configfs-gadget.g1 gadget.1: uvc: uvc_function_bind()
Unable to handle kernel paging request at virtual address dfff8000000000f4
KASAN: null-ptr-deref in range [0x00000000000007a0-0x00000000000007a7]
Mem abort info:
  ESR = 0x0000000096000005
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x05: level 1 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0
[dfff8000000000f4] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 4912 Comm: syz.0.1 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : uvcg_video_init+0x460/0x598 drivers/usb/gadget/function/uvc_video.c:824
lr : uvcg_video_init+0x424/0x598 drivers/usb/gadget/function/uvc_video.c:822
sp : ffff800095a37500
x29: ffff800095a37500 x28: 0000000000000000 x27: ffff0000cb036528
x26: ffff0000cecc0e00 x25: 1fffe00019606ca5 x24: 0000000000000000
x23: 1fffe00019d98116 x22: dfff800000000000 x21: fffffffffffffffc
x20: ffff0000cecc08b0 x19: 00000000000007a0 x18: 00000000ffffffff
x17: ffff80008a791000 x16: 0000000000000007 x15: ffff800080c9daa4
x14: ffff800080c9d924 x13: 0000000000000001 x12: 0000000000000000
x11: ffff80008a590e28 x10: 0000000000080000 x9 : 0000000000013290
x8 : 00000000000000f4 x7 : 0000000000000000 x6 : ffff80008016855c
x5 : ffff0000f473c940 x4 : 0000000000000008 x3 : ffff8000801571a8
x2 : 0000000000000006 x1 : ffff0000c79fd7c0 x0 : 0000000000000001
Call trace:
 uvcg_video_init+0x460/0x598 drivers/usb/gadget/function/uvc_video.c:824 (P)
 uvc_function_bind+0xd9c/0x1230 drivers/usb/gadget/function/f_uvc.c:874
 usb_add_function+0x1d0/0x6bc drivers/usb/gadget/composite.c:333
 configfs_composite_bind+0xb4c/0x10b8 drivers/usb/gadget/configfs.c:1802
 gadget_bind_driver+0x274/0x834 drivers/usb/gadget/udc/core.c:1662
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x29c/0x800 drivers/base/dd.c:706
 __driver_probe_device+0x1e0/0x350 drivers/base/dd.c:868
 driver_probe_device+0x6c/0x19c drivers/base/dd.c:898
 __driver_attach+0x168/0x384 drivers/base/dd.c:1292
 bus_for_each_dev+0x128/0x1b4 drivers/base/bus.c:383
 driver_attach+0x50/0x60 drivers/base/dd.c:1310
 bus_add_driver+0x208/0x500 drivers/base/bus.c:763
 driver_register+0x220/0x310 drivers/base/driver.c:174
 usb_gadget_register_driver_owner+0xf0/0x25c drivers/usb/gadget/udc/core.c:1752
 gadget_dev_desc_UDC_store+0x164/0x22c drivers/usb/gadget/configfs.c:300
 flush_write_buffer fs/configfs/file.c:207 [inline]
 configfs_write_iter+0x27c/0x354 fs/configfs/file.c:229
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x51c/0xa0c fs/read_write.c:687
 ksys_write+0x12c/0x228 fs/read_write.c:739
 __do_sys_write fs/read_write.c:750 [inline]
 __se_sys_write fs/read_write.c:747 [inline]
 __arm64_sys_write+0x84/0x98 fs/read_write.c:747
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121
 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140
 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736
 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
Code: 9753c18d f9400278 911e8313 d343fe68 (38766908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	9753c18d 	bl	0xfffffffffd4f0634
   4:	f9400278 	ldr	x24, [x19]
   8:	911e8313 	add	x19, x24, #0x7a0
   c:	d343fe68 	lsr	x8, x19, #3
* 10:	38766908 	ldrb	w8, [x8, x22] <-- trapping instruction