diff options
| author | Gao feng <gaofeng@cn.fujitsu.com> | 2012-03-19 22:36:10 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-04-02 09:53:08 -0700 |
| commit | 0cff40794bd89b8218f64f8fe058fbf67835fc2f (patch) | |
| tree | a49f4096ae4e18d0db3004b2407826df6f233abc | |
| parent | 9ec476d98f2ee3e851549e2a926a3db9477f4807 (diff) | |
ipv6: fix incorrent ipv6 ipsec packet fragment
[ Upstream commit 1f85851e17b64cabd089a8a8839dddebc627948c ]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/ipv6/ip6_output.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index ec562713db9b..f7f07e2e7c1a 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -1411,8 +1411,9 @@ 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; @@ -1420,9 +1421,9 @@ 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) { |