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 03F88C56201 for ; Tue, 27 Oct 2020 00:23:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BE75920780 for ; Tue, 27 Oct 2020 00:23:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603758180; bh=hW8oAgtPCSp1/+yVU3mvQFbxtOKPmK/KoxuZzgXE32A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=ol83Q+TkwkwcP2MtcM6MpGdA5mpFyQRWFo0MyV6ITQXXar1+QSAvOSleXBShHeHec ifdPntviUNHduNGlgzyte5qCg1Rlugt0ngTxZ2fgEYn9frintqia+zfYRm1fkQbkaE czClHk6ZNcDQw7TNLy/dHbaRLuKlVW6cZm3b3ZpU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2441368AbgJ0AXA (ORCPT ); Mon, 26 Oct 2020 20:23:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:34054 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2410312AbgJZXzh (ORCPT ); Mon, 26 Oct 2020 19:55:37 -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 12B812222C; Mon, 26 Oct 2020 23:55:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603756536; bh=hW8oAgtPCSp1/+yVU3mvQFbxtOKPmK/KoxuZzgXE32A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ER1bM0M9+Z8qDIsYP4UZnjvudybCaLg55AqUR7LlkoZnR8SSde5jHPKZsUcca+y/7 wiRQ/Hofe+gjbHQ9K4dPpWf/LVBv9+Mw3bJQlaZq8Un2V524UyuJZ04395kYCsOWYp rs0c8b7Rr2k3EYMpm/on9K8AYvlwp4XgSZ9vPOqc= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Tom Rix , Arnd Bergmann , Sam Ravnborg , Sasha Levin , dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org, clang-built-linux@googlegroups.com Subject: [PATCH AUTOSEL 5.4 16/80] video: fbdev: pvr2fb: initialize variables Date: Mon, 26 Oct 2020 19:54:12 -0400 Message-Id: <20201026235516.1025100-16-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20201026235516.1025100-1-sashal@kernel.org> References: <20201026235516.1025100-1-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-fbdev@vger.kernel.org From: Tom Rix [ Upstream commit 8e1ba47c60bcd325fdd097cd76054639155e5d2e ] clang static analysis reports this repesentative error pvr2fb.c:1049:2: warning: 1st function call argument is an uninitialized value [core.CallAndMessage] if (*cable_arg) ^~~~~~~~~~~~~~~ Problem is that cable_arg depends on the input loop to set the cable_arg[0]. If it does not, then some random value from the stack is used. A similar problem exists for output_arg. So initialize cable_arg and output_arg. Signed-off-by: Tom Rix Acked-by: Arnd Bergmann Signed-off-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20200720191845.20115-1-trix@redhat.com Signed-off-by: Sasha Levin --- drivers/video/fbdev/pvr2fb.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/video/fbdev/pvr2fb.c b/drivers/video/fbdev/pvr2fb.c index 0a3b2b7c78912..c916e91614436 100644 --- a/drivers/video/fbdev/pvr2fb.c +++ b/drivers/video/fbdev/pvr2fb.c @@ -1016,6 +1016,8 @@ static int __init pvr2fb_setup(char *options) if (!options || !*options) return 0; + cable_arg[0] = output_arg[0] = 0; + while ((this_opt = strsep(&options, ","))) { if (!*this_opt) continue; -- 2.25.1