linux-kernel - Re: [PATCH 1/1] x86_64: fix KASan shadow region page tables

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-id: <5562D989.3030206@samsung.com>
Date:	Mon, 25 May 2015 11:12:57 +0300
From:	Andrey Ryabinin <a.ryabinin@...sung.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>,
	Denys Vlasenko <dvlasenk@...hat.com>,
	Andy Lutomirski <luto@...capital.net>,
	Alexander Kuleshov <kuleshovmail@...il.com>,
	Sergey Kovalev <SKovalev@...ecurity.com>, x86@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/1] x86_64: fix KASan shadow region page tables

On 05/22/2015 07:03 PM, Alexander Popov wrote:
> Physical addresses in KASan shadow region page tables need fixup:
> kernel halts without it if phys_base is not zero.
> 

Indeed.
Since we have to patch page tables anyway, compile-time created kasan
page tables become pointless.
So, I'd suggest to create them in runtime. This could be done in plain C
in kasan_map_early_shadow().


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/