Don't try to configure a BAR if there is no region associated with it.
Signed-off-by: Alexandru Elisei <alexandru.elisei@xxxxxxx>
---
vfio/pci.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/vfio/pci.c b/vfio/pci.c
index 1f38f90c3ae9..f86a7d9b7032 100644
--- a/vfio/pci.c
+++ b/vfio/pci.c
@@ -652,6 +652,8 @@ static int vfio_pci_fixup_cfg_space(struct vfio_device *vdev)
/* Initialise the BARs */
for (i = VFIO_PCI_BAR0_REGION_INDEX; i <= VFIO_PCI_BAR5_REGION_INDEX; ++i) {
+ if ((u32)i == vdev->info.num_regions)
+ break;
u64 base;
struct vfio_region *region = &vdev->regions[i];
@@ -853,11 +855,12 @@ static int vfio_pci_configure_bar(struct kvm *kvm, struct vfio_device *vdev,
u32 bar;
size_t map_size;
struct vfio_pci_device *pdev = &vdev->pci;
- struct vfio_region *region = &vdev->regions[nr];
+ struct vfio_region *region;
if (nr >= vdev->info.num_regions)
return 0;
+ region = &vdev->regions[nr];
bar = pdev->hdr.bar[nr];
region->vdev = vdev;
--
2.20.1
