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: 4887 Comm: syz.0.1189 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:traverse_mounts fs/namei.c:1365 [inline]
RIP: 0010:handle_mounts fs/namei.c:1485 [inline]
RIP: 0010:step_into+0x122/0xcd0 fs/namei.c:1790
Code: 24 18 c6 44 24 5f 00 43 0f b6 04 2c 84 c0 48 8d 53 38 0f 85 3d 0a 00 00 44 8b 32 4c 8b bc 24 88 00 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 40 0a 00 00 45 8b 3f 44 89 fe 81 e6 00
RSP: 0018:ffffc90000edfae0 EFLAGS: 00010203
RAX: 0000000000000001 RBX: ffffc90000edfce0 RCX: 0000000000080000
RDX: ffffc90000edfd18 RSI: 000000000000021a RDI: 000000000000021b
RBP: ffffc90000edfbc8 R08: 0000000000000000 R09: 1ffff110257d59c4
R10: dffffc0000000000 R11: ffffed10257d59c5 R12: 1ffff920001dbfa3
R13: dffffc0000000000 R14: 0000000000000008 R15: 000000000000000e
FS:  00007fe7ee8606c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe7ee85fff8 CR3: 000000010dccb000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 walk_component+0x263/0x460 fs/namei.c:1966
 lookup_last fs/namei.c:2411 [inline]
 path_lookupat+0x155/0x430 fs/namei.c:2435
 filename_lookup+0x1fd/0x660 fs/namei.c:2468
 user_path_at_empty fs/namei.c:2748 [inline]
 user_path_at include/linux/namei.h:60 [inline]
 do_linkat+0x106/0x670 fs/namei.c:4270
 __do_sys_link fs/namei.c:4318 [inline]
 __se_sys_link fs/namei.c:4316 [inline]
 __x64_sys_link+0x68/0x80 fs/namei.c:4316
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fe7efe490d9
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:00007fe7ee860028 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007fe7f00d1180 RCX: 00007fe7efe490d9
RDX: 0000000000000000 RSI: 0000200000000400 RDI: 0000200000000280
RBP: 00007fe7efee0024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe7f00d1218 R14: 00007fe7f00d1180 R15: 00007ffd0dbef038
Modules linked in:
---[ end trace 172b775a1911687a ]---
RIP: 0010:traverse_mounts fs/namei.c:1365 [inline]
RIP: 0010:handle_mounts fs/namei.c:1485 [inline]
RIP: 0010:step_into+0x122/0xcd0 fs/namei.c:1790
Code: 24 18 c6 44 24 5f 00 43 0f b6 04 2c 84 c0 48 8d 53 38 0f 85 3d 0a 00 00 44 8b 32 4c 8b bc 24 88 00 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 40 0a 00 00 45 8b 3f 44 89 fe 81 e6 00
RSP: 0018:ffffc90000edfae0 EFLAGS: 00010203
RAX: 0000000000000001 RBX: ffffc90000edfce0 RCX: 0000000000080000
RDX: ffffc90000edfd18 RSI: 000000000000021a RDI: 000000000000021b
RBP: ffffc90000edfbc8 R08: 0000000000000000 R09: 1ffff110257d59c4
R10: dffffc0000000000 R11: ffffed10257d59c5 R12: 1ffff920001dbfa3
R13: dffffc0000000000 R14: 0000000000000008 R15: 000000000000000e
FS:  00007fe7ee8606c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe7ee85fff8 CR3: 000000010dccb000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	24 18                	and    $0x18,%al
   2:	c6 44 24 5f 00       	movb   $0x0,0x5f(%rsp)
   7:	43 0f b6 04 2c       	movzbl (%r12,%r13,1),%eax
   c:	84 c0                	test   %al,%al
   e:	48 8d 53 38          	lea    0x38(%rbx),%rdx
  12:	0f 85 3d 0a 00 00    	jne    0xa55
  18:	44 8b 32             	mov    (%rdx),%r14d
  1b:	4c 8b bc 24 88 00 00 	mov    0x88(%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 40 0a 00 00    	jne    0xa77
  37:	45 8b 3f             	mov    (%r15),%r15d
  3a:	44 89 fe             	mov    %r15d,%esi
  3d:	81                   	.byte 0x81
  3e:	e6 00                	out    %al,$0x0