From: Murray McAllister <[email protected]> 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: <[email protected]> Fixes: d80efd5cb3de ("drm/vmwgfx: Initial DX support") Signed-off-by: Murray McAllister <[email protected]> Reviewed-by: Thomas Hellstrom <[email protected]> Signed-off-by: Thomas Hellstrom <[email protected]> --- 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 _______________________________________________ dri-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/dri-devel
