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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B8C52C001DE for ; Fri, 18 Aug 2023 03:23:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1357513AbjHRDXC (ORCPT ); Thu, 17 Aug 2023 23:23:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55628 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1357595AbjHRDWq (ORCPT ); Thu, 17 Aug 2023 23:22:46 -0400 Received: from omta34.uswest2.a.cloudfilter.net (omta34.uswest2.a.cloudfilter.net [35.89.44.33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 00F4B3A99; Thu, 17 Aug 2023 20:22:41 -0700 (PDT) Received: from eig-obgw-6004a.ext.cloudfilter.net ([10.0.30.197]) by cmsmtp with ESMTP id WmuJqzgHqfaVXWq4PqUdec; Fri, 18 Aug 2023 03:22:41 +0000 Received: from gator4166.hostgator.com ([108.167.133.22]) by cmsmtp with ESMTPS id Wq4Oq4JDg1rJFWq4OqIcJT; Fri, 18 Aug 2023 03:22:41 +0000 X-Authority-Analysis: v=2.4 cv=PYPsOwtd c=1 sm=1 tr=0 ts=64dee401 a=1YbLdUo/zbTtOZ3uB5T3HA==:117 a=WzbPXH4gqzPVN0x6HrNMNA==:17 a=OWjo9vPv0XrRhIrVQ50Ab3nP57M=:19 a=dLZJa+xiwSxG16/P+YVxDGlgEgI=:19 a=IkcTkHD0fZMA:10 a=UttIx32zK-AA:10 a=wYkD_t78qR0A:10 a=NEAV23lmAAAA:8 a=VwQbUJbxAAAA:8 a=c-n4J4-pAAAA:8 a=JfrnYn6hAAAA:8 a=cm27Pg_UAAAA:8 a=HvF037n1xESchLcPDVoA:9 a=QEXdDO2ut3YA:10 a=AjGcO6oz07-iQ99wixmX:22 a=L0NDqeB7ZLmQzAogN4cw:22 a=1CNFftbPRP8L7MoqJWF3:22 a=xmb-EsYY8bH0VWELuYED:22 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=embeddedor.com; s=default; h=Content-Transfer-Encoding:Content-Type: In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date:Message-ID:Sender :Reply-To: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=LYJTSI47qRI3iyXZkZwZcmiHPpw4Jzbz9dSwhVVOo70=; b=JUFI8Jbz5GelUOAfC8SooMKQ/0 IhFjC2k1xiHiDBKyspCVjL06H2zueFbYAc/AtH/PW18pTrMuSf83fSTnCDN/twhokYogq0UvD1z92 3qnwG1hTyTgA7S/uul0YYI0w/w9g9icexLbvZkD+vGEGrEaoV65nRFbjzQRvStXBI4WHlkpRUa2gs tQgfpn67Z51mgq1lT5CxRxfDDHSQPzGaDu3a3Eg+SoHpAVFJ135nog4fP/Q9gJVI2EPnkYG4Hf4zy dGVvmR0bdzEbjIUDL9zHjKgqB7BFaEhts5vB0FW4caFmE0m+/fQQGBKcH3C1hBMFuRVr4f5keVpwq 0Bqhschw==; Received: from 187-162-21-192.static.axtel.net ([187.162.21.192]:60882 helo=[192.168.15.8]) by gator4166.hostgator.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.96) (envelope-from ) id 1qWp14-001E9O-06; Thu, 17 Aug 2023 21:15:10 -0500 Message-ID: <7cd8357b-c35d-a279-c510-11883a7e2eb7@embeddedor.com> Date: Thu, 17 Aug 2023 20:16:08 -0600 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.13.0 Subject: Re: [PATCH 20/21] dmaengine: uniphier-xdmac: Annotate struct uniphier_xdmac_device with __counted_by Content-Language: en-US To: Kees Cook , Vinod Koul Cc: Kunihiko Hayashi , Masami Hiramatsu , dmaengine@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Hector Martin , Sven Peter , Alyssa Rosenzweig , Ludovic Desroches , Tudor Ambarus , Lars-Peter Clausen , Zhou Wang , Jie Hai , Andy Gross , Bjorn Andersson , Konrad Dybcio , Green Wan , Orson Zhai , Baolin Wang , Chunyan Zhang , Patrice Chotard , Maxime Coquelin , Alexandre Torgue , Laxman Dewangan , Jon Hunter , Thierry Reding , Peter Ujfalusi , Yu Kuai , Greg Kroah-Hartman , Jordy Zomer , Jernej Skrabec , Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-kernel@vger.kernel.org, asahi@lists.linux.dev, linux-arm-msm@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-tegra@vger.kernel.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org References: <20230817235428.never.111-kees@kernel.org> <20230817235859.49846-20-keescook@chromium.org> From: "Gustavo A. R. Silva" In-Reply-To: <20230817235859.49846-20-keescook@chromium.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator4166.hostgator.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - embeddedor.com X-BWhitelist: no X-Source-IP: 187.162.21.192 X-Source-L: No X-Exim-ID: 1qWp14-001E9O-06 X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: 187-162-21-192.static.axtel.net ([192.168.15.8]) [187.162.21.192]:60882 X-Source-Auth: gustavo@embeddedor.com X-Email-Count: 0 X-Org: HG=hgshared;ORG=hostgator; X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes X-CMAE-Envelope: MS4xfAN/MmCDWXcngMdb2ypuH7Wfz2tjh6GsAOOeFVrrGzvmuSKMUgATqqjv3pzQ/LYDSU7X/yaiIkRQ3QPH+akOpuVeFpJYf/4WbRawkVozrZ5ATyihPSDU MbfCp+J3skxwz0qeSckMbVRlZq1YEOcgSiHodXTtHYf3nQmim3BYaO2wZK5Qc3fAcWtJKmWVxbZB/2z16W4f8tQ/omap3As0ofu0TU8OzHfZckAdT4o3q5Mg QXUHMTil9NhLiWTUgCj5G8Sdu0AuJicRMitgIj0IZCYiB4Bbk2vjiPTAHVDUM/0179hs3uLoI/8iDs2JhK9AWrSvkFpi8DrGAYpR/LHEnv6CWpHH6tQgRVuG gkTYmiE3Ctxe2XxoZj2wxjkzezPNm6ICzU9TdGtdhfO4fphH4DU= Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org On 8/17/23 17:58, Kees Cook wrote: > Prepare for the coming implementation by GCC and Clang of the __counted_by > attribute. Flexible array members annotated with __counted_by can have > their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS > (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family > functions). > > As found with Coccinelle[1], add __counted_by for struct uniphier_xdmac_device. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Vinod Koul > Cc: Kunihiko Hayashi > Cc: Masami Hiramatsu > Cc: dmaengine@vger.kernel.org > Cc: linux-arm-kernel@lists.infradead.org > Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Thanks -- Gustavo > --- > drivers/dma/uniphier-xdmac.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/dma/uniphier-xdmac.c b/drivers/dma/uniphier-xdmac.c > index dd51522879a7..3a8ee2b173b5 100644 > --- a/drivers/dma/uniphier-xdmac.c > +++ b/drivers/dma/uniphier-xdmac.c > @@ -97,7 +97,7 @@ struct uniphier_xdmac_device { > struct dma_device ddev; > void __iomem *reg_base; > int nr_chans; > - struct uniphier_xdmac_chan channels[]; > + struct uniphier_xdmac_chan channels[] __counted_by(nr_chans); > }; > > static struct uniphier_xdmac_chan *