Re: Issue with iwd + Linux 5.8.3 + WPA Enterprise

[Herbert Xu]

On Wed, Aug 26, 2020 at 12:40:14PM +0200, Ard Biesheuvel wrote:
>
> It would be helpful if someone could explain for the non-mac80211
> enlightened readers how iwd's EAP-PEAPv0 + MSCHAPv2 support relies on
> the algif_aead socket interface, and which AEAD algorithms it uses. I
> assume this is part of libell?

I see the problem.  libell/ell/checksum.c doesn't clear the MSG_MORE
flag before doing the recv(2).

I was hoping nobody out there was doing this but obviously I've
been proven wrong.

So what I'm going to do is to specifically allow this case of
a string of sendmsg(2)'s with MSG_MORE folloed by a recvmsg(2)
in the same thread.  I'll add a WARN_ON_ONCE so user-space can
eventually be fixed.

Cheers,
-- 
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt