From 8c4037a09a5c2f15aae4c79860a31c8045bd4ee8 Mon Sep 17 00:00:00 2001 From: Utkarsh Gupta Date: Tue, 20 Feb 2018 01:19:23 +0000 Subject: [PATCH] imx: hab: Ensure the IVT DCD pointer is Null prior to calling HAB authenticate function. DCD commands should only be present in the initial boot image loaded by the SoC ROM. DCD should not be present in images that will be verified by software using HAB RVT authentication APIs. Newer versions of HAB will generate an error if a DCD pointer is present in an image being authenticated by calling the HAB RVT API. Older versions of HAB will process and run DCD if it is present, and this could lead to an incorrect authentication boot flow. It is highly recommended this check is in place to ensure additional HAB verified images do not include a DCD table. Signed-off-by: Utkarsh Gupta Signed-off-by: Breno Lima Reviewed-by: Fabio Estevam --- arch/arm/mach-imx/hab.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm/mach-imx/hab.c b/arch/arm/mach-imx/hab.c index 1e6b31da7a..ba6b31d490 100644 --- a/arch/arm/mach-imx/hab.c +++ b/arch/arm/mach-imx/hab.c @@ -516,6 +516,12 @@ int imx_hab_authenticate_image(uint32_t ddr_start, uint32_t image_size, goto hab_authentication_exit; } + /* Verify if IVT DCD pointer is NULL */ + if (ivt->dcd) { + puts("Error: DCD pointer must be NULL\n"); + goto hab_authentication_exit; + } + start = ddr_start; bytes = image_size; -- 2.25.1