Message ID | 1438603721-28320-8-git-send-email-stefanha@redhat.com |
---|---|
State | New |
Headers | show |
diff --git a/hw/net/rtl8139.c b/hw/net/rtl8139.c index fa01934..edbb61c 100644 --- a/hw/net/rtl8139.c +++ b/hw/net/rtl8139.c @@ -2239,6 +2239,11 @@ static int rtl8139_cplus_transmit_one(RTL8139State *s) int tcp_hlen = TCP_HEADER_DATA_OFFSET(p_tcp_hdr); + /* Invalid TCP data offset? */ + if (tcp_hlen < sizeof(tcp_header) || tcp_hlen > ip_data_len) { + goto skip_offload; + } + /* ETH_MTU = ip header len + tcp header len + payload */ int tcp_data_len = ip_data_len - tcp_hlen; int tcp_chunk_size = ETH_MTU - hlen - tcp_hlen;