From 25d7cd6faa7ae6ed2565617c3ee2500ccb8a9f7f Mon Sep 17 00:00:00 2001
From: Mike Snitzer <snitzer@redhat.com>
Date: Tue, 3 Jul 2012 12:55:33 +0100
Subject: [PATCH] dm persistent data: fix shadow_info_leak on dm_tm_destroy
Cleanup the shadow table before destroying the transaction manager.
Reference: leak was identified with kmemleak when running
test_discard_random_sectors in the thinp-test-suite.
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
---
drivers/md/persistent-data/dm-transaction-manager.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/md/persistent-data/dm-transaction-manager.c b/drivers/md/persistent-data/dm-transaction-manager.c
index 400fe144c0cd1..02bf78e9d10d9 100644
--- a/drivers/md/persistent-data/dm-transaction-manager.c
+++ b/drivers/md/persistent-data/dm-transaction-manager.c
@@ -138,6 +138,9 @@ EXPORT_SYMBOL_GPL(dm_tm_create_non_blocking_clone);
void dm_tm_destroy(struct dm_transaction_manager *tm)
{
+ if (!tm->is_clone)
+ wipe_shadow_table(tm);
+
kfree(tm);
}
EXPORT_SYMBOL_GPL(dm_tm_destroy);