nfs: add missing rcu-walk check

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
mariux64 · Jan 14, 2011 · 657e94b · 657e94b
1 parent 2c67559
commit 657e94b
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
@@ -1410,11 +1410,15 @@ static struct dentry *nfs_atomic_lookup(struct inode *dir, struct dentry *dentry
 static int nfs_open_revalidate(struct dentry *dentry, struct nameidata *nd)
 {
 	struct dentry *parent = NULL;
-	struct inode *inode = dentry->d_inode;
+	struct inode *inode;
 	struct inode *dir;
 	struct nfs_open_context *ctx;
 	int openflags, ret = 0;
 
+	if (nd->flags & LOOKUP_RCU)
+		return -ECHILD;
+
+	inode = dentry->d_inode;
 	if (!is_atomic_open(nd) || d_mountpoint(dentry))
 		goto no_open;