general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 1 PID: 349 Comm: syz-executor.0 Not tainted 6.1.145-syzkaller-1169984-g3b4ff5af8d36 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:vfs_link+0x40/0x800 fs/namei.c:4554
Code: 89 4d c0 49 89 d6 49 89 f4 48 89 fb 49 bf 00 00 00 00 00 fc ff df e8 8f 8b af ff 48 89 5d a8 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 c1 ee f3 ff 4c 89 65 c8 48 8b 03
RSP: 0018:ffffc900014a7c50 EFLAGS: 00010206
RAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff8881083bbcc0
RDX: 0000000000000000 RSI: ffffffff86ef84e0 RDI: 0000000000000000
RBP: ffffc900014a7cb0 R08: 0000000000000000 R09: ffffed1022dc1f46
R10: ffffed1022dc1f46 R11: 1ffff11022dc1f45 R12: ffffffff86ef84e0
R13: ffff88811202d840 R14: ffff888116e0f980 R15: dffffc0000000000
FS:  00007f7eabb976c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 000000010fcae000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 incfs_link fs/incfs/vfs.c:648 [inline]
 dir_link+0x305/0x470 fs/incfs/vfs.c:1321
 vfs_link+0x64b/0x800 fs/namei.c:4598
 do_linkat+0x1e7/0x730 fs/namei.c:4669
 __do_sys_linkat fs/namei.c:4697 [inline]
 __se_sys_linkat fs/namei.c:4694 [inline]
 __x64_sys_linkat+0xe4/0x100 fs/namei.c:4694
 x64_sys_call+0x4e3/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:266
 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: 0033:0x7f7eaae7dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7eabb970c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000109
RAX: ffffffffffffffda RBX: 00007f7eaafac050 RCX: 00007f7eaae7dda9
RDX: 0000000000000004 RSI: 0000000020000080 RDI: 0000000000000004
RBP: 00007f7eaaeca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f7eaafac050 R15: 00007ffc4fff58e8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:vfs_link+0x40/0x800 fs/namei.c:4554
Code: 89 4d c0 49 89 d6 49 89 f4 48 89 fb 49 bf 00 00 00 00 00 fc ff df e8 8f 8b af ff 48 89 5d a8 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 c1 ee f3 ff 4c 89 65 c8 48 8b 03
RSP: 0018:ffffc900014a7c50 EFLAGS: 00010206
RAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff8881083bbcc0
RDX: 0000000000000000 RSI: ffffffff86ef84e0 RDI: 0000000000000000
RBP: ffffc900014a7cb0 R08: 0000000000000000 R09: ffffed1022dc1f46
R10: ffffed1022dc1f46 R11: 1ffff11022dc1f45 R12: ffffffff86ef84e0
R13: ffff88811202d840 R14: ffff888116e0f980 R15: dffffc0000000000
FS:  00007f7eabb976c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 000000010fcae000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	89 4d c0             	mov    %ecx,-0x40(%rbp)
   3:	49 89 d6             	mov    %rdx,%r14
   6:	49 89 f4             	mov    %rsi,%r12
   9:	48 89 fb             	mov    %rdi,%rbx
   c:	49 bf 00 00 00 00 00 	movabs $0xdffffc0000000000,%r15
  13:	fc ff df
  16:	e8 8f 8b af ff       	call   0xffaf8baa
  1b:	48 89 5d a8          	mov    %rbx,-0x58(%rbp)
  1f:	48 83 c3 30          	add    $0x30,%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 c1 ee f3 ff       	call   0xfff3eefa
  39:	4c 89 65 c8          	mov    %r12,-0x38(%rbp)
  3d:	48 8b 03             	mov    (%rbx),%rax