Unable to handle kernel paging request at virtual address dfff800000000000
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
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
[dfff800000000000] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1]  SMP
Modules linked in:
CPU: 1 UID: 0 PID: 9585 Comm: syz.6.1341 Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
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 : dummy_udc_stop+0x84/0x180 drivers/usb/gadget/udc/dummy_hcd.c:1053
lr : gadget_to_dummy_hcd drivers/usb/gadget/udc/dummy_hcd.c:318 [inline]
lr : dummy_udc_stop+0x54/0x180 drivers/usb/gadget/udc/dummy_hcd.c:1052
sp : ffff800092457820
x29: ffff800092457820 x28: 1fffe00019551601 x27: ffff0000caa8b008
x26: 1fffe00019551600 x25: dfff800000000000 x24: 1fffe000195516a0
x23: ffff0000caa8b501 x22: ffff800087332198 x21: dfff800000000000
x20: 0000000000000003 x19: 0000000000000000 x18: 00000000ffffffff
x17: ffff80008a791000 x16: 0000000000000007 x15: ffff800080c9daa4
x14: ffff800080c9d924 x13: 0000000000000001 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000080000 x9 : 00000000000006a8
x8 : 0000000000000000 x7 : ffff8000835b1830 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000835b7fc4
x2 : 0000000000000003 x1 : ffff000109fdba80 x0 : 0000000000000000
Call trace:
 dummy_udc_stop+0x84/0x180 drivers/usb/gadget/udc/dummy_hcd.c:1053 (P)
 usb_gadget_udc_stop_locked drivers/usb/gadget/udc/core.c:1265 [inline]
 gadget_unbind_driver+0x204/0x790 drivers/usb/gadget/udc/core.c:1727
 device_remove+0xc4/0x134 drivers/base/dd.c:616
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x124/0x20c drivers/base/dd.c:1372
 driver_detach+0x124/0x1b4 drivers/base/dd.c:1435
 bus_remove_driver+0x124/0x22c drivers/base/bus.c:832
 driver_unregister+0x78/0xac drivers/base/driver.c:202
 usb_gadget_unregister_driver+0x50/0x78 drivers/usb/gadget/udc/core.c:1784
 unregister_gadget+0x4c/0xc0 drivers/usb/gadget/configfs.c:263
 gadget_dev_desc_UDC_store+0x120/0x22c drivers/usb/gadget/configfs.c:290
 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: aa1303e0 97579398 f9400273 d343fe68 (38756908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	aa1303e0 	mov	x0, x19
   4:	97579398 	bl	0xfffffffffd5e4e64
   8:	f9400273 	ldr	x19, [x19]
   c:	d343fe68 	lsr	x8, x19, #3
* 10:	38756908 	ldrb	w8, [x8, x21] <-- trapping instruction