SUNRPC: Ensure that rpc_mkpipe returns a refcounted dentry

If not, we cannot guarantee that idmap->idmap_dentry, gss_auth->dentry and
clnt->cl_dentry are valid dentries.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index d78479782045..a6d7c332dd49 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -240,6 +240,7 @@ rpc_clone_client(struct rpc_clnt *clnt)
         new->cl_autobind = 0;
         new->cl_oneshot = 0;
         new->cl_dead = 0;
+        dget(new->cl_dentry);
         rpc_init_rtt(&new->cl_rtt_default, clnt->cl_xprt->timeout.to_initval);
         if (new->cl_auth)
                 atomic_inc(&new->cl_auth->au_count);
@@ -314,6 +315,8 @@ rpc_destroy_client(struct rpc_clnt *clnt)
         if (clnt->cl_server != clnt->cl_inline_name)
                 kfree(clnt->cl_server);
 out_free:
+        if (clnt->cl_dentry)
+                dput(clnt->cl_dentry);
         kfree(clnt);
         return 0;
 }