Unable to handle kernel paging request at virtual address dfff800000000000
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
Mem abort info:
  ESR = 0x0000000096000006
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000006
  CM = 0, WnR = 0
[dfff800000000000] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 7152 Comm: syz.7.641 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
pstate: 824000c5 (Nzcv daIF +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : set_link_state+0x38/0xf38 drivers/usb/gadget/udc/dummy_hcd.c:435
lr : set_link_state+0x34/0xf38 drivers/usb/gadget/udc/dummy_hcd.c:434
sp : ffff800021a974b0
x29: ffff800021a97500 x28: ffff0000d1b96010 x27: dfff800000000000
x26: 1fffe0001a496189 x25: ffff80000dceb9e4 x24: dfff800000000000
x23: 0000000000000000 x22: 0000000000000000 x21: ffff0000d24b124a
x20: 0000000000000000 x19: 0000000000000000 x18: 0000000000000000
x17: 00000000ffff0000 x16: ffff8000082f2840 x15: ffff8000184cd000
x14: ffff700004352e90 x13: 1ffff00004352e90 x12: 0000000000080000
x11: 000000000000c850 x10: ffff8000236ea000 x9 : ffff80000dcec254
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000020 x4 : 0000000000000000 x3 : ffff8000082f2968
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 set_link_state+0x38/0xf38 drivers/usb/gadget/udc/dummy_hcd.c:435
 dummy_pullup+0xd8/0x12c drivers/usb/gadget/udc/dummy_hcd.c:914
 usb_gadget_disconnect_locked+0xf8/0x54c drivers/usb/gadget/udc/core.c:782
 gadget_unbind_driver+0xa0/0x35c drivers/usb/gadget/udc/core.c:1696
 device_remove drivers/base/dd.c:547 [inline]
 __device_release_driver drivers/base/dd.c:1279 [inline]
 device_release_driver_internal+0x3d4/0x6e4 drivers/base/dd.c:1305
 device_release_driver+0x28/0x38 drivers/base/dd.c:1328
 bus_remove_device+0x294/0x384 drivers/base/bus.c:531
 device_del+0x580/0x990 drivers/base/core.c:3900
 usb_del_gadget+0x160/0x214 drivers/usb/gadget/udc/core.c:1580
 usb_del_gadget_udc+0x20/0x38 drivers/usb/gadget/udc/core.c:1603
 dummy_udc_remove+0x54/0x68 drivers/usb/gadget/udc/dummy_hcd.c:1123
 platform_remove+0x98/0xf0 drivers/base/platform.c:1422
 device_remove drivers/base/dd.c:547 [inline]
 __device_release_driver drivers/base/dd.c:1279 [inline]
 device_release_driver_internal+0x3d4/0x6e4 drivers/base/dd.c:1305
 device_driver_detach+0x48/0x58 drivers/base/dd.c:1341
 unbind_store+0x2a8/0x2b4 drivers/base/bus.c:193
 drv_attr_store+0x80/0xa4 drivers/base/bus.c:77
 sysfs_kf_write+0x1f8/0x274 fs/sysfs/file.c:140
 kernfs_fop_write_iter+0x390/0x4b4 fs/kernfs/file.c:352
 call_write_iter include/linux/fs.h:2265 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x3c8/0x7c8 fs/read_write.c:584
 ksys_write+0x12c/0x228 fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: aa0003f4 f2fbfffb 969f1b84 d343fe88 (387b6908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	aa0003f4 	mov	x20, x0
   4:	f2fbfffb 	movk	x27, #0xdfff, lsl #48
   8:	969f1b84 	bl	0xfffffffffa7c6e18
   c:	d343fe88 	lsr	x8, x20, #3
* 10:	387b6908 	ldrb	w8, [x8, x27] <-- trapping instruction