Merge bk://kernel.bkbits.net/davem/net-2.5

into home.transmeta.com:/home/torvalds/v2.5/linux

MAINTAINERS

@@ -614,11 +614,9 @@ L:	linux-net@vger.kernel.org
 S:	Maintained
 
 ETHERNET BRIDGE
-P:	Lennert Buytenhek
-M:	buytenh@gnu.org
 L:	bridge@math.leidenuniv.nl
 W:	http://bridge.sourceforge.net/
-S:	Maintained
+S:	Unmaintained
 
 ETHERTEAM 16I DRIVER
 P:	Mika Kuoppala

include/net/sock.h

@@ -44,6 +44,7 @@
 
 #include <linux/netdevice.h>
 #include <linux/skbuff.h>	/* struct sk_buff */
+#include <linux/security.h>
 
 #ifdef CONFIG_FILTER
 #include <linux/filter.h>
@@ -458,28 +459,45 @@ extern void sock_init_data(struct socket *sock, struct sock *sk);
 #ifdef CONFIG_FILTER
 
 /**
- *	sk_filter - run a packet through a socket filter
+ *	__sk_filter - run a packet through a socket filter
+ *	@sk: sock associated with &sk_buff
  *	@skb: buffer to filter
- *	@filter: filter to apply
+ *	@needlock: set to 1 if the sock is not locked by caller.
  *
  * Run the filter code and then cut skb->data to correct size returned by
  * sk_run_filter. If pkt_len is 0 we toss packet. If skb->len is smaller
  * than pkt_len we keep whole skb->data. This is the socket level
  * wrapper to sk_run_filter. It returns 0 if the packet should
- * be accepted or 1 if the packet should be tossed.
+ * be accepted or -EPERM if the packet should be tossed.
+ *
+ * This function should not be called directly, use sk_filter instead
+ * to ensure that the LSM security check is also performed.
  */
- 
-static inline int sk_filter(struct sk_buff *skb, struct sk_filter *filter)
-{
-	int pkt_len;
 
-        pkt_len = sk_run_filter(skb, filter->insns, filter->len);
-        if(!pkt_len)
-                return 1;	/* Toss Packet */
-        else
-                skb_trim(skb, pkt_len);
+static inline int __sk_filter(struct sock *sk, struct sk_buff *skb, int needlock)
+{
+	int err = 0;
 
-	return 0;
+	if (sk->filter) {
+		struct sk_filter *filter;
+		
+		if (needlock)
+			bh_lock_sock(sk);
+		
+		filter = sk->filter;
+		if (filter) {
+			int pkt_len = sk_run_filter(skb, filter->insns,
+						    filter->len);
+			if (!pkt_len)
+				err = -EPERM;
+			else
+				skb_trim(skb, pkt_len);
+		}
+
+		if (needlock)
+			bh_unlock_sock(sk);
+	}
+	return err;
 }
 
 /**
@@ -506,8 +524,26 @@ static inline void sk_filter_charge(struct sock *sk, struct sk_filter *fp)
 	atomic_add(sk_filter_len(fp), &sk->omem_alloc);
 }
 
+#else
+
+static inline int __sk_filter(struct sock *sk, struct sk_buff *skb, int needlock)
+{
+	return 0;
+}
+
 #endif /* CONFIG_FILTER */
 
+static inline int sk_filter(struct sock *sk, struct sk_buff *skb, int needlock)
+{
+	int err;
+	
+	err = security_sock_rcv_skb(sk, skb);
+	if (err)
+		return err;
+	
+	return __sk_filter(sk, skb, needlock);
+}
+
 /*
  * Socket reference counting postulates.
  *
@@ -712,36 +748,31 @@ static inline void skb_set_owner_r(struct sk_buff *skb, struct sock *sk)
 
 static inline int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
 {
+	int err = 0;
+
 	/* Cast skb->rcvbuf to unsigned... It's pointless, but reduces
 	   number of warnings when compiling with -W --ANK
 	 */
-	if (atomic_read(&sk->rmem_alloc) + skb->truesize >= (unsigned)sk->rcvbuf)
-                return -ENOMEM;
-
-#ifdef CONFIG_FILTER
-	if (sk->filter) {
-		int err = 0;
-		struct sk_filter *filter;
-
-		/* It would be deadlock, if sock_queue_rcv_skb is used
-		   with socket lock! We assume that users of this
-		   function are lock free.
-		 */
-		bh_lock_sock(sk);
-		if ((filter = sk->filter) != NULL && sk_filter(skb, filter))
-			err = -EPERM;
-		bh_unlock_sock(sk);
-		if (err)
-			return err;	/* Toss packet */
+	if (atomic_read(&sk->rmem_alloc) + skb->truesize >= (unsigned)sk->rcvbuf) {
+		err = -ENOMEM;
+		goto out;
 	}
-#endif /* CONFIG_FILTER */
+
+	/* It would be deadlock, if sock_queue_rcv_skb is used
+	   with socket lock! We assume that users of this
+	   function are lock free.
+	*/
+	err = sk_filter(sk, skb, 1);
+	if (err)
+		goto out;
 
 	skb->dev = NULL;
 	skb_set_owner_r(skb, sk);
 	skb_queue_tail(&sk->receive_queue, skb);
 	if (!sk->dead)
 		sk->data_ready(sk,skb->len);
-	return 0;
+out:
+	return err;
 }
 
 static inline int sock_queue_err_skb(struct sock *sk, struct sk_buff *skb)

net/bridge/br.c

@@ -33,12 +33,12 @@ int (*br_should_route_hook) (struct sk_buff **pskb) = NULL;
 
 void br_dec_use_count()
 {
-	MOD_DEC_USE_COUNT;
+	module_put(THIS_MODULE);
 }
 
 void br_inc_use_count()
 {
-	MOD_INC_USE_COUNT;
+	try_module_get(THIS_MODULE);
 }
 
 static int __init br_init(void)

net/bridge/br_if.c

@@ -155,8 +155,6 @@ static struct net_bridge_port *new_nbp(struct net_bridge *br, struct net_device
 	p->path_cost = br_initial_port_cost(dev);
 	p->priority = 0x80;
 
-	dev->br_port = p;
-
 	for (i=1;i<255;i++)
 		if (br_get_port(br, i) == NULL)
 			break;
@@ -166,6 +164,8 @@ static struct net_bridge_port *new_nbp(struct net_bridge *br, struct net_device
 		return NULL;
 	}
 
+	dev->br_port = p;
+
 	p->port_no = i;
 	br_init_port(p);
 	p->state = BR_STATE_DISABLED;

net/core/rtnetlink.c

@@ -34,6 +34,7 @@
 #include <linux/capability.h>
 #include <linux/skbuff.h>
 #include <linux/init.h>
+#include <linux/security.h>
 
 #include <asm/uaccess.h>
 #include <asm/system.h>
@@ -363,7 +364,7 @@ rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *errp)
 	sz_idx = type>>2;
 	kind = type&3;
 
-	if (kind != 2 && !cap_raised(NETLINK_CB(skb).eff_cap, CAP_NET_ADMIN)) {
+	if (kind != 2 && security_netlink_recv(skb)) {
 		*errp = -EPERM;
 		return -1;
 	}

net/decnet/dn_nsp_in.c

@@ -566,26 +566,19 @@ static void dn_nsp_linkservice(struct sock *sk, struct sk_buff *skb)
  */
 static __inline__ int dn_queue_skb(struct sock *sk, struct sk_buff *skb, int sig, struct sk_buff_head *queue)
 {
-#ifdef CONFIG_FILTER
-	struct sk_filter *filter;
-#endif
-
+	int err;
+	
         /* Cast skb->rcvbuf to unsigned... It's pointless, but reduces
            number of warnings when compiling with -W --ANK
          */
-        if (atomic_read(&sk->rmem_alloc) + skb->truesize >= (unsigned)sk->rcvbuf
-)
-                return -ENOMEM;
-
-#ifdef CONFIG_FILTER
-        if (sk->filter) {
-		int err = 0;
-                if ((filter = sk->filter) != NULL && sk_filter(skb, sk->filter))
-                        err = -EPERM;  /* Toss packet */
-		if (err)
-			return err;
+        if (atomic_read(&sk->rmem_alloc) + skb->truesize >= (unsigned)sk->rcvbuf) {
+        	err = -ENOMEM;
+        	goto out;
         }
-#endif /* CONFIG_FILTER */
+
+	err = sk_filter(sk, skb, 0);
+	if (err)
+		goto out;
 
         skb_set_owner_r(skb, sk);
         skb_queue_tail(queue, skb);
@@ -603,8 +596,8 @@ static __inline__ int dn_queue_skb(struct sock *sk, struct sk_buff *skb, int sig
 				    (sig == SIGURG) ? POLL_PRI : POLL_IN);
 	}
 	read_unlock(&sk->callback_lock);
-
-        return 0;
+out:
+        return err;
 }
 
 static void dn_nsp_otherdata(struct sock *sk, struct sk_buff *skb)

net/ipv4/netfilter/Kconfig

@@ -148,6 +148,14 @@ config IP_NF_MATCH_ECN
 config IP_NF_MATCH_DSCP
 	tristate "DSCP match support"
 	depends on IP_NF_IPTABLES
+	help
+	  This option adds a `DSCP' match, which allows you to match against
+	  the IPv4 header DSCP field (DSCP codepoint).
+
+	  The DSCP codepoint can have any value between 0x0 and 0x4f.
+
+	  If you want to compile it as a module, say M here and read
+	  Documentation/modules.txt.  If unsure, say `N'.
 
 config IP_NF_MATCH_AH_ESP
 	tristate "AH/ESP match support"

net/ipv4/netfilter/ip_nat_helper.c

@@ -84,7 +84,6 @@ ip_nat_resize_packet(struct sk_buff **skb,
 	iph = (*skb)->nh.iph;
 	if (iph->protocol == IPPROTO_TCP) {
 		struct tcphdr *tcph = (void *)iph + iph->ihl*4;
-		void *data = (void *)tcph + tcph->doff*4;
 
 		DEBUGP("ip_nat_resize_packet: Seq_offset before: ");
 		DUMP_OFFSET(this_way);

net/ipv4/netfilter/ip_queue.c

@@ -26,6 +26,7 @@
 #include <linux/brlock.h>
 #include <linux/sysctl.h>
 #include <linux/proc_fs.h>
+#include <linux/security.h>
 #include <net/sock.h>
 #include <net/route.h>
 
@@ -496,7 +497,7 @@ ipq_rcv_skb(struct sk_buff *skb)
 	if (type <= IPQM_BASE)
 		return;
 		
-	if(!cap_raised(NETLINK_CB(skb).eff_cap, CAP_NET_ADMIN))
+	if (security_netlink_recv(skb))
 		RCV_SKB_FAIL(-EPERM);
 	
 	write_lock_bh(&queue_lock);

net/ipv4/route.c

@@ -2288,7 +2288,7 @@ int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg)
 		struct net_device *dev = __dev_get_by_index(iif);
 		err = -ENODEV;
 		if (!dev)
-			goto out;
+			goto out_free;
 		skb->protocol	= htons(ETH_P_IP);
 		skb->dev	= dev;
 		local_bh_disable();
@@ -2307,10 +2307,8 @@ int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg)
 		fl.oif = oif;
 		err = ip_route_output_key(&rt, &fl);
 	}
-	if (err) {
-		kfree_skb(skb);
-		goto out;
-	}
+	if (err)
+		goto out_free;
 
 	skb->dst = &rt->u.dst;
 	if (rtm->rtm_flags & RTM_F_NOTIFY)
@@ -2321,16 +2319,20 @@ int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg)
 	err = rt_fill_info(skb, NETLINK_CB(in_skb).pid, nlh->nlmsg_seq,
 				RTM_NEWROUTE, 0);
 	if (!err)
-		goto out;
+		goto out_free;
 	if (err < 0) {
 		err = -EMSGSIZE;
-		goto out;
+		goto out_free;
 	}
 
 	err = netlink_unicast(rtnl, skb, NETLINK_CB(in_skb).pid, MSG_DONTWAIT);
 	if (err > 0)
 		err = 0;
 out:	return err;
+
+out_free:
+	kfree_skb(skb);
+	goto out;
 }
 
 int ip_rt_dump(struct sk_buff *skb,  struct netlink_callback *cb)

net/ipv4/tcp_ipv4.c

@@ -1697,12 +1697,6 @@ static int tcp_v4_checksum_init(struct sk_buff *skb)
  */
 int tcp_v4_do_rcv(struct sock *sk, struct sk_buff *skb)
 {
-#ifdef CONFIG_FILTER
-	struct sk_filter *filter = sk->filter;
-	if (filter && sk_filter(skb, filter))
-		goto discard;
-#endif /* CONFIG_FILTER */
-
 	if (sk->state == TCP_ESTABLISHED) { /* Fast path */
 		TCP_CHECK_TIMER(sk);
 		if (tcp_rcv_established(sk, skb, skb->h.th, skb->len))
@@ -1805,6 +1799,9 @@ int tcp_v4_rcv(struct sk_buff *skb)
 	if (!xfrm_policy_check(sk, XFRM_POLICY_IN, skb))
 		goto discard_and_relse;
 
+	if (sk_filter(sk, skb, 0))
+		goto discard_and_relse;
+
 	skb->dev = NULL;
 
 	bh_lock_sock(sk);

net/ipv4/xfrm_user.c

@@ -16,6 +16,7 @@
 #include <linux/pfkeyv2.h>
 #include <linux/ipsec.h>
 #include <linux/init.h>
+#include <linux/security.h>
 #include <net/sock.h>
 #include <net/xfrm.h>
 
@@ -774,7 +775,7 @@ static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, int *err
 	link = &xfrm_dispatch[type];
 
 	/* All operations require privileges, even GET */
-	if (!cap_raised(NETLINK_CB(skb).eff_cap, CAP_NET_ADMIN)) {
+	if (security_netlink_recv(skb)) {
 		*errp = -EPERM;
 		return -1;
 	}

net/ipv6/netfilter/ip6_queue.c

@@ -538,10 +538,10 @@ ipq_rcv_skb(struct sk_buff *skb)
 		
 	if (type <= IPQM_BASE)
 		return;
-		
-	if(!cap_raised(NETLINK_CB(skb).eff_cap, CAP_NET_ADMIN))
-		RCV_SKB_FAIL(-EPERM);
 	
+	if (security_netlink_recv(skb))
+		RCV_SKB_FAIL(-EPERM);	
+
 	write_lock_bh(&queue_lock);
 	
 	if (peer_pid) {

net/ipv6/route.c

@@ -1548,14 +1548,14 @@ int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg)
 {
 	struct rtattr **rta = arg;
 	int iif = 0;
-	int err;
+	int err = -ENOBUFS;
 	struct sk_buff *skb;
 	struct flowi fl;
 	struct rt6_info *rt;
 
 	skb = alloc_skb(NLMSG_GOODSIZE, GFP_KERNEL);
 	if (skb == NULL)
-		return -ENOBUFS;
+		goto out;
 
 	/* Reserve room for dummy headers, this skb can pass
 	   through good chunk of routing engine.
@@ -1579,8 +1579,10 @@ int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg)
 	if (iif) {
 		struct net_device *dev;
 		dev = __dev_get_by_index(iif);
-		if (!dev)
-			return -ENODEV;
+		if (!dev) {
+			err = -ENODEV;
+			goto out_free;
+		}
 	}
 
 	fl.oif = 0;
@@ -1597,13 +1599,19 @@ int inet6_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr* nlh, void *arg)
 			    fl.nl_u.ip6_u.saddr,
 			    iif,
 			    RTM_NEWROUTE, NETLINK_CB(in_skb).pid, nlh->nlmsg_seq);
-	if (err < 0)
-		return -EMSGSIZE;
+	if (err < 0) {
+		err = -EMSGSIZE;
+		goto out_free;
+	}
 
 	err = netlink_unicast(rtnl, skb, NETLINK_CB(in_skb).pid, MSG_DONTWAIT);
-	if (err < 0)
-		return err;
-	return 0;
+	if (err > 0)
+		err = 0;
+out:
+	return err;
+out_free:
+	kfree_skb(skb);
+	goto out;	
 }
 
 void inet6_rt_notify(int event, struct rt6_info *rt)

net/ipv6/tcp_ipv6.c

@@ -1470,9 +1470,6 @@ static int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
 {
 	struct ipv6_pinfo *np = inet6_sk(sk);
 	struct tcp_opt *tp;
-#ifdef CONFIG_FILTER
-	struct sk_filter *filter;
-#endif
 	struct sk_buff *opt_skb = NULL;
 
 	/* Imagine: socket is IPv6. IPv4 packet arrives,
@@ -1486,11 +1483,8 @@ static int tcp_v6_do_rcv(struct sock *sk, struct sk_buff *skb)
 	if (skb->protocol == htons(ETH_P_IP))
 		return tcp_v4_do_rcv(sk, skb);
 
-#ifdef CONFIG_FILTER
-	filter = sk->filter;
-	if (filter && sk_filter(skb, filter))
+	if (sk_filter(sk, skb, 0))
 		goto discard;
-#endif /* CONFIG_FILTER */
 
 	/*
 	 *	socket locking is here for SMP purposes as backlog rcv
@@ -1641,6 +1635,9 @@ static int tcp_v6_rcv(struct sk_buff *skb)
 	if(sk->state == TCP_TIME_WAIT)
 		goto do_time_wait;
 
+	if (sk_filter(sk, skb, 0))
+		goto discard_and_relse;
+
 	skb->dev = NULL;
 
 	bh_lock_sock(sk);
@@ -1672,6 +1669,10 @@ static int tcp_v6_rcv(struct sk_buff *skb)
 	kfree_skb(skb);
 	return 0;
 
+discard_and_relse:
+	sock_put(sk);
+	goto discard_it;
+                
 do_time_wait:
 	if (skb->len < (th->doff<<2) || tcp_checksum_complete(skb)) {
 		TCP_INC_STATS_BH(TcpInErrs);

net/netlink/af_netlink.c

@@ -42,6 +42,7 @@
 #include <linux/proc_fs.h>
 #include <linux/smp_lock.h>
 #include <linux/notifier.h>
+#include <linux/security.h>
 #include <net/sock.h>
 #include <net/scm.h>
 
@@ -636,7 +637,12 @@ static int netlink_sendmsg(struct kiocb *iocb, struct socket *sock,
 	   check them, when this message will be delivered
 	   to corresponding kernel module.   --ANK (980802)
 	 */
-	NETLINK_CB(skb).eff_cap = current->cap_effective;
+
+	err = security_netlink_send(skb);
+	if (err) {
+		kfree_skb(skb);
+		goto out;
+	}
 
 	err = -EFAULT;
 	if (memcpy_fromiovec(skb_put(skb,len), msg->msg_iov, len)) {

net/sctp/input.c

@@ -159,6 +159,10 @@ int sctp_rcv(struct sk_buff *skb)
 	if (!xfrm_policy_check(sk, XFRM_POLICY_IN, skb))
 		goto discard_release;
 
+	ret = sk_filter(sk, skb, 1);
+	if (ret)
+                goto discard_release;
+
 	/* Create an SCTP packet structure. */
 	chunk = sctp_chunkify(skb, asoc, sk);
 	if (!chunk) {

net/socket.c

@@ -77,6 +77,7 @@
 #include <linux/highmem.h>
 #include <linux/divert.h>
 #include <linux/mount.h>
+#include <linux/security.h>
 
 #if defined(CONFIG_KMOD) && defined(CONFIG_NET)
 #include <linux/kmod.h>
@@ -527,6 +528,10 @@ static int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr
 	si->msg = msg;
 	si->size = size;
 
+	err = security_socket_sendmsg(sock, msg, size);
+	if (err)
+		return err;
+
 	err = scm_send(sock, msg, si->scm);
 	if (err >= 0) {
 		err = sock->ops->sendmsg(iocb, sock, msg, size, si->scm);
@@ -551,6 +556,7 @@ int sock_sendmsg(struct socket *sock, struct msghdr *msg, int size)
 
 int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, int size, int flags)
 {
+	int err;
 	struct sock_iocb *si = kiocb_to_siocb(iocb);
 
 	si->sock = sock;
@@ -560,6 +566,10 @@ int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
 	si->size = size;
 	si->flags = flags;
 
+	err = security_socket_recvmsg(sock, msg, size, flags);
+	if (err)
+		return err;
+
 	memset(si->scm, 0, sizeof(*si->scm));
 
 	size = sock->ops->recvmsg(iocb, sock, msg, size, flags, si->scm);
@@ -963,6 +973,7 @@ int sock_wake_async(struct socket *sock, int how, int band)
 int sock_create(int family, int type, int protocol, struct socket **res)
 {
 	int i;
+	int err;
 	struct socket *sock;
 
 	/*
@@ -986,6 +997,10 @@ int sock_create(int family, int type, int protocol, struct socket **res)
 		}
 		family = PF_PACKET;
 	}
+
+	err = security_socket_create(family, type, protocol);
+	if (err)
+		return err;
 		
 #if defined(CONFIG_KMOD) && defined(CONFIG_NET)
 	/* Attempt to load a protocol module if the find failed. 
@@ -1031,6 +1046,7 @@ int sock_create(int family, int type, int protocol, struct socket **res)
 	}
 
 	*res = sock;
+	security_socket_post_create(sock, family, type, protocol);
 
 out:
 	net_family_read_unlock();
@@ -1141,8 +1157,14 @@ asmlinkage long sys_bind(int fd, struct sockaddr *umyaddr, int addrlen)
 
 	if((sock = sockfd_lookup(fd,&err))!=NULL)
 	{
-		if((err=move_addr_to_kernel(umyaddr,addrlen,address))>=0)
+		if((err=move_addr_to_kernel(umyaddr,addrlen,address))>=0) {
+			err = security_socket_bind(sock, (struct sockaddr *)address, addrlen);
+			if (err) {
+				sockfd_put(sock);
+				return err;
+			}
 			err = sock->ops->bind(sock, (struct sockaddr *)address, addrlen);
+		}
 		sockfd_put(sock);
 	}			
 	return err;
@@ -1163,6 +1185,13 @@ asmlinkage long sys_listen(int fd, int backlog)
 	if ((sock = sockfd_lookup(fd, &err)) != NULL) {
 		if ((unsigned) backlog > SOMAXCONN)
 			backlog = SOMAXCONN;
+
+		err = security_socket_listen(sock, backlog);
+		if (err) {
+			sockfd_put(sock);
+			return err;
+		}
+
 		err=sock->ops->listen(sock, backlog);
 		sockfd_put(sock);
 	}
@@ -1199,6 +1228,10 @@ asmlinkage long sys_accept(int fd, struct sockaddr *upeer_sockaddr, int *upeer_a
 	newsock->type = sock->type;
 	newsock->ops = sock->ops;
 
+	err = security_socket_accept(sock, newsock);
+	if (err)
+		goto out_release;
+
 	err = sock->ops->accept(sock, newsock, sock->file->f_flags);
 	if (err < 0)
 		goto out_release;
@@ -1218,6 +1251,8 @@ asmlinkage long sys_accept(int fd, struct sockaddr *upeer_sockaddr, int *upeer_a
 	if ((err = sock_map_fd(newsock)) < 0)
 		goto out_release;
 
+	security_socket_post_accept(sock, newsock);
+
 out_put:
 	sockfd_put(sock);
 out:
@@ -1253,6 +1288,11 @@ asmlinkage long sys_connect(int fd, struct sockaddr *uservaddr, int addrlen)
 	err = move_addr_to_kernel(uservaddr, addrlen, address);
 	if (err < 0)
 		goto out_put;
+
+	err = security_socket_connect(sock, (struct sockaddr *)address, addrlen);
+	if (err)
+		goto out_put;
+
 	err = sock->ops->connect(sock, (struct sockaddr *) address, addrlen,
 				 sock->file->f_flags);
 out_put:
@@ -1275,6 +1315,11 @@ asmlinkage long sys_getsockname(int fd, struct sockaddr *usockaddr, int *usockad
 	sock = sockfd_lookup(fd, &err);
 	if (!sock)
 		goto out;
+
+	err = security_socket_getsockname(sock);
+	if (err)
+		goto out_put;
+
 	err = sock->ops->getname(sock, (struct sockaddr *)address, &len, 0);
 	if (err)
 		goto out_put;
@@ -1299,6 +1344,12 @@ asmlinkage long sys_getpeername(int fd, struct sockaddr *usockaddr, int *usockad
 
 	if ((sock = sockfd_lookup(fd, &err))!=NULL)
 	{
+		err = security_socket_getpeername(sock);
+		if (err) {
+			sockfd_put(sock);
+			return err;
+		}
+
 		err = sock->ops->getname(sock, (struct sockaddr *)address, &len, 1);
 		if (!err)
 			err=move_addr_to_user(address,len, usockaddr, usockaddr_len);
@@ -1427,6 +1478,12 @@ asmlinkage long sys_setsockopt(int fd, int level, int optname, char *optval, int
 			
 	if ((sock = sockfd_lookup(fd, &err))!=NULL)
 	{
+		err = security_socket_setsockopt(sock,level,optname);
+		if (err) {
+			sockfd_put(sock);
+			return err;
+		}
+
 		if (level == SOL_SOCKET)
 			err=sock_setsockopt(sock,level,optname,optval,optlen);
 		else
@@ -1448,6 +1505,13 @@ asmlinkage long sys_getsockopt(int fd, int level, int optname, char *optval, int
 
 	if ((sock = sockfd_lookup(fd, &err))!=NULL)
 	{
+		err = security_socket_getsockopt(sock, level, 
+							   optname);
+		if (err) {
+			sockfd_put(sock);
+			return err;
+		}
+
 		if (level == SOL_SOCKET)
 			err=sock_getsockopt(sock,level,optname,optval,optlen);
 		else
@@ -1469,6 +1533,12 @@ asmlinkage long sys_shutdown(int fd, int how)
 
 	if ((sock = sockfd_lookup(fd, &err))!=NULL)
 	{
+		err = security_socket_shutdown(sock, how);
+		if (err) {
+			sockfd_put(sock);
+			return err;
+		}
+				
 		err=sock->ops->shutdown(sock, how);
 		sockfd_put(sock);
 	}

net/unix/af_unix.c

@@ -115,6 +115,7 @@
 #include <linux/rtnetlink.h>
 #include <linux/mount.h>
 #include <net/checksum.h>
+#include <linux/security.h>
 
 int sysctl_unix_max_dgram_qlen = 10;
 
@@ -816,6 +817,11 @@ static int unix_dgram_connect(struct socket *sock, struct sockaddr *addr,
 		err = -EPERM;
 		if (!unix_may_send(sk, other))
 			goto out_unlock;
+
+		err = security_unix_may_send(sk->socket, other->socket);
+		if (err)
+			goto out_unlock;
+
 	} else {
 		/*
 		 *	1003.1g breaking connected state with AF_UNSPEC
@@ -981,6 +987,12 @@ static int unix_stream_connect(struct socket *sock, struct sockaddr *uaddr,
 		goto restart;
 	}
 
+	err = security_unix_stream_connect(sock, other->socket, newsk);
+	if (err) {
+		unix_state_wunlock(sk);
+		goto out_unlock;
+	}
+
 	/* The way is open! Fastly set all the necessary fields... */
 
 	sock_hold(sk);
@@ -1280,6 +1292,10 @@ static int unix_dgram_sendmsg(struct kiocb *iocb, struct socket *sock,
 	if (other->shutdown&RCV_SHUTDOWN)
 		goto out_unlock;
 
+	err = security_unix_may_send(sk->socket, other->socket);
+	if (err)
+		goto out_unlock;
+
 	if (unix_peer(other) != sk &&
 	    skb_queue_len(&other->receive_queue) > other->max_ack_backlog) {
 		if (!timeo) {

security/Kconfig

@@ -15,6 +15,15 @@ config SECURITY
 
 	  If you are unsure how to answer this question, answer N.
 
+config SECURITY_NETWORK
+	bool "Socket and Networking Security Hooks"
+	depends on SECURITY
+	help
+	  This enables the socket and networking security hooks.
+	  If enabled, a security module can use these hooks to
+	  implement socket and networking access controls.
+	  If you are unsure how to answer this question, answer N.
+
 config SECURITY_CAPABILITIES
 	tristate "Default Linux Capabilities"
 	depends on SECURITY!=n

security/capability.c

@@ -282,6 +282,8 @@ static struct security_operations capability_ops = {
 	.capset_check =			cap_capset_check,
 	.capset_set =			cap_capset_set,
 	.capable =			cap_capable,
+	.netlink_send =			cap_netlink_send,
+	.netlink_recv =			cap_netlink_recv,
 
 	.bprm_compute_creds =		cap_bprm_compute_creds,
 	.bprm_set_security =		cap_bprm_set_security,

security/dummy.c

@@ -20,7 +20,7 @@
 #include <linux/security.h>
 #include <linux/skbuff.h>
 #include <linux/netlink.h>
-
+#include <net/sock.h>
 
 static int dummy_ptrace (struct task_struct *parent, struct task_struct *child)
 {
@@ -597,6 +597,118 @@ static int dummy_sem_semop (struct sem_array *sma,
 	return 0;
 }
 
+static int dummy_netlink_send (struct sk_buff *skb)
+{
+	if (current->euid == 0)
+		cap_raise (NETLINK_CB (skb).eff_cap, CAP_NET_ADMIN);
+	else
+		NETLINK_CB (skb).eff_cap = 0;
+	return 0;
+}
+
+static int dummy_netlink_recv (struct sk_buff *skb)
+{
+	if (!cap_raised (NETLINK_CB (skb).eff_cap, CAP_NET_ADMIN))
+		return -EPERM;
+	return 0;
+}
+
+#ifdef CONFIG_SECURITY_NETWORK
+static int dummy_unix_stream_connect (struct socket *sock,
+				      struct socket *other,
+				      struct sock *newsk)
+{
+	return 0;
+}
+
+static int dummy_unix_may_send (struct socket *sock,
+				struct socket *other)
+{
+	return 0;
+}
+
+static int dummy_socket_create (int family, int type, int protocol)
+{
+	return 0;
+}
+
+static void dummy_socket_post_create (struct socket *sock, int family, int type,
+				      int protocol)
+{
+	return;
+}
+
+static int dummy_socket_bind (struct socket *sock, struct sockaddr *address,
+			      int addrlen)
+{
+	return 0;
+}
+
+static int dummy_socket_connect (struct socket *sock, struct sockaddr *address,
+				 int addrlen)
+{
+	return 0;
+}
+
+static int dummy_socket_listen (struct socket *sock, int backlog)
+{
+	return 0;
+}
+
+static int dummy_socket_accept (struct socket *sock, struct socket *newsock)
+{
+	return 0;
+}
+
+static void dummy_socket_post_accept (struct socket *sock, 
+				      struct socket *newsock)
+{
+	return;
+}
+
+static int dummy_socket_sendmsg (struct socket *sock, struct msghdr *msg,
+				 int size)
+{
+	return 0;
+}
+
+static int dummy_socket_recvmsg (struct socket *sock, struct msghdr *msg,
+				 int size, int flags)
+{
+	return 0;
+}
+
+static int dummy_socket_getsockname (struct socket *sock)
+{
+	return 0;
+}
+
+static int dummy_socket_getpeername (struct socket *sock)
+{
+	return 0;
+}
+
+static int dummy_socket_setsockopt (struct socket *sock, int level, int optname)
+{
+	return 0;
+}
+
+static int dummy_socket_getsockopt (struct socket *sock, int level, int optname)
+{
+	return 0;
+}
+
+static int dummy_socket_shutdown (struct socket *sock, int how)
+{
+	return 0;
+}
+
+static int dummy_socket_sock_rcv_skb (struct sock *sk, struct sk_buff *skb)
+{
+	return 0;
+}
+#endif	/* CONFIG_SECURITY_NETWORK */
+
 static int dummy_register_security (const char *name, struct security_operations *ops)
 {
 	return -EINVAL;
@@ -723,7 +835,28 @@ void security_fixup_ops (struct security_operations *ops)
 	set_to_dummy_if_null(ops, sem_associate);
 	set_to_dummy_if_null(ops, sem_semctl);
 	set_to_dummy_if_null(ops, sem_semop);
+	set_to_dummy_if_null(ops, netlink_send);
+	set_to_dummy_if_null(ops, netlink_recv);
 	set_to_dummy_if_null(ops, register_security);
 	set_to_dummy_if_null(ops, unregister_security);
+#ifdef CONFIG_SECURITY_NETWORK
+	set_to_dummy_if_null(ops, unix_stream_connect);
+	set_to_dummy_if_null(ops, unix_may_send);
+	set_to_dummy_if_null(ops, socket_create);
+	set_to_dummy_if_null(ops, socket_post_create);
+	set_to_dummy_if_null(ops, socket_bind);
+	set_to_dummy_if_null(ops, socket_connect);
+	set_to_dummy_if_null(ops, socket_listen);
+	set_to_dummy_if_null(ops, socket_accept);
+	set_to_dummy_if_null(ops, socket_post_accept);
+	set_to_dummy_if_null(ops, socket_sendmsg);
+	set_to_dummy_if_null(ops, socket_recvmsg);
+	set_to_dummy_if_null(ops, socket_getsockname);
+	set_to_dummy_if_null(ops, socket_getpeername);
+	set_to_dummy_if_null(ops, socket_setsockopt);
+	set_to_dummy_if_null(ops, socket_getsockopt);
+	set_to_dummy_if_null(ops, socket_shutdown);
+	set_to_dummy_if_null(ops, socket_sock_rcv_skb);
+#endif	/* CONFIG_SECURITY_NETWORK */
 }