From: Michal Kubecek <[email protected]> Date: Thu, 30 May 2019 10:27:22 +0200
> I believe this should be handled by ethtool_get_regs(), either by > returning an error or by only copying data up to original regs.len > passed by userspace. The former seems more correct but broken userspace > software would suddenly start to fail where it "used to work". The > latter would be closer to current behaviour but it would mean that > broken userspace software might nerver notice there is something wrong. I therefore think we need to meticulously fixup all of these adjustments of regs.len before adjusting the copy call here in generic ethtool.
