drm/etnaviv: Fix off-by-one error in reloc checking

A relocation pointing to the last four bytes of a buffer can
legitimately happen in the case of small vertex buffers.

CC: stable@vger.kernel.org #4.9+
Signed-off-by: Wladimir J. van der Laan <laanwj@gmail.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
index 5bd9316..6463fc2 100644 (file)
--- a/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
@@ -270,8 +270,8 @@ static int submit_reloc(struct etnaviv_gem_submit *submit, void *stream,
                if (ret)
                        return ret;
 
-               if (r->reloc_offset >= bo->obj->base.size - sizeof(*ptr)) {
-                       DRM_ERROR("relocation %u outside object", i);
+               if (r->reloc_offset > bo->obj->base.size - sizeof(*ptr)) {
+                       DRM_ERROR("relocation %u outside object\n", i);
                        return -EINVAL;
                }