ioctl SIOCDELST always return with error "no such process". Fix: Apply the following patch:
Responsible Changed From-To: freebsd-bugs->freebsd-net Over to maintainer(s).
Responsible Changed From-To: freebsd-net->cy Mine.
Fixed by r255332, the update from ipf 4.1.28 to 5.1.2. Checking the history of the upline code, darrenr updated this in r1.13 of ip_state.c here --> http://ipfilter.cvs.sourceforge.net/viewvc/ipfilter/ipfilter/ip_state.c?revision=1.13&view=markup.
Re-opening. I will patch stable/9 with the patch from upline.
batch change: For bugs that match the following - Status Is In progress AND - Untouched since 2018-01-01. AND - Affects Base System OR Documentation DO: Reset to open status. Note: I did a quick pass but if you are getting this email it might be worthwhile to double check to see if this bug ought to be closed.
stable/9 is no longer supported and was fixed by 5.1.2 update.