From: Kees Cook <keescook@chromium.org>
To: andy@kernel.org, Andrew Morton <akpm@linux-foundation.org>,
glider@google.com
Cc: Kees Cook <keescook@chromium.org>,
nathan@kernel.org, dvyukov@google.com, elver@google.com,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
kasan-dev@googlegroups.com, ndesaulniers@google.com
Subject: Re: [PATCH v2] string: use __builtin_memcpy() in strlcpy/strlcat
Date: Tue, 30 May 2023 16:10:46 -0700 [thread overview]
Message-ID: <168548824525.1351231.6995242566921339574.b4-ty@chromium.org> (raw)
In-Reply-To: <20230530083911.1104336-1-glider@google.com>
On Tue, 30 May 2023 10:39:11 +0200, Alexander Potapenko wrote:
> lib/string.c is built with -ffreestanding, which prevents the compiler
> from replacing certain functions with calls to their library versions.
>
> On the other hand, this also prevents Clang and GCC from instrumenting
> calls to memcpy() when building with KASAN, KCSAN or KMSAN:
> - KASAN normally replaces memcpy() with __asan_memcpy() with the
> additional cc-param,asan-kernel-mem-intrinsic-prefix=1;
> - KCSAN and KMSAN replace memcpy() with __tsan_memcpy() and
> __msan_memcpy() by default.
>
> [...]
Applied to for-next/hardening, thanks!
[1/1] string: use __builtin_memcpy() in strlcpy/strlcat
https://git.kernel.org/kees/c/cfe93c8c9a7a
--
Kees Cook
next prev parent reply other threads:[~2023-05-30 23:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-30 8:39 [PATCH v2] string: use __builtin_memcpy() in strlcpy/strlcat Alexander Potapenko
2023-05-30 8:40 ` Alexander Potapenko
2023-05-30 23:10 ` Kees Cook [this message]
2023-05-31 7:57 ` Alexander Potapenko
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