From: Mike Snitzer <snitzer@redhat.com>
Date: Tue, 3 Jul 2012 11:55:33 +0000 (+0100)
Subject: dm persistent data: fix shadow_info_leak on dm_tm_destroy
X-Git-Tag: Ubuntu-5.2.0-15.16~17714^2~3
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=25d7cd6faa7ae6ed2565617c3ee2500ccb8a9f7f;p=mirror_ubuntu-eoan-kernel.git

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>
---

diff --git a/drivers/md/persistent-data/dm-transaction-manager.c b/drivers/md/persistent-data/dm-transaction-manager.c
index 400fe144c0cd..02bf78e9d10d 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);