int ecryptfs_privileged_open(struct file **lower_file,
			     struct dentry *lower_dentry,
			     struct vfsmount *lower_mnt,
			     const struct cred *cred)
{
	struct ecryptfs_open_req req;
	int flags = O_LARGEFILE;
	int rc = 0;

	init_completion(&req.done);
	req.lower_file = lower_file;
	req.path.dentry = lower_dentry;
	req.path.mnt = lower_mnt;

	/* Corresponding dput() and mntput() are done when the
	 * lower file is fput() when all eCryptfs files for the inode are
	 * released. */
 	flags |= IS_RDONLY(d_inode(lower_dentry)) ? O_RDONLY : O_RDWR;
 	(*lower_file) = dentry_open(&req.path, flags, cred);
 	if (!IS_ERR(*lower_file))
		goto out;
 	if ((flags & O_ACCMODE) == O_RDONLY) {
 		rc = PTR_ERR((*lower_file));
 		goto out;
	}
	mutex_lock(&ecryptfs_kthread_ctl.mux);
	if (ecryptfs_kthread_ctl.flags & ECRYPTFS_KTHREAD_ZOMBIE) {
		rc = -EIO;
		mutex_unlock(&ecryptfs_kthread_ctl.mux);
		printk(KERN_ERR "%s: We are in the middle of shutting down; "
		       "aborting privileged request to open lower file\n",
			__func__);
		goto out;
	}
	list_add_tail(&req.kthread_ctl_list, &ecryptfs_kthread_ctl.req_list);
 	mutex_unlock(&ecryptfs_kthread_ctl.mux);
 	wake_up(&ecryptfs_kthread_ctl.wait);
 	wait_for_completion(&req.done);
	if (IS_ERR(*lower_file))
 		rc = PTR_ERR(*lower_file);
 out:
 	return rc;
 }

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.