diff -up advancecomp-1.15/lib/png.c.me advancecomp-1.15/lib/png.c

--- advancecomp-1.15/lib/png.c.me	2019-06-11 13:17:33.265490986 +0200

+++ advancecomp-1.15/lib/png.c	2019-06-11 13:21:50.655818111 +0200

@@ -656,6 +656,11 @@ adv_error adv_png_read_ihdr(

 	}

 	*pix_pixel = pixel;

+	if (width_align < width) {

+		error_unsupported_set("Invalid image size");

+		goto err;

+	}

+

 	if (data[10] != 0) { /* compression */

 		error_unsupported_set("Unsupported compression, %d instead of 0", (unsigned)data[10]);

 		goto err;