On Thu, 2020-02-13 at 11:21 +0000, Sergey Matyukevich wrote:
> >
> > > Sure, I can fix hostapd instead. Could you point me at some good
> > > starting point to look at ? Are there any user-space tools that
> > > started to use strict validation ?
> >
> > It's not really opt-in or not, it's entirely a kernel choice.
>
> I mean, I don't know what userspace is supposed to do in the case,
> when kernel is doing strict validation. So I was asking about any
> pointers to docs or userspace tools that already do netlink
> machinery appropriately.
Userspace is just supposed to create well-formed messages :-)
But ... it really is a kernel bug. The nl80211_policy is missing an
entry for NL80211_ATTR_STATUS_CODE, so for *strict* commands, it's
assumed to not be supported. Need to add something like
[NL80211_ATTR_STATUS_CODE] = { .type = NLA_U16, },
to the nl80211_policy, or perhaps with a range indicating that 0 isn't
valid or something.
johannes
