Btrfs: fix memory leak in start_transaction()

Free btrfs_trans_handle when join_transaction() fails
in start_transaction()

Signed-off-by: Yoshinori Sano <yoshinori.sano@gmail.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index ce48eb59d6156dd72b8cfe4344e50411abe47d98..d01cc249a8d36188986fa70b073b054c550cf937 100644 (file)
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -197,6 +197,7 @@ again:
 
        ret = join_transaction(root);
        if (ret < 0) {
+               kmem_cache_free(btrfs_trans_handle_cachep, h);
                if (type != TRANS_JOIN_NOLOCK)
                        mutex_unlock(&root->fs_info->trans_mutex);
                return ERR_PTR(ret);