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authorGao feng <gaofeng@cn.fujitsu.com>2012-03-19 22:36:10 +0000
committerDavid S. Miller <davem@davemloft.net>2012-03-20 05:39:34 -0400
commit1f85851e17b64cabd089a8a8839dddebc627948c (patch)
treea7a23af86a8241f09cff1602786bd7e26a120d17 /net
parent5c473ed26dba609622c9a625f896f8f59d86066c (diff)
ipv6: fix incorrent ipv6 ipsec packet fragment
Since commit 299b0767(ipv6: Fix IPsec slowpath fragmentation problem) In func ip6_append_data,after call skb_put(skb, fraglen + dst_exthdrlen) the skb->len contains dst_exthdrlen,and we don't reduce dst_exthdrlen at last This will make fraggap>0 in next "while cycle",and cause the size of skb incorrent Fix this by reserve headroom for dst_exthdrlen. Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com> Acked-by: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv6/ip6_output.c11
1 files changed, 6 insertions, 5 deletions
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 7a98fc2a5d9..b7ca46161cb 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -1414,8 +1414,9 @@ alloc_new_skb:
*/
skb->ip_summed = csummode;
skb->csum = 0;
- /* reserve for fragmentation */
- skb_reserve(skb, hh_len+sizeof(struct frag_hdr));
+ /* reserve for fragmentation and ipsec header */
+ skb_reserve(skb, hh_len + sizeof(struct frag_hdr) +
+ dst_exthdrlen);
if (sk->sk_type == SOCK_DGRAM)
skb_shinfo(skb)->tx_flags = tx_flags;
@@ -1423,9 +1424,9 @@ alloc_new_skb:
/*
* Find where to start putting bytes
*/
- data = skb_put(skb, fraglen + dst_exthdrlen);
- skb_set_network_header(skb, exthdrlen + dst_exthdrlen);
- data += fragheaderlen + dst_exthdrlen;
+ data = skb_put(skb, fraglen);
+ skb_set_network_header(skb, exthdrlen);
+ data += fragheaderlen;
skb->transport_header = (skb->network_header +
fragheaderlen);
if (fraggap) {