[cairo-bugs] [Bug 90120] Image compositor can pass invalid coordinates to pixman_fill()

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Apr 20 16:41:33 PDT 2015


--- Comment #5 from Federico Mena-Quintero <federico at gnome.org> ---
(In reply to Chris Wilson from comment #4)
> I doubt that you have a (uint32_t)-2 tall surface, so there is a much
> earlier bug where this manages to evade clipping.

I've just made the gnome.org bug visible; it was marked as a security bug, but
it's not easily exploitable.

I'd love to fix the root cause (Cairo not dealing with big coordinates
correctly), but that's a much bigger problem than putting a safety valve. 
Pixman should do it, or at least document the fact that it doesn't.

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