arm: imx: hab: Verify IVT self matches calculated address

The IVT is a self-describing structure which contains a self field. The
self field is the absolute physical base address the IVT ought to be at in
memory. Use the IVT self field to validate the calculated ivt_addr bugging
out if the two values differ.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Cc: Stefano Babic <sbabic@denx.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Albert Aribaud <albert.u.boot@aribaud.net>
Cc: Sven Ebenfeld <sven.ebenfeld@gmail.com>
Cc: George McCollister <george.mccollister@gmail.com>
Cc: Breno Matheus Lima <brenomatheus@gmail.com>
Tested-by: Breno Lima <breno.lima@nxp.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>

arch/arm/mach-imx/hab.c

@@ -450,6 +450,13 @@ int authenticate_image(uint32_t ddr_start, uint32_t image_size,
 	if (verify_ivt_header(ivt_hdr))
 		goto hab_caam_clock_disable;
 
+	/* Verify IVT body */
+	if (ivt->self != ivt_addr) {
+		printf("ivt->self 0x%08x pointer is 0x%08x\n",
+		       ivt->self, ivt_addr);
+		goto hab_caam_clock_disable;
+	}
+
 	start = ddr_start;
 	bytes = image_size;
 #ifdef DEBUG