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ipvs: ip_vs_sh: ip_vs_sh_get_port: check skb_header_pointer for NULL

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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@redhat.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
This commit is contained in:
Daniel Borkmann 2013-08-06 11:20:23 +02:00 committed by Simon Horman
parent 70e3ca79cd
commit 54e35cc523
1 changed files with 6 additions and 0 deletions
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6
net/netfilter/ipvs/ip_vs_sh.c
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@ -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: