1 files changed, 3 insertions, 1 deletions

diff --git a/fs/dcache.c b/fs/dcache.c
index be2bea834bf4..e99c6f529ba8 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -532,10 +532,12 @@ static inline struct dentry *lock_parent(struct dentry *dentry)
         struct dentry *parent = dentry->d_parent;
         if (IS_ROOT(dentry))
                 return NULL;
+        if (unlikely((int)dentry->d_lockref.count < 0))
+                return NULL;
         if (likely(spin_trylock(&parent->d_lock)))
                 return parent;
-        spin_unlock(&dentry->d_lock);
         rcu_read_lock();
+        spin_unlock(&dentry->d_lock);
 again:
         parent = ACCESS_ONCE(dentry->d_parent);
         spin_lock(&parent->d_lock);