On Sat, 2019-05-11 at 18:01 +1200, Murray McAllister wrote:
> If SVGA_3D_CMD_DX_DEFINE_RENDERTARGET_VIEW is called with a surface
> ID of SVGA3D_INVALID_ID, the srf struct will remain NULL after
> vmw_cmd_res_check(), leading to a null pointer dereference in
> vmw_view_add().
>
> Signed-off-by: Murray McAllister <murray.mcallister@xxxxxxxxx>
Thanks, I'll add this to the next -fixes pull.
Thomas
> ---
> drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
> b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
> index 2ff7ba04d8c8..447afd086206 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
> @@ -2414,6 +2414,10 @@ static int vmw_cmd_dx_view_define(struct
> vmw_private *dev_priv,
> return -EINVAL;
>
> cmd = container_of(header, typeof(*cmd), header);
> + if (unlikely(cmd->sid == SVGA3D_INVALID_ID)) {
> + DRM_ERROR("Invalid surface id.\n");
> + return -EINVAL;
> + }
> ret = vmw_cmd_res_check(dev_priv, sw_context, vmw_res_surface,
> VMW_RES_DIRTY_NONE,
> user_surface_converter,
> &cmd->sid, &srf);
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