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: 4697 Comm: syz.2.96 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
pstate: 22400005 (nzCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : vsscanf+0x170/0x1fe8 lib/vsprintf.c:3446
lr : vsscanf+0x158/0x1fe8 lib/vsprintf.c:3445
sp : ffff800021527440
x29: ffff800021527520 x28: ffff7000042a4e94 x27: ffff800017d37b30
x26: dfff800000000000 x25: ffff8000215276e0 x24: ffff800011d968c0
x23: 0000000020000600 x22: 0000000000000030 x21: 0000000000000000
x20: 0000000000000004 x19: ffff800013e49760 x18: 0000000000000000
x17: 0000000000000000 x16: ffff800011b90080 x15: 0000000000000002
x14: 0000000000000025 x13: 0000000000ff0100 x12: ffff800017d37b50
x11: ffff0000f5e2d400 x10: ffff800011a8a6e4 x9 : ffff800011d968c1
x8 : 0000000000000000 x7 : ffff8000215275c0 x6 : ffff8000215276a0
x5 : ffff8000215275e0 x4 : ffff800021527620 x3 : ffff800011a8c74c
x2 : ffff8000215275c0 x1 : ffff800017d37b30 x0 : 0000000000000030
Call trace:
 vsscanf+0x170/0x1fe8 lib/vsprintf.c:3446
 sscanf+0xd8/0x128 lib/vsprintf.c:3704
 split_huge_pages_write+0x384/0x163c mm/huge_memory.c:3166
 full_proxy_write+0x110/0x1f4 fs/debugfs/file.c:244
 vfs_write+0x2a8/0x7c8 fs/read_write.c:582
 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: 3400ea36 d343fea8 91000709 f9002fe9 (38fa6908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	3400ea36 	cbz	w22, 0x1d44
   4:	d343fea8 	lsr	x8, x21, #3
   8:	91000709 	add	x9, x24, #0x1
   c:	f9002fe9 	str	x9, [sp, #88]
* 10:	38fa6908 	ldrsb	w8, [x8, x26] <-- trapping instruction