diff --git a/include/spdk/vfio_user_spec.h b/include/spdk/vfio_user_spec.h
index 1da127b98..9c2ee4bef 100644
--- a/include/spdk/vfio_user_spec.h
+++ b/include/spdk/vfio_user_spec.h
@@ -50,6 +50,7 @@ enum vfio_user_command {
 	VFIO_USER_DMA_WRITE			= 11,
 	VFIO_USER_VM_INTERRUPT			= 12,
 	VFIO_USER_DEVICE_RESET			= 13,
+	VFIO_USER_DIRTY_PAGES			= 14,
 	VFIO_USER_MAX,
 };
 
@@ -107,7 +108,7 @@ struct vfio_user_region_access {
 
 struct vfio_user_dma_region_access {
 	uint64_t    addr;
-	uint32_t    count;
+	uint64_t    count;
 	uint8_t     data[];
 } __attribute__((packed));
 
diff --git a/lib/vfio_user/vfio_user.c b/lib/vfio_user/vfio_user.c
index 53f297001..eed6c1576 100644
--- a/lib/vfio_user/vfio_user.c
+++ b/lib/vfio_user/vfio_user.c
@@ -296,7 +296,7 @@ vfio_user_get_dev_info(struct vfio_device *dev, struct vfio_user_device_info *de
 int
 vfio_user_dev_dma_map_unmap(struct vfio_device *dev, struct vfio_memory_region *mr, bool map)
 {
-	struct vfio_user_dma_region region;
+	struct vfio_user_dma_region region = { 0 };
 
 	region.addr = mr->iova;
 	region.size = mr->size;
diff --git a/libvfio-user b/libvfio-user
index 702a4cad4..cfe990191 160000
--- a/libvfio-user
+++ b/libvfio-user
@@ -1 +1 @@
-Subproject commit 702a4cad49c40406ff498e0da4a80c6d07b4fc83
+Subproject commit cfe9901919943f14961e1da1c4a823336ff79555