Created attachment 5033 [details]
adjustment of do_uboot_assemble_fitimage task to multiple UBOOT_CONFIG definitions

Possible issue in UBOOT_CONFIG interation in code located in uboot-sign.bbclass, task do_uboot_assemble_fitimage():

	unset i j k                              <------- possible issue
	for config in ${UBOOT_MACHINE}; do
		i=$(expr $i + 1);
                bberror "i = $i, config = ${config}"
		for type in ${UBOOT_CONFIG}; do
			j=$(expr $j + 1);
                        bberror "j = $j, type = ${type}"
			if [ $j -eq $i ]; then
				break;
			fi
		done

		for binary in ${UBOOT_BINARIES}; do
			k=$(expr $j + 1);        <------- possible issue
                        bberror "k = $k, binary = ${binary}"
			if [ $k -eq $i ]; then
				break;
			fi
		done

		cd ${B}/${config}
                bberror "uboot_assemble_fitimage ${type} ${binary}"
		uboot_assemble_fitimage_helper ${type} ${binary}
	done

For following definitions:
	UBOOT_CONFIG[conf_1] = "conf_1_defconfig,,u-boot.bin_1"
	UBOOT_CONFIG[conf_2] = "conf_2_defconfig,,u-boot.bin_2"

I get following log prints:
	i = 1, config = conf_1_defconfig
	j = 1, type = conf_1
	k = 2, binary = u-boot.bin_1
	k = 2, binary = u-boot.bin_2
	uboot_assemble_fitimage conf_1 u-boot.bin_2

	i = 2, config = conf_2_defconfig
	j = 2, type = conf_1
	k = 3, binary = u-boot.bin_1
	k = 3, binary = u-boot.bin_2
	uboot_assemble_fitimage conf_1 u-boot.bin_2

The correct binary file never gets hit ($k never equals $i) and the one from last iteration is passed do uboot_assemble_fitimage() function.

What's more, the $j is not reset after upper loop iteration, and while iterating over UBOOT_CONFIG the second time the condition $j -eq $i is true for the first entry (conf_1 in my example, whereas it should be conf_2).

With change in attacked diff file it is working for me correctly.