diff options
| author | Tyler Hicks <tyhicks@linux.vnet.ibm.com> | 2010-09-23 02:35:04 -0500 |
|---|---|---|
| committer | Tyler Hicks <tyhicks@linux.vnet.ibm.com> | 2010-10-29 10:31:35 -0500 |
| commit | 2e21b3f124eceb6ab5a07c8a061adce14ac94e14 (patch) | |
| tree | 0997d7430d83a976b5e7ff0e2201032a45ccb759 | |
| parent | 48b512e6857139393cdfce26348c362b87537018 (diff) | |
eCryptfs: Clear LOOKUP_OPEN flag when creating lower file
eCryptfs was passing the LOOKUP_OPEN flag through to the lower file
system, even though ecryptfs_create() doesn't support the flag. A valid
filp for the lower filesystem could be returned in the nameidata if the
lower file system's create() function supported LOOKUP_OPEN, possibly
resulting in unencrypted writes to the lower file.
However, this is only a potential problem in filesystems (FUSE, NFS,
CIFS, CEPH, 9p) that eCryptfs isn't known to support today.
https://bugs.launchpad.net/ecryptfs/+bug/641703
Reported-by: Kevin Buhr
Cc: stable <stable@kernel.org>
Signed-off-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com>
| -rw-r--r-- | fs/ecryptfs/inode.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c index 63e6ec0e8b50..9d1a22d62765 100644 --- a/fs/ecryptfs/inode.c +++ b/fs/ecryptfs/inode.c @@ -71,15 +71,19 @@ ecryptfs_create_underlying_file(struct inode *lower_dir_inode, struct vfsmount *lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry); struct dentry *dentry_save; struct vfsmount *vfsmount_save; + unsigned int flags_save; int rc; dentry_save = nd->path.dentry; vfsmount_save = nd->path.mnt; + flags_save = nd->flags; nd->path.dentry = lower_dentry; nd->path.mnt = lower_mnt; + nd->flags &= ~LOOKUP_OPEN; rc = vfs_create(lower_dir_inode, lower_dentry, mode, nd); nd->path.dentry = dentry_save; nd->path.mnt = vfsmount_save; + nd->flags = flags_save; return rc; } |