Re: [Xen-devel] [PATCH 1/3] Add support for OpenBSD

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 18/10/06 8:57 am, "Christoph Egger" <Christoph.Egger@xxxxxxx> wrote:

> On Thursday 19 October 2006 09:41, Keir Fraser wrote:
>> On 18/10/06 8:25 am, "Christoph Egger" <Christoph.Egger@xxxxxxx> wrote:
>>>> We have that already in arch/x86/Rules.mk. If that was working, I doubt
>>>> Christoph would have gone to the trouble of hacking up the SSP goop.
>>> 
>>> I did this work in August. There wasn't anything SSP-related there. So
>>> without SSP support, I got into linking errors.
>>> Now that the work is done, why shouldn't it go in?
>> 
>> Uncertainty about new compiler-assisted stuff that I don't believe will
>> catch any bugs in Xen. Linux guys have clearly reached the same conclusion.
>> Given we even turn off frame pointers in non-debug builds, is it likely
>> we'll take this? :-)
> 
> Linux guys also came to the conclusion, kernel debuggers are useless
> to catch any bugs. On the other side, how many use the kgdb patch?
> So, even if my SSP patch won't go in, how many will use it?
> Hmm... now I feel, this ends up in a debate on principles. :-)

I'll admit I don't really have any time for kernel debuggers either. :-)

We simply don't have arrays on the stack all that often, and particularly
not filled from untrusted sources with untrusted limits.

 -- Keir



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