From: Al Viro <viro@zeniv.linux.org.uk>
Date: Thu, 10 Mar 2011 08:44:31 +0000 (-0500)
Subject: fuse: fix d_revalidate oopsen on NFS exports
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=529c5f958f9e60abaa7407986034b17d17536bf2;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

fuse: fix d_revalidate oopsen on NFS exports

can't blindly check nd->flags in ->d_revalidate()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index 83543b5ff941..8bd0ef9286c3 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -158,7 +158,7 @@ static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
 {
 	struct inode *inode;
 
-	if (nd->flags & LOOKUP_RCU)
+	if (nd && nd->flags & LOOKUP_RCU)
 		return -ECHILD;
 
 	inode = entry->d_inode;