[PATCH 4.4 065/342] bcache: fix a leak in bch_cached_dev_run()

From: Greg Kroah-Hartman
Date: Tue Mar 01 2016 - 20:14:40 EST


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

------------------

From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>

commit 4d4d8573a8451acc9f01cbea24b7e55f04a252fe upstream.

Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Tested-by: Joshua Schmid <jschmid@xxxxxxxx>
Tested-by: Eric Wheeler <bcache@xxxxxxxxxxxxxxxxxx>
Cc: Kent Overstreet <kmo@xxxxxxxxxxxxx>
Signed-off-by: Jens Axboe <axboe@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/md/bcache/super.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -849,8 +849,11 @@ void bch_cached_dev_run(struct cached_de
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) {