diff --git a/drivers/nvmem/brcm_nvram.c b/drivers/nvmem/brcm_nvram.c
index aaa6537798bf..c3b4282aa164 100644
--- a/drivers/nvmem/brcm_nvram.c
+++ b/drivers/nvmem/brcm_nvram.c
@@ -84,6 +84,11 @@ static int brcm_nvram_copy_data(struct brcm_nvram *priv, struct platform_device
 	}
 	WARN(priv->data_len > SZ_128K, "Unexpected (big) NVRAM size: %zu B\n", priv->data_len);
 
+	if (priv->data_len < sizeof(struct brcm_nvram_header)) {
+		dev_err(priv->dev, "NVRAM data too small (%zu)\n", priv->data_len);
+		return -EINVAL;
+	}
+
 	priv->data = devm_kzalloc(priv->dev, priv->data_len, GFP_KERNEL);
 	if (!priv->data)
 		return -ENOMEM;