diff --git a/mm/cma_debug.c b/mm/cma_debug.c
index 2e7704955f4f3..c3ffe253e0552 100644
--- a/mm/cma_debug.c
+++ b/mm/cma_debug.c
@@ -163,7 +163,7 @@ DEFINE_DEBUGFS_ATTRIBUTE(cma_alloc_fops, NULL, cma_alloc_write, "%llu\n");
 static void cma_debugfs_add_one(struct cma *cma, struct dentry *root_dentry)
 {
 	struct dentry *tmp;
-	char name[16];
+	char name[CMA_MAX_NAME];
 
 	scnprintf(name, sizeof(name), "cma-%s", cma->name);