From: Tomasz Duszynski <tdu@semihalf.com>
To: dev@dpdk.org
Cc: Tomasz Duszynski <tdu@semihalf.com>, stable@dpdk.org
Subject: [dpdk-stable] [PATCH] examples/ipsec-secgw: fix ip version check
Date: Fri, 13 Oct 2017 14:50:09 +0200 [thread overview]
Message-ID: <1507899009-20393-1-git-send-email-tdu@semihalf.com> (raw)
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@dpdk.org
Signed-off-by: Tomasz Duszynski <tdu@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 {
--
2.7.4
next reply other threads:[~2017-10-13 12:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-13 12:50 Tomasz Duszynski [this message]
2017-10-16 9:56 ` [dpdk-stable] [dpdk-dev] " Sergio Gonzalez Monroy
2017-10-16 10:43 ` Aviad Yehezkel
2017-10-16 14:46 ` De Lara Guarch, Pablo
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