K 10
svn:author
V 3
mjg
K 8
svn:date
V 27
2015-12-18T16:33:15.654208Z
K 7
svn:log
V 476
proc: fix a race which could result in dereference of bad p_pgrp pointer on fork

During fork p_starcopy - p_endcopy area of a process is populated with bcopy
with only proc lock held. Another forking thread can find such a process and
proceed to access p_pgrp included in said area.

Fix the problem by moving the field outside. It is being properly assigned
later.

Reviewed by:	kib
Diagnosed by:	kib
Tested by:	Fabian Keil <freebsd-listen fabiankeil.de>
MFC after:	10 days

END