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, 2 insertions, 0 deletions

diff --git a/net/sunrpc/auth_gss/auth_gss.c b/net/sunrpc/auth_gss/auth_gss.c
index bb46efd92e57..900ef31f5a0e 100644
--- a/net/sunrpc/auth_gss/auth_gss.c
+++ b/net/sunrpc/auth_gss/auth_gss.c
@@ -721,6 +721,8 @@ gss_destroy(struct rpc_auth *auth)
 
         gss_auth = container_of(auth, struct gss_auth, rpc_auth);
         rpc_unlink(gss_auth->path);
+        dput(gss_auth->dentry);
+        gss_auth->dentry = NULL;
         gss_mech_put(gss_auth->mech);
 
         rpcauth_free_credcache(auth);