static loff_t fuse_file_llseek(struct file *file, loff_t offset, int origin)
{
	loff_t retval;
	struct inode *inode = file->f_path.dentry->d_inode;

	mutex_lock(&inode->i_mutex);
	switch (origin) {
	case SEEK_END:
		retval = fuse_update_attributes(inode, NULL, file, NULL);
		if (retval)
			goto exit;
		offset += i_size_read(inode);
		break;
	case SEEK_CUR:
		offset += file->f_pos;
	}
	retval = -EINVAL;
	if (offset >= 0 && offset <= inode->i_sb->s_maxbytes) {
		if (offset != file->f_pos) {
			file->f_pos = offset;
			file->f_version = 0;
		}
		retval = offset;
	}
exit:
	mutex_unlock(&inode->i_mutex);
	return retval;
}

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.