[PATCH] drm/i810: off by one in i810_dma_vertex()

If vertex->idx == dma->buf_count then we end up reading one element beyond the end of the dma->buflist[] array.

Signed-off-by: Dan Carpenter dan.carpenter@oracle.com

diff --git a/drivers/gpu/drm/i810/i810_dma.c b/drivers/gpu/drm/i810/i810_dma.c index 576a417690d4..3b378936f575 100644 --- a/drivers/gpu/drm/i810/i810_dma.c +++ b/drivers/gpu/drm/i810/i810_dma.c @@ -934,7 +934,7 @@ static int i810_dma_vertex(struct drm_device *dev, void *data, DRM_DEBUG("idx %d used %d discard %d\n", vertex->idx, vertex->used, vertex->discard);

- if (vertex->idx < 0 || vertex->idx > dma->buf_count) + if (vertex->idx < 0 || vertex->idx >= dma->buf_count) return -EINVAL;

i810_dma_dispatch_vertex(dev,