general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]
CPU: 0 PID: 8725 Comm: syz.7.1082 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:hfsplus_rename_cat+0x3ab/0xdf0 fs/hfsplus/catalog.c:480
Code: 0f b7 84 24 40 01 00 00 66 89 44 24 08 48 8b 9c 24 e0 00 00 00 48 8b 44 24 18 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 d6 17 8c ff 4c 89 74 24 48 45 8b
RSP: 0018:ffffc90003ad77c0 EFLAGS: 00010202
RAX: 0000000000000008 RBX: ffff888026f03000 RCX: 0000000000080000
RDX: ffffc90015da5000 RSI: 0000000000004056 RDI: 0000000000004057
RBP: ffffc90003ad7bf0 R08: dffffc0000000000 R09: fffff5200075af3f
R10: 0000000000000000 R11: 0000000000000018 R12: dffffc0000000000
R13: 1ffff9200075af04 R14: 0000000000000040 R15: 0000000000000000
FS:  00007fcc7165e6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555588ad3808 CR3: 00000000636fa000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 hfsplus_link+0x357/0x700 fs/hfsplus/dir.c:323
 vfs_link+0x615/0x7c0 fs/namei.c:4607
 do_linkat+0x274/0x550 fs/namei.c:4678
 __do_sys_linkat fs/namei.c:4706 [inline]
 __se_sys_linkat fs/namei.c:4703 [inline]
 __x64_sys_linkat+0xda/0xf0 fs/namei.c:4703
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fcc7078f749
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:00007fcc7165e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000109
RAX: ffffffffffffffda RBX: 00007fcc709e5fa0 RCX: 00007fcc7078f749
RDX: ffffffffffffff9c RSI: 0000200000000000 RDI: ffffffffffffff9c
RBP: 00007fcc70813f91 R08: 0000000000000000 R09: 0000000000000000
R10: 00002000000006c0 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcc709e6038 R14: 00007fcc709e5fa0 R15: 00007ffd3dfe6728
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:hfsplus_rename_cat+0x3ab/0xdf0 fs/hfsplus/catalog.c:480
Code: 0f b7 84 24 40 01 00 00 66 89 44 24 08 48 8b 9c 24 e0 00 00 00 48 8b 44 24 18 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 d6 17 8c ff 4c 89 74 24 48 45 8b
RSP: 0018:ffffc90003ad77c0 EFLAGS: 00010202
RAX: 0000000000000008 RBX: ffff888026f03000 RCX: 0000000000080000
RDX: ffffc90015da5000 RSI: 0000000000004056 RDI: 0000000000004057
RBP: ffffc90003ad7bf0 R08: dffffc0000000000 R09: fffff5200075af3f
R10: 0000000000000000 R11: 0000000000000018 R12: dffffc0000000000
R13: 1ffff9200075af04 R14: 0000000000000040 R15: 0000000000000000
FS:  00007fcc7165e6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000636fa000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	0f b7 84 24 40 01 00 	movzwl 0x140(%rsp),%eax
   7:	00
   8:	66 89 44 24 08       	mov    %ax,0x8(%rsp)
   d:	48 8b 9c 24 e0 00 00 	mov    0xe0(%rsp),%rbx
  14:	00
  15:	48 8b 44 24 18       	mov    0x18(%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 d6 17 8c ff       	call   0xff8c180f
  39:	4c 89 74 24 48       	mov    %r14,0x48(%rsp)
  3e:	45                   	rex.RB
  3f:	8b                   	.byte 0x8b