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Tue, 18 Feb 2025 01:04:51 -0500 (EST) X-Mailer: MessagingEngine.com Webmail Interface Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Date: Tue, 18 Feb 2025 07:04:29 +0100 From: "Arnd Bergmann" To: "kernel test robot" Cc: "Philip Li" , "Elizabeth Figura" , "kernel test robot" , oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org Message-Id: In-Reply-To: References: <202502072019.LYoCR9bF-lkp@intel.com> <2421077.NG923GbCHz@camazotz> <9791da8a-fb5f-46d0-a86f-66738293d155@app.fastmail.com> Subject: Re: include/linux/thread_info.h:259:25: error: call to '__bad_copy_to' declared with attribute error: copy destination size is too small Content-Type: text/plain Content-Transfer-Encoding: 7bit On Tue, Feb 18, 2025, at 03:44, Oliver Sang wrote: > On Fri, Feb 14, 2025 at 12:22:33PM +0100, Arnd Bergmann wrote: >> On Fri, Feb 14, 2025, at 09:44, Philip Li wrote: >> > On Mon, Feb 10, 2025 at 02:39:46PM -0600, Elizabeth Figura wrote: >> >> Maybe the change below would address it? (Not sure I handled the >> "+1" right here, but something like that should make it obvious >> to the compiler what the check is). > > yes, below change fixed the build error we reported. thanks > > Tested-by: kernel test robot Thanks for testing! Elizabeth, can you turn this into a proper patch with "Suggested-by: Arnd Bergmann "? I assume you'll want to make some slight changes to ensure it's both readable and correct, but apparently calculating the size in bytes and do both the range checking and the copy based on that is what makes gcc see the limit correctly. Arnd