static struct dentry *proc_mount(struct file_system_type *fs_type,
	int flags, const char *dev_name, void *data)
{
	int err;
	struct super_block *sb;
	struct pid_namespace *ns;
	struct proc_inode *ei;

	if (flags & MS_KERNMOUNT)
		ns = (struct pid_namespace *)data;
	else
		ns = current->nsproxy->pid_ns;

	sb = sget(fs_type, proc_test_super, proc_set_super, ns);
	if (IS_ERR(sb))
		return ERR_CAST(sb);

	if (!sb->s_root) {
		sb->s_flags = flags;
		err = proc_fill_super(sb);
		if (err) {
			deactivate_locked_super(sb);
			return ERR_PTR(err);
		}

		sb->s_flags |= MS_ACTIVE;
	}

	ei = PROC_I(sb->s_root->d_inode);
	if (!ei->pid) {
		rcu_read_lock();
		ei->pid = get_pid(find_pid_ns(1, ns));
		rcu_read_unlock();
	}

	return dget(sb->s_root);
}

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.