INFO: task kworker/1:2:2513 blocked for more than 143 seconds. Not tainted 6.5.0-rc4-next-20230804-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:2 state:D stack:26768 pid:2513 ppid:2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:5382 [inline] __schedule+0xee1/0x59f0 kernel/sched/core.c:6711 schedule+0xe7/0x1b0 kernel/sched/core.c:6787 usb_kill_urb.part.0+0x1c6/0x250 drivers/usb/core/urb.c:728 usb_kill_urb+0x83/0xa0 drivers/usb/core/urb.c:717 usb_start_wait_urb+0x251/0x4c0 drivers/usb/core/message.c:65 usb_internal_control_msg drivers/usb/core/message.c:103 [inline] usb_control_msg+0x327/0x4a0 drivers/usb/core/message.c:154 usb_get_descriptor+0xc1/0x1b0 drivers/usb/core/message.c:794 usb_get_device_descriptor+0x85/0xf0 drivers/usb/core/message.c:1073 hub_port_init+0x92c/0x3850 drivers/usb/core/hub.c:5007 hub_port_connect drivers/usb/core/hub.c:5374 [inline] hub_port_connect_change drivers/usb/core/hub.c:5589 [inline] port_event drivers/usb/core/hub.c:5749 [inline] hub_event+0x2e34/0x5230 drivers/usb/core/hub.c:5831 process_one_work+0xaa2/0x16f0 kernel/workqueue.c:2603 worker_thread+0x687/0x1110 kernel/workqueue.c:2754 kthread+0x33a/0x430 kernel/kthread.c:389 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.5.0-rc4-next-20230804-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x277/0x380 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x2ac/0x310 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+0xfab/0x1230 kernel/hung_task.c:379 kthread+0x33a/0x430 kernel/kthread.c:389 ret_from_fork+0x2c/0x70 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 5036 Comm: strace-static-x Not tainted 6.5.0-rc4-next-20230804-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 RIP: 0010:ptrace_do_wait kernel/exit.c:1496 [inline] RIP: 0010:__do_wait+0x2f2/0x870 kernel/exit.c:1605 Code: 48 89 f8 48 c1 e8 03 42 80 3c 20 00 0f 85 76 04 00 00 48 8b 83 f8 05 00 00 48 8d 98 08 fa ff ff 49 39 c7 74 2b e8 2e 23 38 00 <48> 89 da be 01 00 00 00 48 89 ef e8 6e 7f ff ff 31 ff 41 89 c6 89 RSP: 0018:ffffc90003a4fc50 EFLAGS: 00000293 RAX: 0000000000000000 RBX: ffff88807b3e9dc0 RCX: 0000000000000000 RDX: ffff888023978000 RSI: ffffffff814e9f72 RDI: ffff888014b985f8 RBP: ffffc90003a4fcf8 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff888023978000 R14: 0000000000000000 R15: ffff8880239785e8 FS: 00000000020a53c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd616390b40 CR3: 0000000024d9c000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_wait+0x1cb/0x4c0 kernel/exit.c:1634 kernel_wait4+0x16d/0x280 kernel/exit.c:1794 __do_sys_wait4+0x15b/0x170 kernel/exit.c:1822 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x4d6ad6 Code: 00 00 00 90 31 c9 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 49 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 11 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 90 48 83 ec 28 89 54 24 14 48 89 74 24 RSP: 002b:00007fff86922978 EFLAGS: 00000246 ORIG_RAX: 000000000000003d RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00000000004d6ad6 RDX: 0000000040000001 RSI: 00007fff8692299c RDI: 00000000ffffffff RBP: 00000000000013b0 R08: 0000000000000000 R09: 00000000000003b0 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000020ac400 R13: 00007fff8692299c R14: 00000000020a6ce0 R15: 000000000063f160 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.115 msecs