Oops: general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]
CPU: 0 UID: 0 PID: 7394 Comm: syz.6.231 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:hfsplus_rename_cat+0x3b9/0xf40 fs/hfsplus/catalog.c:480
Code: 0f b7 84 24 40 01 00 00 66 89 44 24 30 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 50 <42> 80 3c 28 00 74 08 4c 89 f7 e8 b8 bf 8d ff 4c 89 74 24 58 45 8b
RSP: 0018:ffffc900047b7780 EFLAGS: 00010202
RAX: 0000000000000008 RBX: ffff88803336b000 RCX: ffff888023d29e40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900047b7bb0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff920008f6efc
R13: dffffc0000000000 R14: 0000000000000040 R15: 0000000000000000
FS:  00007fd6b425d6c0(0000) GS:ffff888126d06000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd6b423cd58 CR3: 0000000041384000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 hfsplus_link+0x35c/0x6b0 fs/hfsplus/dir.c:323
 vfs_link+0x518/0x6e0 fs/namei.c:5646
 do_linkat+0x283/0x5a0 fs/namei.c:5716
 __do_sys_link fs/namei.c:5750 [inline]
 __se_sys_link fs/namei.c:5748 [inline]
 __x64_sys_link+0x82/0x90 fs/namei.c:5748
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd6b601f749
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:00007fd6b425d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007fd6b6276090 RCX: 00007fd6b601f749
RDX: 0000000000000000 RSI: 0000200000000300 RDI: 0000200000000200
RBP: 00007fd6b60a3f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd6b6276128 R14: 00007fd6b6276090 R15: 00007fff21057fd8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:hfsplus_rename_cat+0x3b9/0xf40 fs/hfsplus/catalog.c:480
Code: 0f b7 84 24 40 01 00 00 66 89 44 24 30 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 50 <42> 80 3c 28 00 74 08 4c 89 f7 e8 b8 bf 8d ff 4c 89 74 24 58 45 8b
RSP: 0018:ffffc900047b7780 EFLAGS: 00010202
RAX: 0000000000000008 RBX: ffff88803336b000 RCX: ffff888023d29e40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900047b7bb0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff920008f6efc
R13: dffffc0000000000 R14: 0000000000000040 R15: 0000000000000000
FS:  00007fd6b425d6c0(0000) GS:ffff888126d06000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd6b423cd58 CR3: 0000000041384000 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 30       	mov    %ax,0x30(%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 50       	mov    %rax,0x50(%rsp)
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 f7             	mov    %r14,%rdi
  34:	e8 b8 bf 8d ff       	call   0xff8dbff1
  39:	4c 89 74 24 58       	mov    %r14,0x58(%rsp)
  3e:	45                   	rex.RB
  3f:	8b                   	.byte 0x8b