From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from omta034.useast.a.cloudfilter.net (omta034.useast.a.cloudfilter.net [44.202.169.33]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8CE2310947 for ; Fri, 15 Sep 2023 20:29:20 +0000 (UTC) Received: from eig-obgw-5006a.ext.cloudfilter.net ([10.0.29.179]) by cmsmtp with ESMTP id h8dGqbD6mez0ChFPUqBogX; Fri, 15 Sep 2023 20:27:28 +0000 Received: from gator4166.hostgator.com ([108.167.133.22]) by cmsmtp with ESMTPS id hFPpqTSDUyBEYhFPqqjoTZ; Fri, 15 Sep 2023 20:27:50 +0000 X-Authority-Analysis: v=2.4 cv=durItns4 c=1 sm=1 tr=0 ts=6504be46 a=1YbLdUo/zbTtOZ3uB5T3HA==:117 a=WzbPXH4gqzPVN0x6HrNMNA==:17 a=OWjo9vPv0XrRhIrVQ50Ab3nP57M=:19 a=dLZJa+xiwSxG16/P+YVxDGlgEgI=:19 a=IkcTkHD0fZMA:10 a=zNV7Rl7Rt7sA:10 a=wYkD_t78qR0A:10 a=NEAV23lmAAAA:8 a=20KFwNOVAAAA:8 a=VwQbUJbxAAAA:8 a=cm27Pg_UAAAA:8 a=1rGUjaHSoLxGkM6IGjIA:9 a=QEXdDO2ut3YA:10 a=AjGcO6oz07-iQ99wixmX: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=a6FgjMylHXWTpHsDUs+9t/FgxU+P0Q11ISaPe1Rcv8w=; b=xWE1ePG1pJ/MBNbTKML7mWpv7+ hTvnsr9J5+w66OSudqoVfFSRzjW5ualO3+2HxahufVMkVae2VyPglsd2DeLXLnuV1Ne268PVqoGBF gzuKSPgYIz+MgtmJ26p20dnfLIo8DVRgTtenBjGhRAdS2bJkRkrHDxTBcIuUxSVjYrRF49gs3R7ua Ms4rqhUu2JQbzLFgPadTU4xcpViBtzieu9urP9YXMOfwBdpmznz+9rr/BLun/ZoSUCOGOjhB1NZ6s mqxNn7VZdQMxomnxvX9BExnhmVSfJ0i9xHBOyYo9Tb+JkulIc3GUeS+WVY2uAjoqv0pbx1mT0eyBI HuQ4ktjA==; Received: from 187-162-21-192.static.axtel.net ([187.162.21.192]:51030 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 1qhFPo-002Jct-1H; Fri, 15 Sep 2023 15:27:48 -0500 Message-ID: <6bf23c7f-9f7f-1d9e-9aa0-e163608447ae@embeddedor.com> Date: Fri, 15 Sep 2023 14:28:44 -0600 Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: 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] dm raid: Annotate struct raid_set with __counted_by Content-Language: en-US To: Kees Cook , Alasdair Kergon Cc: Mike Snitzer , dm-devel@redhat.com, Nathan Chancellor , Nick Desaulniers , Tom Rix , linux-kernel@vger.kernel.org, llvm@lists.linux.dev, linux-hardening@vger.kernel.org References: <20230915200335.never.098-kees@kernel.org> From: "Gustavo A. R. Silva" In-Reply-To: <20230915200335.never.098-kees@kernel.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 - lists.linux.dev 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: 1qhFPo-002Jct-1H 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]:51030 X-Source-Auth: gustavo@embeddedor.com X-Email-Count: 76 X-Org: HG=hgshared;ORG=hostgator; X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes X-CMAE-Envelope: MS4xfDHCY3vvTAyWfGG/Ua3saMmPScQjbeTYomdk+okGRJYBIrUKYz1GJm21p6BEKkcej69EFbddKOMC1Bh1Xdt6o2ImhPm0ddU2UvXEP7e9vI4tQnG45dZr PzH1xIwi3LEUVfmVSLl6zxaakCdlUfL1kDWYm9amzNyT4PT07YyhE2WPRt3vRA0y7pNqAR7fPQxTIMzAFZ7gu/uMRqEnINPHNWk= On 9/15/23 14:03, 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 raid_set. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Alasdair Kergon > Cc: Mike Snitzer > Cc: dm-devel@redhat.com > Signed-off-by: Kees Cook Reviewed-by: Gustavo A. R. Silva Thanks -- Gustavo > --- > drivers/md/dm-raid.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c > index 5f9991765f27..9755788e8b78 100644 > --- a/drivers/md/dm-raid.c > +++ b/drivers/md/dm-raid.c > @@ -254,7 +254,7 @@ struct raid_set { > int mode; > } journal_dev; > > - struct raid_dev dev[]; > + struct raid_dev dev[] __counted_by(raid_disks); > }; > > static void rs_config_backup(struct raid_set *rs, struct rs_layout *l)