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netfilter: nft_osf: check for TCP packet before further processing
[linux-2.6-microblaze.git]
/
net
/
netfilter
/
nft_osf.c
diff --git
a/net/netfilter/nft_osf.c
b/net/netfilter/nft_osf.c
index
ac61f70
..
d82677e
100644
(file)
--- a/
net/netfilter/nft_osf.c
+++ b/
net/netfilter/nft_osf.c
@@
-28,6
+28,11
@@
static void nft_osf_eval(const struct nft_expr *expr, struct nft_regs *regs,
struct nf_osf_data data;
struct tcphdr _tcph;
+ if (pkt->tprot != IPPROTO_TCP) {
+ regs->verdict.code = NFT_BREAK;
+ return;
+ }
+
tcp = skb_header_pointer(skb, ip_hdrlen(skb),
sizeof(struct tcphdr), &_tcph);
if (!tcp) {