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| author | Tyler Hicks <tyhicks@linux.vnet.ibm.com> | 2011-02-18 02:35:20 +0300 |
|---|---|---|
| committer | Tyler Hicks <tyhicks@linux.vnet.ibm.com> | 2011-02-21 23:45:57 +0300 |
| commit | 70b8902199003b098fde86d1db02e7465115a02c (patch) | |
| tree | f0576b1a4df43be528e7cc44a36204090ad1994a /fs/ecryptfs/dentry.c | |
| parent | 8787c7a3e0e3f1aa21856d6b6cd6880cc93497e9 (diff) | |
| download | linux-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.c | 22 |
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); |