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authorHerbert Xu <herbert@gondor.apana.org.au>2007-12-11 04:38:08 -0800
committerDavid S. Miller <davem@davemloft.net>2007-12-11 04:38:08 -0800
commit75b8c133267053c9986a7c8db5131f0e7349e806 (patch)
tree264a44a1882196c894f1af84baf7fbba7698678c /net/xfrm
parent3f03e387893ffa07a4d5dac96772f9db3221a185 (diff)
[IPSEC]: Fix potential dst leak in xfrm_lookup
If we get an error during the actual policy lookup we don't free the original dst while the caller expects us to always free the original dst in case of error. This patch fixes that. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/xfrm')
-rw-r--r--net/xfrm/xfrm_policy.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 9a4cf2e45a1..b91b16671c1 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1318,8 +1318,9 @@ restart:
if (sk && sk->sk_policy[XFRM_POLICY_OUT]) {
policy = xfrm_sk_policy_lookup(sk, XFRM_POLICY_OUT, fl);
+ err = PTR_ERR(policy);
if (IS_ERR(policy))
- return PTR_ERR(policy);
+ goto dropdst;
}
if (!policy) {
@@ -1330,8 +1331,9 @@ restart:
policy = flow_cache_lookup(fl, dst_orig->ops->family,
dir, xfrm_policy_lookup);
+ err = PTR_ERR(policy);
if (IS_ERR(policy))
- return PTR_ERR(policy);
+ goto dropdst;
}
if (!policy)
@@ -1501,8 +1503,9 @@ restart:
return 0;
error:
- dst_release(dst_orig);
xfrm_pols_put(pols, npols);
+dropdst:
+ dst_release(dst_orig);
*dst_p = NULL;
return err;
}