Extracting prog: 2m50.326243574s
Minimizing prog: 3m37.109929863s
Simplifying prog options: 0s
Extracting C: 6m49.330374596s
Simplifying C: 11m18.947114598s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x34, &(0x7f00000004c0)=ANY=[@ANYBLOB="1201000092e1300833280102d52a0000000109022200010000000009040000000e0100000824030100021007082402010003fff50a52b47854298d091c5a5e3973e313a8e492051847d137e5b5e5b15905c5c19edd"], 0x0)

program crashed: WARNING in media_create_pad_link
single: successfully extracted reproducer
found reproducer with 1 syscalls
minimizing guilty program
testing program (duration=1m5.420593206s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x34, 0x0, 0x0)

program did not crash
testing program (duration=1m5.420593206s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
detailed listing:
executing program 0:
syz_usb_connect(0x0, 0x34, &(0x7f00000004c0)=ANY=[@ANYBLOB], 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=1m5.420593206s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
program crashed: WARNING in media_create_pad_link
simplifying C reproducer
testing compiled C program (duration=1m5.420593206s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
program crashed: WARNING in media_create_pad_link
testing compiled C program (duration=1m5.420593206s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
program crashed: WARNING in media_create_pad_link
testing compiled C program (duration=1m5.420593206s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
program crashed: WARNING in media_create_pad_link
testing compiled C program (duration=1m5.420593206s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
program crashed: WARNING in media_create_pad_link
testing compiled C program (duration=1m5.420593206s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
program crashed: WARNING in media_create_pad_link
testing compiled C program (duration=1m5.420593206s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
program crashed: WARNING in media_create_pad_link
testing compiled C program (duration=1m5.420593206s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
program crashed: WARNING in media_create_pad_link
testing compiled C program (duration=1m5.420593206s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_usb_connect
program crashed: WARNING in media_create_pad_link
reproducing took 24m35.713696555s
repro crashed as (corrupted=false):
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 <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!
------------[ cut here ]------------
WARNING: CPU: 1 PID: 24 at drivers/media/mc/mc-entity.c:1147 media_create_pad_link+0xa30/0xbb0 drivers/media/mc/mc-entity.c:1147
Modules linked in:
CPU: 1 UID: 0 PID: 24 Comm: kworker/1:0 Not tainted 6.15.0-rc3-syzkaller-00008-ga33b5a08cbbd #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:media_create_pad_link+0xa30/0xbb0 drivers/media/mc/mc-entity.c:1147
Code: ff ff eb dd e8 01 17 87 f9 90 0f 0b 90 b8 ea ff ff ff eb cd e8 f1 16 87 f9 90 0f 0b 90 b8 ea ff ff ff eb bd e8 e1 16 87 f9 90 <0f> 0b 90 b8 ea ff ff ff eb ad e8 d1 16 87 f9 90 0f 0b 90 b8 ea ff
RSP: 0018:ffffc900001e6938 EFLAGS: 00010293
RAX: ffffffff883ba63f RBX: 0000000000000000 RCX: ffff88801d6e8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff883b9d31 R09: 1ffff11028ff0885
R10: dffffc0000000000 R11: ffffed1028ff0886 R12: dffffc0000000000
R13: ffff888028d4a080 R14: 0000000000000000 R15: ffff888028d4a0c8
FS:  0000000000000000(0000) GS:ffff88812509a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055735c9a1788 CR3: 000000000eb38000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 uvc_mc_create_links drivers/media/usb/uvc/uvc_entity.c:50 [inline]
 uvc_mc_register_entities+0x733/0xa00 drivers/media/usb/uvc/uvc_entity.c:151
 uvc_register_chains+0x3d4/0x4c0 drivers/media/usb/uvc/uvc_driver.c:2143
 uvc_probe+0x9c19/0xa6f0 drivers/media/usb/uvc/uvc_driver.c:2279
 usb_probe_interface+0x650/0xbc0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x2b9/0xad0 drivers/base/dd.c:658
 __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
 driver_probe_device+0x50/0x430 drivers/base/dd.c:830
 __device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958
 bus_for_each_drv+0x258/0x2e0 drivers/base/bus.c:462
 __device_attach+0x341/0x530 drivers/base/dd.c:1030
 bus_probe_device+0x189/0x260 drivers/base/bus.c:537
 device_add+0x856/0xbf0 drivers/base/core.c:3666
 usb_set_configuration+0x1999/0x1fe0 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0x88/0x140 drivers/usb/core/generic.c:250
 usb_probe_device+0x1b8/0x380 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x2b9/0xad0 drivers/base/dd.c:658
 __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
 driver_probe_device+0x50/0x430 drivers/base/dd.c:830
 __device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958
 bus_for_each_drv+0x258/0x2e0 drivers/base/bus.c:462
 __device_attach+0x341/0x530 drivers/base/dd.c:1030
 bus_probe_device+0x189/0x260 drivers/base/bus.c:537
 device_add+0x856/0xbf0 drivers/base/core.c:3666
 usb_new_device+0x1052/0x19a0 drivers/usb/core/hub.c:2663
 hub_port_connect drivers/usb/core/hub.c:5531 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]
 port_event drivers/usb/core/hub.c:5831 [inline]
 hub_event+0x2bfd/0x50f0 drivers/usb/core/hub.c:5913
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
 worker_thread+0x870/0xd50 kernel/workqueue.c:3400
 kthread+0x7b7/0x940 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

final repro crashed as (corrupted=false):
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 <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!
------------[ cut here ]------------
WARNING: CPU: 1 PID: 24 at drivers/media/mc/mc-entity.c:1147 media_create_pad_link+0xa30/0xbb0 drivers/media/mc/mc-entity.c:1147
Modules linked in:
CPU: 1 UID: 0 PID: 24 Comm: kworker/1:0 Not tainted 6.15.0-rc3-syzkaller-00008-ga33b5a08cbbd #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: usb_hub_wq hub_event
RIP: 0010:media_create_pad_link+0xa30/0xbb0 drivers/media/mc/mc-entity.c:1147
Code: ff ff eb dd e8 01 17 87 f9 90 0f 0b 90 b8 ea ff ff ff eb cd e8 f1 16 87 f9 90 0f 0b 90 b8 ea ff ff ff eb bd e8 e1 16 87 f9 90 <0f> 0b 90 b8 ea ff ff ff eb ad e8 d1 16 87 f9 90 0f 0b 90 b8 ea ff
RSP: 0018:ffffc900001e6938 EFLAGS: 00010293
RAX: ffffffff883ba63f RBX: 0000000000000000 RCX: ffff88801d6e8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff883b9d31 R09: 1ffff11028ff0885
R10: dffffc0000000000 R11: ffffed1028ff0886 R12: dffffc0000000000
R13: ffff888028d4a080 R14: 0000000000000000 R15: ffff888028d4a0c8
FS:  0000000000000000(0000) GS:ffff88812509a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055735c9a1788 CR3: 000000000eb38000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 uvc_mc_create_links drivers/media/usb/uvc/uvc_entity.c:50 [inline]
 uvc_mc_register_entities+0x733/0xa00 drivers/media/usb/uvc/uvc_entity.c:151
 uvc_register_chains+0x3d4/0x4c0 drivers/media/usb/uvc/uvc_driver.c:2143
 uvc_probe+0x9c19/0xa6f0 drivers/media/usb/uvc/uvc_driver.c:2279
 usb_probe_interface+0x650/0xbc0 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x2b9/0xad0 drivers/base/dd.c:658
 __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
 driver_probe_device+0x50/0x430 drivers/base/dd.c:830
 __device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958
 bus_for_each_drv+0x258/0x2e0 drivers/base/bus.c:462
 __device_attach+0x341/0x530 drivers/base/dd.c:1030
 bus_probe_device+0x189/0x260 drivers/base/bus.c:537
 device_add+0x856/0xbf0 drivers/base/core.c:3666
 usb_set_configuration+0x1999/0x1fe0 drivers/usb/core/message.c:2210
 usb_generic_driver_probe+0x88/0x140 drivers/usb/core/generic.c:250
 usb_probe_device+0x1b8/0x380 drivers/usb/core/driver.c:291
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x2b9/0xad0 drivers/base/dd.c:658
 __driver_probe_device+0x1a2/0x390 drivers/base/dd.c:800
 driver_probe_device+0x50/0x430 drivers/base/dd.c:830
 __device_attach_driver+0x2d6/0x530 drivers/base/dd.c:958
 bus_for_each_drv+0x258/0x2e0 drivers/base/bus.c:462
 __device_attach+0x341/0x530 drivers/base/dd.c:1030
 bus_probe_device+0x189/0x260 drivers/base/bus.c:537
 device_add+0x856/0xbf0 drivers/base/core.c:3666
 usb_new_device+0x1052/0x19a0 drivers/usb/core/hub.c:2663
 hub_port_connect drivers/usb/core/hub.c:5531 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]
 port_event drivers/usb/core/hub.c:5831 [inline]
 hub_event+0x2bfd/0x50f0 drivers/usb/core/hub.c:5913
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
 worker_thread+0x870/0xd50 kernel/workqueue.c:3400
 kthread+0x7b7/0x940 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>