INFO: task syz-executor.0:4418 blocked for more than 143 seconds. Not tainted 5.15.111-syzkaller-00372-gb0ece631f84a #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack: 0 pid: 4418 ppid: 4327 flags:0x00000001 Call trace: __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518 context_switch kernel/sched/core.c:5026 [inline] __schedule+0xf10/0x1e38 kernel/sched/core.c:6372 schedule+0x11c/0x1c8 kernel/sched/core.c:6455 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6514 __mutex_lock_common+0xba0/0x2154 kernel/locking/mutex.c:669 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743 device_lock include/linux/device.h:760 [inline] usbdev_open+0x13c/0x6ec drivers/usb/core/devio.c:1030 chrdev_open+0x3e8/0x4fc fs/char_dev.c:414 do_dentry_open+0x780/0xed8 fs/open.c:826 vfs_open+0x7c/0x90 fs/open.c:956 do_open fs/namei.c:3538 [inline] path_openat+0x1f28/0x26f0 fs/namei.c:3672 do_filp_open+0x1a8/0x3b4 fs/namei.c:3699 do_sys_openat2+0x128/0x3d8 fs/open.c:1211 do_sys_open fs/open.c:1227 [inline] __do_sys_openat fs/open.c:1243 [inline] __se_sys_openat fs/open.c:1238 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1238 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffff800014aa16e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:268 2 locks held by kworker/u4:3/153: #0: ffff0001b4830d18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2c/0x44 kernel/sched/core.c:475 #1: ffff0001b481ec48 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3dc/0x66c kernel/sched/psi.c:882 2 locks held by getty/3722: #0: ffff0000d42f3098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340 #1: ffff80001a28b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1200 drivers/tty/n_tty.c:2147 5 locks held by kworker/0:3/3989: #0: ffff0000c285f538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2280 #1: ffff80001ce67c00 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2282 #2: ffff0000cd23f220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #2: ffff0000cd23f220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c8/0x48c4 drivers/usb/core/hub.c:5676 #3: ffff0000c89db220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #3: ffff0000c89db220 (&dev->mutex){....}-{3:3}, at: __device_attach+0x90/0x480 drivers/base/dd.c:954 #4: ffff0000c0e041a8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #4: ffff0000c0e041a8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x90/0x480 drivers/base/dd.c:954 4 locks held by udevd/4322: #0: ffff0000da3de540 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xac/0xc44 fs/seq_file.c:182 #1: ffff0000cfd73888 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x58/0x3a0 fs/kernfs/file.c:112 #2: ffff0000c19e71d8 (kn->active#76){.+.+}-{0:0}, at: kernfs_seq_start+0x74/0x3a0 fs/kernfs/file.c:113 #3: ffff0000c89db220 (&dev->mutex){....}-{3:3}, at: device_lock_interruptible include/linux/device.h:765 [inline] #3: ffff0000c89db220 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x30/0xac drivers/usb/core/sysfs.c:141 1 lock held by syz-executor.0/4418: #0: ffff0000cd23f220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #0: ffff0000cd23f220 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x13c/0x6ec drivers/usb/core/devio.c:1030 1 lock held by syz-executor.0/4697: #0: ffff0000cd23f220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #0: ffff0000cd23f220 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x13c/0x6ec drivers/usb/core/devio.c:1030 1 lock held by syz-executor.0/4713: #0: ffff0000cd23f220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #0: ffff0000cd23f220 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x13c/0x6ec drivers/usb/core/devio.c:1030 =============================================