linux-hardening - Re: [RFC PATCH 06/21] cfi: Switch to -fsanitize=kcfi

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Message-ID: <Ymz8rwWGjkVCfMZ1@hirez.programming.kicks-ass.net>
Date:   Sat, 30 Apr 2022 11:09:03 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Sami Tolvanen <samitolvanen@...gle.com>
Cc:     linux-kernel@...r.kernel.org, Kees Cook <keescook@...omium.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>, x86@...nel.org,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Joao Moreira <joao@...rdrivepizza.com>,
        Sedat Dilek <sedat.dilek@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        linux-hardening@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, llvm@...ts.linux.dev
Subject: Re: [RFC PATCH 06/21] cfi: Switch to -fsanitize=kcfi

On Fri, Apr 29, 2022 at 01:36:29PM -0700, Sami Tolvanen wrote:

> +CC_FLAGS_CFI	:= -fsanitize=kcfi -fno-sanitize-blacklist

I'm somewhat surprised to see CFI is a sanitizer. It just doesn't seem
to fit in the line of {UB,KC,KA}SAN and friends.