================================================================================
UBSAN: Undefined behaviour in net/netfilter/nf_nat_core.c:67:9
index 230 is out of range for type 'nf_nat_l3proto *[13]'
CPU: 0 PID: 11238 Comm: syz-executor.1 Not tainted 4.19.148-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+0x22c/0x33e lib/dump_stack.c:118
 ubsan_epilogue+0xe/0x3a lib/ubsan.c:161
 __ubsan_handle_out_of_bounds.cold+0x63/0x6f lib/ubsan.c:383
 __nf_nat_l3proto_find net/netfilter/nf_nat_core.c:67 [inline]
 nfnetlink_parse_nat_setup+0x68c/0x750 net/netfilter/nf_nat_core.c:876
 ctnetlink_parse_nat_setup+0xd6/0x760 net/netfilter/nf_conntrack_netlink.c:1521
 ctnetlink_setup_nat net/netfilter/nf_conntrack_netlink.c:1591 [inline]
 ctnetlink_create_conntrack+0x48f/0x1350 net/netfilter/nf_conntrack_netlink.c:1984
 ctnetlink_new_conntrack+0x4f3/0xdb0 net/netfilter/nf_conntrack_netlink.c:2114
 nfnetlink_rcv_msg+0xeff/0x1210 net/netfilter/nfnetlink.c:233
 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2455
 nfnetlink_rcv+0x1b2/0x41b net/netfilter/nfnetlink.c:565
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x717/0xcc0 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xc7/0x130 net/socket.c:632
 ___sys_sendmsg+0x7bb/0x8f0 net/socket.c:2115
 __sys_sendmsg net/socket.c:2153 [inline]
 __do_sys_sendmsg net/socket.c:2162 [inline]
 __se_sys_sendmsg net/socket.c:2160 [inline]
 __x64_sys_sendmsg+0x132/0x220 net/socket.c:2160
 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45e179
Code: 3d b2 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 0b b2 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f6d912abc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000002ab40 RCX: 000000000045e179
RDX: 0000000000000000 RSI: 0000000020000580 RDI: 0000000000000003
RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c
R13: 00007ffd1de60c9f R14: 00007f6d912ac9c0 R15: 000000000118cf4c
================================================================================
ptrace attach of "/root/syz-executor.3"[11260] was attempted by "/root/syz-executor.3"[11263]
IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready
syz-executor.3 uses obsolete (PF_INET,SOCK_PACKET)
nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based  firewall rule not found. Use the iptables CT target to attach helpers instead.
ptrace attach of "/root/syz-executor.2"[11590] was attempted by "/root/syz-executor.2"[11592]
ptrace attach of "/root/syz-executor.5"[11593] was attempted by "/root/syz-executor.5"[11595]
netlink: 'syz-executor.5': attribute type 3 has an invalid length.
EXT4-fs (loop5): warning: mounting unchecked fs, running e2fsck is recommended
EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue
IPVS: ftp: loaded support on port[0] = 21
IPVS: ftp: loaded support on port[0] = 21
xt_CT: No such helper "snmp_trap"