nfs: add missing rcu-walk check
Signed-off-by: Nick Piggin <npiggin@kernel.dk>
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index d33da53..a0d8320 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1410,11 +1410,15 @@
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;