[dpdk-dev] [PATCH] examples/ipsec-secgw: fix ip version check

[Aviad Yehezkel]

Reviewed-by: Aviad Yehezkel <aviadye at mellanox.com>


On 10/16/2017 12:56 PM, Sergio Gonzalez Monroy wrote:
> 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: stable at dpdk.org
>>
>> Signed-off-by: Tomasz Duszynski <tdu at 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.monroy at intel.com>
>