syzbot

BUG: looking up invalid subclass: 8
turning off the locking correctness validator.
CPU: 1 PID: 8311 Comm: syz-executor270 Not tainted 4.19.202-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 look_up_lock_class kernel/locking/lockdep.c:662 [inline]
 register_lock_class+0x3d8/0x11c0 kernel/locking/lockdep.c:749
 __lockdep_init_map+0x263/0x5a0 kernel/locking/lockdep.c:3215
 vlan_dev_set_lockdep_class net/8021q/vlan_dev.c:511 [inline]
 vlan_dev_init+0x780/0xc80 net/8021q/vlan_dev.c:606
 register_netdevice+0x2dc/0x10f0 net/core/dev.c:8660
 register_vlan_dev+0x2f1/0x7d0 net/8021q/vlan.c:172
 vlan_newlink+0x477/0x6d0 net/8021q/vlan_netlink.c:189
 rtnl_newlink+0x1030/0x15c0 net/core/rtnetlink.c:3141
 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782
 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2457
 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]
 netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1346
 netlink_sendmsg+0x6bb/0xc40 net/netlink/af_netlink.c:1911
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0xc3/0x120 net/socket.c:661
 ___sys_sendmsg+0x7bb/0x8e0 net/socket.c:2225
 __sys_sendmsg net/socket.c:2263 [inline]
 __do_sys_sendmsg net/socket.c:2272 [inline]
 __se_sys_sendmsg net/socket.c:2270 [inline]
 __x64_sys_sendmsg+0x132/0x220 net/socket.c:2270
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x443c79
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 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 c4 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffef5fb0378 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000443c79
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000004
RBP: 0000000000000000 R08: 00007ffef5fb03b0 R09: 00007ffef5fb03b0
R10: 00007ffef5fb03b0 R11: 0000000000000246 R12: 0000000000089118
R13: 00007ffef5fb03b0 R14: 00007ffef5fb03a0 R15: 00007ffef5fb0394
syz-executor270 (8402) used greatest stack depth: 23288 bytes left
syz-executor270 (8480) used greatest stack depth: 23032 bytes left
syz-executor270 (8523) used greatest stack depth: 23016 bytes left
syz-executor270 (8550) used greatest stack depth: 23000 bytes left
nla_parse: 137 callbacks suppressed
netlink: 12 bytes leftover after parsing attributes in process `syz-executor270'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor270'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor270'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor270'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor270'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor270'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor270'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor270'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor270'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor270'.
syz-executor270 (8719) used greatest stack depth: 22784 bytes left
nla_parse: 123 callbacks suppressed
netlink: 12 bytes leftover after parsing attributes in process `syz-executor270'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor270'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor270'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor270'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor270'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor270'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor270'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor270'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor270'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor270'.