NFSv4: fix server_scope memory leak

commit abe9a6d57b4544ac208401f9c0a4262814db2be4 upstream.

server_scope would never be freed if nfs4_check_cl_exchange_flags() returned
non-zero

Signed-off-by: Weston Andros Adamson <dros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 2ee398a..e527030 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -4876,8 +4876,10 @@ int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
                                clp->cl_rpcclient->cl_auth->au_flavor);
 
        res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
-       if (unlikely(!res.server_scope))
-               return -ENOMEM;
+       if (unlikely(!res.server_scope)) {
+               status = -ENOMEM;
+               goto out;
+       }
 
        status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
        if (!status)
@@ -4894,12 +4896,13 @@ int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
                        clp->server_scope = NULL;
                }
 
-               if (!clp->server_scope)
+               if (!clp->server_scope) {
                        clp->server_scope = res.server_scope;
-               else
-                       kfree(res.server_scope);
+                       goto out;
+               }
        }
-
+       kfree(res.server_scope);
+out:
        dprintk("<-- %s status= %d\n", __func__, status);
        return status;
 }