diff options
| -rw-r--r-- | pkg/tcpip/network/ipv4/icmp.go | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/pkg/tcpip/network/ipv4/icmp.go b/pkg/tcpip/network/ipv4/icmp.go index 3eff0bbd8..59acbad02 100644 --- a/pkg/tcpip/network/ipv4/icmp.go +++ b/pkg/tcpip/network/ipv4/icmp.go @@ -572,6 +572,10 @@ func (p *protocol) returnError(reason icmpReason, pkt *stack.PacketBuffer) tcpip // if problems arise this could be reversed. It was judged less of a breach // of protocol to not respond to unknown non-error packets than to respond // to unknown error packets so we take the first approach. + if len(transportHeader) < header.ICMPv4MinimumSize { + // The packet is malformed. + return nil + } switch header.ICMPv4(transportHeader).Type() { case header.ICMPv4EchoReply, |