INFO: task kworker/0:3:5243 blocked for more than 143 seconds. Not tainted 6.2.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:3 state:D stack:22648 pid:5243 ppid:2 flags:0x00004000 Workqueue: events request_firmware_work_func Call Trace: context_switch kernel/sched/core.c:5244 [inline] __schedule+0xa20/0x27c0 kernel/sched/core.c:6555 schedule+0xda/0x1b0 kernel/sched/core.c:6631 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6690 __mutex_lock_common kernel/locking/mutex.c:679 [inline] __mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747 device_lock include/linux/device.h:831 [inline] ath9k_hif_usb_firmware_fail drivers/net/wireless/ath/ath9k/hif_usb.c:1133 [inline] ath9k_hif_usb_firmware_cb+0x3a9/0x530 drivers/net/wireless/ath/ath9k/hif_usb.c:1266 request_firmware_work_func+0x12c/0x230 drivers/base/firmware_loader/main.c:1107 process_one_work+0x9bf/0x1710 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:308 Showing all locks held in the system: 5 locks held by kworker/0:0/7: #0: ffff888108fd6138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888108fd6138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888108fd6138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888108fd6138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888108fd6138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888108fd6138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc9000007fda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 #2: ffff88810ea96190 (&dev->mutex){....}-{3:3} , at: device_lock include/linux/device.h:831 [inline] , at: hub_event+0x1bc/0x4810 drivers/usb/core/hub.c:5737 #3: ffff888108f40190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline] #3: ffff888108f40190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983 #4: ffff888109015118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline] #4: ffff888109015118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983 1 lock held by rcu_tasks_kthre/11: #0: ffffffff87a97090 (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: ffffffff87a97be0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6494 2 locks held by getty/2408: #0: ffff888110122098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244 #1: ffffc900000452f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef0/0x13e0 drivers/tty/n_tty.c:2177 5 locks held by kworker/1:3/5219: 3 locks held by kworker/0:3/5243: #0: ffff888100070d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888100070d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888100070d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888100070d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888100070d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888100070d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc90001a4fda8 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 #2: ffff88810e8de190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline] #2: ffff88810e8de190 (&dev->mutex){....}-{3:3}, at: ath9k_hif_usb_firmware_fail drivers/net/wireless/ath/ath9k/hif_usb.c:1133 [inline] #2: ffff88810e8de190 (&dev->mutex){....}-{3:3}, at: ath9k_hif_usb_firmware_cb+0x3a9/0x530 drivers/net/wireless/ath/ath9k/hif_usb.c:1266 5 locks held by kworker/1:5/5310: 5 locks held by kworker/1:6/5318: 3 locks held by udevd/9724: #0: ffff888110e94488 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:240 [inline] #0: ffff888110e94488 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x18a/0x790 fs/kernfs/file.c:280 #1: ffff888133882490 (kn->active#27){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:241 [inline] #1: ffff888133882490 (kn->active#27){++++}-{0:0}, at: kernfs_fop_read_iter+0x1ad/0x790 fs/kernfs/file.c:280 #2: ffff888108f40190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:836 [inline] #2: ffff888108f40190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:874 3 locks held by udevd/10426: #0: ffff88813b237c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:240 [inline] #0: ffff88813b237c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x18a/0x790 fs/kernfs/file.c:280 #1: ffff88810e8ae578 (kn->active#27){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:241 [inline] #1: ffff88810e8ae578 (kn->active#27){++++}-{0:0}, at: kernfs_fop_read_iter+0x1ad/0x790 fs/kernfs/file.c:280 #2: ffff888118840190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:836 [inline] #2: ffff888118840190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:874 3 locks held by udevd/10427: #0: ffff88811a0b4c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:240 [inline] #0: ffff88811a0b4c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x18a/0x790 fs/kernfs/file.c:280 #1: ffff88811d951748 (kn->active#27){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:241 [inline] #1: ffff88811d951748 (kn->active#27){++++}-{0:0}, at: kernfs_fop_read_iter+0x1ad/0x790 fs/kernfs/file.c:280 #2: ffff88810c21b190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:836 [inline] #2: ffff88810c21b190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:874 2 locks held by kworker/0:8/12765: #0: ffff888100072538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888100072538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888100072538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888100072538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888100072538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888100072538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc9000dbf7da8 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 3 locks held by udevd/15697: #0: ffff88811ba65088 (&of->mutex){+.+.}-{3:3}, at: kernfs_file_read_iter fs/kernfs/file.c:240 [inline] #0: ffff88811ba65088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_read_iter+0x18a/0x790 fs/kernfs/file.c:280 #1: ffff88811d48d3a8 (kn->active#27){++++}-{0:0}, at: kernfs_file_read_iter fs/kernfs/file.c:241 [inline] #1: ffff88811d48d3a8 (kn->active#27){++++}-{0:0}, at: kernfs_fop_read_iter+0x1ad/0x790 fs/kernfs/file.c:280 #2: ffff888119506190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:836 [inline] #2: ffff888119506190 (&dev->mutex){....}-{3:3}, at: read_descriptors+0x3c/0x2c0 drivers/usb/core/sysfs.c:874 5 locks held by kworker/0:6/22809: #0: ffff888108fd6138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888108fd6138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888108fd6138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline] #0: ffff888108fd6138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline] #0: ffff888108fd6138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline] #0: ffff888108fd6138 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260 #1: ffffc90001c2fda8 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264 #2: ffff88810e94e190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline] #2: ffff88810e94e190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1bc/0x4810 drivers/usb/core/hub.c:5737 #3: ffff888109016190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline] #3: ffff888109016190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983 #4: ffff888109012118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:831 [inline] #4: ffff888109012118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x76/0x530 drivers/base/dd.c:983 1 lock held by syz-executor.2/30175: #0: ffffffff87aa1d78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline] #0: ffffffff87aa1d78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x24b/0x770 kernel/rcu/tree_exp.h:946 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 26 Comm: khungtaskd Not tainted 6.2.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x32f/0x3c0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline] watchdog+0xc71/0xfc0 kernel/hung_task.c:377 kthread+0x2ea/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline] NMI backtrace for cpu 0 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline] NMI backtrace for cpu 0 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:112 [inline] NMI backtrace for cpu 0 skipped: idling at acpi_idle_do_entry+0x1fd/0x2a0 drivers/acpi/processor_idle.c:570