U-Boot boot.scr.cmd developer warning

[coloradocarlos]

The ST meta layers and Octavo SDK’s ship with a boot.scr.cmd with an interesting warning to the developer:

https://github.com/octavosystems/osd32mp1-build-tools/blob/master/files/ssbl/boot.scr.cmd

#########################################################################
# SAMPLE BOOT SCRIPT: PLEASE DON'T USE this SCRIPT in REAL PRODUCT
#########################################################################
# this script is only a OpenSTLinux helper to manage multiple target with the
# same bootfs, for real product with only one supported configuration change the
# bootcmd in U-boot or use the normal path for extlinux.conf to use DISTRO
# boocmd (generic distibution); U-Boot searches with boot_prefixes="/ /boot/":
# - /extlinux/extlinux.conf
# - /boot/extlinux/extlinux.conf
#########################################################################

I have reviewed the script and of course it runs correctly from a Yocto dunfell build. The configuration changes don’t make any sense and am ready to disregard the warning. I assume the message is for U-Boot loaders that support multiple boards such as “osd32mp1-red” and “osd32mp1-brk” where the board / target is set dynamically. What is ST asking for us to change?

[Neeraj Dantu]

Carlos,

I think the warning is more about security rather than functionality. The features in the script can be used to inject malicious code such as a device tree overlay that should not be applied on a production level product. The suggestion is to use hard coded paths in u-boot bootcmd to setup boot.

Best,
Neeraj

[Author]

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