tree ec013b939d466fbd06d3c62a5a0de5ca9e5a3ae1
parent 5b564d80f8bc21094c0cd2b19b679d983aabcc29
author Joe Thornber <ejt@redhat.com> 1386946555 +0000
committer Mike Snitzer <snitzer@redhat.com> 1386962530 -0500

dm array: fix a reference counting bug in shadow_ablock

An old array block could have its reference count decremented below
zero when it is being replaced in the btree by a new array block.

The fix is to increment the old ablock's reference count just before
inserting a new ablock into the btree.

Signed-off-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org # 3.9+