diff options
| author | Nick Bowler <nbowler@elliptictech.com> | 2011-11-08 12:12:45 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-12-09 08:55:57 -0800 |
| commit | f82c753512bfe2fb4127ee72c882924120c11de8 (patch) | |
| tree | 4169d11e2952ec0ac1d5ef9ed622c6d5b0622629 | |
| parent | cfa73cca0cac4e07cc963f332aead8d118707432 (diff) | |
| download | lwn-f82c753512bfe2fb4127ee72c882924120c11de8.tar.gz lwn-f82c753512bfe2fb4127ee72c882924120c11de8.zip | |
ah: Read nexthdr value before overwriting it in ahash input callback.
[ Upstream commit b7ea81a58adc123a4e980cb0eff9eb5c144b5dc7 ]
The AH4/6 ahash input callbacks read out the nexthdr field from the AH
header *after* they overwrite that header. This is obviously not going
to end well. Fix it up.
Signed-off-by: Nick Bowler <nbowler@elliptictech.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | net/ipv4/ah4.c | 4 | ||||
| -rw-r--r-- | net/ipv6/ah6.c | 4 |
2 files changed, 4 insertions, 4 deletions
diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c index 33ca18603e3b..c7056b2e831f 100644 --- a/net/ipv4/ah4.c +++ b/net/ipv4/ah4.c @@ -262,12 +262,12 @@ static void ah_input_done(struct crypto_async_request *base, int err) if (err) goto out; + err = ah->nexthdr; + skb->network_header += ah_hlen; memcpy(skb_network_header(skb), work_iph, ihl); __skb_pull(skb, ah_hlen + ihl); skb_set_transport_header(skb, -ihl); - - err = ah->nexthdr; out: kfree(AH_SKB_CB(skb)->tmp); xfrm_input_resume(skb, err); diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c index ede4d9d6cc2b..7a33aaa00227 100644 --- a/net/ipv6/ah6.c +++ b/net/ipv6/ah6.c @@ -464,12 +464,12 @@ static void ah6_input_done(struct crypto_async_request *base, int err) if (err) goto out; + err = ah->nexthdr; + skb->network_header += ah_hlen; memcpy(skb_network_header(skb), work_iph, hdr_len); __skb_pull(skb, ah_hlen + hdr_len); skb_set_transport_header(skb, -hdr_len); - - err = ah->nexthdr; out: kfree(AH_SKB_CB(skb)->tmp); xfrm_input_resume(skb, err); |