INFO: task kworker/1:5:4134 blocked for more than 143 seconds. Not tainted 6.0.0-rc4-syzkaller-00072-gb294c2bf4cfd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:5 state:D stack:21536 pid: 4134 ppid: 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5182 [inline] __schedule+0x93f/0x26f0 kernel/sched/core.c:6494 schedule+0xda/0x1b0 kernel/sched/core.c:6570 rwsem_down_write_slowpath+0x59c/0x11e0 kernel/locking/rwsem.c:1182 __down_write_common kernel/locking/rwsem.c:1297 [inline] __down_write_common kernel/locking/rwsem.c:1294 [inline] __down_write kernel/locking/rwsem.c:1306 [inline] down_write+0x135/0x150 kernel/locking/rwsem.c:1553 usb_deregister_dev+0xa5/0x320 drivers/usb/core/file.c:239 sisusb_disconnect+0x5a/0x200 drivers/usb/misc/sisusbvga/sisusb.c:3166 usb_unbind_interface+0x1d8/0x8e0 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:550 [inline] device_remove+0x11f/0x170 drivers/base/dd.c:542 __device_release_driver drivers/base/dd.c:1249 [inline] device_release_driver_internal+0x4a1/0x700 drivers/base/dd.c:1275 bus_remove_device+0x2e3/0x590 drivers/base/bus.c:529 device_del+0x4f3/0xc80 drivers/base/core.c:3704 usb_disable_device+0x356/0x7a0 drivers/usb/core/message.c:1419 usb_disconnect.cold+0x259/0x6ed drivers/usb/core/hub.c:2235 hub_port_connect drivers/usb/core/hub.c:5197 [inline] hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] port_event drivers/usb/core/hub.c:5653 [inline] hub_event+0x1f86/0x4610 drivers/usb/core/hub.c:5735 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 process_scheduled_works kernel/workqueue.c:2352 [inline] worker_thread+0x854/0x1080 kernel/workqueue.c:2438 kthread+0x2ea/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 INFO: task kworker/0:7:4586 blocked for more than 143 seconds. Not tainted 6.0.0-rc4-syzkaller-00072-gb294c2bf4cfd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:7 state:D stack:22168 pid: 4586 ppid: 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5182 [inline] __schedule+0x93f/0x26f0 kernel/sched/core.c:6494 schedule+0xda/0x1b0 kernel/sched/core.c:6570 rwsem_down_write_slowpath+0x59c/0x11e0 kernel/locking/rwsem.c:1182 __down_write_common kernel/locking/rwsem.c:1297 [inline] __down_write_common kernel/locking/rwsem.c:1294 [inline] __down_write kernel/locking/rwsem.c:1306 [inline] down_write+0x135/0x150 kernel/locking/rwsem.c:1553 usb_deregister_dev+0xa5/0x320 drivers/usb/core/file.c:239 chaoskey_disconnect+0xa5/0x280 drivers/usb/misc/chaoskey.c:234 usb_unbind_interface+0x1d8/0x8e0 drivers/usb/core/driver.c:458 device_remove drivers/base/dd.c:550 [inline] device_remove+0x11f/0x170 drivers/base/dd.c:542 __device_release_driver drivers/base/dd.c:1249 [inline] device_release_driver_internal+0x4a1/0x700 drivers/base/dd.c:1275 bus_remove_device+0x2e3/0x590 drivers/base/bus.c:529 device_del+0x4f3/0xc80 drivers/base/core.c:3704 usb_disable_device+0x356/0x7a0 drivers/usb/core/message.c:1419 usb_disconnect.cold+0x259/0x6ed drivers/usb/core/hub.c:2235 hub_port_connect drivers/usb/core/hub.c:5197 [inline] hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] port_event drivers/usb/core/hub.c:5653 [inline] hub_event+0x1f86/0x4610 drivers/usb/core/hub.c:5735 process_one_work+0x991/0x1610 kernel/workqueue.c:2289 worker_thread+0x665/0x1080 kernel/workqueue.c:2436 kthread+0x2ea/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 INFO: task syz-executor.5:28626 blocked for more than 143 seconds. Not tainted 6.0.0-rc4-syzkaller-00072-gb294c2bf4cfd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:29064 pid:28626 ppid: 1305 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:5182 [inline] __schedule+0x93f/0x26f0 kernel/sched/core.c:6494 schedule+0xda/0x1b0 kernel/sched/core.c:6570 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6629 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747 sisusb_open+0xb2/0x4d0 drivers/usb/misc/sisusbvga/sisusb.c:2396 usb_open+0x204/0x2e0 drivers/usb/core/file.c:48 chrdev_open+0x266/0x770 fs/char_dev.c:414 do_dentry_open+0x49c/0x1240 fs/open.c:878 do_open fs/namei.c:3557 [inline] path_openat+0x1c92/0x28f0 fs/namei.c:3691 do_filp_open+0x1b6/0x400 fs/namei.c:3718 do_sys_openat2+0x16d/0x4c0 fs/open.c:1311 do_sys_open fs/open.c:1327 [inline] __do_sys_openat fs/open.c:1343 [inline] __se_sys_openat fs/open.c:1338 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1338 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fa4a4fdc714 RSP: 002b:00007fa4a453bca0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fa4a514c1f0 RCX: 00007fa4a4fdc714 RDX: 0000000000000002 RSI: 00007fa4a453bd40 RDI: 00000000ffffff9c RBP: 00007fa4a453bd40 R08: 0000000000000000 R09: 000000000000000f R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 00007ffcd3e7146f R14: 00007fa4a453c300 R15: 0000000000022000 INFO: task syz-executor.1:28629 blocked for more than 144 seconds. Not tainted 6.0.0-rc4-syzkaller-00072-gb294c2bf4cfd #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28128 pid:28629 ppid: 19297 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5182 [inline] __schedule+0x93f/0x26f0 kernel/sched/core.c:6494 schedule+0xda/0x1b0 kernel/sched/core.c:6570 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6629 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747 sisusb_open+0xb2/0x4d0 drivers/usb/misc/sisusbvga/sisusb.c:2396 usb_open+0x204/0x2e0 drivers/usb/core/file.c:48 chrdev_open+0x266/0x770 fs/char_dev.c:414 do_dentry_open+0x49c/0x1240 fs/open.c:878 do_open fs/namei.c:3557 [inline] path_openat+0x1c92/0x28f0 fs/namei.c:3691 do_filp_open+0x1b6/0x400 fs/namei.c:3718 do_sys_openat2+0x16d/0x4c0 fs/open.c:1311 do_sys_open fs/open.c:1327 [inline] __do_sys_openat fs/open.c:1343 [inline] __se_sys_openat fs/open.c:1338 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1338 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fb60a922714 RSP: 002b:00007fb60a0e4ca0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fb60aa91f80 RCX: 00007fb60a922714 RDX: 0000000000000002 RSI: 00007fb60a0e4d40 RDI: 00000000ffffff9c RBP: 00007fb60a0e4d40 R08: 0000000000000000 R09: 000000000000000f R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002 R13: 00007ffcb12443ff R14: 00007fb60a0e5300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/11: #0: ffffffff87a94550 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/26: #0: ffffffff87a950a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6492 1 lock held by klogd/1169: #0: ffff8881f6937b18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:544 [inline] #0: ffff8881f6937b18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1355 [inline] #0: ffff8881f6937b18 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1653 [inline] #0: ffff8881f6937b18 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x236/0x26f0 kernel/sched/core.c:6411 2 locks held by getty/1239: #0: ffff8881009ff098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc900000432f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef0/0x13e0 drivers/tty/n_tty.c:2177 6 locks held by kworker/1:3/4090: #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260 #1: ffffc9000205fda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264 #2: ffff88810f0c6190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #2: ffff88810f0c6190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1bc/0x4610 drivers/usb/core/hub.c:5681 #3: ffff888139425190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #3: ffff888139425190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983 #4: ffff888139f7e118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #4: ffff888139f7e118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983 #5: ffffffff88424bf0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline] #5: ffffffff88424bf0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev+0x198/0x7e0 drivers/usb/core/file.c:156 6 locks held by kworker/1:5/4134: #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260 #1: ffffc9000229fda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264 #2: ffff88810f28e190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #2: ffff88810f28e190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1bc/0x4610 drivers/usb/core/hub.c:5681 #3: ffff888117dad190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #3: ffff888117dad190 (&dev->mutex){....}-{3:3}, at: usb_disconnect.cold+0x43/0x6ed drivers/usb/core/hub.c:2226 #4: ffff888109a0d118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #4: ffff888109a0d118 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1073 [inline] #4: ffff888109a0d118 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa0/0x700 drivers/base/dd.c:1272 #5: ffffffff88424bf0 (minor_rwsem){++++}-{3:3}, at: usb_deregister_dev+0xa5/0x320 drivers/usb/core/file.c:239 6 locks held by kworker/0:6/4214: #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260 #1: ffffc900027bfda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264 #2: ffff88810f2a6190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #2: ffff88810f2a6190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1bc/0x4610 drivers/usb/core/hub.c:5681 #3: ffff88813c54d190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #3: ffff88813c54d190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983 #4: ffff88813c692118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #4: ffff88813c692118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983 #5: ffffffff88424bf0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline] #5: ffffffff88424bf0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev+0x198/0x7e0 drivers/usb/core/file.c:156 6 locks held by kworker/0:7/4586: #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260 #1: ffffc9000ce07da8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264 #2: ffff88810f356190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #2: ffff88810f356190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1bc/0x4610 drivers/usb/core/hub.c:5681 #3: ffff888108b30190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #3: ffff888108b30190 (&dev->mutex){....}-{3:3}, at: usb_disconnect.cold+0x43/0x6ed drivers/usb/core/hub.c:2226 #4: ffff888109aab118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #4: ffff888109aab118 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1073 [inline] #4: ffff888109aab118 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xa0/0x700 drivers/base/dd.c:1272 #5: ffffffff88424bf0 (minor_rwsem){++++}-{3:3}, at: usb_deregister_dev+0xa5/0x320 drivers/usb/core/file.c:239 3 locks held by kworker/0:4/13784: 6 locks held by kworker/0:5/13787: #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888109c30d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260 #1: ffffc90004d1fda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264 #2: ffff88810f2be190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #2: ffff88810f2be190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1bc/0x4610 drivers/usb/core/hub.c:5681 #3: ffff88812ff5e190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #3: ffff88812ff5e190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983 #4: ffff88812ff5b118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:835 [inline] #4: ffff88812ff5b118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983 #5: ffffffff88424bf0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev drivers/usb/core/file.c:187 [inline] #5: ffffffff88424bf0 (minor_rwsem){++++}-{3:3}, at: usb_register_dev+0x198/0x7e0 drivers/usb/core/file.c:156 2 locks held by syz-executor.5/28625: #0: ffffffff88424bf0 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39 #1: ffff888115c628d0 (&(sisusb->lock)){+.+.}-{3:3}, at: sisusb_open+0xb2/0x4d0 drivers/usb/misc/sisusbvga/sisusb.c:2396 2 locks held by syz-executor.5/28626: #0: ffffffff88424bf0 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39 #1: ffff888115c628d0 (&(sisusb->lock)){+.+.}-{3:3}, at: sisusb_open+0xb2/0x4d0 drivers/usb/misc/sisusbvga/sisusb.c:2396 2 locks held by syz-executor.1/28629: #0: ffffffff88424bf0 (minor_rwsem){++++}-{3:3}, at: usb_open+0x24/0x2e0 drivers/usb/core/file.c:39 #1: ffff888115c628d0 (&(sisusb->lock)){+.+.}-{3:3}, at: sisusb_open+0xb2/0x4d0 drivers/usb/misc/sisusbvga/sisusb.c:2396 3 locks held by udevd/28643: #0: ffff888111e66488 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:253 [inline] #0: ffff888111e66488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x189/0x710 fs/kernfs/file.c:300 #1: ffff88813d2a81d8 (kn->active#51){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:254 [inline] #1: ffff88813d2a81d8 (kn->active#51){++++}-{0:0}, at: kernfs_fop_read_iter+0x1ac/0x710 fs/kernfs/file.c:300 #2: ffff888139425190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:840 [inline] #2: ffff888139425190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:873 3 locks held by udevd/29705: #0: ffff88813f799488 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:253 [inline] #0: ffff88813f799488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x189/0x710 fs/kernfs/file.c:300 #1: ffff88813fc2b830 (kn->active#51){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:254 [inline] #1: ffff88813fc2b830 (kn->active#51){++++}-{0:0}, at: kernfs_fop_read_iter+0x1ac/0x710 fs/kernfs/file.c:300 #2: ffff88812ff5e190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:840 [inline] #2: ffff88812ff5e190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:873 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 26 Comm: khungtaskd Not tainted 6.0.0-rc4-syzkaller-00072-gb294c2bf4cfd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x46/0x14f lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x206/0x250 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline] watchdog+0xc18/0xf50 kernel/hung_task.c:369 kthread+0x2ea/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 1299 Comm: syz-fuzzer Not tainted 6.0.0-rc4-syzkaller-00072-gb294c2bf4cfd #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022 RIP: 0010:write_comp_data+0x3c/0x90 kernel/kcov.c:229 Code: 01 00 00 49 89 f8 65 48 8b 14 25 c0 6e 02 00 a9 00 01 ff 00 74 0e 85 f6 74 59 8b 82 bc 14 00 00 85 c0 74 4f 8b 82 98 14 00 00 <83> f8 03 75 44 48 8b 82 a0 14 00 00 8b 92 9c 14 00 00 48 8b 38 48 RSP: 0018:ffffc9000109f6d8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff888110ad3ac0 RCX: ffffffff85124ff7 RDX: ffff8881110c1c80 RSI: 0000000000000000 RDI: 0000000000000005 RBP: ffff888110ad3800 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffff88813ad43140 R13: 0000000000000001 R14: ffff88811c100c00 R15: 0000000000000000 FS: 000000c0002eac90(0000) GS:ffff8881f6900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8fa0ed3000 CR3: 000000010f9af000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __ip_queue_xmit+0x647/0x1be0 net/ipv4/ip_output.c:525 __tcp_transmit_skb+0x193e/0x3660 net/ipv4/tcp_output.c:1402 __tcp_send_ack.part.0+0x3a7/0x760 net/ipv4/tcp_output.c:3981 __tcp_send_ack net/ipv4/tcp_output.c:3987 [inline] tcp_send_ack+0x7d/0xa0 net/ipv4/tcp_output.c:3987 __tcp_ack_snd_check+0x156/0x9c0 net/ipv4/tcp_input.c:5512 tcp_ack_snd_check net/ipv4/tcp_input.c:5558 [inline] tcp_rcv_established+0x90e/0x20e0 net/ipv4/tcp_input.c:5996 tcp_v4_do_rcv+0x66c/0x980 net/ipv4/tcp_ipv4.c:1661 sk_backlog_rcv include/net/sock.h:1100 [inline] __release_sock+0x13a/0x2a0 net/core/sock.c:2852 release_sock+0x54/0x1b0 net/core/sock.c:3408 tcp_recvmsg+0x11e/0x620 net/ipv4/tcp.c:2671 inet_recvmsg+0x110/0x5d0 net/ipv4/af_inet.c:850 sock_recvmsg_nosec net/socket.c:995 [inline] sock_recvmsg net/socket.c:1013 [inline] sock_recvmsg net/socket.c:1009 [inline] sock_read_iter+0x344/0x470 net/socket.c:1086 call_read_iter include/linux/fs.h:2181 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x7f6/0x930 fs/read_write.c:470 ksys_read+0x1e8/0x250 fs/read_write.c:607 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x49dfbb Code: e8 aa 4b fc ff eb 88 cc cc cc cc cc cc cc cc e8 bb 8f fc ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 RSP: 002b:000000c0003cd9b8 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 000000c00001e000 RCX: 000000000049dfbb RDX: 0000000000001000 RSI: 000000c000501000 RDI: 0000000000000006 RBP: 000000c0003cda08 R08: 000000000000097f R09: 00007ffec99ea080 R10: 00007ffec99ea090 R11: 0000000000000212 R12: 000000c0003cd8f8 R13: 0000000000000000 R14: 000000c000092000 R15: 000000000000000f