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Bryn M. Reeves ebc7fc67c8 libdm: fix group resource leak in dm_stats_delete_region()
The function _stats_remove_region_id_from_group() incorecctly set
the group_id to DM_STATS_GROUP_NOT_PRESENT _before_ the call to
_stats_group_destroy(). This will cause the destroy function to
return immediately without doing anything:

 339 static void _stats_group_destroy(struct dm_stats_group *group)
 340 {
 341         if (!_stats_group_present(group))
 342                 return;

Invalidating the ID in _stats_region_region_id_from_group() is
redundant anyway; it is rightly done as the last operation in
_stats_group_destroy (and it is not possible for anything to see
the old value between the two calls).

Remove the change to group_id to ensure that the alias and bitset
resources are correctly freed.
2016-07-08 12:30:09 +01:00
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