end;
 	}
 
+	/* The xdp_page_head structure takes up space in each page, limiting the
+         * size of the packet data; add the extra size to headroom here to make
+         * sure it's accounted in the length checks below, but not in the
+         * metadata size check above.
+         */
+        if (do_live)
+		headroom += sizeof(struct xdp_page_head);
+
 	max_linear_sz = PAGE_SIZE - headroom - tailroom;
 	linear_sz = min_t(u32, linear_sz, max_linear_sz);
 
-- 
2.51.0[PATCH 6.6 76/88] bpf, test_run: Subtract size of xdp_frame from allowed metadata sizeGreg Kroah-Hartman <gregkh@linuxfoundation.org> undefinedstable@vger.kernel.org undefined undefined undefined undefined undefined undefined undefined undefined‘?…šD