A few months ago in the Lubuntu project, due to a variety of issues with
installer images, I investigated using dm-verity to detect errors:
"Make checksum verification automatic"
I went further to investigate using Forward Error Correction (FEC) to
actually correct for minor errors but current kernel config prevents that:
"dm-verity: Invalid number of feature arg" with FEC due to "#
CONFIG_DM_VERITY_FEC is not set"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1838844
That bug also details the steps for creating the verity hashes.
My experiments indicate that adopting dm-verity, especially in
conjunction with FEC, could avoid a large range of installer bug reports
and support requests we see constantly in IRC #ubuntu due to data
corruption.
The aim would be:
1. Enable FEC in kernel
2. Adapt live-build to create the verity images
3. Create userspace alerts package
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