skb_header_pointer could return NULL, so check for it as we do it
everywhere else in ipvs code. This fixes a coverity warning.
Signed-off-by: Daniel Borkmann <dborkman@xxxxxxxxxx>
---
I'd consider the case of NULL quite unlikely, therefore ipvs-next should
be sufficient.
net/netfilter/ipvs/ip_vs_sh.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/net/netfilter/ipvs/ip_vs_sh.c b/net/netfilter/ipvs/ip_vs_sh.c
index f16c027..3588fae 100644
--- a/net/netfilter/ipvs/ip_vs_sh.c
+++ b/net/netfilter/ipvs/ip_vs_sh.c
@@ -269,14 +269,20 @@ ip_vs_sh_get_port(const struct sk_buff *skb, struct ip_vs_iphdr *iph)
switch (iph->protocol) {
case IPPROTO_TCP:
th = skb_header_pointer(skb, iph->len, sizeof(_tcph), &_tcph);
+ if (unlikely(th == NULL))
+ return 0;
port = th->source;
break;
case IPPROTO_UDP:
uh = skb_header_pointer(skb, iph->len, sizeof(_udph), &_udph);
+ if (unlikely(uh == NULL))
+ return 0;
port = uh->source;
break;
case IPPROTO_SCTP:
sh = skb_header_pointer(skb, iph->len, sizeof(_sctph), &_sctph);
+ if (unlikely(sh == NULL))
+ return 0;
port = sh->source;
break;
default:
--
1.7.11.7
--
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