hfsplus: bad catalog entry type
Unable to handle kernel paging request at virtual address dfff800000000008
KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]
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, Xs = 0
[dfff800000000008] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 6381 Comm: syz-executor Not tainted 6.15.0-rc5-syzkaller-00032-g0d8d44db295c #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : hfsplus_rename_cat+0x314/0xd48 fs/hfsplus/catalog.c:480
lr : hfsplus_rename_cat+0x2f8/0xd48 fs/hfsplus/catalog.c:474
sp : ffff8000a0357640
x29: ffff8000a0357a40 x28: 0000000000000000 x27: ffff70001406aed4
x26: ffff0000ded094e8 x25: ffff0000d5ef9cd8 x24: ffff0000e628c000
x23: dfff800000000000 x22: ffff0000d5de0000 x21: ffff8000a03576a0
x20: 0000000000000040 x19: 1fffe0001abdf39b x18: 00000000ffffffff
x17: ffff800090308000 x16: 0000000000000000 x15: 0000000000000000
x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000000 x10: 0000000000ff0100 x9 : 0000000000000200
x8 : 0000000000000008 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff8000a0357878 x4 : ffff000173cfc1c4 x3 : ffff8000a0357800
x2 : ffffffffffffffe8 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 hfsplus_rename_cat+0x314/0xd48 fs/hfsplus/catalog.c:480 (P)
 hfsplus_unlink+0x260/0x63c fs/hfsplus/dir.c:376
 vfs_unlink+0x2e0/0x520 fs/namei.c:4579
 do_unlinkat+0x2f0/0x4dc fs/namei.c:4643
 __do_sys_unlinkat fs/namei.c:4684 [inline]
 __se_sys_unlinkat fs/namei.c:4677 [inline]
 __arm64_sys_unlinkat+0xdc/0xf8 fs/namei.c:4677
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x78/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600
Code: 91010114 b9002be9 d343fe88 f9000fe8 (38776908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	91010114 	add	x20, x8, #0x40
   4:	b9002be9 	str	w9, [sp, #40]
   8:	d343fe88 	lsr	x8, x20, #3
   c:	f9000fe8 	str	x8, [sp, #24]
* 10:	38776908 	ldrb	w8, [x8, x23] <-- trapping instruction