usb 9-1: SerialNumber: syz usb 9-1: config 0 descriptor?? cm109 9-1:0.8: invalid payload size 0, expected 4 input: CM109 USB driver as /devices/platform/dummy_hcd.8/usb9/9-1/9-1:0.8/input/input5 ------------[ cut here ]------------ URB ffff88802612cb00 submitted while active WARNING: drivers/usb/core/urb.c:379 at usb_submit_urb+0x7b/0x18b0 drivers/usb/core/urb.c:379, CPU#0: kworker/0:7/8226 Modules linked in: CPU: 0 UID: 0 PID: 8226 Comm: kworker/0:7 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Workqueue: usb_hub_wq hub_event RIP: 0010:usb_submit_urb+0x7e/0x18b0 drivers/usb/core/urb.c:379 Code: 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 67 4d f6 fa 49 83 3e 00 74 40 e8 2c f2 8c fa 48 8d 3d 45 b1 e6 08 48 89 de <67> 48 0f b9 3a b8 f0 ff ff ff eb 11 e8 11 f2 8c fa eb 05 e8 0a f2 RSP: 0018:ffffc90003796b30 EFLAGS: 00010283 RAX: ffffffff87392924 RBX: ffff88802612cb00 RCX: 0000000000100000 RDX: ffffc9001b1d4000 RSI: ffff88802612cb00 RDI: ffffffff901fda70 RBP: 000000000000000f R08: ffffffff90127bf7 R09: 1ffffffff2024f7e R10: dffffc0000000000 R11: fffffbfff2024f7f R12: 0000000000000cc0 R13: ffff8880567d6848 R14: ffff88802612cb08 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888125442000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31722ff8 CR3: 000000007b286000 CR4: 00000000003526f0 Call Trace: cm109_input_open+0x1fb/0x480 drivers/input/misc/cm109.c:566 input_open_device+0x1f8/0x3b0 drivers/input/input.c:601 kbd_connect+0xf6/0x150 drivers/tty/vt/keyboard.c:1631 input_attach_handler drivers/input/input.c:1011 [inline] input_register_device+0xce0/0x1140 drivers/input/input.c:2395 cm109_usb_probe+0x1190/0x1690 drivers/input/misc/cm109.c:797 usb_probe_interface+0x659/0xc70 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x267/0xaf0 drivers/base/dd.c:721 __driver_probe_device+0x18c/0x320 drivers/base/dd.c:863 driver_probe_device+0x4f/0x240 drivers/base/dd.c:893 __device_attach_driver+0x279/0x430 drivers/base/dd.c:1021 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500 __device_attach+0x2c5/0x450 drivers/base/dd.c:1093 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1148 bus_probe_device+0x12a/0x220 drivers/base/bus.c:613 device_add+0x7b6/0xb70 drivers/base/core.c:3692 usb_set_configuration+0x1a87/0x2110 drivers/usb/core/message.c:2268 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250 usb_probe_device+0x1c4/0x3b0 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x267/0xaf0 drivers/base/dd.c:721 __driver_probe_device+0x18c/0x320 drivers/base/dd.c:863 driver_probe_device+0x4f/0x240 drivers/base/dd.c:893 __device_attach_driver+0x279/0x430 drivers/base/dd.c:1021 bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500 __device_attach+0x2c5/0x450 drivers/base/dd.c:1093 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1148 bus_probe_device+0x12a/0x220 drivers/base/bus.c:613 device_add+0x7b6/0xb70 drivers/base/core.c:3692 usb_new_device+0xa08/0x16f0 drivers/usb/core/hub.c:2695 hub_port_connect drivers/usb/core/hub.c:5567 [inline] hub_port_connect_change drivers/usb/core/hub.c:5707 [inline] port_event drivers/usb/core/hub.c:5871 [inline] hub_event+0x2a1c/0x4f30 drivers/usb/core/hub.c:5953 process_one_work kernel/workqueue.c:3278 [inline] process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3361 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3442 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ---------------- Code disassembly (best guess): 0: 89 f0 mov %esi,%eax 2: 48 c1 e8 03 shr $0x3,%rax 6: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) b: 74 08 je 0x15 d: 4c 89 f7 mov %r14,%rdi 10: e8 67 4d f6 fa call 0xfaf64d7c 15: 49 83 3e 00 cmpq $0x0,(%r14) 19: 74 40 je 0x5b 1b: e8 2c f2 8c fa call 0xfa8cf24c 20: 48 8d 3d 45 b1 e6 08 lea 0x8e6b145(%rip),%rdi # 0x8e6b16c 27: 48 89 de mov %rbx,%rsi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: b8 f0 ff ff ff mov $0xfffffff0,%eax 34: eb 11 jmp 0x47 36: e8 11 f2 8c fa call 0xfa8cf24c 3b: eb 05 jmp 0x42 3d: e8 .byte 0xe8 3e: 0a f2 or %dl,%dh