From: Al Viro <viro@zeniv.linux.org.uk>
Date: Thu, 10 Mar 2011 08:45:28 +0000 (-0500)
Subject: jfs: fix d_revalidate oopsen on NFS exports
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=8ce84eeb5b40da21f20174dd25891a8409534237;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

jfs: 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/jfs/namei.c b/fs/jfs/namei.c
index 81ead850ddb6..5a2b269428a6 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -1600,7 +1600,7 @@ out:
 
 static int jfs_ci_revalidate(struct dentry *dentry, struct nameidata *nd)
 {
-	if (nd->flags & LOOKUP_RCU)
+	if (nd && nd->flags & LOOKUP_RCU)
 		return -ECHILD;
 	/*
 	 * This is not negative dentry. Always valid.