RE: Non-Exec stack patches

[Siddha, Suresh B]

> -----Original Message-----
> From: linux-kernel-owner@xxxxxxxxxxxxxxx
> [mailto:linux-kernel-owner@xxxxxxxxxxxxxxx]On Behalf Of Andrew Morton
> Sent: Tuesday, March 23, 2004 4:41 PM
> To: Kurt Garloff
> Cc: linux-kernel@xxxxxxxxxxxxxxx; mingo@xxxxxxxxxx
> Subject: Re: Non-Exec stack patches
> 
> 
> Kurt Garloff <garloff@xxxxxxx> wrote:
> >
> > > Which architectures are currently making their pre-page 
> execute permissions
> > > depend upon VM_EXEC?  Would additional arch patches be 
> needed for this?
> > 
> > It works on AMD64 (not ia32e), both for 64bit and 32bit binaries.
> > I have not yet tested other archs.
> > 
> > If the values in the protection_map are different depending 
> on bit 2,
> > the patch will be effecitve. (OK, the CPU/MMU needs to honour the
> > setting of course.) Most likely, the values for 
> > protection_map[7] is PAGE_COPY_EXEC and of protection_map[3] is
> > PAGE_COPY.
> 
> OK.
> 

Recent ia64 mm trees are broken because of this issue. Attached patch fixes protection_map[7] in IA64.

thanks,
suresh

Attachment: noexec-ia64.fix
Description: noexec-ia64.fix