From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2FBCDC2D0A3 for ; Tue, 27 Oct 2020 00:16:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D524820791 for ; Tue, 27 Oct 2020 00:16:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603757816; bh=DLiyFuipU/ude/kExnWV2+NR1aV8KPIt8fhk/KEgN1U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=qmvJbM78ddS71rJCedyYCTLpFZLXkO97VqT19Op6BS2nHQW7yaW3qKHG20T1iDLne muyEitj3JFRH+2ZnZh96fVX5C/VjuvkgNbepBaYG+Z0MOLoty2ba0bKQDalmdvIVFx 3mHkdd079EJMO1Ii82JbAAvu18ErbXc9t1auBj8U= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2440687AbgJ0AQz (ORCPT ); Mon, 26 Oct 2020 20:16:55 -0400 Received: from mail.kernel.org ([198.145.29.99]:60286 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404314AbgJ0AK5 (ORCPT ); Mon, 26 Oct 2020 20:10:57 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 19AE821741; Tue, 27 Oct 2020 00:10:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603757456; bh=DLiyFuipU/ude/kExnWV2+NR1aV8KPIt8fhk/KEgN1U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bJ5aXXYDaQkG2qvvXtsxZOkjK5jJa4O54WomjNYDQ8Qd5FDUDH6iRAcROIw9oC97P O1bSwaY8BdGUtFJVkPYOGDh2rRwZEtmFRwz3xaxx9eniXzCu2CkK99V5oKvGUqjnG5 Vo78K498yEp2hBnRGOe3Dq8rIlPZ+B20p7DoXru4= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Tom Rix , Hans Verkuil , Mauro Carvalho Chehab , Sasha Levin , linux-media@vger.kernel.org, clang-built-linux@googlegroups.com Subject: [PATCH AUTOSEL 4.9 10/30] media: tw5864: check status of tw5864_frameinterval_get Date: Mon, 26 Oct 2020 20:10:24 -0400 Message-Id: <20201027001044.1027349-10-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201027001044.1027349-1-sashal@kernel.org> References: <20201027001044.1027349-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tom Rix [ Upstream commit 780d815dcc9b34d93ae69385a8465c38d423ff0f ] clang static analysis reports this problem tw5864-video.c:773:32: warning: The left expression of the compound assignment is an uninitialized value. The computed value will also be garbage fintv->stepwise.max.numerator *= std_max_fps; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^ stepwise.max is set with frameinterval, which comes from ret = tw5864_frameinterval_get(input, &frameinterval); fintv->stepwise.step = frameinterval; fintv->stepwise.min = frameinterval; fintv->stepwise.max = frameinterval; fintv->stepwise.max.numerator *= std_max_fps; When tw5864_frameinterval_get() fails, frameinterval is not set. So check the status and fix another similar problem. Signed-off-by: Tom Rix Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab Signed-off-by: Sasha Levin --- drivers/media/pci/tw5864/tw5864-video.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/media/pci/tw5864/tw5864-video.c b/drivers/media/pci/tw5864/tw5864-video.c index 27ff6e0d98453..023ff9ebde5e7 100644 --- a/drivers/media/pci/tw5864/tw5864-video.c +++ b/drivers/media/pci/tw5864/tw5864-video.c @@ -767,6 +767,9 @@ static int tw5864_enum_frameintervals(struct file *file, void *priv, fintv->type = V4L2_FRMIVAL_TYPE_STEPWISE; ret = tw5864_frameinterval_get(input, &frameinterval); + if (ret) + return ret; + fintv->stepwise.step = frameinterval; fintv->stepwise.min = frameinterval; fintv->stepwise.max = frameinterval; @@ -785,6 +788,9 @@ static int tw5864_g_parm(struct file *file, void *priv, cp->capability = V4L2_CAP_TIMEPERFRAME; ret = tw5864_frameinterval_get(input, &cp->timeperframe); + if (ret) + return ret; + cp->timeperframe.numerator *= input->frame_interval; cp->capturemode = 0; cp->readbuffers = 2; -- 2.25.1