There is a problem when rendering huge lines with the XRender pipeline, causing an infinite loop.

The Bresenham renderer in sun/java2d/xr/XRDrawLine.java overflows when calculating the clip coordinates, for example the following code (line 283):

xsteps = 2 * ysteps * ax + ay

Produces the following with the attached test case already during the first passage:

2 * 33535 * 34005 + 34005 = 2280749355

The issue seems to also be present when using the native Bresenham renderer, although I hadn't found a way to exploit this yet.

There is an old related bug describing the same issue but was marked as fixed, so this may be a regression, however the bug does not seem to have a commit in the OpenJDK code base so maybe it was fixed in the closed version only:

https://bugs.openjdk.java.net/browse/JDK-4376103

I can reproduce this problem on all the version I tried so far: 8u, 11u, 13 and latest-dev.