On Mon, Dec 01, 2025 at 04:43:26PM -0500, Stefan Hajnoczi wrote:

+	/*
+	 * Each reservation key takes 8 bytes and there is an 8-byte header
+	 * before the reservation key list. The total size must fit into the
+	 * 16-bit ALLOCATION LENGTH field.
+	 */
+	if (check_mul_overflow(num_keys, 8, &data_len) ||
+	    check_add_overflow(data_len, 8, &data_len) ||

Using data_len for the throw away key size is a little confusing,
but then again I guess compared to all the surrounding code that's
harmless :)

So:

Reviewed-by: Christoph Hellwig <hch@lst.de>