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: 449 Comm: syz.2.16 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:traverse_mounts fs/namei.c:1386 [inline]
RIP: 0010:handle_mounts fs/namei.c:1506 [inline]
RIP: 0010:step_into+0x136/0xd20 fs/namei.c:1814
Code: 4c 8b 74 24 18 c6 44 24 7f 00 43 0f b6 44 25 00 84 c0 0f 85 77 0a 00 00 45 8b 36 4c 8b bc 24 a8 00 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 76 0a 00 00 45 8b 3f 44 89 fe 81 e6 00
RSP: 0018:ffffc90000bc78c0 EFLAGS: 00010203
RAX: 0000000000000001 RBX: ffffc90000bc7c00 RCX: ffff888116662780
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000bc79d0 R08: 0000000000000000 R09: 1ffff1102531cb74
R10: dffffc0000000000 R11: ffffed102531cb75 R12: dffffc0000000000
R13: 1ffff92000178f87 R14: 0000000000000010 R15: 000000000000000f
FS:  00007f79b74ef6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f79b74eeff8 CR3: 000000012bb6e000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 walk_component+0x26a/0x460 fs/namei.c:1990
 link_path_walk+0x665/0xd60 fs/namei.c:-1
 path_parentat fs/namei.c:2510 [inline]
 __filename_parentat+0x252/0x690 fs/namei.c:2534
 filename_parentat fs/namei.c:2552 [inline]
 filename_create+0xd5/0x470 fs/namei.c:3824
 do_mkdirat+0x5c/0x4c0 fs/namei.c:4088
 __do_sys_mkdirat fs/namei.c:4113 [inline]
 __se_sys_mkdirat fs/namei.c:4111 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4111
 x64_sys_call+0x37e/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:259
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f79b7aa8f97
Code: 00 66 90 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 db f7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 b8 02 01 00 00 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:00007f79b74eee58 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f79b74eeee0 RCX: 00007f79b7aa8f97
RDX: 00000000000001ff RSI: 0000200000000200 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000200
R13: 00007f79b74eeea0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 55eb943ae851c19d ]---
RIP: 0010:traverse_mounts fs/namei.c:1386 [inline]
RIP: 0010:handle_mounts fs/namei.c:1506 [inline]
RIP: 0010:step_into+0x136/0xd20 fs/namei.c:1814
Code: 4c 8b 74 24 18 c6 44 24 7f 00 43 0f b6 44 25 00 84 c0 0f 85 77 0a 00 00 45 8b 36 4c 8b bc 24 a8 00 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 76 0a 00 00 45 8b 3f 44 89 fe 81 e6 00
RSP: 0018:ffffc90000bc78c0 EFLAGS: 00010203
RAX: 0000000000000001 RBX: ffffc90000bc7c00 RCX: ffff888116662780
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000bc79d0 R08: 0000000000000000 R09: 1ffff1102531cb74
R10: dffffc0000000000 R11: ffffed102531cb75 R12: dffffc0000000000
R13: 1ffff92000178f87 R14: 0000000000000010 R15: 000000000000000f
FS:  00007f79b74ef6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001940 CR3: 000000012bb6e000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	4c 8b 74 24 18       	mov    0x18(%rsp),%r14
   5:	c6 44 24 7f 00       	movb   $0x0,0x7f(%rsp)
   a:	43 0f b6 44 25 00    	movzbl 0x0(%r13,%r12,1),%eax
  10:	84 c0                	test   %al,%al
  12:	0f 85 77 0a 00 00    	jne    0xa8f
  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 20       	movzbl (%rax,%r12,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 76 0a 00 00    	jne    0xaad
  37:	45 8b 3f             	mov    (%r15),%r15d
  3a:	44 89 fe             	mov    %r15d,%esi
  3d:	81                   	.byte 0x81
  3e:	e6 00                	out    %al,$0x0