K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2016-10-28T11:34:32.327784Z
K 7
svn:log
V 576
Ensure that cluster allocations never allocate clusters outside the
volume limits.  In particular:
- Assert that usemap_alloc() and usemap_free() cluster number argument
  is valid.
- In chainlength(), return 0 if cluster start is after the max cluster.
- In chainlength(), cut the calculated cluster chain length at the max
  cluster.
- For true paranoia, after the pm_inusemap is calculated in
  fillinusemap(), reset all bits in the array for clusters after the
  max cluster, as in-use.

Reported and tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks

END