libxdma: fix string overflow

set name length to 16 and use snprintf

XDMA/linux-kernel/libxdma/libxdma.c

@@ -3074,7 +3074,7 @@ static int engine_init(struct xdma_engine *engine, struct xdma_dev *xdev,
 
 	/* remember SG DMA direction */
 	engine->dir = dir;
-	sprintf(engine->name, "%d-%s%d-%s", xdev->idx,
+	snprintf(engine->name, sizeof(engine->name), "%d-%s%d-%s", xdev->idx,
 		(dir == DMA_TO_DEVICE) ? "H2C" : "C2H", channel,
 		engine->streaming ? "ST" : "MM");
 

XDMA/linux-kernel/libxdma/libxdma.h

@@ -475,7 +475,7 @@ struct xdma_request_cb {
 struct xdma_engine {
 	unsigned long magic;	/* structure ID for sanity checks */
 	struct xdma_dev *xdev;	/* parent device */
-	char name[5];		/* name of this engine */
+	char name[16];		/* name of this engine */
 	int version;		/* version of this engine */
 	//dev_t cdevno;		/* character device major:minor */
 	//struct cdev cdev;	/* character device (embedded struct) */