Pedantically, it's a Linux kernel copyright holder rather than a Linux kernel contributor.
Some portions of code have been lifted from other projects, and some portions of code have
been signed away to other organisations. But to the extent that I think it's unlikely that
anyone would sue, I agree. "Unlikely" probably isn't good enough for the large companies that
could be potential targets, though, and as a result it's a practical matter as well as a