linux-kernel - Re: [PATCH v2] x86: remove NX from video bios area

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: <4EC520AE.3070409@zytor.com>
Date:	Thu, 17 Nov 2011 06:56:46 -0800
From:	"H. Peter Anvin" <hpa@...or.com>
To:	wangyanqing <Udknight@...il.com>, torvalds@...ux-foundation.org,
	castet.matthieu@...e.fr, akpm@...ux-foundation.org, x86@...nel.org,
	spock@...too.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] x86: remove NX from video bios area

On 11/17/2011 12:26 AM, wangyanqing wrote:
>  
> +/*we hope this the right video bios range*/
> +#define VIDEO_BIOS_BEGIN	0x000c0000
> +#define VIDEO_BIOS_END		0x000c7fff
> +
>  #define BIOS_ROM_BASE		0xffe00000
>  #define BIOS_ROM_END		0xffffffff

Ick.  This feels increasingly hacky, especially since the above is known
to not be the video BIOS range on a lot of reasons.

There is something much more fundamentally wrong here, including why X
permission is needed for uvesafb at all.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

--
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/