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authorErez Zadok <ezk@cs.sunysb.edu>2009-12-05 21:17:09 -0500
committerTyler Hicks <tyhicks@linux.vnet.ibm.com>2010-01-19 22:35:59 -0600
commit0d132f7364694da8f7cafd49e2fc2721b73e96e4 (patch)
tree8603d76664307d039830796cc04a0e0363cf3b60
parente27759d7a333d1f25d628c4f7caf845c51be51c2 (diff)
ecryptfs: don't ignore return value from lock_rename
Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu> Cc: Dustin Kirkland <kirkland@canonical.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
-rw-r--r--fs/ecryptfs/inode.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index 5726d7adaf5..764dc777b26 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -614,6 +614,7 @@ ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry,
struct dentry *lower_new_dentry;
struct dentry *lower_old_dir_dentry;
struct dentry *lower_new_dir_dentry;
+ struct dentry *trap = NULL;
lower_old_dentry = ecryptfs_dentry_to_lower(old_dentry);
lower_new_dentry = ecryptfs_dentry_to_lower(new_dentry);
@@ -621,7 +622,17 @@ ecryptfs_rename(struct inode *old_dir, struct dentry *old_dentry,
dget(lower_new_dentry);
lower_old_dir_dentry = dget_parent(lower_old_dentry);
lower_new_dir_dentry = dget_parent(lower_new_dentry);
- lock_rename(lower_old_dir_dentry, lower_new_dir_dentry);
+ trap = lock_rename(lower_old_dir_dentry, lower_new_dir_dentry);
+ /* source should not be ancestor of target */
+ if (trap == lower_old_dentry) {
+ rc = -EINVAL;
+ goto out_lock;
+ }
+ /* target should not be ancestor of source */
+ if (trap == lower_new_dentry) {
+ rc = -ENOTEMPTY;
+ goto out_lock;
+ }
rc = vfs_rename(lower_old_dir_dentry->d_inode, lower_old_dentry,
lower_new_dir_dentry->d_inode, lower_new_dentry);
if (rc)