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Date: Fri, 12 Dec 2014 06:14:25 +0000
From: Ben Hutchings <ben@...adent.org.uk>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC: akpm@...ux-foundation.org, "Mike Snitzer" <snitzer@...hat.com>,
"Alexey Khoroshilov" <khoroshilov@...ras.ru>,
"Jonathan Brassow" <jbrassow@...hat.com>
Subject: [PATCH 3.2 045/164] dm log userspace: fix memory leak in
dm_ulog_tfr_init failure path
3.2.65-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Alexey Khoroshilov <khoroshilov@...ras.ru>
commit 56ec16cb1e1ce46354de8511eef962a417c32c92 upstream.
If cn_add_callback() fails in dm_ulog_tfr_init(), it does not
deallocate prealloced memory but calls cn_del_callback().
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
Reviewed-by: Jonathan Brassow <jbrassow@...hat.com>
Signed-off-by: Mike Snitzer <snitzer@...hat.com>
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
drivers/md/dm-log-userspace-transfer.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/md/dm-log-userspace-transfer.c
+++ b/drivers/md/dm-log-userspace-transfer.c
@@ -272,7 +272,7 @@ int dm_ulog_tfr_init(void)
r = cn_add_callback(&ulog_cn_id, "dmlogusr", cn_ulog_callback);
if (r) {
- cn_del_callback(&ulog_cn_id);
+ kfree(prealloced_cn_msg);
return r;
}
--
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