syzbot

IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready
batman_adv: batadv0: Interface activated: batadv_slave_1
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
netlink: 'syz-executor394': attribute type 2 has an invalid length.
------------[ cut here ]------------
kernel BUG at net/phonet/socket.c:226!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 8101 Comm: syz-executor394 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:pn_socket_autobind net/phonet/socket.c:226 [inline]
RIP: 0010:pn_socket_autobind net/phonet/socket.c:226 [inline] net/phonet/socket.c:215
RIP: 0010:pn_socket_autobind+0x13c/0x160 net/phonet/socket.c:215 net/phonet/socket.c:215
Code: 44 05 00 00 00 00 00 48 8b 44 24 58 65 48 2b 04 25 28 00 00 00 75 26 48 83 c4 60 44 89 e0 5b 5d 41 5c 41 5d c3 e8 24 6c fd f9 <0f> 0b e8 ed 47 33 fa eb 9f e8 06 49 33 fa e9 6d ff ff ff e8 9c 8c
RSP: 0018:ffff8880b268fc38 EFLAGS: 00010293
RAX: ffff888098854540 RBX: 0000000000000000 RCX: ffffffff8765190c
RDX: 0000000000000000 RSI: ffffffff8765194c RDI: 0000000000000003
RBP: 1ffff110164d1f87 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: 7fffffffffffffff
FS:  00005555565b9300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000740 CR3: 00000000a9623000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 pn_socket_connect+0x100/0x8c0 net/phonet/socket.c:240 net/phonet/socket.c:240
 __sys_connect+0x265/0x2c0 net/socket.c:1775 net/socket.c:1775
 __do_sys_connect net/socket.c:1786 [inline]
 __se_sys_connect net/socket.c:1783 [inline]
 __do_sys_connect net/socket.c:1786 [inline] net/socket.c:1783
 __se_sys_connect net/socket.c:1783 [inline] net/socket.c:1783
 __x64_sys_connect+0x6f/0xb0 net/socket.c:1783 net/socket.c:1783
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7facfac394b9
Code: 28 c3 e8 4a 15 00 00 66 2e 0f 1f 84 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffddc8102e8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007ffddc8102f8 RCX: 00007facfac394b9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffddc810300
R13: 00007ffddc810320 R14: 0000000000000000 R15: 0000000000000000
Modules linked in:
---[ end trace c428b09b9350b47c ]---
RIP: 0010:pn_socket_autobind net/phonet/socket.c:226 [inline]
RIP: 0010:pn_socket_autobind net/phonet/socket.c:226 [inline] net/phonet/socket.c:215
RIP: 0010:pn_socket_autobind+0x13c/0x160 net/phonet/socket.c:215 net/phonet/socket.c:215
Code: 44 05 00 00 00 00 00 48 8b 44 24 58 65 48 2b 04 25 28 00 00 00 75 26 48 83 c4 60 44 89 e0 5b 5d 41 5c 41 5d c3 e8 24 6c fd f9 <0f> 0b e8 ed 47 33 fa eb 9f e8 06 49 33 fa e9 6d ff ff ff e8 9c 8c
RSP: 0018:ffff8880b268fc38 EFLAGS: 00010293
RAX: ffff888098854540 RBX: 0000000000000000 RCX: ffffffff8765190c
RDX: 0000000000000000 RSI: ffffffff8765194c RDI: 0000000000000003
RBP: 1ffff110164d1f87 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: 7fffffffffffffff
FS:  00005555565b9300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f06dec50000 CR3: 00000000a9623000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400