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Message-ID: Date: Tue, 20 Oct 2026 13:18:35 +0300 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] stack: fix pile GCC memcpy warnings To: =?UTF-8?Q?Morten_Br=C3=B8rup?= , dev@dpdk.org, Thomas Monjalon Cc: Konstantin Ananyev , Andrew Rybchenko , Bruce Richardson , Stephen Hemminger References: <20261020084944.3188987-1-mb@smartsharesystems.com> Content-Language: en-US From: Ali Alnubani In-Reply-To: <20261020084944.3188987-1-mb@smartsharesystems.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-ClientProxiedBy: FR4P281CA0351.DEUP281.PROD.OUTLOOK.COM (2603:10a6:d10:f4::14) To SJ2PR12MB9212.namprd12.prod.outlook.com (2603:10b6:a03:563::19) X-Archived-By: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ2PR12MB9212:EE_|IA0PPF316EEACD8:EE_ X-MS-Office365-Filtering-Correlation-Id: da014e0f-ee29-430e-0428-08df2e938405 X-LD-Processed: 43083d15-7273-40c1-b7db-39efd9ccc17a,ExtAddr X-MS-Exchange-SenderADCheck: 1 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X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Archive: List-Post: List-Help: List-Subscribe: , X-Spam-Status: No, score=-12.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On 10/20/26 11:49 AM, Morten Brørup wrote: > On architectures where rte_memcpy() is defined as memcpy(), > GCC warns about source/destination overflow when copying more than the > source/destination size, even for code paths that are not taken in cases > where the sizes are smaller. > > The relevant compiler warnings were disabled for GCC at the two > occurrences, and comments describing the reason were added. > > NB: > It has not been investigated which GCC versions are affected. > GCC version 10 and up was chosen because that was what the previous > versions of x86 rte_memcpy() disabled sligthly similar warnings for. > > PS: > The alternative was to obfuscate the code, but that would make the code > less readable, and might have unintended effects on architectures and > compilers not suffering by this issue. > > Bugzilla ID: 2061 > Fixes: ee0822a0ef41 ("stack: introduce pile") > > The pile was introduce with this DPDK release, so no need to backport. > > Reported-by: Ali Alnubani > Signed-off-by: Morten Brørup > --- Build passes with this patch. Tested-by: Ali Alnubani Thanks, Ali