rpc_pipe: fix cleanup of dummy gssd directory when notification fails

Currently, it could leak dentry references in some cases. Make sure
we clean up properly.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 13 insertions, 1 deletions

diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 5d973b25b5b0..b18554898562 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -1369,6 +1369,18 @@ out:
         return pipe_dentry;
 }
 
+static void
+rpc_gssd_dummy_depopulate(struct dentry *pipe_dentry)
+{
+        struct dentry *clnt_dir = pipe_dentry->d_parent;
+        struct dentry *gssd_dir = clnt_dir->d_parent;
+
+        __rpc_rmpipe(clnt_dir->d_inode, pipe_dentry);
+        __rpc_depopulate(clnt_dir, gssd_dummy_info_file, 0, 1);
+        __rpc_depopulate(gssd_dir, gssd_dummy_clnt_dir, 0, 1);
+        dput(pipe_dentry);
+}
+
 static int
 rpc_fill_super(struct super_block *sb, void *data, int silent)
 {
@@ -1412,7 +1424,7 @@ rpc_fill_super(struct super_block *sb, void *data, int silent)
         return 0;
 
 err_depopulate:
-        dput(gssd_dentry);
+        rpc_gssd_dummy_depopulate(gssd_dentry);
         blocking_notifier_call_chain(&rpc_pipefs_notifier_list,
                                            RPC_PIPEFS_UMOUNT,
                                            sb);