IPsec: fix handling of errors for socket policies
Venkat Yekkirala [Thu, 5 Oct 2006 20:42:35 +0000 (15:42 -0500)]
This treats the security errors encountered in the case of
socket policy matching, the same as how these are treated in
the case of main/sub policies, which is to return a full lookup
failure.

Signed-off-by: Venkat Yekkirala <vyekkirala@TrustedCS.com>
Signed-off-by: James Morris <jmorris@namei.org>

net/xfrm/xfrm_policy.c

index 695761f..7736b23 100644 (file)
@@ -1016,12 +1016,16 @@ static struct xfrm_policy *xfrm_sk_policy_lookup(struct sock *sk, int dir, struc
                                                sk->sk_family);
                int err = 0;
 
-               if (match)
-                 err = security_xfrm_policy_lookup(pol, fl->secid, policy_to_flow_dir(dir));
-
-               if (match && !err)
-                       xfrm_pol_hold(pol);
-               else
+               if (match) {
+                       err = security_xfrm_policy_lookup(pol, fl->secid,
+                                       policy_to_flow_dir(dir));
+                       if (!err)
+                               xfrm_pol_hold(pol);
+                       else if (err == -ESRCH)
+                               pol = NULL;
+                       else
+                               pol = ERR_PTR(err);
+               } else
                        pol = NULL;
        }
        read_unlock_bh(&xfrm_policy_lock);
@@ -1313,8 +1317,11 @@ restart:
        pol_dead = 0;
        xfrm_nr = 0;
 
-       if (sk && sk->sk_policy[1])
+       if (sk && sk->sk_policy[1]) {
                policy = xfrm_sk_policy_lookup(sk, XFRM_POLICY_OUT, fl);
+               if (IS_ERR(policy))
+                       return PTR_ERR(policy);
+       }
 
        if (!policy) {
                /* To accelerate a bit...  */
@@ -1607,8 +1614,11 @@ int __xfrm_policy_check(struct sock *sk, int dir, struct sk_buff *skb,
        }
 
        pol = NULL;
-       if (sk && sk->sk_policy[dir])
+       if (sk && sk->sk_policy[dir]) {
                pol = xfrm_sk_policy_lookup(sk, dir, &fl);
+               if (IS_ERR(pol))
+                       return 0;
+       }
 
        if (!pol)
                pol = flow_cache_lookup(&fl, family, fl_dir,