On (01/27/17 19:19), Willem de Bruijn wrote: > > other than ax25, are there variable length header protocols out there > > without ->validate, and which need the CAP_RAW_SYSIO branch? > > I don't know. An exhaustive search of protocols (by header_ops) may be > needed to say for sure. > > If there are none, then the solution indeed is quite simple.
I tried to start that exhaustive search, and it can be quite daunting: if you are doing this by just code-inspection, it's easy to get it wrong.. I havent quite given up yet, but it may be simpler to have the drivers support some defensive code against bogus skb's in the Tx path (the drivers will know, for sure, what's the min non-paged len they need anyway). --Sowmini
