From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f182.google.com ([209.85.212.182]:44465 "EHLO mail-wi0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752386AbbAJWe4 (ORCPT ); Sat, 10 Jan 2015 17:34:56 -0500 From: Alexander Aring Subject: [RFC bluetooth-next 2/2] ieee802154: socket: add BUILD_BUG_ON for cast check Date: Sat, 10 Jan 2015 23:33:26 +0100 Message-Id: <1420929206-5771-3-git-send-email-alex.aring@gmail.com> In-Reply-To: <1420929206-5771-1-git-send-email-alex.aring@gmail.com> References: <1420929206-5771-1-git-send-email-alex.aring@gmail.com> Sender: linux-wpan-owner@vger.kernel.org List-ID: To: linux-bluetooth@vger.kernel.org Cc: linux-wpan@vger.kernel.org, kernel@pengutronix.de, marcel@holtmann.org, werner@almesberger.net, mkl@pengutronix.de, Alexander Aring This patch adds an overdue BUILD_BUG_ON size check that the "struct sockaddr_ieee802154" is never greater than the "struct sockaddr". The IEEE 802.15.4 will cast the "struct sockaddr" to struct sockaddr_ieee802154" at several places. Signed-off-by: Alexander Aring --- net/ieee802154/socket.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/ieee802154/socket.c b/net/ieee802154/socket.c index 2878d8c..9c09291 100644 --- a/net/ieee802154/socket.c +++ b/net/ieee802154/socket.c @@ -1085,6 +1085,9 @@ static int __init af_ieee802154_init(void) { int rc = -EINVAL; + BUILD_BUG_ON(sizeof(struct sockaddr_ieee802154) > + sizeof(struct sockaddr)); + rc = proto_register(&ieee802154_raw_prot, 1); if (rc) goto out; -- 2.2.1