Re: [Dri-devel] Segfault in DRI Xserver extension

[Keith Whitwell]

Felix Kühling wrote:

Hi,

while I was messing around with my query programme I found this: if I
specify an invalid screen as argument to XF86DRIGetClientDriverName the
Xserver segfaults. I had a quick look at xc/xc/Xserver/GL/dri/xf86dri.c.
stuff->screen is used as array index without checking. I'm not sure
though, where would be the right place to fix it.

Other functions in xf86dri.c must be affacted, too. They use
stuff->screen in the same way.

Those functions should validate any information they receive over the wire, as soon as is feasible.

Keith




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