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authorTyler Hicks <tyhicks@linux.vnet.ibm.com>2011-02-18 02:35:20 +0300
committerTyler Hicks <tyhicks@linux.vnet.ibm.com>2011-02-21 23:45:57 +0300
commit70b8902199003b098fde86d1db02e7465115a02c (patch)
treef0576b1a4df43be528e7cc44a36204090ad1994a /fs/ecryptfs/dentry.c
parent8787c7a3e0e3f1aa21856d6b6cd6880cc93497e9 (diff)
downloadlinux-70b8902199003b098fde86d1db02e7465115a02c.tar.xz
eCryptfs: Handle NULL nameidata pointers
Allow for NULL nameidata pointers in eCryptfs create, lookup, and d_revalidate functions. Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
Diffstat (limited to 'fs/ecryptfs/dentry.c')
-rw-r--r--fs/ecryptfs/dentry.c22
1 files changed, 13 insertions, 9 deletions
diff --git a/fs/ecryptfs/dentry.c b/fs/ecryptfs/dentry.c
index 6fc4f319b550..534c1d46e69e 100644
--- a/fs/ecryptfs/dentry.c
+++ b/fs/ecryptfs/dentry.c
@@ -46,24 +46,28 @@ static int ecryptfs_d_revalidate(struct dentry *dentry, struct nameidata *nd)
{
struct dentry *lower_dentry;
struct vfsmount *lower_mnt;
- struct dentry *dentry_save;
- struct vfsmount *vfsmount_save;
+ struct dentry *dentry_save = NULL;
+ struct vfsmount *vfsmount_save = NULL;
int rc = 1;
- if (nd->flags & LOOKUP_RCU)
+ if (nd && nd->flags & LOOKUP_RCU)
return -ECHILD;
lower_dentry = ecryptfs_dentry_to_lower(dentry);
lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry);
if (!lower_dentry->d_op || !lower_dentry->d_op->d_revalidate)
goto out;
- dentry_save = nd->path.dentry;
- vfsmount_save = nd->path.mnt;
- nd->path.dentry = lower_dentry;
- nd->path.mnt = lower_mnt;
+ if (nd) {
+ dentry_save = nd->path.dentry;
+ vfsmount_save = nd->path.mnt;
+ nd->path.dentry = lower_dentry;
+ nd->path.mnt = lower_mnt;
+ }
rc = lower_dentry->d_op->d_revalidate(lower_dentry, nd);
- nd->path.dentry = dentry_save;
- nd->path.mnt = vfsmount_save;
+ if (nd) {
+ nd->path.dentry = dentry_save;
+ nd->path.mnt = vfsmount_save;
+ }
if (dentry->d_inode) {
struct inode *lower_inode =
ecryptfs_inode_to_lower(dentry->d_inode);