}, at: process_one_work+0x878/0x1630 kernel/workqueue.c:2243 #2: ffff8881d4ac4218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:768 [inline] #2: ffff8881d4ac4218 (&dev->mutex){....}-{3:3}, at: usb_remote_wakeup+0x1f/0xe0 drivers/usb/core/hub.c:3625 5 locks held by kworker/1:5/3171: 3 locks held by kworker/1:7/3246: #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: __write_once_size include/linux/compiler.h:226 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:855 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:40 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:615 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:642 [inline] #0: ffff8881da028d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x844/0x1630 kernel/workqueue.c:2239 #1: ffff8881c8137dc0 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x878/0x1630 kernel/workqueue.c:2243 #2: ffff8881d4b3c218 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:768 [inline] #2: ffff8881d4b3c218 (&dev->mutex){....}-{3:3}, at: ath9k_hif_usb_firmware_fail drivers/net/wireless/ath/ath9k/hif_usb.c:1077 [inline] #2: ffff8881d4b3c218 (&dev->mutex){....}-{3:3}, at: ath9k_hif_usb_firmware_cb+0x388/0x510 drivers/net/wireless/ath/ath9k/hif_usb.c:1210 2 locks held by systemd-udevd/3771: #0: ffff8881c6b0b160 (&evdev->mutex){+.+.}-{3:3}, at: evdev_close_device drivers/input/evdev.c:425 [inline] #0: ffff8881c6b0b160 (&evdev->mutex){+.+.}-{3:3}, at: evdev_release+0xeb/0x1c0 drivers/input/evdev.c:466 #1: ffff8881d435a2c0 (&dev->mutex#2){+.+.}-{3:3}, at: input_close_device+0x42/0x1a0 drivers/input/input.c:674 2 locks held by agetty/4165: #0: ffff8881cdd43098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:267 #1: ffffc9000f1362e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x220/0x1b30 drivers/tty/n_tty.c:2156 2 locks held by syz-executor.2/4627: 3 locks held by syz-executor.0/4629: 2 locks held by syz-executor.0/4635: #0: ffff8881d38fe438 (sb_writers#3){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1655 [inline] #0: ffff8881d38fe438 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write_file+0x63/0x110 fs/namespace.c:412 #1: ffff8881abfe26c8 (&sb->s_type->i_mutex_key#12){++++}-{3:3}, at: inode_lock include/linux/fs.h:797 [inline] #1: ffff8881abfe26c8 (&sb->s_type->i_mutex_key#12){++++}-{3:3}, at: lock_two_nondirectories+0xec/0x110 fs/inode.c:1032 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 5.7.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0xef/0x16e lib/dump_stack.c:118 irq_force_complete_move.cold+0x13/0x47 arch/x86/kernel/apic/vector.c:1023 nmi_cpu_backtrace.cold+0x70/0xb1 lib/nmi_backtrace.c:101 lapic_can_unplug_cpu.cold+0x3b/0x3b nmi_trigger_cpumask_backtrace+0x1db/0x207 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xa99/0xfd0 kernel/hung_task.c:289 reset_hung_task_detector+0x30/0x30 kernel/hung_task.c:243 kthread+0x326/0x430 kernel/kthread.c:268 kthread_create_on_node+0xf0/0xf0 kernel/kthread.c:405 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3835 Comm: systemd-udevd Not tainted 5.7.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:set_track mm/kasan/common.c:57 [inline] RIP: 0010:__kasan_kmalloc mm/kasan/common.c:495 [inline] RIP: 0010:__kasan_kmalloc.constprop.0+0xa4/0xd0 mm/kasan/common.c:468 Code: 75 21 48 83 c4 08 4c 89 e0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 89 14 24 e8 99 29 00 00 48 8b 34 24 eb 84 49 63 9e c4 01 00 00 <89> ef 65 48 8b 04 25 40 0f 02 00 8b 80 90 04 00 00 4c 01 e3 89 03 RSP: 0018:ffff8881c297fcc0 EFLAGS: 00000202 RAX: ffffed1034c92640 RBX: 0000000000001000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 00000000000000fc RDI: ffffed1034c92640 RBP: 0000000000000cc0 R08: 0000000000039cc0 R09: ffffed1034c92640 R10: ffffffff87e88c47 R11: fffffbfff0fd1188 R12: ffff8881a6492200 R13: 0000000000000000 R14: ffff8881da11e000 R15: ffff8881a64931ff FS: 00007f12c1d4a8c0(0000) GS:ffff8881db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020a171ff CR3: 00000001c5c3d000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: getname_flags fs/namei.c:138 [inline] getname_flags+0xd2/0x5b0 fs/namei.c:128 slab_post_alloc_hook mm/slab.h:586 [inline] slab_alloc_node mm/slub.c:2797 [inline] slab_alloc mm/slub.c:2805 [inline] kmem_cache_alloc+0xd8/0x300 mm/slub.c:2810 getname_flags fs/namei.c:138 [inline] getname_flags+0xd2/0x5b0 fs/namei.c:128 user_path_at_empty+0x2a/0x50 fs/namei.c:2632 user_path_at include/linux/namei.h:59 [inline] do_utimes+0x1bd/0x330 fs/utimes.c:121 rcu_lock_release include/linux/rcupdate.h:213 [inline] rcu_read_unlock include/linux/rcupdate.h:655 [inline] dput+0x1eb/0xdf0 fs/dcache.c:847 utimes_common.isra.0+0x5d0/0x5d0 fs/utimes.c:30 __secure_computing+0xb4/0x280 kernel/seccomp.c:950 __do_sys_utimensat fs/utimes.c:153 [inline] __se_sys_utimensat fs/utimes.c:137 [inline] __x64_sys_utimensat+0x19d/0x260 fs/utimes.c:137 syscall_slow_exit_work+0x5f0/0x5f0 include/linux/tracehook.h:75 do_compat_futimesat+0x260/0x260 fs/utimes.c:275 trace_hardirqs_off_caller+0x55/0x200 kernel/trace/trace_preemptirq.c:73 do_syscall_64+0xb6/0x5a0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x7f12c0bc1c42 Code: 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 85 f6 74 2d 48 63 ff 4c 63 d1 b8 18 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 06 f3 c3 0f 1f 40 00 48 8b 15 21 92 2b 00 f7 RSP: 002b:00007ffeab261028 EFLAGS: 00000206 ORIG_RAX: 0000000000000118 RAX: ffffffffffffffda RBX: 00007ffeab261ac0 RCX: 00007f12c0bc1c42 RDX: 0000000000000000 RSI: 00007ffeab261ac0 RDI: ffffffffffffff9c RBP: 0000000000000000 R08: 00005582e413f670 R09: 000000000000000e R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffeab2610e0 R13: 00005582e52918a0 R14: 00007ffeab2614e0 R15: 00007ffeab261acf