[PATCH] xcursorgen: Fix null pointer dereference on very large images.

Submitted by Tobias Stoeckmann

Assigned to Xorg Project Team

Link to original bug (#107023)

Description

Created attachment 140313 Patch to fix the issue

If xcursorgen encounters a PNG file which is larger than 32767 pixels in width or height, a null pointer dereference occurs because the return value of XcursorImageCreate is not checked.

The largest possible value is 32767 for libXcursor, which is a hard coded limit due to a 16 bit integer used (0x7FFF).

Patch 140313, "Patch to fix the issue":
xcursorgen-null.patch

Version: git