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: 30346 Comm: syz-executor.4 Tainted: G        W          6.1.68-syzkaller-00062-g4292d259032a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:traverse_mounts fs/namei.c:1428 [inline]
RIP: 0010:handle_mounts fs/namei.c:1540 [inline]
RIP: 0010:step_into+0x1c4/0x1090 fs/namei.c:1831
Code: c0 0f 85 bb 0b 00 00 44 8b 3b 43 80 3c 34 00 74 0a 48 8b 7c 24 10 e8 eb fa f2 ff 48 8b 9c 24 d8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 a8 0b 00 00 8b 1b 89 de 81 e6 00 00 07
RSP: 0018:ffffc900067071c0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 000000000000000b RCX: 0000000000040000
RDX: ffffc9000532d000 RSI: 0000000000000274 RDI: 0000000000000275
RBP: ffffc90006707310 R08: ffffffff81c94989 R09: ffffed10217ad785
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000ce0e53
R13: ffffc90006707440 R14: dffffc0000000000 R15: 0000000000000001
FS:  00007f9178be66c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9178c06fa8 CR3: 00000001e2e7c000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 walk_component+0x234/0x410 fs/namei.c:1999
 lookup_last fs/namei.c:2450 [inline]
 path_lookupat+0x16d/0x450 fs/namei.c:2474
 filename_lookup+0x251/0x600 fs/namei.c:2503
 kern_path+0x3c/0x1a0 fs/namei.c:2593
 unix_find_bsd net/unix/af_unix.c:1056 [inline]
 unix_find_other+0xf9/0x8e0 net/unix/af_unix.c:1117
 unix_dgram_sendmsg+0xc1f/0x2050 net/unix/af_unix.c:1968
 sock_sendmsg_nosec net/socket.c:716 [inline]
 __sock_sendmsg net/socket.c:728 [inline]
 ____sys_sendmsg+0x5dc/0x9d0 net/socket.c:2499
 ___sys_sendmsg net/socket.c:2553 [inline]
 __sys_sendmmsg+0x3b9/0x6f0 net/socket.c:2639
 __do_sys_sendmmsg net/socket.c:2668 [inline]
 __se_sys_sendmmsg net/socket.c:2665 [inline]
 __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2665
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f9177e7dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9178be60c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f9177fac050 RCX: 00007f9177e7dda9
RDX: 0000000000000002 RSI: 0000000020000340 RDI: 0000000000000003
RBP: 00007f9177eca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f9177fac050 R15: 00007ffdddda1a18
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:traverse_mounts fs/namei.c:1428 [inline]
RIP: 0010:handle_mounts fs/namei.c:1540 [inline]
RIP: 0010:step_into+0x1c4/0x1090 fs/namei.c:1831
Code: c0 0f 85 bb 0b 00 00 44 8b 3b 43 80 3c 34 00 74 0a 48 8b 7c 24 10 e8 eb fa f2 ff 48 8b 9c 24 d8 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 a8 0b 00 00 8b 1b 89 de 81 e6 00 00 07
RSP: 0018:ffffc900067071c0 EFLAGS: 00010202
RAX: 0000000000000001 RBX: 000000000000000b RCX: 0000000000040000
RDX: ffffc9000532d000 RSI: 0000000000000274 RDI: 0000000000000275
RBP: ffffc90006707310 R08: ffffffff81c94989 R09: ffffed10217ad785
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000ce0e53
R13: ffffc90006707440 R14: dffffc0000000000 R15: 0000000000000001
FS:  00007f9178be66c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8a2dd7cdb8 CR3: 00000001e2e7c000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	c0 0f 85             	rorb   $0x85,(%rdi)
   3:	bb 0b 00 00 44       	mov    $0x4400000b,%ebx
   8:	8b 3b                	mov    (%rbx),%edi
   a:	43 80 3c 34 00       	cmpb   $0x0,(%r12,%r14,1)
   f:	74 0a                	je     0x1b
  11:	48 8b 7c 24 10       	mov    0x10(%rsp),%rdi
  16:	e8 eb fa f2 ff       	call   0xfff2fb06
  1b:	48 8b 9c 24 d8 00 00 	mov    0xd8(%rsp),%rbx
  22:	00
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 30       	movzbl (%rax,%r14,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 a8 0b 00 00    	jne    0xbdf
  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)