configfs-gadget.g1 gadget.32: uvc: uvc_function_bind()
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000121: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000908-0x000000000000090f]
CPU: 1 UID: 0 PID: 12767 Comm: syz.6.928 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:uvcg_video_init+0x4ef/0x640 drivers/usb/gadget/function/uvc_video.c:824
Code: 89 63 60 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 d2 85 eb fa 48 8b 1b 4c 8d bb 08 09 00 00 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 b2 85 eb fa 4d 8b 3f 49 83 c7 30
RSP: 0018:ffffc90005f47710 EFLAGS: 00010206
RAX: 0000000000000121 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc90013c46000 RSI: 0000000000014932 RDI: 0000000000014933
RBP: 1ffff1100ca8c143 R08: ffffffff8fafa337 R09: 1ffffffff1f5f466
R10: dffffc0000000000 R11: fffffbfff1f5f467 R12: fffffffffffffffc
R13: dffffc0000000000 R14: ffff888065460a18 R15: 0000000000000908
FS:  00007fcd9c6466c0(0000) GS:ffff888125d3e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f158583da08 CR3: 0000000024778000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 uvc_function_bind+0x1076/0x15a0 drivers/usb/gadget/function/f_uvc.c:874
 usb_add_function+0x290/0x930 drivers/usb/gadget/composite.c:333
 configfs_composite_bind+0xde0/0x1410 drivers/usb/gadget/configfs.c:1802
 gadget_bind_driver+0x2ca/0x9e0 drivers/usb/gadget/udc/core.c:1662
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x254/0xae0 drivers/base/dd.c:706
 __driver_probe_device+0x1e8/0x360 drivers/base/dd.c:868
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:898
 __driver_attach+0x339/0x600 drivers/base/dd.c:1292
 bus_for_each_dev+0x23e/0x2c0 drivers/base/bus.c:383
 bus_add_driver+0x348/0x670 drivers/base/bus.c:763
 driver_register+0x23a/0x320 drivers/base/driver.c:174
 usb_gadget_register_driver_owner+0xf9/0x270 drivers/usb/gadget/udc/core.c:1752
 gadget_dev_desc_UDC_store+0x1c9/0x2f0 drivers/usb/gadget/configfs.c:300
 flush_write_buffer fs/configfs/file.c:207 [inline]
 configfs_write_iter+0x33a/0x430 fs/configfs/file.c:229
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61e/0xbb0 fs/read_write.c:687
 ksys_write+0x156/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fcd9e3ee019
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fcd9c646028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fcd9e675fa0 RCX: 00007fcd9e3ee019
RDX: 000000000000000c RSI: 0000200000000480 RDI: 0000000000000003
RBP: 00007fcd9e48500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcd9e676038 R14: 00007fcd9e675fa0 R15: 00007fff11bf5af8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:uvcg_video_init+0x4ef/0x640 drivers/usb/gadget/function/uvc_video.c:824
Code: 89 63 60 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 d2 85 eb fa 48 8b 1b 4c 8d bb 08 09 00 00 4c 89 f8 48 c1 e8 03 <42> 80 3c 28 00 74 08 4c 89 ff e8 b2 85 eb fa 4d 8b 3f 49 83 c7 30
RSP: 0018:ffffc90005f47710 EFLAGS: 00010206
RAX: 0000000000000121 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc90013c46000 RSI: 0000000000014932 RDI: 0000000000014933
RBP: 1ffff1100ca8c143 R08: ffffffff8fafa337 R09: 1ffffffff1f5f466
R10: dffffc0000000000 R11: fffffbfff1f5f467 R12: fffffffffffffffc
R13: dffffc0000000000 R14: ffff888065460a18 R15: 0000000000000908
FS:  00007fcd9c6466c0(0000) GS:ffff888125d3e000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c33615c CR3: 0000000024778000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	89 63 60             	mov    %esp,0x60(%rbx)
   3:	48 89 d8             	mov    %rbx,%rax
   6:	48 c1 e8 03          	shr    $0x3,%rax
   a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
   f:	74 08                	je     0x19
  11:	48 89 df             	mov    %rbx,%rdi
  14:	e8 d2 85 eb fa       	call   0xfaeb85eb
  19:	48 8b 1b             	mov    (%rbx),%rbx
  1c:	4c 8d bb 08 09 00 00 	lea    0x908(%rbx),%r15
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 ff             	mov    %r15,%rdi
  34:	e8 b2 85 eb fa       	call   0xfaeb85eb
  39:	4d 8b 3f             	mov    (%r15),%r15
  3c:	49 83 c7 30          	add    $0x30,%r15