bcache: fix a leak in bch_cached_dev_run()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Tested-by: Joshua Schmid <jschmid@suse.com>
Tested-by: Eric Wheeler <bcache@linux.ewheeler.net>
Cc: Kent Overstreet <kmo@daterainc.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jens Axboe <axboe@fb.com>

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 383f06028a0a93cadb7fcd7df539f70274679095..43e911e4e8d07380e98ad9d6ebb221bae58c1667 100644 (file)
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -849,8 +849,11 @@ 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) {