linux-kernel - Re: NonExecutable Bit in 32Bit

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: <4ac8254d0704242333g17972a7q2106015af946ea5@mail.gmail.com>
Date:	Wed, 25 Apr 2007 08:33:10 +0200
From:	"Tuncer Ayaz" <tuncer.ayaz@...il.com>
To:	"Cestonaro, Thilo (external)" 
	<Thilo.Cestonaro.external@...itsu-siemens.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: NonExecutable Bit in 32Bit

On 4/25/07, Cestonaro, Thilo (external)
<Thilo.Cestonaro.external@...itsu-siemens.com> wrote:
> Hey,
>
> > CONFIG_HIGHMEM64G=y
> > CONFIG_HIGHMEM=y
> > CONFIG_X86_PAE=y
>
> Ok in highmem it's active, whats about lowmem?
> x86-64 is NX active for lowmem too AFAIK.

It's more of an issue of having PAE enabled.
Without PAE you are not able to use the the NX bit.
That's the way the CPU works, not Linux.

Hope this helps.
-
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/