INFO: task syz-executor.0:5489 blocked for more than 143 seconds. Not tainted 6.8.0-rc6-syzkaller-gcf1182944c7c #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:25112 pid:5489 tgid:5489 ppid:5429 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5400 [inline] __schedule+0x17d1/0x49f0 kernel/sched/core.c:6727 __schedule_loop kernel/sched/core.c:6802 [inline] schedule+0x149/0x260 kernel/sched/core.c:6817 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874 __mutex_lock_common kernel/locking/mutex.c:684 [inline] __mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752 device_lock include/linux/device.h:990 [inline] usbdev_release+0x7a/0x7a0 drivers/usb/core/devio.c:1096 __fput+0x42b/0x8a0 fs/file_table.c:376 __do_sys_close fs/open.c:1554 [inline] __se_sys_close fs/open.c:1539 [inline] __x64_sys_close+0x7e/0x110 fs/open.c:1539 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77 RIP: 0033:0x7f0a0a47bc9a RSP: 002b:00007fff2d97f320 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f0a0a47bc9a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 0000000000000032 R08: 0000001b2f060000 R09: 00007f0a0a5abf8c R10: 00007fff2d97f470 R11: 0000000000000293 R12: 00007f0a0a0000c8 R13: ffffffffffffffff R14: 00007f0a0a000000 R15: 000000000001a74d Showing all locks held in the system: 5 locks held by kworker/1:1/27: #0: ffff88801caf9538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #0: ffff88801caf9538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #1: ffffc90000a2fd20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline] #1: ffffc90000a2fd20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706 #2: ffff888023a94190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline] #2: ffff888023a94190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x50f0 drivers/usb/core/hub.c:5811 #3: ffff888023b38510 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3169 [inline] #3: ffff888023b38510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5380 [inline] #3: ffff888023b38510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5623 [inline] #3: ffff888023b38510 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5783 [inline] #3: ffff888023b38510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x255f/0x50f0 drivers/usb/core/hub.c:5865 #4: ffff888022f89168 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5381 [inline] #4: ffff888022f89168 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5623 [inline] #4: ffff888022f89168 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5783 [inline] #4: ffff888022f89168 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x259d/0x50f0 drivers/usb/core/hub.c:5865 1 lock held by khungtaskd/29: #0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline] #0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline] #0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614 2 locks held by kworker/u4:2/42: #0: ffff8880b943c958 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559 #1: ffff8880b9428988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988 2 locks held by getty/4818: #0: ffff88802e8f80a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201 1 lock held by syz-executor.0/5489: #0: ffff888023a94190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline] #0: ffff888023a94190 (&dev->mutex){....}-{3:3}, at: usbdev_release+0x7a/0x7a0 drivers/usb/core/devio.c:1096 1 lock held by syz-executor.0/5807: #0: ffff888023a94190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline] #0: ffff888023a94190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x156/0x770 drivers/usb/core/devio.c:1051 1 lock held by syz-executor.0/5826: #0: ffff888023a94190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline] #0: ffff888023a94190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x156/0x770 drivers/usb/core/devio.c:1051 1 lock held by syz-executor.0/5845: #0: ffff888023a94190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline] #0: ffff888023a94190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x156/0x770 drivers/usb/core/devio.c:1051 1 lock held by syz-executor.0/5872: #0: ffff888023a94190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:990 [inline] #0: ffff888023a94190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x156/0x770 drivers/usb/core/devio.c:1051 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc6-syzkaller-gcf1182944c7c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0xfaf/0xff0 kernel/hung_task.c:379 kthread+0x2f1/0x390 kernel/kthread.c:388 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4506 Comm: klogd Not tainted 6.8.0-rc6-syzkaller-gcf1182944c7c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 RIP: 0033:0x7fb19263079d Code: e1 c5 f8 77 c3 0f 1f 84 00 00 00 00 00 89 f8 48 89 fa c5 f9 ef c0 25 ff 0f 00 00 3d e0 0f 00 00 0f 87 37 01 00 00 c5 fd 74 0f fd d7 c1 85 c0 74 5b f3 0f bc c0 c5 f8 77 c3 0f 1f 00 f3 0f bc RSP: 002b:00007ffc47464d48 EFLAGS: 00000283 RAX: 0000000000000634 RBX: 0000000000000002 RCX: 000055e73745f5c0 RDX: 00007fb192787634 RSI: 000055e73745a910 RDI: 00007fb192787634 RBP: 000055e73745a910 R08: 0000000000000002 R09: 0000000000000002 R10: 0000000000000008 R11: 0000000000000003 R12: 00007fb192787634 R13: 00007fb192786212 R14: 00007ffc47464e78 R15: 0000000000000000 FS: 00007fb192496380 GS: 0000000000000000