usb 1-1: SerialNumber: syz
usb 1-1: Found UVC 7.ff device syz (174f:5212)
uvcvideo 1-1:6.220: Entity type for entity Output 4 was not initialized!
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4405 at drivers/media/mc/mc-entity.c:1069 media_create_pad_link+0x888/0xa14 drivers/media/mc/mc-entity.c:1069
Modules linked in:
CPU: 1 PID: 4405 Comm: kworker/1:6 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026
Workqueue: usb_hub_wq hub_event
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : media_create_pad_link+0x888/0xa14 drivers/media/mc/mc-entity.c:1069
lr : media_create_pad_link+0x888/0xa14 drivers/media/mc/mc-entity.c:1069
sp : ffff800020de68e0
x29: ffff800020de6940 x28: ffff0000c324a880 x27: ffff0000dc446080
x26: 0000000000000003 x25: ffff0000c324a9d0 x24: 0000000000000002
x23: 0000000000000000 x22: 0000000000000002 x21: 0000000000000000
x20: dfff800000000000 x19: ffff0000c324aa00 x18: ffff800011b9bf60
x17: ffff80001835a000 x16: ffff8000082eef80 x15: ffff800017e3b000
x14: 0000000000000001 x13: 1fffe0001bac9497 x12: 0000000000100000
x11: 00000000000fffff x10: ffff800031d23000 x9 : ffff80000e0dcfc8
x8 : 0000000000100000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff80001867e7d0 x4 : 0000000000000003 x3 : 0000000000000000
x2 : ffff0000c324a880 x1 : 0000000000000000 x0 : 0000000000000002
Call trace:
 media_create_pad_link+0x888/0xa14 drivers/media/mc/mc-entity.c:1069
 uvc_mc_create_links drivers/media/usb/uvc/uvc_entity.c:50 [inline]
 uvc_mc_register_entities+0x624/0x88c drivers/media/usb/uvc/uvc_entity.c:151
 uvc_register_chains+0x370/0x468 drivers/media/usb/uvc/uvc_driver.c:2094
 uvc_probe+0x78b0/0x816c drivers/media/usb/uvc/uvc_driver.c:2239
 usb_probe_interface+0x514/0x99c drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x39c/0xacc drivers/base/dd.c:639
 __driver_probe_device+0x180/0x310 drivers/base/dd.c:785
 driver_probe_device+0x78/0x324 drivers/base/dd.c:815
 __device_attach_driver+0x290/0x4d4 drivers/base/dd.c:943
 bus_for_each_drv+0x154/0x1e4 drivers/base/bus.c:429
 __device_attach+0x2ac/0x3dc drivers/base/dd.c:1015
 device_initial_probe+0x24/0x34 drivers/base/dd.c:1064
 bus_probe_device+0xbc/0x1c4 drivers/base/bus.c:489
 device_add+0xb04/0xf90 drivers/base/core.c:3697
 usb_set_configuration+0x1594/0x1b04 drivers/usb/core/message.c:2223
 usb_generic_driver_probe+0x8c/0x144 drivers/usb/core/generic.c:238
 usb_probe_device+0x120/0x258 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x39c/0xacc drivers/base/dd.c:639
 __driver_probe_device+0x180/0x310 drivers/base/dd.c:785
 driver_probe_device+0x78/0x324 drivers/base/dd.c:815
 __device_attach_driver+0x290/0x4d4 drivers/base/dd.c:943
 bus_for_each_drv+0x154/0x1e4 drivers/base/bus.c:429
 __device_attach+0x2ac/0x3dc drivers/base/dd.c:1015
 device_initial_probe+0x24/0x34 drivers/base/dd.c:1064
 bus_probe_device+0xbc/0x1c4 drivers/base/bus.c:489
 device_add+0xb04/0xf90 drivers/base/core.c:3697
 usb_new_device+0x7f8/0x11e4 drivers/usb/core/hub.c:2659
 hub_port_connect drivers/usb/core/hub.c:5517 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5657 [inline]
 port_event drivers/usb/core/hub.c:5817 [inline]
 hub_event+0x2248/0x3dd8 drivers/usb/core/hub.c:5899
 process_one_work+0x7f8/0x13a4 kernel/workqueue.c:2292
 worker_thread+0x8c4/0xfec kernel/workqueue.c:2439
 kthread+0x250/0x2d8 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850
irq event stamp: 376574
hardirqs last  enabled at (376573): [<ffff800011b1ef94>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline]
hardirqs last  enabled at (376573): [<ffff800011b1ef94>] _raw_spin_unlock_irqrestore+0x48/0xac kernel/locking/spinlock.c:194
hardirqs last disabled at (376574): [<ffff800011a33e5c>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:405
softirqs last  enabled at (376570): [<ffff8000081ac394>] softirq_handle_end kernel/softirq.c:439 [inline]
softirqs last  enabled at (376570): [<ffff8000081ac394>] handle_softirqs+0xaec/0xc60 kernel/softirq.c:624
softirqs last disabled at (376553): [<ffff800008020164>] __do_softirq+0x14/0x20 kernel/softirq.c:630
---[ end trace 0000000000000000 ]---
usb 1-1: Failed to create links for entity 4
usb 1-1: Failed to register entities (-22).
usb 1-1: USB disconnect, device number 16