netlink: 4 bytes leftover after parsing attributes in process `syz-executor3'.
------------[ cut here ]------------
kernel BUG at net/ipv6/route.c:1268!
invalid opcode: 0000 [#1] SMP KASAN
CPU: 1 PID: 6883 Comm: syz-executor4 Not tainted 4.18.0-rc6+ #163
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:rt6_make_pcpu_route net/ipv6/route.c:1268 [inline]
RIP: 0010:ip6_pol_route+0x9e3/0x1250 net/ipv6/route.c:1925
Code: 31 e4 e8 80 4c 02 fc 4c 89 e0 f0 4c 0f b1 33 31 ff 49 89 c4 48 89 c6 e8 1b 36 c4 fb 4d 85 e4 0f 84 0d fa ff ff e8 dd 34 c4 fb <0f> 0b e8 d6 34 c4 fb e8 81 a3 ae fb 31 ff 89 c6 88 85 e0 fd ff ff 
RSP: 0018:ffff88019f9bed48 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffffe8ffffd6e4e8 RCX: ffffc90005e4c000
RDX: 0000000000040000 RSI: ffffffff85b7e0a3 RDI: 0000000000000007
RBP: ffff88019f9bef78 R08: ffff8801b539a080 R09: fffff91ffffadc9d
R10: fffff91ffffadc9d R11: ffffe8ffffd6e4ef R12: ffff8801c7f85e00
R13: 0000000000000001 R14: ffff8801b9bdd540 R15: 0000000000000001
FS:  00007f563ed09700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb286915000 CR3: 00000001c88cb000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 ip6_pol_route_output+0x54/0x70 net/ipv6/route.c:2098
 fib6_rule_lookup+0x26e/0x700 net/ipv6/fib6_rules.c:122
 ip6_route_output_flags+0x2c5/0x350 net/ipv6/route.c:2126
 ip6_dst_lookup_tail+0x1278/0x1da0 net/ipv6/ip6_output.c:978
 ip6_dst_lookup_flow+0xc8/0x270 net/ipv6/ip6_output.c:1079
 inet6_csk_route_socket+0x8cb/0x1030 net/ipv6/inet6_connection_sock.c:110
 inet6_csk_xmit+0x118/0x630 net/ipv6/inet6_connection_sock.c:125
 l2tp_xmit_core net/l2tp/l2tp_core.c:1030 [inline]
 l2tp_xmit_skb+0x1469/0x1830 net/l2tp/l2tp_core.c:1132
 pppol2tp_sendmsg+0x4ae/0x6c0 net/l2tp/l2tp_ppp.c:331
 sock_sendmsg_nosec net/socket.c:641 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:651
 ___sys_sendmsg+0x51d/0x930 net/socket.c:2134
 __sys_sendmmsg+0x240/0x6f0 net/socket.c:2229
 __do_sys_sendmmsg net/socket.c:2258 [inline]
 __se_sys_sendmmsg net/socket.c:2255 [inline]
 __x64_sys_sendmmsg+0x9d/0x100 net/socket.c:2255
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x456a09
Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 
RSP: 002b:00007f563ed08c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f563ed096d4 RCX: 0000000000456a09
RDX: 00000000000003e8 RSI: 0000000020005fc0 RDI: 0000000000000015
RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000
syz-executor5 (6871) used greatest stack depth: 16240 bytes left
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000004d2c98 R14: 00000000004c7a00 R15: 0000000000000000
Modules linked in:
Dumping ftrace buffer:
   (ftrace buffer empty)
---[ end trace ec0ddf78020b6cca ]---
RIP: 0010:rt6_make_pcpu_route net/ipv6/route.c:1268 [inline]
RIP: 0010:ip6_pol_route+0x9e3/0x1250 net/ipv6/route.c:1925
Code: 31 e4 e8 80 4c 02 fc 4c 89 e0 f0 4c 0f b1 33 31 ff 49 89 c4 48 89 c6 e8 1b 36 c4 fb 4d 85 e4 0f 84 0d fa ff ff e8 dd 34 c4 fb <0f> 0b e8 d6 34 c4 fb e8 81 a3 ae fb 31 ff 89 c6 88 85 e0 fd ff ff 
netlink: 4 bytes leftover after parsing attributes in process `syz-executor6'.
RSP: 0018:ffff88019f9bed48 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffffe8ffffd6e4e8 RCX: ffffc90005e4c000
RDX: 0000000000040000 RSI: ffffffff85b7e0a3 RDI: 0000000000000007
openvswitch: netlink: IP tunnel dst address not specified
RBP: ffff88019f9bef78 R08: ffff8801b539a080 R09: fffff91ffffadc9d
R10: fffff91ffffadc9d R11: ffffe8ffffd6e4ef R12: ffff8801c7f85e00
R13: 0000000000000001 R14: ffff8801b9bdd540 R15: 0000000000000001
FS:  00007f563ed09700(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb286915000 CR3: 00000001c88cb000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400