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ProcDRI2GetBuffers() tries to validate a length field (count). There is an integer overflow in the validation. This can cause out of bound reads and memory corruption later on. Reported-by: Ilja Van Sprundel <ivansprundel@ioactive.com> Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net> Reviewed-by: Julien Cristau <jcristau@debian.org>