linux-kernel - Re: [PATCH v5 2/2] x86_64: fix KASan shadow region page tables

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Message-ID: <CAPAsAGwFsUDGBp5UC2uwUATys=OUFjEQ=ykLJNqS-5jGa_692g@mail.gmail.com>
Date:	Fri, 12 Jun 2015 20:13:55 +0300
From:	Andrey Ryabinin <ryabinin.a.a@...il.com>
To:	Alexander Popov <alpopov@...ecurity.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrey Konovalov <adech.fo@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Andrey Ryabinin <a.ryabinin@...sung.com>,
	Andy Lutomirski <luto@...nel.org>,
	Alexander Kuleshov <kuleshovmail@...il.com>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Kees Cook <keescook@...omium.org>,
	"x86@...nel.org" <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 2/2] x86_64: fix KASan shadow region page tables

2015-06-09 12:42 GMT+03:00 Alexander Popov <alpopov@...ecurity.com>:
> Physical addresses in KASan shadow region page tables need fixup similarly
> to the other page tables. Current code doesn't do it which causes
> kernel halt if phys_base is not zero.
> So let's initialize KASan shadow region page tables in kasan_early_init()
> using __pa_nodebug() which considers phys_base.
>
> Signed-off-by: Alexander Popov <alpopov@...ecurity.com>

Acked-by: Andrey Ryabinin <a.ryabinin@...sung.com>
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