bcache: fix possible memory leak in bch_cached_dev_run()

memory malloced in bch_cached_dev_run() and should be freed before
leaving from the error handling cases, otherwise it will cause
memory leak.

Fixes: 0b13efecf5f2 ("bcache: add return value check to bch_cached_dev_run()")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: Coly Li <colyli@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 26e374fbf57c7873d626e3a84b052a7a8c9d2353..20ed838e9413bf532e47ee6e70f60c56b3499010 100644 (file)
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -931,6 +931,9 @@ int bch_cached_dev_run(struct cached_dev *dc)
        if (dc->io_disable) {
                pr_err("I/O disabled on cached dev %s",
                       dc->backing_dev_name);
+               kfree(env[1]);
+               kfree(env[2]);
+               kfree(buf);
                return -EIO;
        }