syzbot

usb 1-1: Found UVC 0.00 device <unnamed> (2833:0201)
uvcvideo 1-1:0.0: Entity type for entity Output 1 was not initialized!
uvcvideo 1-1:0.0: Entity type for entity Input 1 was not initialized!
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WARNING: CPU: 0 PID: 5945 at drivers/media/mc/mc-entity.c:1147 media_create_pad_link+0xa22/0xba0 drivers/media/mc/mc-entity.c:1147
Modules linked in:
CPU: 0 UID: 0 PID: 5945 Comm: kworker/0:4 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:media_create_pad_link+0xa22/0xba0 drivers/media/mc/mc-entity.c:1147
Code: ff ff eb dc e8 2f fa f8 f9 90 0f 0b 90 b8 ea ff ff ff eb cc e8 1f fa f8 f9 90 0f 0b 90 b8 ea ff ff ff eb bc e8 0f fa f8 f9 90 <0f> 0b 90 b8 ea ff ff ff eb ac e8 ff f9 f8 f9 90 0f 0b 90 b8 ea ff
RSP: 0018:ffffc9000401e9c0 EFLAGS: 00010293
RAX: ffffffff87c6b381 RBX: 0000000000000000 RCX: ffff88807e46da00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000003 R09: 1ffff11006426087
R10: dffffc0000000000 R11: ffffed1006426088 R12: ffff888030cce080
R13: ffff888030cce080 R14: 1ffff11006199c19 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888125c13000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f86ddb7a0f5 CR3: 00000000773b0000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 uvc_mc_create_links drivers/media/usb/uvc/uvc_entity.c:50 [inline]
 uvc_mc_register_entities+0x745/0x9e0 drivers/media/usb/uvc/uvc_entity.c:151
 uvc_register_chains+0x3cf/0x4c0 drivers/media/usb/uvc/uvc_driver.c:2129
 uvc_probe+0x9f8d/0xaaf0 drivers/media/usb/uvc/uvc_driver.c:2268
 usb_probe_interface+0x668/0xc30 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x26a/0x9e0 drivers/base/dd.c:659
 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:801
 driver_probe_device+0x4f/0x430 drivers/base/dd.c:831
 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:959
 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462
 __device_attach+0x2b8/0x400 drivers/base/dd.c:1031
 bus_probe_device+0x185/0x260 drivers/base/bus.c:537
 device_add+0x7b6/0xb50 drivers/base/core.c:3689
 usb_set_configuration+0x1a87/0x20e0 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
 usb_probe_device+0x1c4/0x390 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x26a/0x9e0 drivers/base/dd.c:659
 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:801
 driver_probe_device+0x4f/0x430 drivers/base/dd.c:831
 __device_attach_driver+0x2ce/0x530 drivers/base/dd.c:959
 bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462
 __device_attach+0x2b8/0x400 drivers/base/dd.c:1031
 bus_probe_device+0x185/0x260 drivers/base/bus.c:537
 device_add+0x7b6/0xb50 drivers/base/core.c:3689
 usb_new_device+0xa39/0x16f0 drivers/usb/core/hub.c:2694
 hub_port_connect drivers/usb/core/hub.c:5566 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]
 port_event drivers/usb/core/hub.c:5870 [inline]
 hub_event+0x2958/0x4a20 drivers/usb/core/hub.c:5952
 process_one_work kernel/workqueue.c:3236 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x70e/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x439/0x7d0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>