linux-kernel - [PATCH 3.12 029/116] bcache: fix a leak in bch_cached_dev

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Message-Id: <172690beba9309e5a9369f4b383cef6884cbc07c.1457082108.git.jslaby@suse.cz>
Date:	Fri,  4 Mar 2016 10:01:14 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Al Viro <viro@...IV.linux.org.uk>,
	Al Viro <viro@...iv.linux.org.uk>,
	Kent Overstreet <kmo@...erainc.com>, Jens Axboe <axboe@...com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 029/116] bcache: fix a leak in bch_cached_dev_run()

From: Al Viro <viro@...IV.linux.org.uk>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit 4d4d8573a8451acc9f01cbea24b7e55f04a252fe upstream.

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
Tested-by: Joshua Schmid <jschmid@...e.com>
Tested-by: Eric Wheeler <bcache@...ux.ewheeler.net>
Cc: Kent Overstreet <kmo@...erainc.com>
Signed-off-by: Jens Axboe <axboe@...com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/md/bcache/super.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index f5004c5c4b96..391e04160c3f 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -841,8 +841,11 @@ void bch_cached_dev_run(struct cached_dev *dc)
 	buf[SB_LABEL_SIZE] = '\0';
 	env[2] = kasprintf(GFP_KERNEL, "CACHED_LABEL=%s", buf);
 
-	if (atomic_xchg(&dc->running, 1))
+	if (atomic_xchg(&dc->running, 1)) {
+		kfree(env[1]);
+		kfree(env[2]);
 		return;
+	}
 
 	if (!d->c &&
 	    BDEV_STATE(&dc->sb) != BDEV_STATE_NONE) {
-- 
2.7.2