1 files changed, 45 insertions, 6 deletions

diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index befab857a39b..1d08f7b78fa0 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -430,7 +430,8 @@ static struct sk_buff *create_monitor_event(struct hci_dev *hdev, int event)
 		ni->type = hdev->dev_type;
 		ni->bus = hdev->bus;
 		bacpy(&ni->bdaddr, &hdev->bdaddr);
-		memcpy(ni->name, hdev->name, 8);
+		memcpy_and_pad(ni->name, sizeof(ni->name), hdev->name,
+			       strnlen(hdev->name, sizeof(ni->name)), '\0');
 
 		opcode = cpu_to_le16(HCI_MON_NEW_INDEX);
 		break;
@@ -881,10 +882,6 @@ static int hci_sock_release(struct socket *sock)
 	}
 
 	sock_orphan(sk);
-
-	skb_queue_purge(&sk->sk_receive_queue);
-	skb_queue_purge(&sk->sk_write_queue);
-
 	release_sock(sk);
 	sock_put(sk);
 	return 0;
@@ -977,6 +974,34 @@ static int hci_sock_ioctl(struct socket *sock, unsigned int cmd,
 
 	BT_DBG("cmd %x arg %lx", cmd, arg);
 
+	/* Make sure the cmd is valid before doing anything */
+	switch (cmd) {
+	case HCIGETDEVLIST:
+	case HCIGETDEVINFO:
+	case HCIGETCONNLIST:
+	case HCIDEVUP:
+	case HCIDEVDOWN:
+	case HCIDEVRESET:
+	case HCIDEVRESTAT:
+	case HCISETSCAN:
+	case HCISETAUTH:
+	case HCISETENCRYPT:
+	case HCISETPTYPE:
+	case HCISETLINKPOL:
+	case HCISETLINKMODE:
+	case HCISETACLMTU:
+	case HCISETSCOMTU:
+	case HCIINQUIRY:
+	case HCISETRAW:
+	case HCIGETCONNINFO:
+	case HCIGETAUTHINFO:
+	case HCIBLOCKADDR:
+	case HCIUNBLOCKADDR:
+		break;
+	default:
+		return -ENOIOCTLCMD;
+	}
+
 	lock_sock(sk);
 
 	if (hci_pi(sk)->channel != HCI_CHANNEL_RAW) {
@@ -993,7 +1018,14 @@ static int hci_sock_ioctl(struct socket *sock, unsigned int cmd,
 	if (hci_sock_gen_cookie(sk)) {
 		struct sk_buff *skb;
 
-		if (capable(CAP_NET_ADMIN))
+		/* Perform careful checks before setting the HCI_SOCK_TRUSTED
+		 * flag. Make sure that not only the current task but also
+		 * the socket opener has the required capability, since
+		 * privileged programs can be tricked into making ioctl calls
+		 * on HCI sockets, and the socket should not be marked as
+		 * trusted simply because the ioctl caller is privileged.
+		 */
+		if (sk_capable(sk, CAP_NET_ADMIN))
 			hci_sock_set_flag(sk, HCI_SOCK_TRUSTED);
 
 		/* Send event to monitor */
@@ -1985,6 +2017,12 @@ done:
 	return err;
 }
 
+static void hci_sock_destruct(struct sock *sk)
+{
+	skb_queue_purge(&sk->sk_receive_queue);
+	skb_queue_purge(&sk->sk_write_queue);
+}
+
 static const struct proto_ops hci_sock_ops = {
 	.family		= PF_BLUETOOTH,
 	.owner		= THIS_MODULE,
@@ -2035,6 +2073,7 @@ static int hci_sock_create(struct net *net, struct socket *sock, int protocol,
 
 	sock->state = SS_UNCONNECTED;
 	sk->sk_state = BT_OPEN;
+	sk->sk_destruct = hci_sock_destruct;
 
 	bt_sock_link(&hci_sk_list, sk);
 	return 0;