linux-hardening - Re: [RFC PATCH 00/21] KCFI support

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Message-ID: <CABCJKuced3-MoZoBdpL+=h1PC32C-5C12HZH96+dfEp43dJwaQ@mail.gmail.com>
Date:   Thu, 5 May 2022 09:00:39 -0700
From:   Sami Tolvanen <samitolvanen@...gle.com>
To:     Mark Rutland <mark.rutland@....com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Kees Cook <keescook@...omium.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>, X86 ML <x86@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        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 <linux-arm-kernel@...ts.infradead.org>,
        llvm@...ts.linux.dev
Subject: Re: [RFC PATCH 00/21] KCFI support

On Thu, May 5, 2022 at 5:36 AM Mark Rutland <mark.rutland@....com> wrote:
> FWIW, a `-DLLVM_ENABLE_ASSERTIONS=ON` build also seems to work for me when
> building a kernel with CONFIG_CFI_CLANG=y. It's much slower than a regular
> Release build, so I'm still waiting for that to finish building a kernel, but
> it has gotten much further through the build without issues.

Thanks for confirming. This issue should be fixed here if you want to
give it another try:

https://github.com/samitolvanen/llvm-project/commits/kcfi

Sami