general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 1 PID: 11602 Comm: syz.8.2874 Not tainted 6.1.138-syzkaller-00009-g6246d345f550 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:traverse_mounts fs/namei.c:1430 [inline]
RIP: 0010:handle_mounts fs/namei.c:1542 [inline]
RIP: 0010:step_into+0x11d/0xf30 fs/namei.c:1835
Code: 74 24 08 c6 44 24 7f 00 43 0f b6 04 3c 84 c0 4d 89 fd 0f 85 08 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 07 0c 00 00 45 8b 3f 44 89 fe 81 e6 00
RSP: 0018:ffffc90000d37a40 EFLAGS: 00010207
RAX: 0000000000000003 RBX: ffffc90000d37c80 RCX: 0000000000080000
RDX: ffffc900021f9000 RSI: 00000000000001d6 RDI: 00000000000001d7
RBP: ffffc90000d37b58 R08: dffffc0000000000 R09: ffffed1022734d65
R10: ffffed1022734d65 R11: 1ffff11022734d64 R12: 1ffff920001a6f97
R13: dffffc0000000000 R14: 0000000000000003 R15: 000000000000001d
FS:  00007f8f235496c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000013ba7a000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 walk_component+0x24c/0x420 fs/namei.c:2003
 lookup_last fs/namei.c:2454 [inline]
 path_lookupat+0x180/0x490 fs/namei.c:2478
 filename_lookup+0x1f0/0x500 fs/namei.c:2507
 user_path_at_empty+0x47/0x1c0 fs/namei.c:2904
 user_path_at include/linux/namei.h:57 [inline]
 __do_sys_chdir fs/open.c:515 [inline]
 __se_sys_chdir+0x91/0x280 fs/open.c:509
 __x64_sys_chdir+0x38/0x40 fs/open.c:509
 x64_sys_call+0xbb/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:81
 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: 0033:0x7f8f2278e929
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:00007f8f23549038 EFLAGS: 00000246 ORIG_RAX: 0000000000000050
RAX: ffffffffffffffda RBX: 00007f8f229b5fa0 RCX: 00007f8f2278e929
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000540
RBP: 00007f8f22810b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8f229b5fa0 R15: 00007ffc99586c88
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:traverse_mounts fs/namei.c:1430 [inline]
RIP: 0010:handle_mounts fs/namei.c:1542 [inline]
RIP: 0010:step_into+0x11d/0xf30 fs/namei.c:1835
Code: 74 24 08 c6 44 24 7f 00 43 0f b6 04 3c 84 c0 4d 89 fd 0f 85 08 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 07 0c 00 00 45 8b 3f 44 89 fe 81 e6 00
RSP: 0018:ffffc90000d37a40 EFLAGS: 00010207

RAX: 0000000000000003 RBX: ffffc90000d37c80 RCX: 0000000000080000
RDX: ffffc900021f9000 RSI: 00000000000001d6 RDI: 00000000000001d7
RBP: ffffc90000d37b58 R08: dffffc0000000000 R09: ffffed1022734d65
R10: ffffed1022734d65 R11: 1ffff11022734d64 R12: 1ffff920001a6f97
R13: dffffc0000000000 R14: 0000000000000003 R15: 000000000000001d
FS:  00007f8f235496c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055556c3694e8 CR3: 000000013ba7a000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
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 08 0c 00 00    	jne    0xc20
  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 07 0c 00 00    	jne    0xc3e
  37:	45 8b 3f             	mov    (%r15),%r15d
  3a:	44 89 fe             	mov    %r15d,%esi
  3d:	81                   	.byte 0x81
  3e:	e6 00                	out    %al,$0x0