On 13/10/2017 13:50, Tomasz Duszynski wrote:
Since new_ip and ip4 are overlapping buffers copying ip4 over new_ip using memmove() might overwrite memory at ip4. This could happen if following condition holds:ip_hdr_len > sizeof(struct esp_hdr) + sa->iv_len Thus using ip4 to check ip version is wrong as it might not contain proper value. Fixes: f159e70b0922 ("examples/ipsec-secgw: support transport mode") Cc: sta...@dpdk.org Signed-off-by: Tomasz Duszynski <t...@semihalf.com> --- examples/ipsec-secgw/esp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/examples/ipsec-secgw/esp.c b/examples/ipsec-secgw/esp.c index 2897840..063e63f 100644 --- a/examples/ipsec-secgw/esp.c +++ b/examples/ipsec-secgw/esp.c @@ -307,8 +307,8 @@ esp_outbound(struct rte_mbuf *m, struct ipsec_sa *sa, sizeof(struct esp_hdr) + sa->iv_len); memmove(new_ip, ip4, ip_hdr_len); esp = (struct esp_hdr *)(new_ip + ip_hdr_len); + ip4 = (struct ip *)new_ip; if (likely(ip4->ip_v == IPVERSION)) { - ip4 = (struct ip *)new_ip; ip4->ip_p = IPPROTO_ESP; ip4->ip_len = htons(rte_pktmbuf_data_len(m)); } else {
Acked-by: Sergio Gonzalez Monroy <sergio.gonzalez.mon...@intel.com>
