From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S971696AbeCSUyR (ORCPT ); Mon, 19 Mar 2018 16:54:17 -0400 Received: from smtp06.smtpout.orange.fr ([80.12.242.128]:33490 "EHLO smtp.smtpout.orange.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S971632AbeCSUyM (ORCPT ); Mon, 19 Mar 2018 16:54:12 -0400 X-ME-Helo: linux.numericable.fr X-ME-Auth: Y2hyaXN0b3BoZS5qYWlsbGV0QHdhbmFkb28uZnI= X-ME-Date: Mon, 19 Mar 2018 21:54:11 +0100 X-ME-IP: 77.198.79.136 From: Christophe JAILLET To: masaki.ota@jp.alps.com, jikos@kernel.org, benjamin.tissoires@redhat.com Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org, Christophe JAILLET Subject: [PATCH 1/4] HID: alps: Report an error if we receive invalid data in 't4_read_write_register()' Date: Mon, 19 Mar 2018 21:53:26 +0100 Message-Id: X-Mailer: git-send-email 2.14.1 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If the data received is not what is expected, we should return an error. Otherwise, we return 0 or a positive value which will be interpreted as success, but '*read_val' has not been updated. Fixes: 73196ebe134d ("HID: alps: add support for Alps T4 Touchpad device") Signed-off-by: Christophe JAILLET --- Untested --- drivers/hid/hid-alps.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/hid/hid-alps.c b/drivers/hid/hid-alps.c index b1eeb4839bfc..925396fdf0d9 100644 --- a/drivers/hid/hid-alps.c +++ b/drivers/hid/hid-alps.c @@ -219,6 +219,8 @@ static int t4_read_write_register(struct hid_device *hdev, u32 address, goto exit_readbuf; } + ret = -EINVAL; + if (*(u32 *)&readbuf[6] != address) { dev_err(&hdev->dev, "read register address error (%x,%x)\n", *(u32 *)&readbuf[6], address); -- 2.14.1 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christophe JAILLET Date: Mon, 19 Mar 2018 20:53:26 +0000 Subject: [PATCH 1/4] HID: alps: Report an error if we receive invalid data in 't4_read_write_register()' Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: masaki.ota@jp.alps.com, jikos@kernel.org, benjamin.tissoires@redhat.com Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org, Christophe JAILLET If the data received is not what is expected, we should return an error. Otherwise, we return 0 or a positive value which will be interpreted as success, but '*read_val' has not been updated. Fixes: 73196ebe134d ("HID: alps: add support for Alps T4 Touchpad device") Signed-off-by: Christophe JAILLET --- Untested --- drivers/hid/hid-alps.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/hid/hid-alps.c b/drivers/hid/hid-alps.c index b1eeb4839bfc..925396fdf0d9 100644 --- a/drivers/hid/hid-alps.c +++ b/drivers/hid/hid-alps.c @@ -219,6 +219,8 @@ static int t4_read_write_register(struct hid_device *hdev, u32 address, goto exit_readbuf; } + ret = -EINVAL; + if (*(u32 *)&readbuf[6] != address) { dev_err(&hdev->dev, "read register address error (%x,%x)\n", *(u32 *)&readbuf[6], address); -- 2.14.1