When running a guest featuring a virtio-blk-pci protected with a virtual IOMMU we hit a NULL pointer dereference. This series removes the dma_max_mapping_size() call in virtio_max_dma_size when the device does not have any dma_mask set. A check is also added to early return in dma_addressing_limited() if the dma_mask is NULL. Eric Auger (2): dma-mapping: Protect dma_addressing_limited against NULL dma_mask virtio/virtio_ring: Fix the dma_max_mapping_size call drivers/virtio/virtio_ring.c | 2 +- include/linux/dma-mapping.h | 5 +++-- 2 files changed, 4 insertions(+), 3 deletions(-) -- 2.20.1 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
