drm/qxl: add missing access check for execbuffer ioctl
Reported-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
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Reported-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Dave Airlie <airlied@redhat.com>