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=unavailable 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 5FC57C4363A for ; Tue, 27 Oct 2020 00:22:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 11D1E20754 for ; Tue, 27 Oct 2020 00:22:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603758142; bh=HCiPYBeaQLSGD6/3OWfDL/zLVxU5ya9mC8ZtFhltUhY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=CJTEKGbNUTY1hXXsiXbgFQ+RK+NPMDtVRtOFDpFr9oiqlSffKIixNJ5Q93Rt3XyMh dE65aijtw51nfB5VKBLY0U3nRbnReBCj7YG66SLyEAhz9RMHCOP/Z4RsB7UWCqcXE2 uiGZP6EDMjinwIsf0ikDn0IPzmx5wC7GGWt6t30w= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2441301AbgJ0AWQ (ORCPT ); Mon, 26 Oct 2020 20:22:16 -0400 Received: from mail.kernel.org ([198.145.29.99]:34626 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2410962AbgJZXzr (ORCPT ); Mon, 26 Oct 2020 19:55:47 -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 E3A1122242; Mon, 26 Oct 2020 23:55:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1603756546; bh=HCiPYBeaQLSGD6/3OWfDL/zLVxU5ya9mC8ZtFhltUhY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QtopRAX/cR7ghBqePyiutJB6ANQaVzJJ3B4NUytUOS+6VTs16zCTVBWZ7Xu93g6Ce WjTXp2dZ9N6WQZ3EkTw1HzPPEYRxjMY7vcmgjgW6djng1CJTECpaLryyrEgHZ7+Xgz D2L8N8oBl9qaSeo5Ro8+qNZngnbwQvT0sEVVOdMs= 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 5.4 24/80] media: tw5864: check status of tw5864_frameinterval_get Date: Mon, 26 Oct 2020 19:54:20 -0400 Message-Id: <20201026235516.1025100-24-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-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 09732eed7eb4f..656142c7a2cc7 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