linux-kernel - Re: vm86 segfaults with NX bit

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Message-ID: <s5hk5ay9ym4.wl%tiwai@suse.de>
Date:	Thu, 20 Nov 2008 17:00:03 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: vm86 segfaults with NX bit

At Thu, 20 Nov 2008 15:58:08 +0000,
Alan Cox wrote:
> 
> > Also, when NX bit is reset for the first 1MB (or smaller) in
> > do_sys_vm86(), it also works as expected.  But I have little clue
> > where to restore the bit again.
> > 
> > Any good suggestions / solutions?
> 
> Does it behave if you clear NX just for  640K-1MB, and page 0 ?

Yes.


Takashi
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