Re: [kernel-hardening] Re: [RFC] x86: restrict pid namespaces to32 or 64 bit syscalls

[Vasiliy Kulikov]

On Sat, Aug 13, 2011 at 10:41 -0500, H. Peter Anvin wrote:
> IA64 is totally different.

I didn't say all IA-32 compatibility layer of x86 is a crap, surely no.
But there is some code, which is poorly tested exactly because it is
compatibility code.  One relatively recent example:

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=3e645d6b485446c54c6745c5e2cf5c528fe4deec

>  I'm extremely sceptical to this patch;
> it feels like putting code in a super-hot path to paper over a problem that has to be fixed anyway.

I'll move the check to the tracesys branch, which is not a hot path, in
the next RFC version, so this should not be a problem.

Thanks,

-- 
Vasiliy Kulikov
http://www.openwall.com - bringing security into open computing environments
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/