libdm: fix resource leak in dm_stats_set_alias()

When we fail to update aux_data the newly allocated group->alias must
be freed before reinstating old_alias.

1 files changed, 1 insertions, 0 deletions

diff --git a/libdm/libdm-stats.c b/libdm/libdm-stats.c
index e979b341c..d89f77ab4 100644
--- a/libdm/libdm-stats.c
+++ b/libdm/libdm-stats.c
@@ -3106,6 +3106,7 @@ int dm_stats_set_alias(struct dm_stats *dms, uint64_t group_id, const char *alia
 	return 1;
 
 bad:
+	dm_free((char *) group->alias);
 	group->alias = old_alias;
 	return 0;
 }