On Sun, Jun 19, 2022 at 11:32:07PM -0700, Christoph Hellwig wrote: > > This helps because we now block io memory from ever getting into these > > call paths. I'm pretty sure this is a serious security bug, but would > > let the IBM folks remark as I don't know it all that well.. > > Prevent as in crash when trying to convert it to a page? That or when calling memcpy() on an IO memory PFN that the guest passed into the dma s/g list the ccw driver is processing. Jason
