From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755666AbcHSHSb (ORCPT ); Fri, 19 Aug 2016 03:18:31 -0400 Received: from mx2.suse.de ([195.135.220.15]:49739 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755539AbcHSHMI (ORCPT ); Fri, 19 Aug 2016 03:12:08 -0400 X-Amavis-Alert: BAD HEADER SECTION, Duplicate header field: "References" From: Jiri Slaby To: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, =?UTF-8?q?Amadeusz=20S=C5=82awi=C5=84ski?= , Marcel Holtmann , Jiri Slaby Subject: [PATCH 3.12 075/100] Bluetooth: Fix l2cap_sock_setsockopt() with optname BT_RCVMTU Date: Fri, 19 Aug 2016 09:11:14 +0200 Message-Id: <0d0633f68889d5bbf7cbe2b66bc0d3de372a4d46.1471589700.git.jslaby@suse.cz> X-Mailer: git-send-email 2.9.3 In-Reply-To: References: In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Amadeusz Sławiński 3.12-stable review patch. If anyone has any objections, please let me know. =============== commit 23bc6ab0a0912146fd674a0becc758c3162baabc upstream. When we retrieve imtu value from userspace we should use 16 bit pointer cast instead of 32 as it's defined that way in headers. Fixes setsockopt calls on big-endian platforms. Signed-off-by: Amadeusz Sławiński Signed-off-by: Marcel Holtmann Signed-off-by: Jiri Slaby --- net/bluetooth/l2cap_sock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c index 2710e850b74c..1fbd26feda09 100644 --- a/net/bluetooth/l2cap_sock.c +++ b/net/bluetooth/l2cap_sock.c @@ -720,7 +720,7 @@ static int l2cap_sock_setsockopt(struct socket *sock, int level, int optname, break; } - if (get_user(opt, (u32 __user *) optval)) { + if (get_user(opt, (u16 __user *) optval)) { err = -EFAULT; break; } -- 2.9.3