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Commit 88219a0f authored by Al Viro's avatar Al Viro Committed by David S. Miller
Browse files

[BLUETOOTH]: pass (host-endian) cmd length as explicit argument to l2cap_conf_req() 



Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 8e036fc3

net/bluetooth/l2cap.c

+11 −9
Original line number Diff line number Diff line
@@ -1530,7 +1530,7 @@ static inline int l2cap_connect_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hd 
	return 0;

}



static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u8 *data)

static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr *cmd, u16 cmd_len, u8 *data)

{

	struct l2cap_conf_req *req = (struct l2cap_conf_req *) data;

	u16 dcid, flags;
@@ -1550,7 +1550,7 @@ static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr 
		goto unlock;



	/* Reject if config buffer is too small. */

	len = cmd->len - sizeof(*req);

	len = cmd_len - sizeof(*req);

	if (l2cap_pi(sk)->conf_len + len > sizeof(l2cap_pi(sk)->conf_req)) {

		l2cap_send_cmd(conn, cmd->ident, L2CAP_CONF_RSP,

				l2cap_build_conf_rsp(sk, rsp,
@@ -1748,15 +1748,17 @@ static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *sk 
	l2cap_raw_recv(conn, skb);



	while (len >= L2CAP_CMD_HDR_SIZE) {

		u16 cmd_len;

		memcpy(&cmd, data, L2CAP_CMD_HDR_SIZE);

		data += L2CAP_CMD_HDR_SIZE;

		len  -= L2CAP_CMD_HDR_SIZE;



		cmd.len = __le16_to_cpu(cmd.len);

		cmd_len = le16_to_cpu(cmd.len);

		cmd.len = cmd_len;



		BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd.len, cmd.ident);

		BT_DBG("code 0x%2.2x len %d id 0x%2.2x", cmd.code, cmd_len, cmd.ident);



		if (cmd.len > len || !cmd.ident) {

		if (cmd_len > len || !cmd.ident) {

			BT_DBG("corrupted command");

			break;

		}
@@ -1775,7 +1777,7 @@ static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *sk 
			break;



		case L2CAP_CONF_REQ:

			err = l2cap_config_req(conn, &cmd, data);

			err = l2cap_config_req(conn, &cmd, cmd_len, data);

			break;



		case L2CAP_CONF_RSP:
@@ -1791,7 +1793,7 @@ static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *sk 
			break;



		case L2CAP_ECHO_REQ:

			l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd.len, data);

			l2cap_send_cmd(conn, cmd.ident, L2CAP_ECHO_RSP, cmd_len, data);

			break;



		case L2CAP_ECHO_RSP:
@@ -1820,8 +1822,8 @@ static inline void l2cap_sig_channel(struct l2cap_conn *conn, struct sk_buff *sk 
			l2cap_send_cmd(conn, cmd.ident, L2CAP_COMMAND_REJ, sizeof(rej), &rej);

		}



		data += cmd.len;

		len  -= cmd.len;

		data += cmd_len;

		len  -= cmd_len;

	}



	kfree_skb(skb);