if_ef rotten

When trying to kldload if_ef (on yesterday CURRENT/amd64, with WITNESS
and almost all debugging enabled), I got a lot of
"malloc(M_WAITOK) of "XXX", forcing M_NOWAIT with the following non-sleepable
locks held:
 ... ifnet ..."

Is it rotten ? (No, I do not use it, just noted it when doing some other
testing work).