From patchwork Mon Feb 20 12:34:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Igor Artemiev X-Patchwork-Id: 655592 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3E095C636CC for ; Mon, 20 Feb 2023 12:42:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232128AbjBTMmS (ORCPT ); Mon, 20 Feb 2023 07:42:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60832 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232149AbjBTMmM (ORCPT ); Mon, 20 Feb 2023 07:42:12 -0500 X-Greylist: delayed 381 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Mon, 20 Feb 2023 04:41:56 PST Received: from tretyak2.mcst.ru (tretyak2.mcst.ru [212.5.119.215]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 47A481C583; Mon, 20 Feb 2023 04:41:56 -0800 (PST) Received: from tretyak2.mcst.ru (localhost [127.0.0.1]) by tretyak2.mcst.ru (Postfix) with ESMTP id 95C27102397; Mon, 20 Feb 2023 15:35:31 +0300 (MSK) Received: from frog.lab.sun.mcst.ru (frog.lab.sun.mcst.ru [172.16.4.50]) by tretyak2.mcst.ru (Postfix) with ESMTP id 8C65B1023A0; Mon, 20 Feb 2023 15:35:11 +0300 (MSK) Received: from artemiev-i.lab.sun.mcst.ru (avior-1 [192.168.53.223]) by frog.lab.sun.mcst.ru (8.13.4/8.12.11) with ESMTP id 31KCZ9RW010128; Mon, 20 Feb 2023 15:35:09 +0300 From: Igor Artemiev To: Dmitry Torokhov Cc: Igor Artemiev , linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, lvc-project@linuxtesting.org Subject: [lvc-project] [PATCH] Input: cypress_ps2 - fix cypress_ps2_sendbyte() result check Date: Mon, 20 Feb 2023 15:34:58 +0300 Message-Id: <20230220123458.712530-1-Igor.A.Artemiev@mcst.ru> X-Mailer: git-send-email 2.39.0.152.ga5737674b6 MIME-Version: 1.0 X-Anti-Virus: Kaspersky Anti-Virus for Linux Mail Server 5.6.39/RELEASE, bases: 20111107 #2745587, check: 20230220 notchecked X-AV-Checked: ClamAV using ClamSMTP Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org cypress_ps2_sendbyte() returns 0 or an error code greater than 0. The cypress_ps2_read_cmd_status() function assumes that cypress_ps2_read_cmd_status() will return a negative value on error. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: 0799a924bc93 ("Input: add support for Cypress PS/2 Trackpads") Signed-off-by: Igor Artemiev --- drivers/input/mouse/cypress_ps2.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/input/mouse/cypress_ps2.c b/drivers/input/mouse/cypress_ps2.c index d272f1ec27ba..b170959e2ad3 100644 --- a/drivers/input/mouse/cypress_ps2.c +++ b/drivers/input/mouse/cypress_ps2.c @@ -114,7 +114,7 @@ static int cypress_ps2_read_cmd_status(struct psmouse *psmouse, memset(param, 0, pktsize); rc = cypress_ps2_sendbyte(psmouse, 0xe9); - if (rc < 0) + if (rc > 0) goto out; wait_event_timeout(ps2dev->wait,