K 10 svn:author V 7 glebius K 8 svn:date V 27 2012-08-28T12:19:14.306589Z K 7 svn:log V 309 Protection against race between pf_unlink_state() vs pf_unlink_state(). This may happen in a very rare case, when a forwarding thread creates a state, and encounters state with same key but with both sides in >= TCPS_FIN_WAIT_2. The old state is deleted then, and it can race with deletion by expiry thread. END