usb 1-1: Found UVC 0.00 device (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! ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6726 at drivers/media/mc/mc-entity.c:1147 media_create_pad_link+0x8a8/0xa14 drivers/media/mc/mc-entity.c:1147 Modules linked in: CPU: 1 UID: 0 PID: 6726 Comm: kworker/1:4 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Workqueue: usb_hub_wq hub_event pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : media_create_pad_link+0x8a8/0xa14 drivers/media/mc/mc-entity.c:1147 lr : media_create_pad_link+0x8a8/0xa14 drivers/media/mc/mc-entity.c:1147 sp : ffff80009cda6840 x29: ffff80009cda68a0 x28: ffff0000cd568880 x27: ffff0000cd568880 x26: 0000000000000003 x25: ffff0000cd568a08 x24: ffff0000cd5688c8 x23: 0000000000000001 x22: ffff0000cd568a90 x21: 0000000000000000 x20: dfff800000000000 x19: 0000000000000001 x18: 00000000ffffffff x17: ffff800093605000 x16: ffff8000805381bc x15: 0000000000000001 x14: 1fffe0001b5ad087 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001b5ad088 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000cdc89e80 x7 : ffff80008718cce0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000003 x3 : 0000000000000000 x2 : ffff0000cd568880 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: media_create_pad_link+0x8a8/0xa14 drivers/media/mc/mc-entity.c:1147 (P) uvc_mc_create_links drivers/media/usb/uvc/uvc_entity.c:50 [inline] uvc_mc_register_entities+0x628/0x874 drivers/media/usb/uvc/uvc_entity.c:151 uvc_register_chains+0x370/0x468 drivers/media/usb/uvc/uvc_driver.c:2129 uvc_probe+0x775c/0x8120 drivers/media/usb/uvc/uvc_driver.c:2268 usb_probe_interface+0x5a4/0xaac drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x3b4/0x944 drivers/base/dd.c:659 __driver_probe_device+0x180/0x2d4 drivers/base/dd.c:801 driver_probe_device+0x78/0x330 drivers/base/dd.c:831 __device_attach_driver+0x290/0x4e0 drivers/base/dd.c:959 bus_for_each_drv+0x220/0x2b4 drivers/base/bus.c:462 __device_attach+0x26c/0x388 drivers/base/dd.c:1031 device_initial_probe+0x24/0x34 drivers/base/dd.c:1080 bus_probe_device+0x178/0x240 drivers/base/bus.c:537 device_add+0x71c/0xa60 drivers/base/core.c:3689 usb_set_configuration+0x1640/0x1bac drivers/usb/core/message.c:2210 usb_generic_driver_probe+0x8c/0x144 drivers/usb/core/generic.c:250 usb_probe_device+0x1a4/0x348 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x3b4/0x944 drivers/base/dd.c:659 __driver_probe_device+0x180/0x2d4 drivers/base/dd.c:801 driver_probe_device+0x78/0x330 drivers/base/dd.c:831 __device_attach_driver+0x290/0x4e0 drivers/base/dd.c:959 bus_for_each_drv+0x220/0x2b4 drivers/base/bus.c:462 __device_attach+0x26c/0x388 drivers/base/dd.c:1031 device_initial_probe+0x24/0x34 drivers/base/dd.c:1080 bus_probe_device+0x178/0x240 drivers/base/bus.c:537 device_add+0x71c/0xa60 drivers/base/core.c:3689 usb_new_device+0x7f0/0x123c 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+0x211c/0x3c78 drivers/usb/core/hub.c:5952 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 53190 hardirqs last enabled at (53189): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (53189): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (53190): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:434 softirqs last enabled at (53072): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (53072): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (53063): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 ---[ end trace 0000000000000000 ]--- usb 1-1: Failed to create links for entity 1 usb 1-1: Failed to register entities (-22). usb 1-1: USB disconnect, device number 2 usb 1-1: new high-speed USB device number 5 using dummy_hcd usb 1-1: Using ep0 maxpacket: 8 usb 1-1: New USB device found, idVendor=2833, idProduct=0201, bcdDevice=2a.d5 usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? usb 1-1: string descriptor 0 read error: -71 usb 1-1: Found UVC 0.00 device (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! ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6726 at drivers/media/mc/mc-entity.c:1147 media_create_pad_link+0x8a8/0xa14 drivers/media/mc/mc-entity.c:1147 Modules linked in: CPU: 1 UID: 0 PID: 6726 Comm: kworker/1:4 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Workqueue: usb_hub_wq hub_event pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : media_create_pad_link+0x8a8/0xa14 drivers/media/mc/mc-entity.c:1147 lr : media_create_pad_link+0x8a8/0xa14 drivers/media/mc/mc-entity.c:1147 sp : ffff80009cda6840 x29: ffff80009cda68a0 x28: ffff0000c2c0c880 x27: ffff0000c2c0c880 x26: 0000000000000003 x25: ffff0000c2c0ca08 x24: ffff0000c2c0c8c8 x23: 0000000000000001 x22: ffff0000c2c0ca90 x21: 0000000000000000 x20: dfff800000000000 x19: 0000000000000001 x18: 1fffe00033776488 x17: ffff80010c40c000 x16: ffff8000805381bc x15: 0000000000000001 x14: 1fffe0001b4df087 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001b4df088 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000cdc89e80 x7 : ffff80008718cce0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000003 x3 : 0000000000000000 x2 : ffff0000c2c0c880 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: media_create_pad_link+0x8a8/0xa14 drivers/media/mc/mc-entity.c:1147 (P) uvc_mc_create_links drivers/media/usb/uvc/uvc_entity.c:50 [inline] uvc_mc_register_entities+0x628/0x874 drivers/media/usb/uvc/uvc_entity.c:151 uvc_register_chains+0x370/0x468 drivers/media/usb/uvc/uvc_driver.c:2129 uvc_probe+0x775c/0x8120 drivers/media/usb/uvc/uvc_driver.c:2268 usb_probe_interface+0x5a4/0xaac drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x3b4/0x944 drivers/base/dd.c:659 __driver_probe_device+0x180/0x2d4 drivers/base/dd.c:801 driver_probe_device+0x78/0x330 drivers/base/dd.c:831 __device_attach_driver+0x290/0x4e0 drivers/base/dd.c:959 bus_for_each_drv+0x220/0x2b4 drivers/base/bus.c:462 __device_attach+0x26c/0x388 drivers/base/dd.c:1031 device_initial_probe+0x24/0x34 drivers/base/dd.c:1080 bus_probe_device+0x178/0x240 drivers/base/bus.c:537 device_add+0x71c/0xa60 drivers/base/core.c:3689 usb_set_configuration+0x1640/0x1bac drivers/usb/core/message.c:2210 usb_generic_driver_probe+0x8c/0x144 drivers/usb/core/generic.c:250 usb_probe_device+0x1a4/0x348 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x3b4/0x944 drivers/base/dd.c:659 __driver_probe_device+0x180/0x2d4 drivers/base/dd.c:801 driver_probe_device+0x78/0x330 drivers/base/dd.c:831 __device_attach_driver+0x290/0x4e0 drivers/base/dd.c:959 bus_for_each_drv+0x220/0x2b4 drivers/base/bus.c:462 __device_attach+0x26c/0x388 drivers/base/dd.c:1031 device_initial_probe+0x24/0x34 drivers/base/dd.c:1080 bus_probe_device+0x178/0x240 drivers/base/bus.c:537 device_add+0x71c/0xa60 drivers/base/core.c:3689 usb_new_device+0x7f0/0x123c 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+0x211c/0x3c78 drivers/usb/core/hub.c:5952 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 59452 hardirqs last enabled at (59451): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (59451): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (59452): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:434 softirqs last enabled at (56910): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (56908): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- usb 1-1: Failed to create links for entity 1 usb 1-1: Failed to register entities (-22). usb 1-1: USB disconnect, device number 5 usb 1-1: new high-speed USB device number 6 using dummy_hcd usb 1-1: Using ep0 maxpacket: 8 usb 1-1: New USB device found, idVendor=2833, idProduct=0201, bcdDevice=2a.d5 usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? usb 1-1: string descriptor 0 read error: -71 usb 1-1: Found UVC 0.00 device (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! ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6726 at drivers/media/mc/mc-entity.c:1147 media_create_pad_link+0x8a8/0xa14 drivers/media/mc/mc-entity.c:1147 Modules linked in: CPU: 1 UID: 0 PID: 6726 Comm: kworker/1:4 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Workqueue: usb_hub_wq hub_event pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : media_create_pad_link+0x8a8/0xa14 drivers/media/mc/mc-entity.c:1147 lr : media_create_pad_link+0x8a8/0xa14 drivers/media/mc/mc-entity.c:1147 sp : ffff80009cda6840 x29: ffff80009cda68a0 x28: ffff0000c6234080 x27: ffff0000c6234080 x26: 0000000000000003 x25: ffff0000c6234208 x24: ffff0000c62340c8 x23: 0000000000000001 x22: ffff0000c6234290 x21: 0000000000000000 x20: dfff800000000000 x19: 0000000000000001 x18: 1fffe00033776488 x17: ffff80008f85e000 x16: ffff8000805381bc x15: 0000000000000001 x14: 1fffe0001bd4b487 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001bd4b488 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000cdc89e80 x7 : ffff80008718cce0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000003 x3 : 0000000000000000 x2 : ffff0000c6234080 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: media_create_pad_link+0x8a8/0xa14 drivers/media/mc/mc-entity.c:1147 (P) uvc_mc_create_links drivers/media/usb/uvc/uvc_entity.c:50 [inline] uvc_mc_register_entities+0x628/0x874 drivers/media/usb/uvc/uvc_entity.c:151 uvc_register_chains+0x370/0x468 drivers/media/usb/uvc/uvc_driver.c:2129 uvc_probe+0x775c/0x8120 drivers/media/usb/uvc/uvc_driver.c:2268 usb_probe_interface+0x5a4/0xaac drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x3b4/0x944 drivers/base/dd.c:659 __driver_probe_device+0x180/0x2d4 drivers/base/dd.c:801 driver_probe_device+0x78/0x330 drivers/base/dd.c:831 __device_attach_driver+0x290/0x4e0 drivers/base/dd.c:959 bus_for_each_drv+0x220/0x2b4 drivers/base/bus.c:462 __device_attach+0x26c/0x388 drivers/base/dd.c:1031 device_initial_probe+0x24/0x34 drivers/base/dd.c:1080 bus_probe_device+0x178/0x240 drivers/base/bus.c:537 device_add+0x71c/0xa60 drivers/base/core.c:3689 usb_set_configuration+0x1640/0x1bac drivers/usb/core/message.c:2210 usb_generic_driver_probe+0x8c/0x144 drivers/usb/core/generic.c:250 usb_probe_device+0x1a4/0x348 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x3b4/0x944 drivers/base/dd.c:659 __driver_probe_device+0x180/0x2d4 drivers/base/dd.c:801 driver_probe_device+0x78/0x330 drivers/base/dd.c:831 __device_attach_driver+0x290/0x4e0 drivers/base/dd.c:959 bus_for_each_drv+0x220/0x2b4 drivers/base/bus.c:462 __device_attach+0x26c/0x388 drivers/base/dd.c:1031 device_initial_probe+0x24/0x34 drivers/base/dd.c:1080 bus_probe_device+0x178/0x240 drivers/base/bus.c:537 device_add+0x71c/0xa60 drivers/base/core.c:3689 usb_new_device+0x7f0/0x123c 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+0x211c/0x3c78 drivers/usb/core/hub.c:5952 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 64702 hardirqs last enabled at (64701): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (64701): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (64702): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:434 softirqs last enabled at (61146): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (61144): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- usb 1-1: Failed to create links for entity 1 usb 1-1: Failed to register entities (-22). usb 1-1: USB disconnect, device number 6 usb 1-1: new high-speed USB device number 7 using dummy_hcd usb 1-1: Using ep0 maxpacket: 8 usb 1-1: New USB device found, idVendor=2833, idProduct=0201, bcdDevice=2a.d5 usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? usb 1-1: string descriptor 0 read error: -71 usb 1-1: Found UVC 0.00 device (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! ------------[ cut here ]------------ WARNING: CPU: 1 PID: 6726 at drivers/media/mc/mc-entity.c:1147 media_create_pad_link+0x8a8/0xa14 drivers/media/mc/mc-entity.c:1147 Modules linked in: CPU: 1 UID: 0 PID: 6726 Comm: kworker/1:4 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Workqueue: usb_hub_wq hub_event pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : media_create_pad_link+0x8a8/0xa14 drivers/media/mc/mc-entity.c:1147 lr : media_create_pad_link+0x8a8/0xa14 drivers/media/mc/mc-entity.c:1147 sp : ffff80009cda6840 x29: ffff80009cda68a0 x28: ffff0000dafaf080 x27: ffff0000dafaf080 x26: 0000000000000003 x25: ffff0000dafaf208 x24: ffff0000dafaf0c8 x23: 0000000000000001 x22: ffff0000dafaf290 x21: 0000000000000000 x20: dfff800000000000 x19: 0000000000000001 x18: 1fffe00033776488 x17: ffff80008f85e000 x16: ffff8000805381bc x15: 0000000000000001 x14: 1fffe00018cc6887 x13: 0000000000000000 x12: 0000000000000000 x11: ffff600018cc6888 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000cdc89e80 x7 : ffff80008718cce0 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000003 x3 : 0000000000000000 x2 : ffff0000dafaf080 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: media_create_pad_link+0x8a8/0xa14 drivers/media/mc/mc-entity.c:1147 (P) uvc_mc_create_links drivers/media/usb/uvc/uvc_entity.c:50 [inline] uvc_mc_register_entities+0x628/0x874 drivers/media/usb/uvc/uvc_entity.c:151 uvc_register_chains+0x370/0x468 drivers/media/usb/uvc/uvc_driver.c:2129 uvc_probe+0x775c/0x8120 drivers/media/usb/uvc/uvc_driver.c:2268 usb_probe_interface+0x5a4/0xaac drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x3b4/0x944 drivers/base/dd.c:659 __driver_probe_device+0x180/0x2d4 drivers/base/dd.c:801 driver_probe_device+0x78/0x330 drivers/base/dd.c:831 __device_attach_driver+0x290/0x4e0 drivers/base/dd.c:959 bus_for_each_drv+0x220/0x2b4 drivers/base/bus.c:462 __device_attach+0x26c/0x388 drivers/base/dd.c:1031 device_initial_probe+0x24/0x34 drivers/base/dd.c:1080 bus_probe_device+0x178/0x240 drivers/base/bus.c:537 device_add+0x71c/0xa60 drivers/base/core.c:3689 usb_set_configuration+0x1640/0x1bac drivers/usb/core/message.c:2210 usb_generic_driver_probe+0x8c/0x144 drivers/usb/core/generic.c:250 usb_probe_device+0x1a4/0x348 drivers/usb/core/driver.c:291 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x3b4/0x944 drivers/base/dd.c:659 __driver_probe_device+0x180/0x2d4 drivers/base/dd.c:801 driver_probe_device+0x78/0x330 drivers/base/dd.c:831 __device_attach_driver+0x290/0x4e0 drivers/base/dd.c:959 bus_for_each_drv+0x220/0x2b4 drivers/base/bus.c:462 __device_attach+0x26c/0x388 drivers/base/dd.c:1031 device_initial_probe+0x24/0x34 drivers/base/dd.c:1080 bus_probe_device+0x178/0x240 drivers/base/bus.c:537 device_add+0x71c/0xa60 drivers/base/core.c:3689 usb_new_device+0x7f0/0x123c 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+0x211c/0x3c78 drivers/usb/core/hub.c:5952 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 70486 hardirqs last enabled at (70485): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (70485): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (70486): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:434 softirqs last enabled at (66426): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (66424): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- usb 1-1: Failed to create links for entity 1 usb 1-1: Failed to register entities (-22). usb 1-1: USB disconnect, device number 7