Oops: general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]
CPU: 1 UID: 0 PID: 13429 Comm: syz.6.1813 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:hfsplus_rename_cat+0x3b1/0xde0 fs/hfsplus/catalog.c:480
Code: 0f b7 84 24 40 01 00 00 66 89 44 24 18 48 8b 9c 24 e0 00 00 00 48 8b 44 24 08 4c 8d 70 40 4c 89 f0 48 c1 e8 03 48 89 44 24 40 <42> 80 3c 20 00 74 08 4c 89 f7 e8 e0 4b 8b ff 4c 89 74 24 48 45 8b
RSP: 0018:ffffc90019dc7760 EFLAGS: 00010202
RAX: 0000000000000008 RBX: ffff8880260be000 RCX: 0000000000080000
RDX: ffffc9000c829000 RSI: 0000000000000aa3 RDI: 0000000000000aa4
RBP: ffffc90019dc7b90 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff920033b8ef8 R14: 0000000000000040 R15: 0000000000000000
FS:  00007f105823d6c0(0000) GS:ffff888125af0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd1ead6a000 CR3: 0000000059934000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 hfsplus_link+0x359/0x6a0 fs/hfsplus/dir.c:323
 vfs_link+0x4ea/0x6e0 fs/namei.c:4862
 do_linkat+0x272/0x560 fs/namei.c:4932
 __do_sys_linkat fs/namei.c:4960 [inline]
 __se_sys_linkat fs/namei.c:4957 [inline]
 __x64_sys_linkat+0xd4/0xf0 fs/namei.c:4957
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f105738eba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f105823d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000109
RAX: ffffffffffffffda RBX: 00007f10575d6090 RCX: 00007f105738eba9
RDX: ffffffffffffff9c RSI: 00002000000006c0 RDI: ffffffffffffff9c
RBP: 00007f1057411e19 R08: 0000000000001000 R09: 0000000000000000
R10: 0000200000000100 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f10575d6128 R14: 00007f10575d6090 R15: 00007ffd23b01a18
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:hfsplus_rename_cat+0x3b1/0xde0 fs/hfsplus/catalog.c:480
Code: 0f b7 84 24 40 01 00 00 66 89 44 24 18 48 8b 9c 24 e0 00 00 00 48 8b 44 24 08 4c 8d 70 40 4c 89 f0 48 c1 e8 03 48 89 44 24 40 <42> 80 3c 20 00 74 08 4c 89 f7 e8 e0 4b 8b ff 4c 89 74 24 48 45 8b
RSP: 0018:ffffc90019dc7760 EFLAGS: 00010202
RAX: 0000000000000008 RBX: ffff8880260be000 RCX: 0000000000080000
RDX: ffffc9000c829000 RSI: 0000000000000aa3 RDI: 0000000000000aa4
RBP: ffffc90019dc7b90 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff920033b8ef8 R14: 0000000000000040 R15: 0000000000000000
FS:  00007f105823d6c0(0000) GS:ffff8881259f0000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000001e0030 CR3: 0000000059934000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
   0:	0f b7 84 24 40 01 00 	movzwl 0x140(%rsp),%eax
   7:	00
   8:	66 89 44 24 18       	mov    %ax,0x18(%rsp)
   d:	48 8b 9c 24 e0 00 00 	mov    0xe0(%rsp),%rbx
  14:	00
  15:	48 8b 44 24 08       	mov    0x8(%rsp),%rax
  1a:	4c 8d 70 40          	lea    0x40(%rax),%r14
  1e:	4c 89 f0             	mov    %r14,%rax
  21:	48 c1 e8 03          	shr    $0x3,%rax
  25:	48 89 44 24 40       	mov    %rax,0x40(%rsp)
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 f7             	mov    %r14,%rdi
  34:	e8 e0 4b 8b ff       	call   0xff8b4c19
  39:	4c 89 74 24 48       	mov    %r14,0x48(%rsp)
  3e:	45                   	rex.RB
  3f:	8b                   	.byte 0x8b