From: Dan Carpenter Date: Tue, 3 Jul 2018 15:30:16 +0300 Subject: drm/i810: off by one in i810_dma_vertex() Git-commit: a1de8d0a7e2cc79dad6d469901b3b5d4c94c4554 Patch-mainline: v4.19-rc1 References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166 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 Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20180703123015.kma7v7rwtdy4urce@kili.mountain Acked-by: Petr Tesarik --- drivers/gpu/drm/i810/i810_dma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- 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_de 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,