K 10
svn:author
V 3
jhb
K 8
svn:date
V 27
2007-01-05T19:59:46.000000Z
K 7
svn:log
V 914
- Close a race between enumerating UNIX domain socket pcb structures via
  sysctl and socket teardown by adding a reference count to the UNIX domain
  pcb object and fixing the sysctl that enumerates unpcbs to grab a
  reference on each unpcb while it builds the list to copy out to userland.
- Close a race between UNIX domain pcb garbage collection (unp_gc()) and
  file descriptor teardown (fdrop()) by adding a new garbage collection
  flag FWAIT.  unp_gc() sets FWAIT while it walks the message buffers
  in a UNIX domain socket looking for nested file descriptor references
  and clears the flag when it is finished.  fdrop() checks to see if the
  flag is set on a file descriptor whose refcount just dropped to 0 and
  waits for unp_gc() to clear the flag before completely destroying the
  file descriptor.

MFC after:	1 week
Reviewed by:	rwatson
Submitted by:	ups
Hopefully makes the panics go away:	mx1

END