Btrfs: async-thread: fix possible memory leak

When kthread_run() returns failure, this worker hasn't been
added to the list, so btrfs_stop_workers() won't free it.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/fs/btrfs/async-thread.c b/fs/btrfs/async-thread.c
index 8d4cc4679d51ca8471f0086416aecc0474e3cd65..5fe6a0d532ed46a353b663ce4a13692313522399 100644 (file)
--- a/fs/btrfs/async-thread.c
+++ b/fs/btrfs/async-thread.c
@@ -187,6 +187,7 @@ int btrfs_start_workers(struct btrfs_workers *workers, int num_workers)
                worker->task = kthread_run(worker_loop, worker, "btrfs");
                worker->workers = workers;
                if (IS_ERR(worker->task)) {
+                       kfree(worker);
                        ret = PTR_ERR(worker->task);
                        goto fail;
                }