On Thu, Oct 04, 2018 at 09:40:23PM +0000, Singh, Brijesh wrote: > Boris Ostrovsky reported a memory leak with device passthrough when SME > is active. > > The VFIO driver uses iommu_iova_to_phys() to get the physical address for > an iova. This physical address is later passed into vfio_unmap_unpin() to > unpin the memory. The vfio_unmap_unpin() uses pfn_valid() before unpinning > the memory. The pfn_valid() check was failing because encryption mask was > part of the physical address returned. This resulted in the memory not > being unpinned and therefore leaked after the guest terminates. > > The memory encryption mask must be cleared from the physical address in > iommu_iova_to_phys(). Merged and on its way upstream, thanks Brijesh.
