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Date: Mon, 14 Aug 2017 18:19:13 -0700 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, "Wladimir J. van der Laan" <laanwj@...il.com>, Philipp Zabel <p.zabel@...gutronix.de>, Christian Gmeiner <christian.gmeiner@...il.com>, Lucas Stach <l.stach@...gutronix.de> Subject: [PATCH 4.12 22/65] drm/etnaviv: Fix off-by-one error in reloc checking 4.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Wladimir J. van der Laan <laanwj@...il.com> commit d6f756e09f01ea7a0efbbcef269a1e384a35d824 upstream. A relocation pointing to the last four bytes of a buffer can legitimately happen in the case of small vertex buffers. Signed-off-by: Wladimir J. van der Laan <laanwj@...il.com> Reviewed-by: Philipp Zabel <p.zabel@...gutronix.de> Reviewed-by: Christian Gmeiner <christian.gmeiner@...il.com> Signed-off-by: Lucas Stach <l.stach@...gutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- 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_g 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; }
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