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 = 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
[dfff800000000008] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4289 Comm: syz-executor343 Not tainted 6.1.116-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : hfsplus_rename_cat+0x3e4/0xf30 fs/hfsplus/catalog.c:480
lr : hfsplus_rename_cat+0x3a0/0xf30 fs/hfsplus/catalog.c:474
sp : ffff800021077540
x29: ffff8000210779a0 x28: ffff0000d9ad9cd8 x27: ffff0000d846f950
x26: 0000000000000040 x25: 1fffe0001b35b39b x24: ffff0000c44dd000
x23: ffff70000420eec0 x22: ffff8000210776e0 x21: dfff800000000000
x20: 00000000000000f8 x19: ffff800021077620 x18: ffff800021076fa0
x17: ffff800018abc000 x16: ffff8000121e6200 x15: 0000000000000000
x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000ff0100 x10: 0000000000000000 x9 : 0000000000000200
x8 : 0000000000000008 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff8000210777d8 x4 : ffff00016b41c1d4 x3 : ffff800021077760
x2 : ffffffffffffffe8 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 hfsplus_rename_cat+0x3e4/0xf30 fs/hfsplus/catalog.c:480
 hfsplus_unlink+0x278/0x6a0 fs/hfsplus/dir.c:376
 vfs_unlink+0x2f0/0x508 fs/namei.c:4322
 do_unlinkat+0x4cc/0x70c fs/namei.c:4390
 __do_sys_unlinkat fs/namei.c:4433 [inline]
 __se_sys_unlinkat fs/namei.c:4426 [inline]
 __arm64_sys_unlinkat+0xcc/0xfc fs/namei.c:4426
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x168 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: f940a3f8 9101011a d343ff48 f9001fe8 (38756908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	f940a3f8 	ldr	x24, [sp, #320]
   4:	9101011a 	add	x26, x8, #0x40
   8:	d343ff48 	lsr	x8, x26, #3
   c:	f9001fe8 	str	x8, [sp, #56]
* 10:	38756908 	ldrb	w8, [x8, x21] <-- trapping instruction