Unable to handle kernel paging request at virtual address dfff800000000002
KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]
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
[dfff800000000002] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 5235 Comm: gfs2_quotad Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : do_sync+0x820/0xa68 fs/gfs2/quota.c:986
lr : do_sync+0x7fc/0xa68 fs/gfs2/quota.c:985
sp : ffff8000218a7b00
x29: ffff8000218a7c30 x28: 0000000000000001 x27: ffff80000a254700
x26: dfff800000000000 x25: 00000000fffffffb x24: 000000000000000f
x23: ffff700004314f68 x22: ffff0000f4028300 x21: 0000000000000000
x20: 0000000000000000 x19: ffff0000f635b5c0 x18: 1fffe00033e8417e
x17: ffff80000a252a78 x16: ffff8000082dcf38 x15: ffff8000088e63e4
x14: 0000000000000001 x13: 1ffff00002b707fa x12: 0000000000000000
x11: ff0080000a91e84c x10: 0000000000000000 x9 : 2934b64ba5f2ee00
x8 : 0000000000000002 x7 : ffff8000088f37e0 x6 : ffff8000088f1174
x5 : ffff0000fdcd59f8 x4 : ffff8000218a77b0 x3 : 0000000000000000
x2 : 0000000000000006 x1 : ffff800011c9dc80 x0 : 0000000000000000
Call trace:
 do_sync+0x820/0xa68 fs/gfs2/quota.c:986
 gfs2_quota_sync+0x2cc/0x4e8 fs/gfs2/quota.c:1329
 quotad_check_timeo fs/gfs2/quota.c:1519 [inline]
 gfs2_quotad+0x30c/0x520 fs/gfs2/quota.c:1566
 kthread+0x254/0x2e0 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:850
Code: 979a84e8 f9400294 91004288 d343fd08 (387a6908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	979a84e8 	bl	0xfffffffffe6a13a0
   4:	f9400294 	ldr	x20, [x20]
   8:	91004288 	add	x8, x20, #0x10
   c:	d343fd08 	lsr	x8, x8, #3
* 10:	387a6908 	ldrb	w8, [x8, x26] <-- trapping instruction