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Wed, 28 May 2025 12:59:04 -0400 (EDT) X-Mailer: MessagingEngine.com Webmail Interface Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ThreadId: Tff0b0175c39a25d0 Date: Wed, 28 May 2025 18:58:44 +0200 From: "Arnd Bergmann" To: "Kees Cook" , "Eric Biggers" , "Justin Stitt" Cc: linux-hardening@vger.kernel.org, oe-lkp@lists.linux.dev, "kernel test robot" , linux-kernel@vger.kernel.org, "Herbert Xu" , linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linux-s390@vger.kernel.org, linux-crypto@vger.kernel.org, "kernel test robot" , llvm@lists.linux.dev Message-Id: <324a5724-7bde-42f2-8910-e70b5b5f9d9e@app.fastmail.com> In-Reply-To: <202505280937.6802F0F210@keescook> References: <202505281024.f42beaa7-lkp@intel.com> <20250528061427.GA42911@sol> <202505280937.6802F0F210@keescook> Subject: Re: [linus:master] [crypto] 40b9969796: UBSAN:unsigned-integer-overflow_in_lib/crypto/chacha20poly1305-selftest.c Content-Type: text/plain Content-Transfer-Encoding: 7bit On Wed, May 28, 2025, at 18:45, Kees Cook wrote: > On Tue, May 27, 2025 at 11:14:27PM -0700, Eric Biggers wrote: >> On Wed, May 28, 2025 at 01:15:05PM +0800, kernel test robot wrote: > I'm not sure how to enforce "don't enable this unless you're developing > the Overflow Behavior Types" with current Kconfig, given the randconfig > gap... I have some memory of Arnd doing something special with his > randconfigs to avoid these kinds of things, but I can't find it now. > The main thing I do on the randconfig builds to avoid obscure issues is to force CONFIG_COMPILE_TEST=y, but that only works for build testing, not actually running it. Arnd