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Date: Fri, 5 Apr 2019 20:35:26 +0900
From: Masahiro Yamada <yamada.masahiro@...ionext.com>
To: Alexander Potapenko <glider@...gle.com>
Cc: James Morris <jmorris@...ei.org>, "Serge E. Hallyn" <serge@...lyn.com>,
linux-security-module@...r.kernel.org,
Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
Nick Desaulniers <ndesaulniers@...gle.com>, kcc@...gle.com,
Dmitry Vyukov <dvyukov@...gle.com>, Kees Cook <keescook@...omium.org>,
sspatil@...roid.com,
Kernel Hardening <kernel-hardening@...ts.openwall.com>
Subject: Re: [PATCH v2 2/2] initmem: introduce CONFIG_INIT_ALL_HEAP
On Fri, Mar 8, 2019 at 10:27 PM Alexander Potapenko <glider@...gle.com> wrote:
>
> diff --git a/security/Kconfig.initmem b/security/Kconfig.initmem
> index 27aec394365e..5ce49663777a 100644
> --- a/security/Kconfig.initmem
> +++ b/security/Kconfig.initmem
> @@ -13,6 +13,17 @@ config INIT_ALL_MEMORY
>
> if INIT_ALL_MEMORY
>
> +config INIT_ALL_HEAP
> + bool "Initialize all heap"
> + depends on INIT_ALL_MEMORY
> + select CONFIG_PAGE_POISONING
> + select CONFIG_PAGE_POISONING_NO_SANITY
> + select CONFIG_PAGE_POISONING_ZERO
> + select CONFIG_SLUB_DEBUG
This should like follows (no CONFIG_ prefix):
select PAGE_POISONING
select PAGE_POISONING_NO_SANITY
select PAGE_POISONING_ZERO
select SLUB_DEBUG
But, again, this causes unmet dependency if SLUB=n
> + default y
> + help
> + Enable page poisoning and slub poisoning by default.
> +
> config INIT_ALL_STACK
> bool "Initialize all stack"
> depends on INIT_ALL_MEMORY
> --
> 2.21.0.360.g471c308f928-goog
>
--
Best Regards
Masahiro Yamada
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