diff --git a/mm/cma_debug.c b/mm/cma_debug.c
index 595b757bef72722fb2715afd9ab0cd1536181c9e..c03ccbc405a066038619361cf995f675dc2efaa1 100644
--- a/mm/cma_debug.c
+++ b/mm/cma_debug.c
@@ -167,7 +167,7 @@ static void cma_debugfs_add_one(struct cma *cma, int idx)
 	char name[16];
 	int u32s;
 
-	sprintf(name, "cma-%s", cma->name);
+	scnprintf(name, sizeof(name), "cma-%s", cma->name);
 
 	tmp = debugfs_create_dir(name, cma_debugfs_root);