NFSv4: Fix a potentially Oopsable condition in __nfs_idmap_unregister
Ensure that __nfs_idmap_unregister can be called twice without
consequences.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/idmap.c b/fs/nfs/idmap.c
index e9b0c59..8b7e94a 100644
--- a/fs/nfs/idmap.c
+++ b/fs/nfs/idmap.c
@@ -404,8 +404,10 @@
static void __nfs_idmap_unregister(struct rpc_pipe *pipe)
{
- if (pipe->dentry)
+ if (pipe->dentry) {
rpc_unlink(pipe->dentry);
+ pipe->dentry = NULL;
+ }
}
static int __nfs_idmap_register(struct dentry *dir,