From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:33432 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932073AbeFXPuo (ORCPT ); Sun, 24 Jun 2018 11:50:44 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ivan Bornyakov , "David S. Miller" , Sasha Levin Subject: [PATCH 4.9 06/39] atm: zatm: fix memcmp casting Date: Sun, 24 Jun 2018 23:23:53 +0800 Message-Id: <20180624152352.741968302@linuxfoundation.org> In-Reply-To: <20180624152352.038950449@linuxfoundation.org> References: <20180624152352.038950449@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ivan Bornyakov [ Upstream commit f9c6442a8f0b1dde9e755eb4ff6fa22bcce4eabc ] memcmp() returns int, but eprom_try_esi() cast it to unsigned char. One can lose significant bits and get 0 from non-0 value returned by the memcmp(). Signed-off-by: Ivan Bornyakov Signed-off-by: David S. Miller Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman --- drivers/atm/zatm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/atm/zatm.c +++ b/drivers/atm/zatm.c @@ -1151,8 +1151,8 @@ static void eprom_get_byte(struct zatm_d } -static unsigned char eprom_try_esi(struct atm_dev *dev, unsigned short cmd, - int offset, int swap) +static int eprom_try_esi(struct atm_dev *dev, unsigned short cmd, int offset, + int swap) { unsigned char buf[ZEPROM_SIZE]; struct zatm_dev *zatm_dev;