diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index 05d7878dfad1..f4ce67ac8486 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -203,6 +203,10 @@ static int jffs2_parse_param(struct fs_context *fc, struct fs_parameter *param)
 		if (result.uint_32 > UINT_MAX / 1024)
 			return invalf(fc, "jffs2: rp_size unrepresentable");
 		opt = result.uint_32 * 1024;
+
+		if (!c->mtd)
+			return invalf(fc, "jiffs2: mtd device is NULL");
+
 		if (opt > c->mtd->size)
 			return invalf(fc, "jffs2: Too large reserve pool specified, max is %llu KB",
 				      c->mtd->size / 1024);