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R. Silva" , Catalin Marinas , Will Deacon , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Nick Desaulniers , Bill Wendling , Justin Stitt , linux-hardening@vger.kernel.org, linux-arm-kernel@lists.infradead.org, llvm@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH] hardening: Refresh KCFI options, add some more Message-ID: <202404292233.9A98A7C@keescook> References: <20240426222940.work.884-kees@kernel.org> <20240429221650.GA3666021@dev-arch.thelio-3990X> Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240429221650.GA3666021@dev-arch.thelio-3990X> On Mon, Apr 29, 2024 at 03:16:50PM -0700, Nathan Chancellor wrote: > On Fri, Apr 26, 2024 at 03:29:44PM -0700, Kees Cook wrote: > [...] > > +# Enable Kernel Control Flow Integrity (currently Clang only). > > +CONFIG_CFI_CLANG=y > > +# CONFIG_CFI_PERMISSIVE is not set > > Should this be a part of kernel/configs/hardening.config because RISC-V > supports it (and 32-bit ARM will soon too)? Probably yes. I was worried it might be "noisy" for archs that don't support it, but frankly if someone is using "make hardening.config" they probably want to know about unsupported options. :) -- Kees Cook