commit e7e11f995642 ("drm/vmwgfx: fix integer overflow in vmw_surface_define_ioctl()")
ensures that each req->mip_levels[i] <= DRM_VMW_MAX_MIP_LEVELS, It would be easy to
conclude that the sum of req->mip_levels[i] (i = 0, ..., DRM_VMW_MAX_SURFACE_FACES - 1)
is less than or equal to (DRM_VMW_MAX_SURFACE_FACES * DRM_VMW_MAX_MIP_LEVELS).
Signed-off-by: Zhen Lei <thunder.leizhen@xxxxxxxxxx>
---
drivers/gpu/drm/vmwgfx/vmwgfx_surface.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c b/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
index 05fa092..4520b1f 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_surface.c
@@ -719,8 +719,7 @@ int vmw_surface_define_ioctl(struct drm_device *dev, void *data,
num_sizes += req->mip_levels[i];
}
- if (num_sizes > DRM_VMW_MAX_SURFACE_FACES * DRM_VMW_MAX_MIP_LEVELS ||
- num_sizes == 0)
+ if (num_sizes == 0)
return -EINVAL;
size = vmw_user_surface_size + 128 +
--
2.5.0
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