Thanks for the report, I've been away for a while, thus the late response.
Please update to get this relevant fix and some other TCP fixes (if you
haven't yet):
releases/2.6.25.7/tcp-fix-skb-vs-fack_count-out-of-sync-condition.patch
...If you still get them afterwards, please do rereport (and include me
as recipient :-)). ...I know there are couple of cases still after that
fix where TCP invariant checks trigger but they've been rare enough to
evade any of my debugging attempts (2.6.22.17 won't warn you anyway when
it breaks an invariant though I already know a handful violations that
do occur with it too but there's just plain silence because I only later
on added those warning).
--
i.
--
