From: Nick Piggin <npiggin@kernel.dk>
Date: Fri, 14 Jan 2011 02:48:39 +0000 (+0000)
Subject: nfs: add missing rcu-walk check
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=657e94b673a805b427903c5628e95348235fad06;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

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 d33da530097a..a0d8320bed9c 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1410,11 +1410,15 @@ no_open:
 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;