Re: Integrating ProPolice/SSP into FreeBSD

On Fri, 26 May 2006, Jeremie Le Hen wrote:

> first sorry for cross-posting but I thought this patch might interest 
> -CURRENT users as well as people concerned by security.
>
> I wrote a patch that integrates ProPolice/SSP into FreeBSD, one step further 
> than it has been realized so far.

This looks very neat.

Could you remind me what, if any, ABI issues might exist?  I'm familiar with 
the ideas behind ProPolice, but not the implementation.  Can I use SSP-compied 
libraries with pre-SSP applications?  Can I use post-SSP applications with 
pre-SSP binaries?

At various points in the past, the issue of integrating stack protection 
techniques into the gcc code has come up.  Did this ever go anywhere?  Even 
Microsoft's compiler suite ships with statically compiled stack protection 
these days.  In the past we've avoided local compiler changes in order to make 
it easier to track the vendor and avoid losing local compiler changes when 
upgrading.

Robert N M Watson

>
> It is available here :
>    http://tataz.chchile.org/~tataz/FreeBSD/SSP/
>
> Everything is explained on the web page, but I will repeat some
> informations here.  The patchset is splitted in two parts to ease the
> review of the patch.  The -propolice patch is only the original
> ProPolice patch for GCC 3.4.4 applied on FreeBSD source tree.  The
> -freebsd patch contains the glue I have written to make things neat.
>
> The patch exists in both for CURRENT and RELENG_6.  Both introduce a
> new make.conf(5) (and src.conf(5)) knob to enable stack protection
> on a per Makefile basis.  It if of course possible to compile your
> world with it.  Please refer to the web page for more informations.
>
> The patch has been tested and works pretty well.  My laptop and my
> workstation at work are compiled with SSP : world, kernel and ports,
> including X.org.
>
> I hope you will enjoy it.
> Regards,
> -- 
> Jeremie Le Hen
> < jeremie at le-hen dot org >< ttz at chchile dot org >
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