[Bluetooth] Restrict well known PSM to privileged users

[pandora-kernel.git] / net / bluetooth / l2cap.c

diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 2b3dcb8..f8c25d5 100644 (file)
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -585,6 +585,12 @@ static int l2cap_sock_bind(struct socket *sock, struct sockaddr *addr, int addr_
                goto done;
        }
 
+       if (la->l2_psm > 0 && btohs(la->l2_psm) < 0x1001 &&
+                               !capable(CAP_NET_BIND_SERVICE)) {
+               err = -EACCES;
+               goto done;
+       }
+               
        write_lock_bh(&l2cap_sk_list.lock);
 
        if (la->l2_psm && __l2cap_get_sock_by_addr(la->l2_psm, &la->l2_bdaddr)) {
@@ -770,7 +776,7 @@ static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int fl
        long timeo;
        int err = 0;
 
-       lock_sock(sk);
+       lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
 
        if (sk->sk_state != BT_LISTEN) {
                err = -EBADFD;
@@ -792,7 +798,7 @@ static int l2cap_sock_accept(struct socket *sock, struct socket *newsock, int fl
 
                release_sock(sk);
                timeo = schedule_timeout(timeo);
-               lock_sock(sk);
+               lock_sock_nested(sk, SINGLE_DEPTH_NESTING);
 
                if (sk->sk_state != BT_LISTEN) {
                        err = -EBADFD;
@@ -1353,12 +1359,12 @@ static inline int l2cap_conf_output(struct sock *sk, void **ptr)
 
        /* Configure output options and let the other side know
         * which ones we don't like. */
-       if (pi->conf_mtu < pi->omtu) {
-               l2cap_add_conf_opt(ptr, L2CAP_CONF_MTU, 2, pi->omtu);
+       if (pi->conf_mtu < pi->omtu)
                result = L2CAP_CONF_UNACCEPT;
-       } else {
+       else
                pi->omtu = pi->conf_mtu;
-       }
+
+       l2cap_add_conf_opt(ptr, L2CAP_CONF_MTU, 2, pi->omtu);
 
        BT_DBG("sk %p result %d", sk, result);
        return result;
@@ -1533,6 +1539,9 @@ static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr
        if (!(sk = l2cap_get_chan_by_scid(&conn->chan_list, dcid)))
                return -ENOENT;
 
+       if (sk->sk_state == BT_DISCONN)
+               goto unlock;
+
        l2cap_parse_conf_req(sk, req->data, cmd->len - sizeof(*req));
 
        if (flags & 0x0001) {
@@ -2147,8 +2156,8 @@ static ssize_t l2cap_sysfs_show(struct class *dev, char *buf)
 
                str += sprintf(str, "%s %s %d %d 0x%4.4x 0x%4.4x %d %d 0x%x\n",
                                batostr(&bt_sk(sk)->src), batostr(&bt_sk(sk)->dst),
-                               sk->sk_state, pi->psm, pi->scid, pi->dcid, pi->imtu,
-                               pi->omtu, pi->link_mode);
+                               sk->sk_state, btohs(pi->psm), pi->scid, pi->dcid,
+                               pi->imtu, pi->omtu, pi->link_mode);
        }
 
        read_unlock_bh(&l2cap_sk_list.lock);