linux-kernel - Re: [PATCH 2/2] x86/kasan: write protect kasan zero shadow

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Message-ID: <CALCETrV7un=EBF8HZLdbuB6qoyKfSRz_O1DbNugqytJNWvoV7g@mail.gmail.com>
Date:	Mon, 18 Jan 2016 14:24:32 -0800
From:	Andy Lutomirski <luto@...capital.net>
To:	Andrey Ryabinin <aryabinin@...tuozzo.com>
Cc:	Borislav Petkov <bp@...en8.de>, Andy Lutomirski <luto@...nel.org>,
	X86 ML <x86@...nel.org>, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, Brian Gerst <brgerst@...il.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Oleg Nesterov <oleg@...hat.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/2] x86/kasan: write protect kasan zero shadow

On Mon, Jan 11, 2016 at 4:51 AM, Andrey Ryabinin
<aryabinin@...tuozzo.com> wrote:
> After kasan_init() executed, no one is allowed to write to kasan_zero_page,
> so write protect it.

This seems to work for me.

--Andy