general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 0 PID: 21500 Comm: syz.2.5945 Tainted: G        W         5.15.170-syzkaller-00174-g431fb5556be3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:traverse_mounts fs/namei.c:1378 [inline]
RIP: 0010:handle_mounts fs/namei.c:1498 [inline]
RIP: 0010:step_into+0x1b6/0xe70 fs/namei.c:1806
Code: 20 0f 85 99 0a 00 00 44 8b 3b 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 89 b8 f3 ff 48 8b 9c 24 b8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 86 0a 00 00 8b 1b 89 de 81 e6 00 00 07
RSP: 0018:ffffc90000d77920 EFLAGS: 00010207
RAX: 0000000000000003 RBX: 000000000000001e RCX: 0000000000080000
RDX: ffffc90007380000 RSI: 0000000000002407 RDI: 0000000000002408
RBP: ffffc90000d77a50 R08: ffffffff81bf05c0 R09: ffffed1025121d25
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920001aef3b
R13: dffffc0000000000 R14: ffffc90000d77c40 R15: 0000000000000000
FS:  00007f744bbb16c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000112737000 CR4: 00000000003506b0
DR0: 0000000000002800 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 walk_component+0x359/0x610 fs/namei.c:1982
 lookup_last fs/namei.c:2431 [inline]
 path_lookupat+0x16d/0x450 fs/namei.c:2455
 filename_lookup+0x230/0x5c0 fs/namei.c:2484
 do_linkat+0x177/0x9f0 fs/namei.c:4608
 __do_sys_link fs/namei.c:4662 [inline]
 __se_sys_link fs/namei.c:4660 [inline]
 __x64_sys_link+0x86/0x90 fs/namei.c:4660
 x64_sys_call+0x282/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:87
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f744d55aed9
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:00007f744bbb1058 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007f744d721080 RCX: 00007f744d55aed9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000280
RBP: 00007f744d5cecc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f744d721080 R15: 00007fff76efaea8
 </TASK>
Modules linked in:
---[ end trace 78c5d6a0e58b3f8b ]---
RIP: 0010:traverse_mounts fs/namei.c:1378 [inline]
RIP: 0010:handle_mounts fs/namei.c:1498 [inline]
RIP: 0010:step_into+0x1b6/0xe70 fs/namei.c:1806
Code: 20 0f 85 99 0a 00 00 44 8b 3b 43 80 3c 2c 00 74 0a 48 8b 7c 24 18 e8 89 b8 f3 ff 48 8b 9c 24 b8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 86 0a 00 00 8b 1b 89 de 81 e6 00 00 07
RSP: 0018:ffffc90000d77920 EFLAGS: 00010207

RAX: 0000000000000003 RBX: 000000000000001e RCX: 0000000000080000
RDX: ffffc90007380000 RSI: 0000000000002407 RDI: 0000000000002408
RBP: ffffc90000d77a50 R08: ffffffff81bf05c0 R09: ffffed1025121d25
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920001aef3b
R13: dffffc0000000000 R14: ffffc90000d77c40 R15: 0000000000000000
FS:  00007f744bbb16c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 0000000112737000 CR4: 00000000003526b0
DR0: 0000000000002800 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	20 0f                	and    %cl,(%rdi)
   2:	85 99 0a 00 00 44    	test   %ebx,0x4400000a(%rcx)
   8:	8b 3b                	mov    (%rbx),%edi
   a:	43 80 3c 2c 00       	cmpb   $0x0,(%r12,%r13,1)
   f:	74 0a                	je     0x1b
  11:	48 8b 7c 24 18       	mov    0x18(%rsp),%rdi
  16:	e8 89 b8 f3 ff       	call   0xfff3b8a4
  1b:	48 8b 9c 24 b8 00 00 	mov    0xb8(%rsp),%rbx
  22:	00
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 86 0a 00 00    	jne    0xabd
  37:	8b 1b                	mov    (%rbx),%ebx
  39:	89 de                	mov    %ebx,%esi
  3b:	81                   	.byte 0x81
  3c:	e6 00                	out    %al,$0x0
  3e:	00 07                	add    %al,(%rdi)