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authorLionel Gauthier <Lionel.Gauthier@eurecom.fr>2016-12-15 22:35:52 +0100
committerDavid S. Miller <davem@davemloft.net>2016-12-17 12:00:25 -0500
commit88edf10315c8d72db70d39f3851cf2c91abdb634 (patch)
treee33e423488d1ba5821e9f3ed2a133190804924f2 /drivers/net/gtp.c
parente999cb43d51f3635afd6253c5c066798ad998255 (diff)
downloadlinux-88edf10315c8d72db70d39f3851cf2c91abdb634.tar.bz2
gtp: gtp_check_src_ms_ipv4() always return success
gtp_check_src_ms_ipv4() did not find the PDP context matching with the UE IP address because the memory location is not right, but the result is inverted by the Boolean "not" operator. So whatever is the PDP context, any call to this function is successful. Signed-off-by: Lionel Gauthier <Lionel.Gauthier@eurecom.fr> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/gtp.c')
-rw-r--r--drivers/net/gtp.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c
index 98f10c216521..6031d499f2be 100644
--- a/drivers/net/gtp.c
+++ b/drivers/net/gtp.c
@@ -158,9 +158,9 @@ static bool gtp_check_src_ms_ipv4(struct sk_buff *skb, struct pdp_ctx *pctx,
if (!pskb_may_pull(skb, hdrlen + sizeof(struct iphdr)))
return false;
- iph = (struct iphdr *)(skb->data + hdrlen + sizeof(struct iphdr));
+ iph = (struct iphdr *)(skb->data + hdrlen);
- return iph->saddr != pctx->ms_addr_ip4.s_addr;
+ return iph->saddr == pctx->ms_addr_ip4.s_addr;
}
/* Check if the inner IP source address in this packet is assigned to any