[XFRM]: Always release dst_entry on error in xfrm_lookup

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv4/netfilter/ipt_REJECT.c b/net/ipv4/netfilter/ipt_REJECT.c
index f115a84..f057025 100644 (file)
--- a/net/ipv4/netfilter/ipt_REJECT.c
+++ b/net/ipv4/netfilter/ipt_REJECT.c
@@ -92,10 +92,7 @@ static inline struct rtable *route_reverse(struct sk_buff *skb,
        fl.fl_ip_sport = tcph->dest;
        fl.fl_ip_dport = tcph->source;
 
-       if (xfrm_lookup((struct dst_entry **)&rt, &fl, NULL, 0)) {
-               dst_release(&rt->u.dst);
-               rt = NULL;
-       }
+       xfrm_lookup((struct dst_entry **)&rt, &fl, NULL, 0);
 
        return rt;
 }

diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index 157cec6..cc51840 100644 (file)
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -175,10 +175,8 @@ ipv4_connected:
        if (final_p)
                ipv6_addr_copy(&fl.fl6_dst, final_p);
 
-       if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) {
-               dst_release(dst);
+       if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
                goto out;
-       }
 
        /* source address lookup done in ip6_dst_lookup */
 

diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 34e99c5..b7185fb 100644 (file)
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -374,7 +374,7 @@ void icmpv6_send(struct sk_buff *skb, int type, int code, __u32 info,
        if (err)
                goto out;
        if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
-               goto out_dst_release;
+               goto out;
 
        if (ipv6_addr_is_multicast(&fl.fl6_dst))
                hlimit = np->mcast_hops;
@@ -469,7 +469,7 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
        if (err)
                goto out;
        if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
-               goto out_dst_release;
+               goto out;
 
        if (ipv6_addr_is_multicast(&fl.fl6_dst))
                hlimit = np->mcast_hops;
@@ -505,7 +505,6 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
 out_put: 
        if (likely(idev != NULL))
                in6_dev_put(idev);
-out_dst_release:
        dst_release(dst);
 out: 
        icmpv6_xmit_unlock();

diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index a7eae30..555a313 100644 (file)
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -447,10 +447,8 @@ static void ndisc_send_na(struct net_device *dev, struct neighbour *neigh,
                return;
 
        err = xfrm_lookup(&dst, &fl, NULL, 0);
-       if (err < 0) {
-               dst_release(dst);
+       if (err < 0)
                return;
-       }
 
        if (inc_opt) {
                if (dev->addr_len)
@@ -539,10 +537,8 @@ void ndisc_send_ns(struct net_device *dev, struct neighbour *neigh,
                return;
 
        err = xfrm_lookup(&dst, &fl, NULL, 0);
-       if (err < 0) {
-               dst_release(dst);
+       if (err < 0)
                return;
-       }
 
        len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
        send_llinfo = dev->addr_len && !ipv6_addr_any(saddr);
@@ -616,10 +612,8 @@ void ndisc_send_rs(struct net_device *dev, struct in6_addr *saddr,
                return;
 
        err = xfrm_lookup(&dst, &fl, NULL, 0);
-       if (err < 0) {
-               dst_release(dst);
+       if (err < 0)
                return;
-       }
 
        len = sizeof(struct icmp6hdr);
        if (dev->addr_len)
@@ -1353,10 +1347,8 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
                return;
 
        err = xfrm_lookup(&dst, &fl, NULL, 0);
-       if (err) {
-               dst_release(dst);
+       if (err)
                return;
-       }
 
        rt = (struct rt6_info *) dst;
 

diff --git a/net/ipv6/netfilter/ip6t_REJECT.c b/net/ipv6/netfilter/ip6t_REJECT.c
index 14316c3..b03e87a 100644 (file)
--- a/net/ipv6/netfilter/ip6t_REJECT.c
+++ b/net/ipv6/netfilter/ip6t_REJECT.c
@@ -100,11 +100,8 @@ static void send_reset(struct sk_buff *oldskb)
        dst = ip6_route_output(NULL, &fl);
        if (dst == NULL)
                return;
-       if (dst->error ||
-           xfrm_lookup(&dst, &fl, NULL, 0)) {
-               dst_release(dst);
+       if (dst->error || xfrm_lookup(&dst, &fl, NULL, 0))
                return;
-       }
 
        hh_len = (dst->dev->hard_header_len + 15)&~15;
        nskb = alloc_skb(hh_len + 15 + dst->header_len + sizeof(struct ipv6hdr)

diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 2ad3789..5aa3691 100644 (file)
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -782,10 +782,8 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk,
        if (final_p)
                ipv6_addr_copy(&fl.fl6_dst, final_p);
 
-       if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) {
-               dst_release(dst);
+       if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
                goto out;
-       }
 
        if (hlimit < 0) {
                if (ipv6_addr_is_multicast(&fl.fl6_dst))

diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 246414b..80643e6 100644 (file)
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -632,10 +632,8 @@ static int tcp_v6_connect(struct sock *sk, struct sockaddr *uaddr,
        if (final_p)
                ipv6_addr_copy(&fl.fl6_dst, final_p);
 
-       if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) {
-               dst_release(dst);
+       if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0)
                goto failure;
-       }
 
        if (saddr == NULL) {
                saddr = &fl.fl6_src;
@@ -888,7 +886,6 @@ static int tcp_v6_send_synack(struct sock *sk, struct request_sock *req,
        }
 
 done:
-       dst_release(dst);
         if (opt && opt != np->opt)
                sock_kfree_s(sk, opt, opt->tot_len);
        return err;
@@ -1000,10 +997,8 @@ static void tcp_v6_send_reset(struct sk_buff *skb)
        /* sk = NULL, but it is safe for now. RST socket required. */
        if (!ip6_dst_lookup(NULL, &buff->dst, &fl)) {
 
-               if ((xfrm_lookup(&buff->dst, &fl, NULL, 0)) < 0) {
-                       dst_release(buff->dst);
+               if ((xfrm_lookup(&buff->dst, &fl, NULL, 0)) < 0)
                        return;
-               }
 
                ip6_xmit(NULL, buff, &fl, NULL, 0);
                TCP_INC_STATS_BH(TCP_MIB_OUTSEGS);
@@ -1067,10 +1062,8 @@ static void tcp_v6_send_ack(struct sk_buff *skb, u32 seq, u32 ack, u32 win, u32
        fl.fl_ip_sport = t1->source;
 
        if (!ip6_dst_lookup(NULL, &buff->dst, &fl)) {
-               if ((xfrm_lookup(&buff->dst, &fl, NULL, 0)) < 0) {
-                       dst_release(buff->dst);
+               if ((xfrm_lookup(&buff->dst, &fl, NULL, 0)) < 0)
                        return;
-               }
                ip6_xmit(NULL, buff, &fl, NULL, 0);
                TCP_INC_STATS_BH(TCP_MIB_OUTSEGS);
                return;
@@ -1733,7 +1726,6 @@ static int tcp_v6_rebuild_header(struct sock *sk)
 
                if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) {
                        sk->sk_err_soft = -err;
-                       dst_release(dst);
                        return err;
                }
 
@@ -1786,7 +1778,6 @@ static int tcp_v6_xmit(struct sk_buff *skb, int ipfragok)
 
                if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) {
                        sk->sk_route_caps = 0;
-                       dst_release(dst);
                        return err;
                }
 

diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index f5ae148..69b1468 100644 (file)
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -799,10 +799,8 @@ do_udp_sendmsg:
        if (final_p)
                ipv6_addr_copy(&fl->fl6_dst, final_p);
 
-       if ((err = xfrm_lookup(&dst, fl, sk, 0)) < 0) {
-               dst_release(dst);
+       if ((err = xfrm_lookup(&dst, fl, sk, 0)) < 0)
                goto out;
-       }
 
        if (hlimit < 0) {
                if (ipv6_addr_is_multicast(&fl->fl6_dst))

diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 83c8135..fda737d 100644 (file)
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -765,8 +765,8 @@ restart:
        switch (policy->action) {
        case XFRM_POLICY_BLOCK:
                /* Prohibit the flow */
-               xfrm_pol_put(policy);
-               return -EPERM;
+               err = -EPERM;
+               goto error;
 
        case XFRM_POLICY_ALLOW:
                if (policy->xfrm_nr == 0) {
@@ -782,8 +782,8 @@ restart:
                 */
                dst = xfrm_find_bundle(fl, policy, family);
                if (IS_ERR(dst)) {
-                       xfrm_pol_put(policy);
-                       return PTR_ERR(dst);
+                       err = PTR_ERR(dst);
+                       goto error;
                }
 
                if (dst)