general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 1 PID: 8220 Comm: syz.2.2014 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:traverse_mounts fs/namei.c:1438 [inline]
RIP: 0010:handle_mounts fs/namei.c:1550 [inline]
RIP: 0010:step_into+0x125/0xf40 fs/namei.c:1843
Code: 74 24 08 c6 44 24 7f 00 43 0f b6 04 3c 84 c0 4d 89 fd 0f 85 10 0c 00 00 45 8b 36 4c 8b bc 24 a8 00 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 0f 0c 00 00 45 8b 3f 44 89 fe 81 e6 00
RSP: 0018:ffffc90002787a60 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffffc90002787ca0 RCX: 0000000000080000
RDX: ffffc90006449000 RSI: 000000000000026b RDI: 000000000000026c
RBP: ffffc90002787b78 R08: ffff88814cc62b27 R09: 1ffff1102998c564
R10: dffffc0000000000 R11: ffffed102998c565 R12: 1ffff920004f0f9b
R13: dffffc0000000000 R14: 0000000000000000 R15: 000000000000000a
FS:  00007f9aa82436c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9aa8243d58 CR3: 000000012e62e000 CR4: 00000000003506a0
Call Trace:
 <TASK>
 walk_component+0x24c/0x420 fs/namei.c:2011
 lookup_last fs/namei.c:2462 [inline]
 path_lookupat+0x180/0x490 fs/namei.c:2486
 filename_lookup+0x224/0x560 fs/namei.c:2515
 do_linkat+0xed/0x750 fs/namei.c:4657
 __do_sys_link fs/namei.c:4711 [inline]
 __se_sys_link fs/namei.c:4709 [inline]
 __x64_sys_link+0x86/0x90 fs/namei.c:4709
 x64_sys_call+0x266/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:87
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f9aa739aeb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9aa8243028 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007f9aa7616090 RCX: 00007f9aa739aeb9
RDX: 0000000000000000 RSI: 0000200000000400 RDI: 0000200000000280
RBP: 00007f9aa7408c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9aa7616128 R14: 00007f9aa7616090 R15: 00007ffee1902a38
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:traverse_mounts fs/namei.c:1438 [inline]
RIP: 0010:handle_mounts fs/namei.c:1550 [inline]
RIP: 0010:step_into+0x125/0xf40 fs/namei.c:1843
Code: 74 24 08 c6 44 24 7f 00 43 0f b6 04 3c 84 c0 4d 89 fd 0f 85 10 0c 00 00 45 8b 36 4c 8b bc 24 a8 00 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 0f 0c 00 00 45 8b 3f 44 89 fe 81 e6 00
RSP: 0018:ffffc90002787a60 EFLAGS: 00010202

RAX: 0000000000000001 RBX: ffffc90002787ca0 RCX: 0000000000080000
RDX: ffffc90006449000 RSI: 000000000000026b RDI: 000000000000026c
RBP: ffffc90002787b78 R08: ffff88814cc62b27 R09: 1ffff1102998c564
R10: dffffc0000000000 R11: ffffed102998c565 R12: 1ffff920004f0f9b
R13: dffffc0000000000 R14: 0000000000000000 R15: 000000000000000a
FS:  00007f9aa82436c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb6387e0ad8 CR3: 000000012e62e000 CR4: 00000000003506a0
----------------
Code disassembly (best guess):
   0:	74 24                	je     0x26
   2:	08 c6                	or     %al,%dh
   4:	44 24 7f             	rex.R and $0x7f,%al
   7:	00 43 0f             	add    %al,0xf(%rbx)
   a:	b6 04                	mov    $0x4,%dh
   c:	3c 84                	cmp    $0x84,%al
   e:	c0 4d 89 fd          	rorb   $0xfd,-0x77(%rbp)
  12:	0f 85 10 0c 00 00    	jne    0xc28
  18:	45 8b 36             	mov    (%r14),%r14d
  1b:	4c 8b bc 24 a8 00 00 	mov    0xa8(%rsp),%r15
  22:	00
  23:	4c 89 f8             	mov    %r15,%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 0f 0c 00 00    	jne    0xc46
  37:	45 8b 3f             	mov    (%r15),%r15d
  3a:	44 89 fe             	mov    %r15d,%esi
  3d:	81                   	.byte 0x81
  3e:	e6 00                	out    %al,$0x0