From: Murray McAllister <murray.mcallister@xxxxxxxxx>
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().
Cc: <stable@xxxxxxxxxxxxxxx>
Fixes: d80efd5cb3de ("drm/vmwgfx: Initial DX support")
Signed-off-by: Murray McAllister <murray.mcallister@xxxxxxxxx>
Reviewed-by: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
Signed-off-by: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
---
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 315f9efce765..b4c7553d2814 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c
@@ -2427,6 +2427,10 @@ 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)) {
+ VMW_DEBUG_USER("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);
--
2.20.1
