> I would have thought […]
That‘s a common misunderstanding how licenses work on HN. Often even worse: "MIT allows relicensing" (no it doesn‘t, and sub-licensing is something different).
Behold the full set of licenses and copyright notices that apply to the Linux kernel, scanned with FOSSology[1] and ScanCode[2], and curated by licensing professionals: https://raw.githubusercontent.com/Open-Source-Compliance/pac...
Yes, you need to supply all of those if you distribute the Linux kernel in binary form. No, most companies don‘t do that in practice. Yes, they are in breach of all those licenses. Yes, next kernel release there will be changes.
I‘ve long been procrastinating on writing a blog post about exactly that.