INFO: task syz-executor.1:31388 blocked for more than 143 seconds. Not tainted 6.1.76-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:0 pid:31388 ppid:4264 flags:0x0000000d Call trace: __switch_to+0x320/0x754 arch/arm64/kernel/process.c:553 context_switch kernel/sched/core.c:5245 [inline] __schedule+0xee4/0x1c98 kernel/sched/core.c:6558 schedule+0xc4/0x170 kernel/sched/core.c:6634 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6693 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799 blkdev_put+0xec/0x6e0 block/bdev.c:913 blkdev_close+0x58/0x94 block/fops.c:514 __fput+0x30c/0x7bc fs/file_table.c:320 ____fput+0x20/0x30 fs/file_table.c:348 task_work_run+0x240/0x2f0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2148/0x3474 arch/arm64/kernel/signal.c:1132 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffff800015a14ef0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:516 1 lock held by rcu_tasks_trace/13: #0: ffff800015a156f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:516 1 lock held by khungtaskd/28: #0: ffff800015a14d20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:317 2 locks held by getty/3982: #0: ffff0000d6456098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff80001bcd02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1214 drivers/tty/n_tty.c:2188 1 lock held by udevd/4247: #0: ffff0000ce7324c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x12c/0x8ec block/bdev.c:815 4 locks held by udevd/4482: #0: ffff0000d98f21c8 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xac/0xc44 fs/seq_file.c:182 #1: ffff0000dbcd7488 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x58/0x384 fs/kernfs/file.c:150 #2: ffff0001244f63a8 (kn->active#28){.+.+}-{0:0}, at: kernfs_seq_start+0x74/0x384 fs/kernfs/file.c:151 #3: ffff0000c344d190 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:841 [inline] #3: ffff0000c344d190 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x30/0xac drivers/usb/core/sysfs.c:141 5 locks held by kworker/1:10/18766: #0: ffff0001b4390598 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2c/0x44 kernel/sched/core.c:537 #1: ffff0001b437db88 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x308/0x618 kernel/sched/psi.c:988 #2: ffff0001b437e758 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x108/0x214 kernel/time/timer.c:999 #3: ffff800019abc118 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x14c/0x7a8 lib/debugobjects.c:706 #4: ffff800019abf4d8 (&obj_hash[i].lock){-.-.}-{2:2}, at: __debug_check_no_obj_freed lib/debugobjects.c:1009 [inline] #4: ffff800019abf4d8 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_check_no_obj_freed+0x14c/0x51c lib/debugobjects.c:1052 3 locks held by kworker/1:11/26035: #0: ffff0000c0020d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265 #1: ffff8000223f7c20 ((work_completion)(&fw_work->work)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267 #2: ffff8000158c4710 (umhelper_sem){++++}-{3:3}, at: usermodehelper_read_lock_wait+0x138/0x244 kernel/umh.c:250 1 lock held by syz-executor.1/31388: #0: ffff0000ce7324c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xec/0x6e0 block/bdev.c:913 1 lock held by syz-executor.1/32009: #0: ffff0000ce7324c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x12c/0x8ec block/bdev.c:815 5 locks held by kworker/1:14/1693: #0: ffff0000c46a4d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x664/0x1404 kernel/workqueue.c:2265 #1: ffff800023847c20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x1404 kernel/workqueue.c:2267 #2: ffff0000d18ba190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:836 [inline] #2: ffff0000d18ba190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1ac/0x4360 drivers/usb/core/hub.c:5758 #3: ffff0000c344d190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:836 [inline] #3: ffff0000c344d190 (&dev->mutex){....}-{3:3}, at: usb_disconnect+0xec/0x7b0 drivers/usb/core/hub.c:2237 #4: ffff0000e011b118 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:836 [inline] #4: ffff0000e011b118 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1080 [inline] #4: ffff0000e011b118 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xbc/0x724 drivers/base/dd.c:1283 1 lock held by syz-executor.1/3589: #0: ffff0000ce7324c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x12c/0x8ec block/bdev.c:815 =============================================