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authorJiri Benc <jbenc@redhat.com>2016-05-03 18:10:06 +0300
committerDavid S. Miller <davem@davemloft.net>2016-05-04 21:11:31 +0300
commit00b2034029840ddad255352c46db0ae21342ce56 (patch)
tree043bf1c60ccdf86257a34c61b629726247a9d1c8 /net/ipv4
parent3f7496aa72d3411579f996eb3998d1441906e99d (diff)
downloadlinux-00b2034029840ddad255352c46db0ae21342ce56.tar.xz
gre: remove superfluous pskb_may_pull
The call to gre_parse_header is either followed by iptunnel_pull_header, or in the case of ICMP error path, the actual header is not accessed at all. In the first case, iptunnel_pull_header will call pskb_may_pull anyway and it's pointless to do it twice. The only difference is what call will fail with what error code but the net effect is still the same in all call sites. In the second case, pskb_may_pull is pointless, as skb->data is at the outer IP header and not at the GRE header. Signed-off-by: Jiri Benc <jbenc@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/gre_demux.c5
1 files changed, 1 insertions, 4 deletions
diff --git a/net/ipv4/gre_demux.c b/net/ipv4/gre_demux.c
index a41e73ab1369..d78e2eefc0f7 100644
--- a/net/ipv4/gre_demux.c
+++ b/net/ipv4/gre_demux.c
@@ -114,11 +114,8 @@ int gre_parse_header(struct sk_buff *skb, struct tnl_ptk_info *tpi,
*/
if (greh->flags == 0 && tpi->proto == htons(ETH_P_WCCP)) {
tpi->proto = htons(ETH_P_IP);
- if ((*(u8 *)options & 0xF0) != 0x40) {
+ if ((*(u8 *)options & 0xF0) != 0x40)
hdr_len += 4;
- if (!pskb_may_pull(skb, hdr_len))
- return -EINVAL;
- }
}
return hdr_len;
}