1 files changed, 93 insertions, 44 deletions

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 4e5989d584ce..1dc935f7b919 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -3328,8 +3328,9 @@ static int selinux_socket_unix_stream_connect(struct socket *sock,
         /* server child socket */
         ssec = newsk->sk_security;
         ssec->peer_sid = isec->sid;
-        
-        return 0;
+        err = security_sid_mls_copy(other_isec->sid, ssec->peer_sid, &ssec->sid);
+
+        return err;
 }
 
 static int selinux_socket_unix_may_send(struct socket *sock,
@@ -3355,11 +3356,29 @@ static int selinux_socket_unix_may_send(struct socket *sock,
 }
 
 static int selinux_sock_rcv_skb_compat(struct sock *sk, struct sk_buff *skb,
-                struct avc_audit_data *ad, u32 sock_sid, u16 sock_class,
-                u16 family, char *addrp, int len)
+                struct avc_audit_data *ad, u16 family, char *addrp, int len)
 {
         int err = 0;
         u32 netif_perm, node_perm, node_sid, if_sid, recv_perm = 0;
+        struct socket *sock;
+        u16 sock_class = 0;
+        u32 sock_sid = 0;
+
+        read_lock_bh(&sk->sk_callback_lock);
+        sock = sk->sk_socket;
+        if (sock) {
+                struct inode *inode;
+                inode = SOCK_INODE(sock);
+                if (inode) {
+                        struct inode_security_struct *isec;
+                        isec = inode->i_security;
+                        sock_sid = isec->sid;
+                        sock_class = isec->sclass;
+                }
+        }
+        read_unlock_bh(&sk->sk_callback_lock);
+        if (!sock_sid)
+                goto out;
 
         if (!skb->dev)
                 goto out;
@@ -3419,12 +3438,10 @@ out:
 static int selinux_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
 {
         u16 family;
-        u16 sock_class = 0;
         char *addrp;
         int len, err = 0;
-        u32 sock_sid = 0;
-        struct socket *sock;
         struct avc_audit_data ad;
+        struct sk_security_struct *sksec = sk->sk_security;
 
         family = sk->sk_family;
         if (family != PF_INET && family != PF_INET6)
@@ -3434,22 +3451,6 @@ static int selinux_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
         if (family == PF_INET6 && skb->protocol == ntohs(ETH_P_IP))
                 family = PF_INET;
 
-        read_lock_bh(&sk->sk_callback_lock);
-        sock = sk->sk_socket;
-        if (sock) {
-                struct inode *inode;
-                inode = SOCK_INODE(sock);
-                if (inode) {
-                        struct inode_security_struct *isec;
-                        isec = inode->i_security;
-                        sock_sid = isec->sid;
-                        sock_class = isec->sclass;
-                }
-        }
-        read_unlock_bh(&sk->sk_callback_lock);
-        if (!sock_sid)
-                goto out;
-
         AVC_AUDIT_DATA_INIT(&ad, NET);
         ad.u.net.netif = skb->dev ? skb->dev->name : "[unknown]";
         ad.u.net.family = family;
@@ -3459,16 +3460,15 @@ static int selinux_socket_sock_rcv_skb(struct sock *sk, struct sk_buff *skb)
                 goto out;
 
         if (selinux_compat_net)
-                err = selinux_sock_rcv_skb_compat(sk, skb, &ad, sock_sid,
-                                                  sock_class, family,
+                err = selinux_sock_rcv_skb_compat(sk, skb, &ad, family,
                                                   addrp, len);
         else
-                err = avc_has_perm(sock_sid, skb->secmark, SECCLASS_PACKET,
+                err = avc_has_perm(sksec->sid, skb->secmark, SECCLASS_PACKET,
                                    PACKET__RECV, &ad);
         if (err)
                 goto out;
 
-        err = selinux_xfrm_sock_rcv_skb(sock_sid, skb, &ad);
+        err = selinux_xfrm_sock_rcv_skb(sksec->sid, skb, &ad);
 out:    
         return err;
 }
@@ -3572,6 +3572,49 @@ static void selinux_sk_getsecid(struct sock *sk, u32 *secid)
         }
 }
 
+void selinux_sock_graft(struct sock* sk, struct socket *parent)
+{
+        struct inode_security_struct *isec = SOCK_INODE(parent)->i_security;
+        struct sk_security_struct *sksec = sk->sk_security;
+
+        isec->sid = sksec->sid;
+}
+
+int selinux_inet_conn_request(struct sock *sk, struct sk_buff *skb,
+                                           struct request_sock *req)
+{
+        struct sk_security_struct *sksec = sk->sk_security;
+        int err;
+        u32 newsid = 0;
+        u32 peersid;
+
+        err = selinux_xfrm_decode_session(skb, &peersid, 0);
+        BUG_ON(err);
+
+        err = security_sid_mls_copy(sksec->sid, peersid, &newsid);
+        if (err)
+                return err;
+
+        req->secid = newsid;
+        return 0;
+}
+
+void selinux_inet_csk_clone(struct sock *newsk, const struct request_sock *req)
+{
+        struct sk_security_struct *newsksec = newsk->sk_security;
+
+        newsksec->sid = req->secid;
+        /* NOTE: Ideally, we should also get the isec->sid for the
+           new socket in sync, but we don't have the isec available yet.
+           So we will wait until sock_graft to do it, by which
+           time it will have been created and available. */
+}
+
+void selinux_req_classify_flow(const struct request_sock *req, struct flowi *fl)
+{
+        fl->secid = req->secid;
+}
+
 static int selinux_nlmsg_perm(struct sock *sk, struct sk_buff *skb)
 {
         int err = 0;
@@ -3611,12 +3654,24 @@ out:
 #ifdef CONFIG_NETFILTER
 
 static int selinux_ip_postroute_last_compat(struct sock *sk, struct net_device *dev,
-                                            struct inode_security_struct *isec,
                                             struct avc_audit_data *ad,
                                             u16 family, char *addrp, int len)
 {
-        int err;
+        int err = 0;
         u32 netif_perm, node_perm, node_sid, if_sid, send_perm = 0;
+        struct socket *sock;
+        struct inode *inode;
+        struct inode_security_struct *isec;
+
+        sock = sk->sk_socket;
+        if (!sock)
+                goto out;
+
+        inode = SOCK_INODE(sock);
+        if (!inode)
+                goto out;
+
+        isec = inode->i_security;
         
         err = sel_netif_sids(dev, &if_sid, NULL);
         if (err)
@@ -3681,26 +3736,16 @@ static unsigned int selinux_ip_postroute_last(unsigned int hooknum,
         char *addrp;
         int len, err = 0;
         struct sock *sk;
-        struct socket *sock;
-        struct inode *inode;
         struct sk_buff *skb = *pskb;
-        struct inode_security_struct *isec;
         struct avc_audit_data ad;
         struct net_device *dev = (struct net_device *)out;
+        struct sk_security_struct *sksec;
 
         sk = skb->sk;
         if (!sk)
                 goto out;
 
-        sock = sk->sk_socket;
-        if (!sock)
-                goto out;
-
-        inode = SOCK_INODE(sock);
-        if (!inode)
-                goto out;
-
-        isec = inode->i_security;
+        sksec = sk->sk_security;
 
         AVC_AUDIT_DATA_INIT(&ad, NET);
         ad.u.net.netif = dev->name;
@@ -3711,16 +3756,16 @@ static unsigned int selinux_ip_postroute_last(unsigned int hooknum,
                 goto out;
 
         if (selinux_compat_net)
-                err = selinux_ip_postroute_last_compat(sk, dev, isec, &ad,
+                err = selinux_ip_postroute_last_compat(sk, dev, &ad,
                                                        family, addrp, len);
         else
-                err = avc_has_perm(isec->sid, skb->secmark, SECCLASS_PACKET,
+                err = avc_has_perm(sksec->sid, skb->secmark, SECCLASS_PACKET,
                                    PACKET__SEND, &ad);
 
         if (err)
                 goto out;
 
-        err = selinux_xfrm_postroute_last(isec->sid, skb, &ad);
+        err = selinux_xfrm_postroute_last(sksec->sid, skb, &ad);
 out:
         return err ? NF_DROP : NF_ACCEPT;
 }
@@ -4623,6 +4668,10 @@ static struct security_operations selinux_ops = {
         .sk_free_security =             selinux_sk_free_security,
         .sk_clone_security =            selinux_sk_clone_security,
         .sk_getsecid =                  selinux_sk_getsecid,
+        .sock_graft =                   selinux_sock_graft,
+        .inet_conn_request =            selinux_inet_conn_request,
+        .inet_csk_clone =               selinux_inet_csk_clone,
+        .req_classify_flow =            selinux_req_classify_flow,
 
 #ifdef CONFIG_SECURITY_NETWORK_XFRM
         .xfrm_policy_alloc_security =   selinux_xfrm_policy_alloc,