path: root/net/ipv4/ipcomp.c
diff options
authorHerbert Xu <herbert@gondor.apana.org.au>2008-01-29 21:11:46 -0800
committerDavid S. Miller <davem@davemloft.net>2008-01-31 19:27:11 -0800
commit2614fa59fa805cd488083c5602eb48533cdbc018 (patch)
tree604fcae5cb381eadb8d8e13e0bef42a7e0c13d11 /net/ipv4/ipcomp.c
parent[IPV4] fib_trie: apply fixes from fib_hash (diff)
[IPCOMP]: Fetch nexthdr before ipch is destroyed
When I moved the nexthdr setting out of IPComp I accidently moved the reading of ipch->nexthdr after the decompression. Unfortunately this means that we'd be reading from a stale ipch pointer which doesn't work very well. This patch moves the reading up so that we get the correct nexthdr value. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
1 files changed, 4 insertions, 1 deletions
diff --git a/net/ipv4/ipcomp.c b/net/ipv4/ipcomp.c
index f4af99ad8fdb..b79cdbee68a9 100644
--- a/net/ipv4/ipcomp.c
+++ b/net/ipv4/ipcomp.c
@@ -74,6 +74,7 @@ out:
static int ipcomp_input(struct xfrm_state *x, struct sk_buff *skb)
+ int nexthdr;
int err = -ENOMEM;
struct ip_comp_hdr *ipch;
@@ -84,13 +85,15 @@ static int ipcomp_input(struct xfrm_state *x, struct sk_buff *skb)
/* Remove ipcomp header and decompress original payload */
ipch = (void *)skb->data;
+ nexthdr = ipch->nexthdr;
skb->transport_header = skb->network_header + sizeof(*ipch);
__skb_pull(skb, sizeof(*ipch));
err = ipcomp_decompress(x, skb);
if (err)
goto out;
- err = ipch->nexthdr;
+ err = nexthdr;
return err;