On Tue, Aug 06, 2013 at 11:20:23AM +0200, Daniel Borkmann wrote:
> 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.
Thanks, I have queued-this patch up in ipvs-next as you suggested.
>
> 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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