dm space map common: zero entire ll_disk

Otherwise, memory that is allocated (and potentially not previously zeroed) will get written to disk as part of the space maps. Signed-off-by: Mike Snitzer <snitzer@redhat.com>
mariux64 · Apr 18, 2019 · c6e086e · c6e086e
1 parent 84420b1
commit c6e086e
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/drivers/md/persistent-data/dm-space-map-common.c b/drivers/md/persistent-data/dm-space-map-common.c
@@ -190,6 +190,8 @@ static int sm_find_free(void *addr, unsigned begin, unsigned end,
 
 static int sm_ll_init(struct ll_disk *ll, struct dm_transaction_manager *tm)
 {
+	memset(ll, 0, sizeof(struct ll_disk));
+
 	ll->tm = tm;
 
 	ll->bitmap_info.tm = tm;