Re: [patch 1/2] x86,module: Detect VMX modules and disable Split-Lock-Detect

[Peter Zijlstra]

On Mon, Apr 06, 2020 at 08:18:47AM -0700, Christoph Hellwig wrote:
> On Mon, Apr 06, 2020 at 04:40:20PM +0200, Peter Zijlstra wrote:
> > It is absolutely bonkers, but at the same time we can extend this
> > infrastructure to scan for dubious code patterns we don't want to
> > support. Like for instance direct manipulation of CR4.
> 
> But that is not what this code does - it disables split lock detection.
> If it failed to load the module the whole thing would make a little
> more sense.

If this lives, it'll be to just to fail module loading. IIRC the same
was suggested elsewhere in the thread.