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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>
This commit is contained in:
Wladimir J. van der Laan 2017-07-25 14:33:36 +02:00 committed by Lucas Stach
parent 5669b9989e
commit d6f756e09f
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
View File

@ -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;
}