1 files changed, 92 insertions, 51 deletions

diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index 688546dccd82..f90091a1b9ce 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -337,14 +337,14 @@ static int sctp_v4_cmp_addr(const union sctp_addr *addr1,
 static void sctp_v4_inaddr_any(union sctp_addr *addr, __be16 port)
 {
         addr->v4.sin_family = AF_INET;
-        addr->v4.sin_addr.s_addr = INADDR_ANY;
+        addr->v4.sin_addr.s_addr = htonl(INADDR_ANY);
         addr->v4.sin_port = port;
 }
 
 /* Is this a wildcard address? */
 static int sctp_v4_is_any(const union sctp_addr *addr)
 {
-        return INADDR_ANY == addr->v4.sin_addr.s_addr;
+        return htonl(INADDR_ANY) == addr->v4.sin_addr.s_addr;
 }
 
 /* This function checks if the address is a valid address to be used for
@@ -375,7 +375,7 @@ static int sctp_v4_available(union sctp_addr *addr, struct sctp_sock *sp)
         int ret = inet_addr_type(&init_net, addr->v4.sin_addr.s_addr);
 
 
-        if (addr->v4.sin_addr.s_addr != INADDR_ANY &&
+        if (addr->v4.sin_addr.s_addr != htonl(INADDR_ANY) &&
            ret != RTN_LOCAL &&
            !sp->inet.freebind &&
            !sysctl_ip_nonlocal_bind)
@@ -628,6 +628,7 @@ static int sctp_inetaddr_event(struct notifier_block *this, unsigned long ev,
         struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
         struct sctp_sockaddr_entry *addr = NULL;
         struct sctp_sockaddr_entry *temp;
+        int found = 0;
 
         switch (ev) {
         case NETDEV_UP:
@@ -647,13 +648,14 @@ static int sctp_inetaddr_event(struct notifier_block *this, unsigned long ev,
                 list_for_each_entry_safe(addr, temp,
                                         &sctp_local_addr_list, list) {
                         if (addr->a.v4.sin_addr.s_addr == ifa->ifa_local) {
+                                found = 1;
                                 addr->valid = 0;
                                 list_del_rcu(&addr->list);
                                 break;
                         }
                 }
                 spin_unlock_bh(&sctp_local_addr_lock);
-                if (addr && !addr->valid)
+                if (found)
                         call_rcu(&addr->rcu, sctp_local_addr_free);
                 break;
         }
@@ -783,8 +785,8 @@ static int sctp_inet_cmp_addr(const union sctp_addr *addr1,
         /* PF_INET only supports AF_INET addresses. */
         if (addr1->sa.sa_family != addr2->sa.sa_family)
                 return 0;
-        if (INADDR_ANY == addr1->v4.sin_addr.s_addr ||
-            INADDR_ANY == addr2->v4.sin_addr.s_addr)
+        if (htonl(INADDR_ANY) == addr1->v4.sin_addr.s_addr ||
+            htonl(INADDR_ANY) == addr2->v4.sin_addr.s_addr)
                 return 1;
         if (addr1->v4.sin_addr.s_addr == addr2->v4.sin_addr.s_addr)
                 return 1;
@@ -990,6 +992,58 @@ static void cleanup_sctp_mibs(void)
         free_percpu(sctp_statistics[1]);
 }
 
+static void sctp_v4_pf_init(void)
+{
+        /* Initialize the SCTP specific PF functions. */
+        sctp_register_pf(&sctp_pf_inet, PF_INET);
+        sctp_register_af(&sctp_af_inet);
+}
+
+static void sctp_v4_pf_exit(void)
+{
+        list_del(&sctp_af_inet.list);
+}
+
+static int sctp_v4_protosw_init(void)
+{
+        int rc;
+
+        rc = proto_register(&sctp_prot, 1);
+        if (rc)
+                return rc;
+
+        /* Register SCTP(UDP and TCP style) with socket layer.  */
+        inet_register_protosw(&sctp_seqpacket_protosw);
+        inet_register_protosw(&sctp_stream_protosw);
+
+        return 0;
+}
+
+static void sctp_v4_protosw_exit(void)
+{
+        inet_unregister_protosw(&sctp_stream_protosw);
+        inet_unregister_protosw(&sctp_seqpacket_protosw);
+        proto_unregister(&sctp_prot);
+}
+
+static int sctp_v4_add_protocol(void)
+{
+        /* Register notifier for inet address additions/deletions. */
+        register_inetaddr_notifier(&sctp_inetaddr_notifier);
+
+        /* Register SCTP with inet layer.  */
+        if (inet_add_protocol(&sctp_protocol, IPPROTO_SCTP) < 0)
+                return -EAGAIN;
+
+        return 0;
+}
+
+static void sctp_v4_del_protocol(void)
+{
+        inet_del_protocol(&sctp_protocol, IPPROTO_SCTP);
+        unregister_inetaddr_notifier(&sctp_inetaddr_notifier);
+}
+
 /* Initialize the universe into something sensible.  */
 SCTP_STATIC __init int sctp_init(void)
 {
@@ -1033,8 +1087,6 @@ SCTP_STATIC __init int sctp_init(void)
         /* Initialize object count debugging.  */
         sctp_dbg_objcnt_init();
 
-        /* Initialize the SCTP specific PF functions. */
-        sctp_register_pf(&sctp_pf_inet, PF_INET);
         /*
          * 14. Suggested SCTP Protocol Parameter Values
          */
@@ -1192,19 +1244,22 @@ SCTP_STATIC __init int sctp_init(void)
         sctp_sysctl_register();
 
         INIT_LIST_HEAD(&sctp_address_families);
-        sctp_register_af(&sctp_af_inet);
+        sctp_v4_pf_init();
+        sctp_v6_pf_init();
 
-        status = proto_register(&sctp_prot, 1);
-        if (status)
-                goto err_proto_register;
+        /* Initialize the local address list. */
+        INIT_LIST_HEAD(&sctp_local_addr_list);
+        spin_lock_init(&sctp_local_addr_lock);
+        sctp_get_local_addr_list();
 
-        /* Register SCTP(UDP and TCP style) with socket layer.  */
-        inet_register_protosw(&sctp_seqpacket_protosw);
-        inet_register_protosw(&sctp_stream_protosw);
+        status = sctp_v4_protosw_init();
 
-        status = sctp_v6_init();
         if (status)
-                goto err_v6_init;
+                goto err_protosw_init;
+
+        status = sctp_v6_protosw_init();
+        if (status)
+                goto err_v6_protosw_init;
 
         /* Initialize the control inode/socket for handling OOTB packets.  */
         if ((status = sctp_ctl_sock_init())) {
@@ -1213,19 +1268,9 @@ SCTP_STATIC __init int sctp_init(void)
                 goto err_ctl_sock_init;
         }
 
-        /* Initialize the local address list. */
-        INIT_LIST_HEAD(&sctp_local_addr_list);
-        spin_lock_init(&sctp_local_addr_lock);
-        sctp_get_local_addr_list();
-
-        /* Register notifier for inet address additions/deletions. */
-        register_inetaddr_notifier(&sctp_inetaddr_notifier);
-
-        /* Register SCTP with inet layer.  */
-        if (inet_add_protocol(&sctp_protocol, IPPROTO_SCTP) < 0) {
-                status = -EAGAIN;
+        status = sctp_v4_add_protocol();
+        if (status)
                 goto err_add_protocol;
-        }
 
         /* Register SCTP with inet6 layer.  */
         status = sctp_v6_add_protocol();
@@ -1236,18 +1281,18 @@ SCTP_STATIC __init int sctp_init(void)
 out:
         return status;
 err_v6_add_protocol:
-        inet_del_protocol(&sctp_protocol, IPPROTO_SCTP);
-        unregister_inetaddr_notifier(&sctp_inetaddr_notifier);
+        sctp_v6_del_protocol();
 err_add_protocol:
-        sctp_free_local_addr_list();
+        sctp_v4_del_protocol();
         sock_release(sctp_ctl_socket);
 err_ctl_sock_init:
-        sctp_v6_exit();
-err_v6_init:
-        inet_unregister_protosw(&sctp_stream_protosw);
-        inet_unregister_protosw(&sctp_seqpacket_protosw);
-        proto_unregister(&sctp_prot);
-err_proto_register:
+        sctp_v6_protosw_exit();
+err_v6_protosw_init:
+        sctp_v4_protosw_exit();
+err_protosw_init:
+        sctp_free_local_addr_list();
+        sctp_v4_pf_exit();
+        sctp_v6_pf_exit();
         sctp_sysctl_unregister();
         list_del(&sctp_af_inet.list);
         free_pages((unsigned long)sctp_port_hashtable,
@@ -1280,23 +1325,21 @@ SCTP_STATIC __exit void sctp_exit(void)
 
         /* Unregister with inet6/inet layers. */
         sctp_v6_del_protocol();
-        inet_del_protocol(&sctp_protocol, IPPROTO_SCTP);
-
-        /* Unregister notifier for inet address additions/deletions. */
-        unregister_inetaddr_notifier(&sctp_inetaddr_notifier);
-
-        /* Free the local address list.  */
-        sctp_free_local_addr_list();
+        sctp_v4_del_protocol();
 
         /* Free the control endpoint.  */
         sock_release(sctp_ctl_socket);
 
-        /* Cleanup v6 initializations. */
-        sctp_v6_exit();
+        /* Free protosw registrations */
+        sctp_v6_protosw_exit();
+        sctp_v4_protosw_exit();
+
+        /* Free the local address list.  */
+        sctp_free_local_addr_list();
 
         /* Unregister with socket layer. */
-        inet_unregister_protosw(&sctp_stream_protosw);
-        inet_unregister_protosw(&sctp_seqpacket_protosw);
+        sctp_v6_pf_exit();
+        sctp_v4_pf_exit();
 
         sctp_sysctl_unregister();
         list_del(&sctp_af_inet.list);
@@ -1315,8 +1358,6 @@ SCTP_STATIC __exit void sctp_exit(void)
 
         kmem_cache_destroy(sctp_chunk_cachep);
         kmem_cache_destroy(sctp_bucket_cachep);
-
-        proto_unregister(&sctp_prot);
 }
 
 module_init(sctp_init);