On Wed, 26 Aug 2020 at 13:50, Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> wrote: > > 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). > But that code uses a hash not an aead, afaict. > 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
