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ceph: fix d_revalidate oopsen on NFS exports
Al Viro [Thu, 10 Mar 2011 08:44:05 +0000 (
03:44
-0500)]
can't blindly check nd->flags in ->d_revalidate()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
fs/ceph/dir.c
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diff --git
a/fs/ceph/dir.c
b/fs/ceph/dir.c
index
099a586
..
ebafa65
100644
(file)
--- a/
fs/ceph/dir.c
+++ b/
fs/ceph/dir.c
@@
-993,7
+993,7
@@
static int ceph_d_revalidate(struct dentry *dentry, struct nameidata *nd)
{
struct inode *dir;
- if (nd->flags & LOOKUP_RCU)
+ if (nd && nd->flags & LOOKUP_RCU)
return -ECHILD;
dir = dentry->d_parent->d_inode;