dm: virtio-gpu: fix uninitialized memory access

In virtio_gpu_cmd_create_blob() and virtio_gpu_cmd_resource_attach_
backing(), entries may be accessed before initialization. Fix it by
using calloc() to allocate it instead of malloc().

Tracked-On: #8439
Signed-off-by: Jiaqing Zhao <[email protected]>

Author: jiaqingz-dev

devicemodel/hw/pci/virtio/virtio_gpu.c

@@ -810,7 +810,7 @@ virtio_gpu_cmd_resource_attach_backing(struct virtio_gpu_command *cmd)
 
 		r2d->iov = iov;
 		r2d->iovcnt = req.nr_entries;
-		entries = malloc(req.nr_entries * sizeof(struct virtio_gpu_mem_entry));
+		entries = calloc(req.nr_entries, sizeof(struct virtio_gpu_mem_entry));
 		if (!entries) {
 			free(iov);
 			resp.type = VIRTIO_GPU_RESP_ERR_OUT_OF_MEMORY;
@@ -1256,7 +1256,7 @@ virtio_gpu_cmd_create_blob(struct virtio_gpu_command *cmd)
 	r2d->resource_id = req.resource_id;
 
 	if (req.nr_entries > 0) {
-		entries = malloc(req.nr_entries * sizeof(struct virtio_gpu_mem_entry));
+		entries = calloc(req.nr_entries, sizeof(struct virtio_gpu_mem_entry));
 		if (!entries) {
 			pr_err("%s : memory allocation for entries failed.\n", __func__);
 			free(r2d);