general protection fault, probably for non-canonical address 0xdffffc000000000e: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000070-0x0000000000000077]
CPU: 0 PID: 4317 Comm: syz.0.18 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:unix_skb_len net/unix/af_unix.c:521 [inline]
RIP: 0010:unix_stream_recv_urg+0x197/0x580 net/unix/af_unix.c:2530
Code: 3c 20 00 74 0e 4c 89 ff 49 89 ce e8 b3 36 22 f9 4c 89 f1 4d 8b 37 49 39 ce 0f 84 99 01 00 00 49 8d 7e 70 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 4d 89 e7 0f 85 71 03 00 00 45 8b 66 70 49 8d
RSP: 0018:ffffc90002faf400 EFLAGS: 00010202
RAX: 000000000000000e RBX: ffffc90002faf6e0 RCX: ffff88807dd9b1b0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000070
RBP: ffff88807dd9b000 R08: ffff88807dd9b067 R09: 1ffff1100fbb360c
R10: dffffc0000000000 R11: ffffed100fbb360d R12: dffffc0000000000
R13: ffff88807dd9b1c8 R14: 0000000000000000 R15: ffff8880209bac88
FS:  0000555565a6f500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31a63fff CR3: 0000000023fa9000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 unix_stream_read_generic+0x20c6/0x2180 net/unix/af_unix.c:2637
 __unix_stream_recvmsg+0xf8/0x150 net/unix/af_unix.c:2845
 __unix_recvmsg net/unix/unix_bpf.c:47 [inline]
 unix_bpf_recvmsg+0xbbd/0xd30 net/unix/unix_bpf.c:-1
 unix_stream_recvmsg+0x156/0x1d0 net/unix/af_unix.c:2864
 ____sys_recvmsg+0x2ca/0x5b0 net/socket.c:-1
 ___sys_recvmsg+0x213/0x5c0 net/socket.c:2707
 __sys_recvmsg net/socket.c:2737 [inline]
 __do_sys_recvmsg net/socket.c:2747 [inline]
 __se_sys_recvmsg net/socket.c:2744 [inline]
 __x64_sys_recvmsg+0x201/0x2d0 net/socket.c:2744
 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: 0033:0x7f678c14b159
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:00007ffe9799c058 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007f678c3d2fa0 RCX: 00007f678c14b159
RDX: 0000000000002001 RSI: 0000200000000a80 RDI: 0000000000000004
RBP: 00007f678c1e206b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f678c3d2fac R14: 00007f678c3d2fa0 R15: 00007f678c3d2fa0
 </TASK>
Modules linked in:
---[ end trace 4ba80c4cd233e2df ]---
RIP: 0010:unix_skb_len net/unix/af_unix.c:521 [inline]
RIP: 0010:unix_stream_recv_urg+0x197/0x580 net/unix/af_unix.c:2530
Code: 3c 20 00 74 0e 4c 89 ff 49 89 ce e8 b3 36 22 f9 4c 89 f1 4d 8b 37 49 39 ce 0f 84 99 01 00 00 49 8d 7e 70 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 4d 89 e7 0f 85 71 03 00 00 45 8b 66 70 49 8d
RSP: 0018:ffffc90002faf400 EFLAGS: 00010202
RAX: 000000000000000e RBX: ffffc90002faf6e0 RCX: ffff88807dd9b1b0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000070
RBP: ffff88807dd9b000 R08: ffff88807dd9b067 R09: 1ffff1100fbb360c
R10: dffffc0000000000 R11: ffffed100fbb360d R12: dffffc0000000000
R13: ffff88807dd9b1c8 R14: 0000000000000000 R15: ffff8880209bac88
FS:  0000555565a6f500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31a63fff CR3: 0000000023fa9000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	3c 20                	cmp    $0x20,%al
   2:	00 74 0e 4c          	add    %dh,0x4c(%rsi,%rcx,1)
   6:	89 ff                	mov    %edi,%edi
   8:	49 89 ce             	mov    %rcx,%r14
   b:	e8 b3 36 22 f9       	call   0xf92236c3
  10:	4c 89 f1             	mov    %r14,%rcx
  13:	4d 8b 37             	mov    (%r15),%r14
  16:	49 39 ce             	cmp    %rcx,%r14
  19:	0f 84 99 01 00 00    	je     0x1b8
  1f:	49 8d 7e 70          	lea    0x70(%r14),%rdi
  23:	48 89 f8             	mov    %rdi,%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:	4d 89 e7             	mov    %r12,%r15
  34:	0f 85 71 03 00 00    	jne    0x3ab
  3a:	45 8b 66 70          	mov    0x70(%r14),%r12d
  3e:	49                   	rex.WB
  3f:	8d                   	.byte 0x8d