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=-3.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no 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 D2956C55179 for ; Sun, 25 Oct 2020 19:23:26 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 549FB20885 for ; Sun, 25 Oct 2020 19:23:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 549FB20885 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=perches.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 9D0886B005D; Sun, 25 Oct 2020 15:23:25 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 957CA6B0062; Sun, 25 Oct 2020 15:23:25 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 821136B0068; Sun, 25 Oct 2020 15:23:25 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0121.hostedemail.com [216.40.44.121]) by kanga.kvack.org (Postfix) with ESMTP id 517896B005D for ; Sun, 25 Oct 2020 15:23:25 -0400 (EDT) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id D5B1F181AC9CC for ; Sun, 25 Oct 2020 19:23:24 +0000 (UTC) X-FDA: 77411421528.17.snake68_0c11dab2726d Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin17.hostedemail.com (Postfix) with ESMTP id B50DA180D0180 for ; Sun, 25 Oct 2020 19:23:24 +0000 (UTC) X-HE-Tag: snake68_0c11dab2726d X-Filterd-Recvd-Size: 2959 Received: from smtprelay.hostedemail.com (smtprelay0076.hostedemail.com [216.40.44.76]) by imf39.hostedemail.com (Postfix) with ESMTP for ; Sun, 25 Oct 2020 19:23:24 +0000 (UTC) Received: from filter.hostedemail.com (clb03-v110.bra.tucows.net [216.40.38.60]) by smtprelay01.hostedemail.com (Postfix) with ESMTP id DFF89100E7B42; Sun, 25 Oct 2020 19:23:23 +0000 (UTC) X-Session-Marker: 6A6F6540706572636865732E636F6D X-HE-Tag: view04_0705c4a2726d X-Filterd-Recvd-Size: 1750 Received: from XPS-9350.home (unknown [47.151.133.149]) (Authenticated sender: joe@perches.com) by omf10.hostedemail.com (Postfix) with ESMTPA; Sun, 25 Oct 2020 19:23:22 +0000 (UTC) Message-ID: <7e76d1c3239bf2d33889c4874bc9919fee6b6ebe.camel@perches.com> Subject: Re: drivers/video/backlight/ltv350qv.c:192:12: warning: stack frame size of 13472 bytes in function 'ltv350qv_power' From: Joe Perches To: Andrew Morton , kernel test robot Cc: Andrey Konovalov , kbuild-all@lists.01.org, clang-built-linux@googlegroups.com, linux-kernel@vger.kernel.org, Linux Memory Management List Date: Sun, 25 Oct 2020 12:23:21 -0700 In-Reply-To: <20201025121708.04d4070a44e28146baf9a6a7@linux-foundation.org> References: <202010260230.VivTG0Gb-lkp@intel.com> <20201025121708.04d4070a44e28146baf9a6a7@linux-foundation.org> Content-Type: text/plain; charset="ISO-8859-1" User-Agent: Evolution 3.38.1-1 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Sun, 2020-10-25 at 12:17 -0700, Andrew Morton wrote: > On Mon, 26 Oct 2020 02:15:37 +0800 kernel test robot wrote: > > vim +/ltv350qv_power +192 drivers/video/backlight/ltv350qv.c > > Odd - the code looks pretty normal. It is possible that your compiler > is (crazily) inlining ltv350qv_write_reg()? There's a lot of stack used when gcc's compiler options include -fsanitize=object-size This option enables instrumentation of memory references using the "__builtin_object_size" function. Various out of bounds pointer accesses are detected. Perhaps this config enables it?