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=-2.1 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 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 EA437ECE587 for ; Mon, 14 Oct 2019 15:07:21 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id ACFE121882 for ; Mon, 14 Oct 2019 15:07:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="cJB7Budp" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ACFE121882 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 270F28E0005; Mon, 14 Oct 2019 11:07:21 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 220178E0001; Mon, 14 Oct 2019 11:07:21 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 1367D8E0005; Mon, 14 Oct 2019 11:07:21 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0210.hostedemail.com [216.40.44.210]) by kanga.kvack.org (Postfix) with ESMTP id E5FFB8E0001 for ; Mon, 14 Oct 2019 11:07:20 -0400 (EDT) Received: from smtpin29.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with SMTP id 8F4E2180137B4 for ; Mon, 14 Oct 2019 15:07:20 +0000 (UTC) X-FDA: 76042718640.29.cakes09_5d2b4fab7e234 X-HE-Tag: cakes09_5d2b4fab7e234 X-Filterd-Recvd-Size: 2362 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf04.hostedemail.com (Postfix) with ESMTP for ; Mon, 14 Oct 2019 15:07:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=+kPyuVZ7GikTrqAAnx8uWQZ3WSRuJyPoCPBltjrCcIU=; b=cJB7BudpxV9Vm6wrq4Qk6hIVv DyQh+zrg8imFWwRvDh9MMDi2m3/9rt/G/uA37uRT3x2WM3cpopzo75xnE8E7X1ZSfbrNbf4TvwJ1+ 0tG+M2W/nl0vg5GBwKNgymmOzQ1/eyMSvFK7wbr36tMh2k4pdyTVwJsuz4D31kp5cjrxc8TCITP+Y UlshVemVVvhOecv5XKlOseJbjLRsEeGsfHIQsWb5nwByuG0WWZQOpzh5YTZv50Zj3c5lsA4u2GH6m vMakhz9E8vEv0duQezUftGWkwJsmmsUk7DwzQldagIOxxU4+dT7e9OCsTR5f4bA5R1+LHmEKrxwbR P6jvq0fOg==; Received: from willy by bombadil.infradead.org with local (Exim 4.92.3 #3 (Red Hat Linux)) id 1iK1wE-0000ND-79; Mon, 14 Oct 2019 15:07:10 +0000 Date: Mon, 14 Oct 2019 08:07:10 -0700 From: Matthew Wilcox To: Walter Wu Cc: Andrey Ryabinin , Alexander Potapenko , Dmitry Vyukov , Matthias Brugger , kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, wsd_upstream@mediatek.com Subject: Re: [PATCH 2/2] kasan: add test for invalid size in memmove Message-ID: <20191014150710.GY32665@bombadil.infradead.org> References: <20191014103654.17982-1-walter-zh.wu@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191014103654.17982-1-walter-zh.wu@mediatek.com> User-Agent: Mutt/1.12.1 (2019-06-15) 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 Mon, Oct 14, 2019 at 06:36:54PM +0800, Walter Wu wrote: > Test size is negative numbers in memmove in order to verify > whether it correctly get KASAN report. You're not testing negative numbers, though. memmove() takes an unsigned type, so you're testing a very large number.