static __latent_entropy struct task_struct *copy_process(
					struct pid *pid,
					int trace,
					int node,
					struct kernel_clone_args *args)
{
	int pidfd = -1, retval;
	struct task_struct *p;
	struct multiprocess_signals delayed;
	struct file *pidfile = NULL;
	u64 clone_flags = args->flags;
	struct nsproxy *nsp = current->nsproxy;

	/*
	 * Don't allow sharing the root directory with processes in a different
	 * namespace
	 */
	if ((clone_flags & (CLONE_NEWNS|CLONE_FS)) == (CLONE_NEWNS|CLONE_FS))
		return ERR_PTR(-EINVAL);

	if ((clone_flags & (CLONE_NEWUSER|CLONE_FS)) == (CLONE_NEWUSER|CLONE_FS))
		return ERR_PTR(-EINVAL);

	/*
	 * Thread groups must share signals as well, and detached threads
	 * can only be started up within the thread group.
	 */
	if ((clone_flags & CLONE_THREAD) && !(clone_flags & CLONE_SIGHAND))
		return ERR_PTR(-EINVAL);

	/*
	 * Shared signal handlers imply shared VM. By way of the above,
	 * thread groups also imply shared VM. Blocking this case allows
	 * for various simplifications in other code.
	 */
	if ((clone_flags & CLONE_SIGHAND) && !(clone_flags & CLONE_VM))
		return ERR_PTR(-EINVAL);

	/*
	 * Siblings of global init remain as zombies on exit since they are
	 * not reaped by their parent (swapper). To solve this and to avoid
	 * multi-rooted process trees, prevent global and container-inits
	 * from creating siblings.
	 */
	if ((clone_flags & CLONE_PARENT) &&
				current->signal->flags & SIGNAL_UNKILLABLE)
		return ERR_PTR(-EINVAL);

	/*
	 * If the new process will be in a different pid or user namespace
	 * do not allow it to share a thread group with the forking task.
	 */
	if (clone_flags & CLONE_THREAD) {
		if ((clone_flags & (CLONE_NEWUSER | CLONE_NEWPID)) ||
		    (task_active_pid_ns(current) != nsp->pid_ns_for_children))
			return ERR_PTR(-EINVAL);
	}

	/*
	 * If the new process will be in a different time namespace
	 * do not allow it to share VM or a thread group with the forking task.
	 */
	if (clone_flags & (CLONE_THREAD | CLONE_VM)) {
		if (nsp->time_ns != nsp->time_ns_for_children)
			return ERR_PTR(-EINVAL);
	}

	if (clone_flags & CLONE_PIDFD) {
		/*
		 * - CLONE_DETACHED is blocked so that we can potentially
		 *   reuse it later for CLONE_PIDFD.
		 * - CLONE_THREAD is blocked until someone really needs it.
		 */
		if (clone_flags & (CLONE_DETACHED | CLONE_THREAD))
			return ERR_PTR(-EINVAL);
	}

	/*
	 * Force any signals received before this point to be delivered
	 * before the fork happens.  Collect up signals sent to multiple
	 * processes that happen during the fork and delay them so that
	 * they appear to happen after the fork.
	 */
	sigemptyset(&delayed.signal);
	INIT_HLIST_NODE(&delayed.node);

	spin_lock_irq(&current->sighand->siglock);
	if (!(clone_flags & CLONE_THREAD))
		hlist_add_head(&delayed.node, &current->signal->multiprocess);
	recalc_sigpending();
	spin_unlock_irq(&current->sighand->siglock);
	retval = -ERESTARTNOINTR;
	if (signal_pending(current))
		goto fork_out;

	retval = -ENOMEM;
	p = dup_task_struct(current, node);
	if (!p)
		goto fork_out;

	/*
	 * This _must_ happen before we call free_task(), i.e. before we jump
	 * to any of the bad_fork_* labels. This is to avoid freeing
	 * p->set_child_tid which is (ab)used as a kthread's data pointer for
	 * kernel threads (PF_KTHREAD).
	 */
	p->set_child_tid = (clone_flags & CLONE_CHILD_SETTID) ? args->child_tid : NULL;
	/*
	 * Clear TID on mm_release()?
	 */
	p->clear_child_tid = (clone_flags & CLONE_CHILD_CLEARTID) ? args->child_tid : NULL;

	ftrace_graph_init_task(p);

	rt_mutex_init_task(p);

	lockdep_assert_irqs_enabled();
#ifdef CONFIG_PROVE_LOCKING
	DEBUG_LOCKS_WARN_ON(!p->softirqs_enabled);
#endif
	retval = -EAGAIN;
	if (atomic_read(&p->real_cred->user->processes) >=
			task_rlimit(p, RLIMIT_NPROC)) {
		if (p->real_cred->user != INIT_USER &&
		    !capable(CAP_SYS_RESOURCE) && !capable(CAP_SYS_ADMIN))
			goto bad_fork_free;
	}
	current->flags &= ~PF_NPROC_EXCEEDED;

	retval = copy_creds(p, clone_flags);
	if (retval < 0)
		goto bad_fork_free;

	/*
	 * If multiple threads are within copy_process(), then this check
	 * triggers too late. This doesn't hurt, the check is only there
	 * to stop root fork bombs.
	 */
	retval = -EAGAIN;
	if (data_race(nr_threads >= max_threads))
		goto bad_fork_cleanup_count;

	delayacct_tsk_init(p);	/* Must remain after dup_task_struct() */
	p->flags &= ~(PF_SUPERPRIV | PF_WQ_WORKER | PF_IDLE);
	p->flags |= PF_FORKNOEXEC;
	INIT_LIST_HEAD(&p->children);
	INIT_LIST_HEAD(&p->sibling);
	rcu_copy_process(p);
	p->vfork_done = NULL;
	spin_lock_init(&p->alloc_lock);

	init_sigpending(&p->pending);

	p->utime = p->stime = p->gtime = 0;
#ifdef CONFIG_ARCH_HAS_SCALED_CPUTIME
	p->utimescaled = p->stimescaled = 0;
#endif
	prev_cputime_init(&p->prev_cputime);

#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
	seqcount_init(&p->vtime.seqcount);
	p->vtime.starttime = 0;
	p->vtime.state = VTIME_INACTIVE;
#endif

#ifdef CONFIG_IO_URING
	p->io_uring = NULL;
#endif

#if defined(SPLIT_RSS_COUNTING)
	memset(&p->rss_stat, 0, sizeof(p->rss_stat));
#endif

	p->default_timer_slack_ns = current->timer_slack_ns;

#ifdef CONFIG_PSI
	p->psi_flags = 0;
#endif

	task_io_accounting_init(&p->ioac);
	acct_clear_integrals(p);

	posix_cputimers_init(&p->posix_cputimers);

	p->io_context = NULL;
	audit_set_context(p, NULL);
	cgroup_fork(p);
#ifdef CONFIG_NUMA
	p->mempolicy = mpol_dup(p->mempolicy);
	if (IS_ERR(p->mempolicy)) {
		retval = PTR_ERR(p->mempolicy);
		p->mempolicy = NULL;
		goto bad_fork_cleanup_threadgroup_lock;
	}
#endif
#ifdef CONFIG_CPUSETS
	p->cpuset_mem_spread_rotor = NUMA_NO_NODE;
	p->cpuset_slab_spread_rotor = NUMA_NO_NODE;
	seqcount_spinlock_init(&p->mems_allowed_seq, &p->alloc_lock);
#endif
#ifdef CONFIG_TRACE_IRQFLAGS
	memset(&p->irqtrace, 0, sizeof(p->irqtrace));
	p->irqtrace.hardirq_disable_ip	= _THIS_IP_;
	p->irqtrace.softirq_enable_ip	= _THIS_IP_;
	p->softirqs_enabled		= 1;
	p->softirq_context		= 0;
#endif

	p->pagefault_disabled = 0;

#ifdef CONFIG_LOCKDEP
	lockdep_init_task(p);
#endif

#ifdef CONFIG_DEBUG_MUTEXES
	p->blocked_on = NULL; /* not blocked yet */
#endif
#ifdef CONFIG_BCACHE
	p->sequential_io	= 0;
	p->sequential_io_avg	= 0;
#endif

	/* Perform scheduler related setup. Assign this task to a CPU. */
	retval = sched_fork(clone_flags, p);
	if (retval)
		goto bad_fork_cleanup_policy;

	retval = perf_event_init_task(p);
	if (retval)
		goto bad_fork_cleanup_policy;
	retval = audit_alloc(p);
	if (retval)
		goto bad_fork_cleanup_perf;
	/* copy all the process information */
	shm_init_task(p);
	retval = security_task_alloc(p, clone_flags);
	if (retval)
		goto bad_fork_cleanup_audit;
	retval = copy_semundo(clone_flags, p);
	if (retval)
		goto bad_fork_cleanup_security;
	retval = copy_files(clone_flags, p);
	if (retval)
		goto bad_fork_cleanup_semundo;
	retval = copy_fs(clone_flags, p);
	if (retval)
		goto bad_fork_cleanup_files;
	retval = copy_sighand(clone_flags, p);
	if (retval)
		goto bad_fork_cleanup_fs;
	retval = copy_signal(clone_flags, p);
	if (retval)
		goto bad_fork_cleanup_sighand;
	retval = copy_mm(clone_flags, p);
	if (retval)
		goto bad_fork_cleanup_signal;
	retval = copy_namespaces(clone_flags, p);
	if (retval)
		goto bad_fork_cleanup_mm;
	retval = copy_io(clone_flags, p);
	if (retval)
		goto bad_fork_cleanup_namespaces;
	retval = copy_thread(clone_flags, args->stack, args->stack_size, p, args->tls);
	if (retval)
		goto bad_fork_cleanup_io;

	stackleak_task_init(p);

	if (pid != &init_struct_pid) {
		pid = alloc_pid(p->nsproxy->pid_ns_for_children, args->set_tid,
				args->set_tid_size);
		if (IS_ERR(pid)) {
			retval = PTR_ERR(pid);
			goto bad_fork_cleanup_thread;
		}
	}

	/*
	 * This has to happen after we've potentially unshared the file
	 * descriptor table (so that the pidfd doesn't leak into the child
	 * if the fd table isn't shared).
	 */
	if (clone_flags & CLONE_PIDFD) {
		retval = get_unused_fd_flags(O_RDWR | O_CLOEXEC);
		if (retval < 0)
			goto bad_fork_free_pid;

		pidfd = retval;

		pidfile = anon_inode_getfile("[pidfd]", &pidfd_fops, pid,
					      O_RDWR | O_CLOEXEC);
		if (IS_ERR(pidfile)) {
			put_unused_fd(pidfd);
			retval = PTR_ERR(pidfile);
			goto bad_fork_free_pid;
		}
		get_pid(pid);	/* held by pidfile now */

		retval = put_user(pidfd, args->pidfd);
		if (retval)
			goto bad_fork_put_pidfd;
	}

#ifdef CONFIG_BLOCK
	p->plug = NULL;
#endif
	futex_init_task(p);

	/*
	 * sigaltstack should be cleared when sharing the same VM
	 */
	if ((clone_flags & (CLONE_VM|CLONE_VFORK)) == CLONE_VM)
		sas_ss_reset(p);

	/*
	 * Syscall tracing and stepping should be turned off in the
	 * child regardless of CLONE_PTRACE.
	 */
	user_disable_single_step(p);
	clear_tsk_thread_flag(p, TIF_SYSCALL_TRACE);
#ifdef TIF_SYSCALL_EMU
	clear_tsk_thread_flag(p, TIF_SYSCALL_EMU);
#endif
	clear_tsk_latency_tracing(p);

	/* ok, now we should be set up.. */
	p->pid = pid_nr(pid);
	if (clone_flags & CLONE_THREAD) {
		p->group_leader = current->group_leader;
		p->tgid = current->tgid;
	} else {
		p->group_leader = p;
		p->tgid = p->pid;
	}

	p->nr_dirtied = 0;
	p->nr_dirtied_pause = 128 >> (PAGE_SHIFT - 10);
	p->dirty_paused_when = 0;

	p->pdeath_signal = 0;
	INIT_LIST_HEAD(&p->thread_group);
	p->task_works = NULL;

	/*
	 * Ensure that the cgroup subsystem policies allow the new process to be
	 * forked. It should be noted that the new process's css_set can be changed
	 * between here and cgroup_post_fork() if an organisation operation is in
	 * progress.
	 */
	retval = cgroup_can_fork(p, args);
	if (retval)
		goto bad_fork_put_pidfd;

	/*
	 * From this point on we must avoid any synchronous user-space
	 * communication until we take the tasklist-lock. In particular, we do
	 * not want user-space to be able to predict the process start-time by
	 * stalling fork(2) after we recorded the start_time but before it is
	 * visible to the system.
	 */

	p->start_time = ktime_get_ns();
	p->start_boottime = ktime_get_boottime_ns();

	/*
	 * Make it visible to the rest of the system, but dont wake it up yet.
	 * Need tasklist lock for parent etc handling!
	 */
	write_lock_irq(&tasklist_lock);

	/* CLONE_PARENT re-uses the old parent */
	if (clone_flags & (CLONE_PARENT|CLONE_THREAD)) {
		p->real_parent = current->real_parent;
		p->parent_exec_id = current->parent_exec_id;
		if (clone_flags & CLONE_THREAD)
			p->exit_signal = -1;
		else
			p->exit_signal = current->group_leader->exit_signal;
	} else {
		p->real_parent = current;
		p->parent_exec_id = current->self_exec_id;
		p->exit_signal = args->exit_signal;
	}

	klp_copy_process(p);

	spin_lock(&current->sighand->siglock);

	/*
	 * Copy seccomp details explicitly here, in case they were changed
	 * before holding sighand lock.
	 */
	copy_seccomp(p);

	rseq_fork(p, clone_flags);

	/* Don't start children in a dying pid namespace */
	if (unlikely(!(ns_of_pid(pid)->pid_allocated & PIDNS_ADDING))) {
		retval = -ENOMEM;
		goto bad_fork_cancel_cgroup;
	}

	/* Let kill terminate clone/fork in the middle */
	if (fatal_signal_pending(current)) {
		retval = -EINTR;
		goto bad_fork_cancel_cgroup;
	}

	/* past the last point of failure */
	if (pidfile)
		fd_install(pidfd, pidfile);

	init_task_pid_links(p);
	if (likely(p->pid)) {
		ptrace_init_task(p, (clone_flags & CLONE_PTRACE) || trace);

		init_task_pid(p, PIDTYPE_PID, pid);
		if (thread_group_leader(p)) {
			init_task_pid(p, PIDTYPE_TGID, pid);
			init_task_pid(p, PIDTYPE_PGID, task_pgrp(current));
			init_task_pid(p, PIDTYPE_SID, task_session(current));

			if (is_child_reaper(pid)) {
				ns_of_pid(pid)->child_reaper = p;
				p->signal->flags |= SIGNAL_UNKILLABLE;
			}
			p->signal->shared_pending.signal = delayed.signal;
			p->signal->tty = tty_kref_get(current->signal->tty);
			/*
			 * Inherit has_child_subreaper flag under the same
			 * tasklist_lock with adding child to the process tree
			 * for propagate_has_child_subreaper optimization.
			 */
			p->signal->has_child_subreaper = p->real_parent->signal->has_child_subreaper ||
							 p->real_parent->signal->is_child_subreaper;
			list_add_tail(&p->sibling, &p->real_parent->children);
			list_add_tail_rcu(&p->tasks, &init_task.tasks);
			attach_pid(p, PIDTYPE_TGID);
			attach_pid(p, PIDTYPE_PGID);
			attach_pid(p, PIDTYPE_SID);
			__this_cpu_inc(process_counts);
		} else {
			current->signal->nr_threads++;
			atomic_inc(&current->signal->live);
			refcount_inc(&current->signal->sigcnt);
			task_join_group_stop(p);
			list_add_tail_rcu(&p->thread_group,
					  &p->group_leader->thread_group);
			list_add_tail_rcu(&p->thread_node,
					  &p->signal->thread_head);
		}
		attach_pid(p, PIDTYPE_PID);
		nr_threads++;
	}
	total_forks++;
	hlist_del_init(&delayed.node);
	spin_unlock(&current->sighand->siglock);
	syscall_tracepoint_update(p);
	write_unlock_irq(&tasklist_lock);

	proc_fork_connector(p);
	sched_post_fork(p);
	cgroup_post_fork(p, args);
	perf_event_fork(p);

	trace_task_newtask(p, clone_flags);
	uprobe_copy_process(p, clone_flags);

	copy_oom_score_adj(clone_flags, p);

	return p;

bad_fork_cancel_cgroup:
	spin_unlock(&current->sighand->siglock);
	write_unlock_irq(&tasklist_lock);
	cgroup_cancel_fork(p, args);
bad_fork_put_pidfd:
	if (clone_flags & CLONE_PIDFD) {
		fput(pidfile);
		put_unused_fd(pidfd);
	}
bad_fork_free_pid:
	if (pid != &init_struct_pid)
		free_pid(pid);
bad_fork_cleanup_thread:
	exit_thread(p);
bad_fork_cleanup_io:
	if (p->io_context)
		exit_io_context(p);
bad_fork_cleanup_namespaces:
	exit_task_namespaces(p);
bad_fork_cleanup_mm:
	if (p->mm) {
		mm_clear_owner(p->mm, p);
		mmput(p->mm);
	}
bad_fork_cleanup_signal:
	if (!(clone_flags & CLONE_THREAD))
		free_signal_struct(p->signal);
bad_fork_cleanup_sighand:
	__cleanup_sighand(p->sighand);
bad_fork_cleanup_fs:
	exit_fs(p); /* blocking */
bad_fork_cleanup_files:
	exit_files(p); /* blocking */
bad_fork_cleanup_semundo:
	exit_sem(p);
bad_fork_cleanup_security:
	security_task_free(p);
bad_fork_cleanup_audit:
	audit_free(p);
bad_fork_cleanup_perf:
	perf_event_free_task(p);
bad_fork_cleanup_policy:
	lockdep_free_task(p);
#ifdef CONFIG_NUMA
	mpol_put(p->mempolicy);
bad_fork_cleanup_threadgroup_lock:
#endif
	delayacct_tsk_free(p);
bad_fork_cleanup_count:
	atomic_dec(&p->cred->user->processes);
	exit_creds(p);
bad_fork_free:
	p->state = TASK_DEAD;
	put_task_stack(p);
	delayed_free_task(p);
fork_out:
	spin_lock_irq(&current->sighand->siglock);
	hlist_del_init(&delayed.node);
	spin_unlock_irq(&current->sighand->siglock);
	return ERR_PTR(retval);
}

unsigned long total_forks;

int nr_threads;

static int max_threads;

static const char * const resident_page_types[] = {
	NAMED_ARRAY_INDEX(MM_FILEPAGES),
	NAMED_ARRAY_INDEX(MM_ANONPAGES),
	NAMED_ARRAY_INDEX(MM_SWAPENTS),
	NAMED_ARRAY_INDEX(MM_SHMEMPAGES),
};

DEFINE_PER_CPU(unsigned long, process_counts) = 0;

__cacheline_aligned DEFINE_RWLOCK(tasklist_lock);

static struct kmem_cache *task_struct_cachep;

static DEFINE_PER_CPU(struct vm_struct *, cached_stacks[NR_CACHED_STACKS]);

static struct kmem_cache *thread_stack_cache;

static struct kmem_cache *signal_cachep;

struct kmem_cache *sighand_cachep;

struct kmem_cache *files_cachep;

struct kmem_cache *fs_cachep;

static struct kmem_cache *vm_area_cachep;

static struct kmem_cache *mm_cachep;

int arch_task_struct_size

static unsigned long default_dump_filter = MMF_DUMP_FILTER_DEFAULT;

const struct file_operations pidfd_fops = {
	.release = pidfd_release,
	.poll = pidfd_poll,
#ifdef CONFIG_PROC_FS
	.show_fdinfo = pidfd_show_fdinfo,
#endif
};

static __latent_entropy struct


static void release_task_stack(struct task_struct *tsk)
{
	if (WARN_ON(tsk->state != TASK_DEAD))
		return;  /* Better to leak the stack than to free prematurely */

	account_kernel_stack(tsk, -1);
	free_thread_stack(tsk);
	tsk->stack = NULL;
#ifdef CONFIG_VMAP_STACK
	tsk->stack_vm_area = NULL;
#endif
}

fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent

current->group_leader->exit_signal may change during copy_process() if
current->real_parent exits.

Move the assignment inside tasklist_lock to avoid the race.

Signed-off-by: Eddy Wu <eddy_wu@trendmicro.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

static int max_threads;

static const char * const resident_page_types[] = {
	NAMED_ARRAY_INDEX(MM_FILEPAGES),
	NAMED_ARRAY_INDEX(MM_ANONPAGES),
	NAMED_ARRAY_INDEX(MM_SWAPENTS),
	NAMED_ARRAY_INDEX(MM_SHMEMPAGES),
};

static struct kmem_cache *task_struct_cachep;

static DEFINE_PER_CPU(struct vm_struct *, cached_stacks[NR_CACHED_STACKS]);

static struct kmem_cache *thread_stack_cache;

static struct kmem_cache *signal_cachep;

struct kmem_cache *sighand_cachep;

struct kmem_cache *files_cachep;

struct kmem_cache *fs_cachep;

static struct kmem_cache *vm_area_cachep;

static struct kmem_cache *mm_cachep;

void __init

static unsigned long default_dump_filter = MMF_DUMP_FILTER_DEFAULT;

const struct file_operations pidfd_fops = {
	.release = pidfd_release,
	.poll = pidfd_poll,
#ifdef CONFIG_PROC_FS
	.show_fdinfo = pidfd_show_fdinfo,
#endif
};

static __latent_entropy struct


void set_task_stack_end_magic(struct task_struct *tsk)
{
	unsigned long *stackend;

	stackend = end_of_stack(tsk);
	*stackend = STACK_END_MAGIC;	/* for overflow detection */
}


void thread_stack_cache_init(void)
{
	thread_stack_cache = kmem_cache_create_usercopy("thread_stack",
					THREAD_SIZE, THREAD_SIZE, 0, 0,
					THREAD_SIZE, NULL);
	BUG_ON(thread_stack_cache == NULL);
}

static struct kmem_cache *thread_stack_cache;

void __init


static inline void rcu_copy_process(struct task_struct *p)
{
#ifdef CONFIG_PREEMPT_RCU
	p->rcu_read_lock_nesting = 0;
	p->rcu_read_unlock_special.s = 0;
	p->rcu_blocked_node = NULL;
	INIT_LIST_HEAD(&p->rcu_node_entry);
#endif /* #ifdef CONFIG_PREEMPT_RCU */
#ifdef CONFIG_TASKS_RCU
	p->rcu_tasks_holdout = false;
	INIT_LIST_HEAD(&p->rcu_tasks_holdout_list);
	p->rcu_tasks_idle_cpu = -1;
#endif /* #ifdef CONFIG_TASKS_RCU */
#ifdef CONFIG_TASKS_TRACE_RCU
	p->trc_reader_nesting = 0;
	p->trc_reader_special.s = 0;
	INIT_LIST_HEAD(&p->trc_holdout_list);
#endif /* #ifdef CONFIG_TASKS_TRACE_RCU */
}


pid_t kernel_clone(struct kernel_clone_args *args)
{
	u64 clone_flags = args->flags;
	struct completion vfork;
	struct pid *pid;
	struct task_struct *p;
	int trace = 0;
	pid_t nr;

	/*
	 * For legacy clone() calls, CLONE_PIDFD uses the parent_tid argument
	 * to return the pidfd. Hence, CLONE_PIDFD and CLONE_PARENT_SETTID are
	 * mutually exclusive. With clone3() CLONE_PIDFD has grown a separate
	 * field in struct clone_args and it still doesn't make sense to have
	 * them both point at the same memory location. Performing this check
	 * here has the advantage that we don't need to have a separate helper
	 * to check for legacy clone().
	 */
	if ((args->flags & CLONE_PIDFD) &&
	    (args->flags & CLONE_PARENT_SETTID) &&
	    (args->pidfd == args->parent_tid))
		return -EINVAL;

	/*
	 * Determine whether and which event to report to ptracer.  When
	 * called from kernel_thread or CLONE_UNTRACED is explicitly
	 * requested, no event is reported; otherwise, report if the event
	 * for the type of forking is enabled.
	 */
	if (!(clone_flags & CLONE_UNTRACED)) {
		if (clone_flags & CLONE_VFORK)
			trace = PTRACE_EVENT_VFORK;
		else if (args->exit_signal != SIGCHLD)
			trace = PTRACE_EVENT_CLONE;
		else
			trace = PTRACE_EVENT_FORK;

		if (likely(!ptrace_event_enabled(current, trace)))
			trace = 0;
	}

	p = copy_process(NULL, trace, NUMA_NO_NODE, args);
	add_latent_entropy();

	if (IS_ERR(p))
		return PTR_ERR(p);

	/*
	 * Do this prior waking up the new thread - the thread pointer
	 * might get invalid after that point, if the thread exits quickly.
	 */
	trace_sched_process_fork(current, p);

	pid = get_task_pid(p, PIDTYPE_PID);
	nr = pid_vnr(pid);

	if (clone_flags & CLONE_PARENT_SETTID)
		put_user(nr, args->parent_tid);

	if (clone_flags & CLONE_VFORK) {
		p->vfork_done = &vfork;
		init_completion(&vfork);
		get_task_struct(p);
	}

	wake_up_new_task(p);

	/* forking complete and child started to run, tell ptracer */
	if (unlikely(trace))
		ptrace_event_pid(trace, pid);

	if (clone_flags & CLONE_VFORK) {
		if (!wait_for_vfork_done(p, &vfork))
			ptrace_event_pid(PTRACE_EVENT_VFORK_DONE, pid);
	}

	put_pid(pid);
	return nr;
}

int nr_threads;

static int max_threads;

static struct kmem_cache *task_struct_cachep;

static DEFINE_PER_CPU(struct vm_struct *, cached_stacks[NR_CACHED_STACKS]);

static struct kmem_cache *thread_stack_cache;

static struct kmem_cache *signal_cachep;

struct kmem_cache *sighand_cachep;

struct kmem_cache *files_cachep;

struct kmem_cache *fs_cachep;

static struct kmem_cache *vm_area_cachep;

static struct kmem_cache *mm_cachep;

int arch_task_struct_size

const struct file_operations pidfd_fops = {
	.release = pidfd_release,
	.poll = pidfd_poll,
#ifdef CONFIG_PROC_FS
	.show_fdinfo = pidfd_show_fdinfo,
#endif
};

static __latent_entropy struct


int ksys_unshare(unsigned long unshare_flags)
{
	struct fs_struct *fs, *new_fs = NULL;
	struct files_struct *fd, *new_fd = NULL;
	struct cred *new_cred = NULL;
	struct nsproxy *new_nsproxy = NULL;
	int do_sysvsem = 0;
	int err;

	/*
	 * If unsharing a user namespace must also unshare the thread group
	 * and unshare the filesystem root and working directories.
	 */
	if (unshare_flags & CLONE_NEWUSER)
		unshare_flags |= CLONE_THREAD | CLONE_FS;
	/*
	 * If unsharing vm, must also unshare signal handlers.
	 */
	if (unshare_flags & CLONE_VM)
		unshare_flags |= CLONE_SIGHAND;
	/*
	 * If unsharing a signal handlers, must also unshare the signal queues.
	 */
	if (unshare_flags & CLONE_SIGHAND)
		unshare_flags |= CLONE_THREAD;
	/*
	 * If unsharing namespace, must also unshare filesystem information.
	 */
	if (unshare_flags & CLONE_NEWNS)
		unshare_flags |= CLONE_FS;

	err = check_unshare_flags(unshare_flags);
	if (err)
		goto bad_unshare_out;
	/*
	 * CLONE_NEWIPC must also detach from the undolist: after switching
	 * to a new ipc namespace, the semaphore arrays from the old
	 * namespace are unreachable.
	 */
	if (unshare_flags & (CLONE_NEWIPC|CLONE_SYSVSEM))
		do_sysvsem = 1;
	err = unshare_fs(unshare_flags, &new_fs);
	if (err)
		goto bad_unshare_out;
	err = unshare_fd(unshare_flags, NR_OPEN_MAX, &new_fd);
	if (err)
		goto bad_unshare_cleanup_fs;
	err = unshare_userns(unshare_flags, &new_cred);
	if (err)
		goto bad_unshare_cleanup_fd;
	err = unshare_nsproxy_namespaces(unshare_flags, &new_nsproxy,
					 new_cred, new_fs);
	if (err)
		goto bad_unshare_cleanup_cred;

	if (new_fs || new_fd || do_sysvsem || new_cred || new_nsproxy) {
		if (do_sysvsem) {
			/*
			 * CLONE_SYSVSEM is equivalent to sys_exit().
			 */
			exit_sem(current);
		}
		if (unshare_flags & CLONE_NEWIPC) {
			/* Orphan segments in old ns (see sem above). */
			exit_shm(current);
			shm_init_task(current);
		}

		if (new_nsproxy)
			switch_task_namespaces(current, new_nsproxy);

		task_lock(current);

		if (new_fs) {
			fs = current->fs;
			spin_lock(&fs->lock);
			current->fs = new_fs;
			if (--fs->users)
				new_fs = NULL;
			else
				new_fs = fs;
			spin_unlock(&fs->lock);
		}

		if (new_fd) {
			fd = current->files;
			current->files = new_fd;
			new_fd = fd;
		}

		task_unlock(current);

		if (new_cred) {
			/* Install the new user namespace */
			commit_creds(new_cred);
			new_cred = NULL;
		}
	}

	perf_event_namespaces(current);

bad_unshare_cleanup_cred:
	if (new_cred)
		put_cred(new_cred);
bad_unshare_cleanup_fd:
	if (new_fd)
		put_files_struct(new_fd);

bad_unshare_cleanup_fs:
	if (new_fs)
		free_fs_struct(new_fs);

bad_unshare_out:
	return err;
}

unsigned long total_forks;

int nr_threads;

static int max_threads;

DEFINE_PER_CPU(unsigned long, process_counts) = 0;

static struct kmem_cache *task_struct_cachep;

static DEFINE_PER_CPU(struct vm_struct *, cached_stacks[NR_CACHED_STACKS]);

static struct kmem_cache *thread_stack_cache;

static struct kmem_cache *signal_cachep;

struct kmem_cache *sighand_cachep;

struct kmem_cache *files_cachep;

struct kmem_cache *fs_cachep;

static struct kmem_cache *vm_area_cachep;

static struct kmem_cache *mm_cachep;

int arch_task_struct_size

static unsigned long default_dump_filter = MMF_DUMP_FILTER_DEFAULT;

const struct file_operations pidfd_fops = {
	.release = pidfd_release,
	.poll = pidfd_poll,
#ifdef CONFIG_PROC_FS
	.show_fdinfo = pidfd_show_fdinfo,
#endif
};

static __latent_entropy struct


static inline void init_idle_pids(struct task_struct *idle)
{
	enum pid_type type;

	for (type = PIDTYPE_PID; type < PIDTYPE_MAX; ++type) {
		INIT_HLIST_NODE(&idle->pid_links[type]); /* not really needed */
		init_task_pid(idle, type, &init_struct_pid);
	}
}


int unshare_fd(unsigned long unshare_flags, unsigned int max_fds,
	       struct files_struct **new_fdp)
{
	struct files_struct *fd = current->files;
	int error = 0;

	if ((unshare_flags & CLONE_FILES) &&
	    (fd && atomic_read(&fd->count) > 1)) {
		*new_fdp = dup_fd(fd, max_fds, &error);
		if (!*new_fdp)
			return error;
	}

	return 0;
}


noinline static int copy_clone_args_from_user(struct kernel_clone_args *kargs,
					      struct clone_args __user *uargs,
					      size_t usize)
{
	int err;
	struct clone_args args;
	pid_t *kset_tid = kargs->set_tid;

	BUILD_BUG_ON(offsetofend(struct clone_args, tls) !=
		     CLONE_ARGS_SIZE_VER0);
	BUILD_BUG_ON(offsetofend(struct clone_args, set_tid_size) !=
		     CLONE_ARGS_SIZE_VER1);
	BUILD_BUG_ON(offsetofend(struct clone_args, cgroup) !=
		     CLONE_ARGS_SIZE_VER2);
	BUILD_BUG_ON(sizeof(struct clone_args) != CLONE_ARGS_SIZE_VER2);

	if (unlikely(usize > PAGE_SIZE))
		return -E2BIG;
	if (unlikely(usize < CLONE_ARGS_SIZE_VER0))
		return -EINVAL;

	err = copy_struct_from_user(&args, sizeof(args), uargs, usize);
	if (err)
		return err;

	if (unlikely(args.set_tid_size > MAX_PID_NS_LEVEL))
		return -EINVAL;

	if (unlikely(!args.set_tid && args.set_tid_size > 0))
		return -EINVAL;

	if (unlikely(args.set_tid && args.set_tid_size == 0))
		return -EINVAL;

	/*
	 * Verify that higher 32bits of exit_signal are unset and that
	 * it is a valid signal
	 */
	if (unlikely((args.exit_signal & ~((u64)CSIGNAL)) ||
		     !valid_signal(args.exit_signal)))
		return -EINVAL;

	if ((args.flags & CLONE_INTO_CGROUP) &&
	    (args.cgroup > INT_MAX || usize < CLONE_ARGS_SIZE_VER2))
		return -EINVAL;

	*kargs = (struct kernel_clone_args){
		.flags		= args.flags,
		.pidfd		= u64_to_user_ptr(args.pidfd),
		.child_tid	= u64_to_user_ptr(args.child_tid),
		.parent_tid	= u64_to_user_ptr(args.parent_tid),
		.exit_signal	= args.exit_signal,
		.stack		= args.stack,
		.stack_size	= args.stack_size,
		.tls		= args.tls,
		.set_tid_size	= args.set_tid_size,
		.cgroup		= args.cgroup,
	};

	if (args.set_tid &&
		copy_from_user(kset_tid, u64_to_user_ptr(args.set_tid),
			(kargs->set_tid_size * sizeof(pid_t))))
		return -EFAULT;

	kargs->set_tid = kset_tid;

	return 0;
}

int nr_threads;

static int max_threads;

static const char * const resident_page_types[] = {
	NAMED_ARRAY_INDEX(MM_FILEPAGES),
	NAMED_ARRAY_INDEX(MM_ANONPAGES),
	NAMED_ARRAY_INDEX(MM_SWAPENTS),
	NAMED_ARRAY_INDEX(MM_SHMEMPAGES),
};

static struct kmem_cache *task_struct_cachep;

static DEFINE_PER_CPU(struct vm_struct *, cached_stacks[NR_CACHED_STACKS]);

static struct kmem_cache *thread_stack_cache;

static struct kmem_cache *signal_cachep;

struct kmem_cache *sighand_cachep;

struct kmem_cache *files_cachep;

struct kmem_cache *fs_cachep;

static struct kmem_cache *vm_area_cachep;

static struct kmem_cache *mm_cachep;

int arch_task_struct_size

static unsigned long default_dump_filter = MMF_DUMP_FILTER_DEFAULT;

const struct file_operations pidfd_fops = {
	.release = pidfd_release,
	.poll = pidfd_poll,
#ifdef CONFIG_PROC_FS
	.show_fdinfo = pidfd_show_fdinfo,
#endif
};

static __latent_entropy struct


void free_task(struct task_struct *tsk)
{
	scs_release(tsk);

#ifndef CONFIG_THREAD_INFO_IN_TASK
	/*
	 * The task is finally done with both the stack and thread_info,
	 * so free both.
	 */
	release_task_stack(tsk);
#else
	/*
	 * If the task had a separate stack allocation, it should be gone
	 * by now.
	 */
	WARN_ON_ONCE(refcount_read(&tsk->stack_refcount) != 0);
#endif
	rt_mutex_debug_task_free(tsk);
	ftrace_graph_exit_task(tsk);
	arch_release_task_struct(tsk);
	if (tsk->flags & PF_KTHREAD)
		free_kthread_struct(tsk);
	free_task_struct(tsk);
}

static struct kmem_cache *task_struct_cachep;

static DEFINE_PER_CPU(struct vm_struct *, cached_stacks[NR_CACHED_STACKS]);

static struct kmem_cache *thread_stack_cache;

static struct kmem_cache *signal_cachep;

struct kmem_cache *sighand_cachep;

struct kmem_cache *files_cachep;

struct kmem_cache *fs_cachep;

static struct kmem_cache *vm_area_cachep;

static struct kmem_cache *mm_cachep;

void __init

const struct file_operations pidfd_fops = {
	.release = pidfd_release,
	.poll = pidfd_poll,
#ifdef CONFIG_PROC_FS
	.show_fdinfo = pidfd_show_fdinfo,
#endif
};

static __latent_entropy struct


init_task_pid(struct task_struct *task, enum pid_type type, struct pid *pid)
{
	if (type == PIDTYPE_PID)
		task->thread_pid = pid;
	else
		task->signal->pids[type] = pid;
}

static struct kmem_cache *task_struct_cachep;

static DEFINE_PER_CPU(struct vm_struct *, cached_stacks[NR_CACHED_STACKS]);

static struct kmem_cache *thread_stack_cache;

static struct kmem_cache *signal_cachep;

struct kmem_cache *sighand_cachep;

struct kmem_cache *files_cachep;

struct kmem_cache *fs_cachep;

static struct kmem_cache *vm_area_cachep;

static struct kmem_cache *mm_cachep;

const struct file_operations pidfd_fops = {
	.release = pidfd_release,
	.poll = pidfd_poll,
#ifdef CONFIG_PROC_FS
	.show_fdinfo = pidfd_show_fdinfo,
#endif
};

static __latent_entropy struct


static inline struct task_struct *alloc_task_struct_node(int node)
{
	return kmem_cache_alloc_node(task_struct_cachep, GFP_KERNEL, node);
}

int nr_threads;

static int max_threads;

static const char * const resident_page_types[] = {
	NAMED_ARRAY_INDEX(MM_FILEPAGES),
	NAMED_ARRAY_INDEX(MM_ANONPAGES),
	NAMED_ARRAY_INDEX(MM_SWAPENTS),
	NAMED_ARRAY_INDEX(MM_SHMEMPAGES),
};

static struct kmem_cache *task_struct_cachep;

static DEFINE_PER_CPU(struct vm_struct *, cached_stacks[NR_CACHED_STACKS]);

static struct kmem_cache *thread_stack_cache;

static struct kmem_cache *signal_cachep;

struct kmem_cache *sighand_cachep;

struct kmem_cache *files_cachep;

struct kmem_cache *fs_cachep;

static struct kmem_cache *vm_area_cachep;

static struct kmem_cache *mm_cachep;

#define allocate_mm()	(kmem_cache_alloc(mm_cachep, GFP_KERNEL))

int arch_task_struct_size

static unsigned long default_dump_filter = MMF_DUMP_FILTER_DEFAULT;

const struct file_operations pidfd_fops = {
	.release = pidfd_release,
	.poll = pidfd_poll,
#ifdef CONFIG_PROC_FS
	.show_fdinfo = pidfd_show_fdinfo,
#endif
};

static __latent_entropy struct


static void pidfd_show_fdinfo(struct seq_file *m, struct file *f)
{
	struct pid *pid = f->private_data;
	struct pid_namespace *ns;
	pid_t nr = -1;

	if (likely(pid_has_task(pid, PIDTYPE_PID))) {
		ns = proc_pid_ns(file_inode(m->file)->i_sb);
		nr = pid_nr_ns(pid, ns);
	}

	seq_put_decimal_ll(m, "Pid:\t", nr);

#ifdef CONFIG_PID_NS
	seq_put_decimal_ll(m, "\nNSpid:\t", nr);
	if (nr > 0) {
		int i;

		/* If nr is non-zero it means that 'pid' is valid and that
		 * ns, i.e. the pid namespace associated with the procfs
		 * instance, is in the pid namespace hierarchy of pid.
		 * Start at one below the already printed level.
		 */
		for (i = ns->level + 1; i <= pid->level; i++)
			seq_put_decimal_ll(m, "\t", pid->numbers[i].nr);
	}
#endif
	seq_putc(m, '\n');
}

int nr_threads;

static int max_threads;

static const char * const resident_page_types[] = {
	NAMED_ARRAY_INDEX(MM_FILEPAGES),
	NAMED_ARRAY_INDEX(MM_ANONPAGES),
	NAMED_ARRAY_INDEX(MM_SWAPENTS),
	NAMED_ARRAY_INDEX(MM_SHMEMPAGES),
};

static struct kmem_cache *task_struct_cachep;

static DEFINE_PER_CPU(struct vm_struct *, cached_stacks[NR_CACHED_STACKS]);

static struct kmem_cache *thread_stack_cache;

static struct kmem_cache *signal_cachep;

struct kmem_cache *sighand_cachep;

struct kmem_cache *files_cachep;

struct kmem_cache *fs_cachep;

static struct kmem_cache *vm_area_cachep;

static struct kmem_cache *mm_cachep;

void __init

int arch_task_struct_size

static unsigned long default_dump_filter = MMF_DUMP_FILTER_DEFAULT;

const struct file_operations pidfd_fops = {
	.release = pidfd_release,
	.poll = pidfd_poll,
#ifdef CONFIG_PROC_FS
	.show_fdinfo = pidfd_show_fdinfo,
#endif
};

static __latent_entropy struct


static void posix_cpu_timers_init_group(struct signal_struct *sig)
{
	struct posix_cputimers *pct = &sig->posix_cputimers;
	unsigned long cpu_limit;

	cpu_limit = READ_ONCE(sig->rlim[RLIMIT_CPU].rlim_cur);
	posix_cputimers_group_init(pct, cpu_limit);
}

unsigned long total_forks;

static int max_threads;

static const char * const resident_page_types[] = {
	NAMED_ARRAY_INDEX(MM_FILEPAGES),
	NAMED_ARRAY_INDEX(MM_ANONPAGES),
	NAMED_ARRAY_INDEX(MM_SWAPENTS),
	NAMED_ARRAY_INDEX(MM_SHMEMPAGES),
};

DEFINE_PER_CPU(unsigned long, process_counts) = 0;

static struct kmem_cache *task_struct_cachep;

static DEFINE_PER_CPU(struct vm_struct *, cached_stacks[NR_CACHED_STACKS]);

static struct kmem_cache *thread_stack_cache;

static struct kmem_cache *signal_cachep;

struct kmem_cache *sighand_cachep;

struct kmem_cache *files_cachep;

struct kmem_cache *fs_cachep;

static struct kmem_cache *vm_area_cachep;

static struct kmem_cache *mm_cachep;

void __init

static unsigned long default_dump_filter = MMF_DUMP_FILTER_DEFAULT;

const struct file_operations pidfd_fops = {
	.release = pidfd_release,
	.poll = pidfd_poll,
#ifdef CONFIG_PROC_FS
	.show_fdinfo = pidfd_show_fdinfo,
#endif
};

static __latent_entropy struct


static int wait_for_vfork_done(struct task_struct *child,
				struct completion *vfork)
{
	int killed;

	freezer_do_not_count();
	cgroup_enter_frozen();
	killed = wait_for_completion_killable(vfork);
	cgroup_leave_frozen(false);
	freezer_count();

	if (killed) {
		task_lock(child);
		child->vfork_done = NULL;
		task_unlock(child);
	}

	put_task_struct(child);
	return killed;
}


void __init proc_caches_init(void)
{
	unsigned int mm_size;

	sighand_cachep = kmem_cache_create("sighand_cache",
			sizeof(struct sighand_struct), 0,
			SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_TYPESAFE_BY_RCU|
			SLAB_ACCOUNT, sighand_ctor);
	signal_cachep = kmem_cache_create("signal_cache",
			sizeof(struct signal_struct), 0,
			SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_ACCOUNT,
			NULL);
	files_cachep = kmem_cache_create("files_cache",
			sizeof(struct files_struct), 0,
			SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_ACCOUNT,
			NULL);
	fs_cachep = kmem_cache_create("fs_cache",
			sizeof(struct fs_struct), 0,
			SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_ACCOUNT,
			NULL);

	/*
	 * The mm_cpumask is located at the end of mm_struct, and is
	 * dynamically sized based on the maximum CPU number this system
	 * can have, taking hotplug into account (nr_cpu_ids).
	 */
	mm_size = sizeof(struct mm_struct) + cpumask_size();

	mm_cachep = kmem_cache_create_usercopy("mm_struct",
			mm_size, ARCH_MIN_MMSTRUCT_ALIGN,
			SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_ACCOUNT,
			offsetof(struct mm_struct, saved_auxv),
			sizeof_field(struct mm_struct, saved_auxv),
			NULL);
	vm_area_cachep = KMEM_CACHE(vm_area_struct, SLAB_PANIC|SLAB_ACCOUNT);
	mmap_init();
	nsproxy_cache_init();
}

unsigned long total_forks;

int nr_threads;

static int max_threads;

DEFINE_PER_CPU(unsigned long, process_counts) = 0;

static struct kmem_cache *task_struct_cachep;

static DEFINE_PER_CPU(struct vm_struct *, cached_stacks[NR_CACHED_STACKS]);

static struct kmem_cache *thread_stack_cache;

static struct kmem_cache *signal_cachep;

struct kmem_cache *sighand_cachep;

struct kmem_cache *files_cachep;

struct kmem_cache *fs_cachep;

static struct kmem_cache *vm_area_cachep;

static struct kmem_cache *mm_cachep;

#define allocate_mm()	(kmem_cache_alloc(mm_cachep, GFP_KERNEL))

#define free_mm(mm)	(kmem_cache_free(mm_cachep, (mm)))

void __init

int arch_task_struct_size

static unsigned long default_dump_filter = MMF_DUMP_FILTER_DEFAULT;

const struct file_operations pidfd_fops = {
	.release = pidfd_release,
	.poll = pidfd_poll,
#ifdef CONFIG_PROC_FS
	.show_fdinfo = pidfd_show_fdinfo,
#endif
};

static __latent_entropy struct

#define ARCH_MIN_MMSTRUCT_ALIGN 0


struct mm_struct *copy_init_mm(void)
{
	return dup_mm(NULL, &init_mm);
}


static void mmdrop_async_fn(struct work_struct *work)
{
	struct mm_struct *mm;

	mm = container_of(work, struct mm_struct, async_put_work);
	__mmdrop(mm);
}


static struct mm_struct *dup_mm(struct task_struct *tsk,
				struct mm_struct *oldmm)
{
	struct mm_struct *mm;
	int err;

	mm = allocate_mm();
	if (!mm)
		goto fail_nomem;

	memcpy(mm, oldmm, sizeof(*mm));

	if (!mm_init(mm, tsk, mm->user_ns))
		goto fail_nomem;

	err = dup_mmap(mm, oldmm);
	if (err)
		goto free_pt;

	mm->hiwater_rss = get_mm_rss(mm);
	mm->hiwater_vm = mm->total_vm;

	if (mm->binfmt && !try_module_get(mm->binfmt->module))
		goto free_pt;

	return mm;

free_pt:
	/* don't put binfmt in mmput, we haven't got module yet */
	mm->binfmt = NULL;
	mm_init_owner(mm, NULL);
	mmput(mm);

fail_nomem:
	return NULL;
}


static __always_inline void mm_clear_owner(struct mm_struct *mm,
					   struct task_struct *p)
{
#ifdef CONFIG_MEMCG
	if (mm->owner == p)
		WRITE_ONCE(mm->owner, NULL);
#endif
}


void put_task_stack(struct task_struct *tsk)
{
	if (refcount_dec_and_test(&tsk->stack_refcount))
		release_task_stack(tsk);
}


void __weak arch_release_task_struct(struct task_struct *tsk)
{
}


static inline bool clone3_stack_valid(struct kernel_clone_args *kargs)
{
	if (kargs->stack == 0) {
		if (kargs->stack_size > 0)
			return false;
	} else {
		if (kargs->stack_size == 0)
			return false;

		if (!access_ok((void __user *)kargs->stack, kargs->stack_size))
			return false;

#if !defined(CONFIG_STACK_GROWSUP) && !defined(CONFIG_IA64)
		kargs->stack += kargs->stack_size;
#endif
	}

	return true;
}


static void copy_seccomp(struct task_struct *p)
{
#ifdef CONFIG_SECCOMP
	/*
	 * Must be called with sighand->lock held, which is common to
	 * all threads in the group. Holding cred_guard_mutex is not
	 * needed because this new task is not yet running and cannot
	 * be racing exec.
	 */
	assert_spin_locked(&current->sighand->siglock);

	/* Ref-count the new filter user, and assign it. */
	get_seccomp_filter(current);
	p->seccomp = current->seccomp;

	/*
	 * Explicitly enable no_new_privs here in case it got set
	 * between the task_struct being duplicated and holding the
	 * sighand lock. The seccomp state and nnp must be in sync.
	 */
	if (task_no_new_privs(current))
		task_set_no_new_privs(p);

	/*
	 * If the parent gained a seccomp mode after copying thread
	 * flags and between before we held the sighand lock, we have
	 * to manually enable the seccomp thread flag here.
	 */
	if (p->seccomp.mode != SECCOMP_MODE_DISABLED)
		set_tsk_thread_flag(p, TIF_SECCOMP);
#endif
}


static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
{
	struct signal_struct *sig;

	if (clone_flags & CLONE_THREAD)
		return 0;

	sig = kmem_cache_zalloc(signal_cachep, GFP_KERNEL);
	tsk->signal = sig;
	if (!sig)
		return -ENOMEM;

	sig->nr_threads = 1;
	atomic_set(&sig->live, 1);
	refcount_set(&sig->sigcnt, 1);

	/* list_add(thread_node, thread_head) without INIT_LIST_HEAD() */
	sig->thread_head = (struct list_head)LIST_HEAD_INIT(tsk->thread_node);
	tsk->thread_node = (struct list_head)LIST_HEAD_INIT(sig->thread_head);

	init_waitqueue_head(&sig->wait_chldexit);
	sig->curr_target = tsk;
	init_sigpending(&sig->shared_pending);
	INIT_HLIST_HEAD(&sig->multiprocess);
	seqlock_init(&sig->stats_lock);
	prev_cputime_init(&sig->prev_cputime);

#ifdef CONFIG_POSIX_TIMERS
	INIT_LIST_HEAD(&sig->posix_timers);
	hrtimer_init(&sig->real_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
	sig->real_timer.function = it_real_fn;
#endif

	task_lock(current->group_leader);
	memcpy(sig->rlim, current->signal->rlim, sizeof sig->rlim);
	task_unlock(current->group_leader);

	posix_cpu_timers_init_group(sig);

	tty_audit_fork(sig);
	sched_autogroup_fork(sig);

	sig->oom_score_adj = current->signal->oom_score_adj;
	sig->oom_score_adj_min = current->signal->oom_score_adj_min;

	mutex_init(&sig->cred_guard_mutex);
	mutex_init(&sig->exec_update_mutex);

	return 0;
}

unsigned long total_forks;

int nr_threads;

static int max_threads;

static const char * const resident_page_types[] = {
	NAMED_ARRAY_INDEX(MM_FILEPAGES),
	NAMED_ARRAY_INDEX(MM_ANONPAGES),
	NAMED_ARRAY_INDEX(MM_SWAPENTS),
	NAMED_ARRAY_INDEX(MM_SHMEMPAGES),
};

DEFINE_PER_CPU(unsigned long, process_counts) = 0;

static struct kmem_cache *task_struct_cachep;

static DEFINE_PER_CPU(struct vm_struct *, cached_stacks[NR_CACHED_STACKS]);

static struct kmem_cache *thread_stack_cache;

static struct kmem_cache *signal_cachep;

struct kmem_cache *sighand_cachep;

struct kmem_cache *files_cachep;

struct kmem_cache *fs_cachep;

static struct kmem_cache *vm_area_cachep;

static struct kmem_cache *mm_cachep;

#define allocate_mm()	(kmem_cache_alloc(mm_cachep, GFP_KERNEL))

int arch_task_struct_size

static unsigned long default_dump_filter = MMF_DUMP_FILTER_DEFAULT;

const struct file_operations pidfd_fops = {
	.release = pidfd_release,
	.poll = pidfd_poll,
#ifdef CONFIG_PROC_FS
	.show_fdinfo = pidfd_show_fdinfo,
#endif
};

static __latent_entropy struct


int lockdep_tasklist_lock_is_held(void)
{
	return lockdep_is_held(&tasklist_lock);
}

int nr_threads;

static int max_threads;

__cacheline_aligned DEFINE_RWLOCK(tasklist_lock);

void __init

int arch_task_struct_size


static __latent_entropy int dup_mmap(struct mm_struct *mm,
					struct mm_struct *oldmm)
{
	struct vm_area_struct *mpnt, *tmp, *prev, **pprev;
	struct rb_node **rb_link, *rb_parent;
	int retval;
	unsigned long charge;
	LIST_HEAD(uf);

	uprobe_start_dup_mmap();
	if (mmap_write_lock_killable(oldmm)) {
		retval = -EINTR;
		goto fail_uprobe_end;
	}
	flush_cache_dup_mm(oldmm);
	uprobe_dup_mmap(oldmm, mm);
	/*
	 * Not linked in yet - no deadlock potential:
	 */
	mmap_write_lock_nested(mm, SINGLE_DEPTH_NESTING);

	/* No ordering required: file already has been exposed. */
	RCU_INIT_POINTER(mm->exe_file, get_mm_exe_file(oldmm));

	mm->total_vm = oldmm->total_vm;
	mm->data_vm = oldmm->data_vm;
	mm->exec_vm = oldmm->exec_vm;
	mm->stack_vm = oldmm->stack_vm;

	rb_link = &mm->mm_rb.rb_node;
	rb_parent = NULL;
	pprev = &mm->mmap;
	retval = ksm_fork(mm, oldmm);
	if (retval)
		goto out;
	retval = khugepaged_fork(mm, oldmm);
	if (retval)
		goto out;

	prev = NULL;
	for (mpnt = oldmm->mmap; mpnt; mpnt = mpnt->vm_next) {
		struct file *file;

		if (mpnt->vm_flags & VM_DONTCOPY) {
			vm_stat_account(mm, mpnt->vm_flags, -vma_pages(mpnt));
			continue;
		}
		charge = 0;
		/*
		 * Don't duplicate many vmas if we've been oom-killed (for
		 * example)
		 */
		if (fatal_signal_pending(current)) {
			retval = -EINTR;
			goto out;
		}
		if (mpnt->vm_flags & VM_ACCOUNT) {
			unsigned long len = vma_pages(mpnt);

			if (security_vm_enough_memory_mm(oldmm, len)) /* sic */
				goto fail_nomem;
			charge = len;
		}
		tmp = vm_area_dup(mpnt);
		if (!tmp)
			goto fail_nomem;
		retval = vma_dup_policy(mpnt, tmp);
		if (retval)
			goto fail_nomem_policy;
		tmp->vm_mm = mm;
		retval = dup_userfaultfd(tmp, &uf);
		if (retval)
			goto fail_nomem_anon_vma_fork;
		if (tmp->vm_flags & VM_WIPEONFORK) {
			/*
			 * VM_WIPEONFORK gets a clean slate in the child.
			 * Don't prepare anon_vma until fault since we don't
			 * copy page for current vma.
			 */
			tmp->anon_vma = NULL;
		} else if (anon_vma_fork(tmp, mpnt))
			goto fail_nomem_anon_vma_fork;
		tmp->vm_flags &= ~(VM_LOCKED | VM_LOCKONFAULT);
		file = tmp->vm_file;
		if (file) {
			struct inode *inode = file_inode(file);
			struct address_space *mapping = file->f_mapping;

			get_file(file);
			if (tmp->vm_flags & VM_DENYWRITE)
				put_write_access(inode);
			i_mmap_lock_write(mapping);
			if (tmp->vm_flags & VM_SHARED)
				mapping_allow_writable(mapping);
			flush_dcache_mmap_lock(mapping);
			/* insert tmp into the share list, just after mpnt */
			vma_interval_tree_insert_after(tmp, mpnt,
					&mapping->i_mmap);
			flush_dcache_mmap_unlock(mapping);
			i_mmap_unlock_write(mapping);
		}

		/*
		 * Clear hugetlb-related page reserves for children. This only
		 * affects MAP_PRIVATE mappings. Faults generated by the child
		 * are not guaranteed to succeed, even if read-only
		 */
		if (is_vm_hugetlb_page(tmp))
			reset_vma_resv_huge_pages(tmp);

		/*
		 * Link in the new vma and copy the page table entries.
		 */
		*pprev = tmp;
		pprev = &tmp->vm_next;
		tmp->vm_prev = prev;
		prev = tmp;

		__vma_link_rb(mm, tmp, rb_link, rb_parent);
		rb_link = &tmp->vm_rb.rb_right;
		rb_parent = &tmp->vm_rb;

		mm->map_count++;
		if (!(tmp->vm_flags & VM_WIPEONFORK))
			retval = copy_page_range(tmp, mpnt);

		if (tmp->vm_ops && tmp->vm_ops->open)
			tmp->vm_ops->open(tmp);

		if (retval)
			goto out;
	}
	/* a new mm has just been created */
	retval = arch_dup_mmap(oldmm, mm);
out:
	mmap_write_unlock(mm);
	flush_tlb_mm(oldmm);
	mmap_write_unlock(oldmm);
	dup_userfaultfd_complete(&uf);
fail_uprobe_end:
	uprobe_end_dup_mmap();
	return retval;
fail_nomem_anon_vma_fork:
	mpol_put(vma_policy(tmp));
fail_nomem_policy:
	vm_area_free(tmp);
fail_nomem:
	retval = -ENOMEM;
	vm_unacct_memory(charge);
	goto out;
}

unsigned long total_forks;

int nr_threads;

static int max_threads;

static const char * const resident_page_types[] = {
	NAMED_ARRAY_INDEX(MM_FILEPAGES),
	NAMED_ARRAY_INDEX(MM_ANONPAGES),
	NAMED_ARRAY_INDEX(MM_SWAPENTS),
	NAMED_ARRAY_INDEX(MM_SHMEMPAGES),
};

DEFINE_PER_CPU(unsigned long, process_counts) = 0;

static struct kmem_cache *task_struct_cachep;

static DEFINE_PER_CPU(struct vm_struct *, cached_stacks[NR_CACHED_STACKS]);

static struct kmem_cache *thread_stack_cache;

static struct kmem_cache *signal_cachep;

struct kmem_cache *sighand_cachep;

struct kmem_cache *files_cachep;

struct kmem_cache *fs_cachep;

static struct kmem_cache *vm_area_cachep;

static struct kmem_cache *mm_cachep;

int arch_task_struct_size

static unsigned long default_dump_filter = MMF_DUMP_FILTER_DEFAULT;

const struct file_operations pidfd_fops = {
	.release = pidfd_release,
	.poll = pidfd_poll,
#ifdef CONFIG_PROC_FS
	.show_fdinfo = pidfd_show_fdinfo,
#endif
};

static __latent_entropy struct


struct file *get_task_exe_file(struct task_struct *task)
{
	struct file *exe_file = NULL;
	struct mm_struct *mm;

	task_lock(task);
	mm = task->mm;
	if (mm) {
		if (!(task->flags & PF_KTHREAD))
			exe_file = get_mm_exe_file(mm);
	}
	task_unlock(task);
	return exe_file;
}


static unsigned long *alloc_thread_stack_node(struct task_struct *tsk, int node)
{
#ifdef CONFIG_VMAP_STACK
	void *stack;
	int i;

	for (i = 0; i < NR_CACHED_STACKS; i++) {
		struct vm_struct *s;

		s = this_cpu_xchg(cached_stacks[i], NULL);

		if (!s)
			continue;

		/* Clear the KASAN shadow of the stack. */
		kasan_unpoison_shadow(s->addr, THREAD_SIZE);

		/* Clear stale pointers from reused stack. */
		memset(s->addr, 0, THREAD_SIZE);

		tsk->stack_vm_area = s;
		tsk->stack = s->addr;
		return s->addr;
	}

	/*
	 * Allocated stacks are cached and later reused by new threads,
	 * so memcg accounting is performed manually on assigning/releasing
	 * stacks to tasks. Drop __GFP_ACCOUNT.
	 */
	stack = __vmalloc_node_range(THREAD_SIZE, THREAD_ALIGN,
				     VMALLOC_START, VMALLOC_END,
				     THREADINFO_GFP & ~__GFP_ACCOUNT,
				     PAGE_KERNEL,
				     0, node, __builtin_return_address(0));

	/*
	 * We can't call find_vm_area() in interrupt context, and
	 * free_thread_stack() can be called in interrupt context,
	 * so cache the vm_struct.
	 */
	if (stack) {
		tsk->stack_vm_area = find_vm_area(stack);
		tsk->stack = stack;
	}
	return stack;
#else
	struct page *page = alloc_pages_node(node, THREADINFO_GFP,
					     THREAD_SIZE_ORDER);

	if (likely(page)) {
		tsk->stack = kasan_reset_tag(page_address(page));
		return tsk->stack;
	}
	return NULL;
#endif
}

unsigned long total_forks;

int nr_threads;

static int max_threads;

static const char * const resident_page_types[] = {
	NAMED_ARRAY_INDEX(MM_FILEPAGES),
	NAMED_ARRAY_INDEX(MM_ANONPAGES),
	NAMED_ARRAY_INDEX(MM_SWAPENTS),
	NAMED_ARRAY_INDEX(MM_SHMEMPAGES),
};

DEFINE_PER_CPU(unsigned long, process_counts) = 0;

static struct kmem_cache *task_struct_cachep;

#define NR_CACHED_STACKS 2

static DEFINE_PER_CPU(struct vm_struct *, cached_stacks[NR_CACHED_STACKS]);

static struct kmem_cache *thread_stack_cache;

static struct kmem_cache *signal_cachep;

struct kmem_cache *sighand_cachep;

struct kmem_cache *files_cachep;

struct kmem_cache *fs_cachep;

static struct kmem_cache *vm_area_cachep;

static struct kmem_cache *mm_cachep;

void __init

int arch_task_struct_size

static unsigned long default_dump_filter = MMF_DUMP_FILTER_DEFAULT;

const struct file_operations pidfd_fops = {
	.release = pidfd_release,
	.poll = pidfd_poll,
#ifdef CONFIG_PROC_FS
	.show_fdinfo = pidfd_show_fdinfo,
#endif
};

static __latent_entropy struct


void __init __weak arch_task_cache_init(void) { }


void set_mm_exe_file(struct mm_struct *mm, struct file *new_exe_file)
{
	struct file *old_exe_file;

	/*
	 * It is safe to dereference the exe_file without RCU as
	 * this function is only called if nobody else can access
	 * this mm -- see comment above for justification.
	 */
	old_exe_file = rcu_dereference_raw(mm->exe_file);

	if (new_exe_file)
		get_file(new_exe_file);
	rcu_assign_pointer(mm->exe_file, new_exe_file);
	if (old_exe_file)
		fput(old_exe_file);
}


static int copy_mm(unsigned long clone_flags, struct task_struct *tsk)
{
	struct mm_struct *mm, *oldmm;
	int retval;

	tsk->min_flt = tsk->maj_flt = 0;
	tsk->nvcsw = tsk->nivcsw = 0;
#ifdef CONFIG_DETECT_HUNG_TASK
	tsk->last_switch_count = tsk->nvcsw + tsk->nivcsw;
	tsk->last_switch_time = 0;
#endif

	tsk->mm = NULL;
	tsk->active_mm = NULL;

	/*
	 * Are we cloning a kernel thread?
	 *
	 * We need to steal a active VM for that..
	 */
	oldmm = current->mm;
	if (!oldmm)
		return 0;

	/* initialize the new vmacache entries */
	vmacache_flush(tsk);

	if (clone_flags & CLONE_VM) {
		mmget(oldmm);
		mm = oldmm;
		goto good_mm;
	}

	retval = -ENOMEM;
	mm = dup_mm(tsk, current->mm);
	if (!mm)
		goto fail_nomem;

good_mm:
	tsk->mm = mm;
	tsk->active_mm = mm;
	return 0;

fail_nomem:
	return retval;
}


struct mm_struct *mm_alloc(void)
{
	struct mm_struct *mm;

	mm = allocate_mm();
	if (!mm)
		return NULL;

	memset(mm, 0, sizeof(*mm));
	return mm_init(mm, current, current_user_ns());
}


static void mmput_async_fn(struct work_struct *work)
{
	struct mm_struct *mm = container_of(work, struct mm_struct,
					    async_put_work);

	__mmput(mm);
}


struct file *get_mm_exe_file(struct mm_struct *mm)
{
	struct file *exe_file;

	rcu_read_lock();
	exe_file = rcu_dereference(mm->exe_file);
	if (exe_file && !get_file_rcu(exe_file))
		exe_file = NULL;
	rcu_read_unlock();
	return exe_file;
}


static void mm_init_owner(struct mm_struct *mm, struct task_struct *p)
{
#ifdef CONFIG_MEMCG
	mm->owner = p;
#endif
}


void exit_mm_release(struct task_struct *tsk, struct mm_struct *mm)
{
	futex_exit_release(tsk);
	mm_release(tsk, mm);
}


UINT rdpgfx_read_header(wStream* s, RDPGFX_HEADER* header)
{
	if (Stream_GetRemainingLength(s) < 8)
	{
		WLog_ERR(TAG, "calloc failed!");
		return CHANNEL_RC_NO_MEMORY;
	}

	Stream_Read_UINT16(s, header->cmdId);     /* cmdId (2 bytes) */
	Stream_Read_UINT16(s, header->flags);     /* flags (2 bytes) */
	Stream_Read_UINT32(s, header->pduLength); /* pduLength (4 bytes) */
	return CHANNEL_RC_OK;
}

Fixed input sanitation in rdpgfx_recv_solid_fill_pdu

The input rectangle must be checked for plausibility.

Thanks to Sunglin and HuanGMz of the Knownsec 404 security team and pangzi of pwnzen


UINT rdpgfx_write_header(wStream* s, const RDPGFX_HEADER* header)
{
	Stream_Write_UINT16(s, header->cmdId);     /* cmdId (2 bytes) */
	Stream_Write_UINT16(s, header->flags);     /* flags (2 bytes) */
	Stream_Write_UINT32(s, header->pduLength); /* pduLength (4 bytes) */
	return CHANNEL_RC_OK;
}

static const char* RDPGFX_CMDID_STRINGS[] = { "RDPGFX_CMDID_UNUSED_0000",
	                                          "RDPGFX_CMDID_WIRETOSURFACE_1",
	                                          "RDPGFX_CMDID_WIRETOSURFACE_2",
	                                          "RDPGFX_CMDID_DELETEENCODINGCONTEXT",
	                                          "RDPGFX_CMDID_SOLIDFILL",
	                                          "RDPGFX_CMDID_SURFACETOSURFACE",
	                                          "RDPGFX_CMDID_SURFACETOCACHE",
	                                          "RDPGFX_CMDID_CACHETOSURFACE",
	                                          "RDPGFX_CMDID_EVICTCACHEENTRY",
	                                          "RDPGFX_CMDID_CREATESURFACE",
	                                          "RDPGFX_CMDID_DELETESURFACE",
	                                          "RDPGFX_CMDID_STARTFRAME",
	                                          "RDPGFX_CMDID_ENDFRAME",
	                                          "RDPGFX_CMDID_FRAMEACKNOWLEDGE",
	                                          "RDPGFX_CMDID_RESETGRAPHICS",
	                                          "RDPGFX_CMDID_MAPSURFACETOOUTPUT",
	                                          "RDPGFX_CMDID_CACHEIMPORTOFFER",
	                                          "RDPGFX_CMDID_CACHEIMPORTREPLY",
	                                          "RDPGFX_CMDID_CAPSADVERTISE",
	                                          "RDPGFX_CMDID_CAPSCONFIRM",
	                                          "RDPGFX_CMDID_UNUSED_0014",
	                                          "RDPGFX_CMDID_MAPSURFACETOWINDOW",
	                                          "RDPGFX_CMDID_QOEFRAMEACKNOWLEDGE",
	                                          "RDPGFX_CMDID_MAPSURFACETOSCALEDOUTPUT",
	                                          "RDPGFX_CMDID_MAPSURFACETOSCALEDWINDOW" };


const char* rdpgfx_get_cmd_id_string(UINT16 cmdId)
{
	if (cmdId <= RDPGFX_CMDID_MAPSURFACETOSCALEDWINDOW)
		return RDPGFX_CMDID_STRINGS[cmdId];
	else
		return "RDPGFX_CMDID_UNKNOWN";
}


UINT rdpgfx_write_rect16(wStream* s, const RECTANGLE_16* rect16)
{
	Stream_Write_UINT16(s, rect16->left);   /* left (2 bytes) */
	Stream_Write_UINT16(s, rect16->top);    /* top (2 bytes) */
	Stream_Write_UINT16(s, rect16->right);  /* right (2 bytes) */
	Stream_Write_UINT16(s, rect16->bottom); /* bottom (2 bytes) */
	return CHANNEL_RC_OK;
}


const char* rdpgfx_get_codec_id_string(UINT16 codecId)
{
	switch (codecId)
	{
		case RDPGFX_CODECID_UNCOMPRESSED:
			return "RDPGFX_CODECID_UNCOMPRESSED";

		case RDPGFX_CODECID_CAVIDEO:
			return "RDPGFX_CODECID_CAVIDEO";

		case RDPGFX_CODECID_CLEARCODEC:
			return "RDPGFX_CODECID_CLEARCODEC";

		case RDPGFX_CODECID_PLANAR:
			return "RDPGFX_CODECID_PLANAR";

		case RDPGFX_CODECID_AVC420:
			return "RDPGFX_CODECID_AVC420";

		case RDPGFX_CODECID_AVC444:
			return "RDPGFX_CODECID_AVC444";

		case RDPGFX_CODECID_AVC444v2:
			return "RDPGFX_CODECID_AVC444v2";

		case RDPGFX_CODECID_ALPHA:
			return "RDPGFX_CODECID_ALPHA";

		case RDPGFX_CODECID_CAPROGRESSIVE:
			return "RDPGFX_CODECID_CAPROGRESSIVE";

		case RDPGFX_CODECID_CAPROGRESSIVE_V2:
			return "RDPGFX_CODECID_CAPROGRESSIVE_V2";
	}

	return "RDPGFX_CODECID_UNKNOWN";
}


UINT rdpgfx_write_color32(wStream* s, const RDPGFX_COLOR32* color32)
{
	Stream_Write_UINT8(s, color32->B);  /* B (1 byte) */
	Stream_Write_UINT8(s, color32->G);  /* G (1 byte) */
	Stream_Write_UINT8(s, color32->R);  /* R (1 byte) */
	Stream_Write_UINT8(s, color32->XA); /* XA (1 byte) */
	return CHANNEL_RC_OK;
}


UINT rdpgfx_write_point16(wStream* s, const RDPGFX_POINT16* point16)
{
	Stream_Write_UINT16(s, point16->x); /* x (2 bytes) */
	Stream_Write_UINT16(s, point16->y); /* y (2 bytes) */
	return CHANNEL_RC_OK;
}


UINT rdpgfx_read_color32(wStream* s, RDPGFX_COLOR32* color32)
{
	if (Stream_GetRemainingLength(s) < 4)
	{
		WLog_ERR(TAG, "not enough data!");
		return ERROR_INVALID_DATA;
	}

	Stream_Read_UINT8(s, color32->B);  /* B (1 byte) */
	Stream_Read_UINT8(s, color32->G);  /* G (1 byte) */
	Stream_Read_UINT8(s, color32->R);  /* R (1 byte) */
	Stream_Read_UINT8(s, color32->XA); /* XA (1 byte) */
	return CHANNEL_RC_OK;
}


UINT rdpgfx_read_rect16(wStream* s, RECTANGLE_16* rect16)
{
	if (Stream_GetRemainingLength(s) < 8)
	{
		WLog_ERR(TAG, "not enough data!");
		return ERROR_INVALID_DATA;
	}

	Stream_Read_UINT16(s, rect16->left);   /* left (2 bytes) */
	Stream_Read_UINT16(s, rect16->top);    /* top (2 bytes) */
	Stream_Read_UINT16(s, rect16->right);  /* right (2 bytes) */
	Stream_Read_UINT16(s, rect16->bottom); /* bottom (2 bytes) */
	if (rect16->left >= rect16->right)
		return ERROR_INVALID_DATA;
	if (rect16->top >= rect16->bottom)
		return ERROR_INVALID_DATA;
	return CHANNEL_RC_OK;
}


UINT rdpgfx_read_point16(wStream* s, RDPGFX_POINT16* pt16)
{
	if (Stream_GetRemainingLength(s) < 4)
	{
		WLog_ERR(TAG, "not enough data!");
		return ERROR_INVALID_DATA;
	}

	Stream_Read_UINT16(s, pt16->x); /* x (2 bytes) */
	Stream_Read_UINT16(s, pt16->y); /* y (2 bytes) */
	return CHANNEL_RC_OK;
}


BOOL update_recv_play_sound(rdpUpdate* update, wStream* s)
{
	PLAY_SOUND_UPDATE play_sound;

	if (!update_read_play_sound(s, &play_sound))
		return FALSE;

	return IFCALLRESULT(FALSE, update->PlaySound, update->context, &play_sound);
}

Fixed oob read in update_recv

properly use update_type_to_string to print update type.
Thanks to hac425 CVE-2020-11019


POINTER_CACHED_UPDATE* update_read_pointer_cached(rdpUpdate* update, wStream* s)
{
	POINTER_CACHED_UPDATE* pointer = calloc(1, sizeof(POINTER_CACHED_UPDATE));

	if (!pointer)
		goto fail;

	if (Stream_GetRemainingLength(s) < 2)
		goto fail;

	Stream_Read_UINT16(s, pointer->cacheIndex); /* cacheIndex (2 bytes) */
	return pointer;
fail:
	free_pointer_cached_update(update->context, pointer);
	return NULL;
}


void update_register_server_callbacks(rdpUpdate* update)
{
	update->BeginPaint = _update_begin_paint;
	update->EndPaint = _update_end_paint;
	update->SetBounds = update_set_bounds;
	update->Synchronize = update_send_synchronize;
	update->DesktopResize = update_send_desktop_resize;
	update->BitmapUpdate = update_send_bitmap_update;
	update->SurfaceBits = update_send_surface_bits;
	update->SurfaceFrameMarker = update_send_surface_frame_marker;
	update->SurfaceCommand = update_send_surface_command;
	update->SurfaceFrameBits = update_send_surface_frame_bits;
	update->PlaySound = update_send_play_sound;
	update->SetKeyboardIndicators = update_send_set_keyboard_indicators;
	update->SetKeyboardImeStatus = update_send_set_keyboard_ime_status;
	update->SaveSessionInfo = rdp_send_save_session_info;
	update->ServerStatusInfo = rdp_send_server_status_info;
	update->primary->DstBlt = update_send_dstblt;
	update->primary->PatBlt = update_send_patblt;
	update->primary->ScrBlt = update_send_scrblt;
	update->primary->OpaqueRect = update_send_opaque_rect;
	update->primary->LineTo = update_send_line_to;
	update->primary->MemBlt = update_send_memblt;
	update->primary->GlyphIndex = update_send_glyph_index;
	update->secondary->CacheBitmap = update_send_cache_bitmap;
	update->secondary->CacheBitmapV2 = update_send_cache_bitmap_v2;
	update->secondary->CacheBitmapV3 = update_send_cache_bitmap_v3;
	update->secondary->CacheColorTable = update_send_cache_color_table;
	update->secondary->CacheGlyph = update_send_cache_glyph;
	update->secondary->CacheGlyphV2 = update_send_cache_glyph_v2;
	update->secondary->CacheBrush = update_send_cache_brush;
	update->altsec->CreateOffscreenBitmap = update_send_create_offscreen_bitmap_order;
	update->altsec->SwitchSurface = update_send_switch_surface_order;
	update->pointer->PointerSystem = update_send_pointer_system;
	update->pointer->PointerPosition = update_send_pointer_position;
	update->pointer->PointerColor = update_send_pointer_color;
	update->pointer->PointerLarge = update_send_pointer_large;
	update->pointer->PointerNew = update_send_pointer_new;
	update->pointer->PointerCached = update_send_pointer_cached;
	update->window->WindowCreate = update_send_window_create;
	update->window->WindowUpdate = update_send_window_update;
	update->window->WindowIcon = update_send_window_icon;
	update->window->WindowCachedIcon = update_send_window_cached_icon;
	update->window->WindowDelete = update_send_window_delete;
	update->window->NotifyIconCreate = update_send_notify_icon_create;
	update->window->NotifyIconUpdate = update_send_notify_icon_update;
	update->window->NotifyIconDelete = update_send_notify_icon_delete;
	update->window->MonitoredDesktop = update_send_monitored_desktop;
	update->window->NonMonitoredDesktop = update_send_non_monitored_desktop;
}

#define TAG FREERDP_TAG("core.update")

static const char* const UPDATE_TYPE_STRINGS[] = { "Orders", "Bitmap", "Palette", "Synchronize" };


static BOOL update_send_pointer_system(rdpContext* context,
                                       const POINTER_SYSTEM_UPDATE* pointer_system)
{
	wStream* s;
	BYTE updateCode;
	rdpRdp* rdp = context->rdp;
	BOOL ret;
	s = fastpath_update_pdu_init(rdp->fastpath);

	if (!s)
		return FALSE;

	if (pointer_system->type == SYSPTR_NULL)
		updateCode = FASTPATH_UPDATETYPE_PTR_NULL;
	else
		updateCode = FASTPATH_UPDATETYPE_PTR_DEFAULT;

	ret = fastpath_send_update_pdu(rdp->fastpath, updateCode, s, FALSE);
	Stream_Release(s);
	return ret;
}


static BOOL update_send_patblt(rdpContext* context, PATBLT_ORDER* patblt)
{
	wStream* s;
	size_t offset;
	int headerLength;
	ORDER_INFO orderInfo;
	rdpUpdate* update = context->update;
	headerLength = update_prepare_order_info(context, &orderInfo, ORDER_TYPE_PATBLT);
	update_check_flush(context, headerLength + update_approximate_patblt_order(&orderInfo, patblt));
	s = update->us;

	if (!s)
		return FALSE;

	offset = Stream_GetPosition(s);

	if (!Stream_EnsureRemainingCapacity(s, headerLength))
		return FALSE;

	Stream_Seek(s, headerLength);
	update_write_patblt_order(s, &orderInfo, patblt);
	update_write_order_info(context, s, &orderInfo, offset);
	update->numberOrders++;
	return TRUE;
}


static BOOL update_send_pointer_position(rdpContext* context,
                                         const POINTER_POSITION_UPDATE* pointerPosition)
{
	wStream* s;
	rdpRdp* rdp = context->rdp;
	BOOL ret = FALSE;
	s = fastpath_update_pdu_init(rdp->fastpath);

	if (!s)
		return FALSE;

	if (!Stream_EnsureRemainingCapacity(s, 16))
		goto out_fail;

	Stream_Write_UINT16(s, pointerPosition->xPos); /* xPos (2 bytes) */
	Stream_Write_UINT16(s, pointerPosition->yPos); /* yPos (2 bytes) */
	ret = fastpath_send_update_pdu(rdp->fastpath, FASTPATH_UPDATETYPE_PTR_POSITION, s, FALSE);
out_fail:
	Stream_Release(s);
	return ret;
}


static BOOL update_send_surface_frame_bits(rdpContext* context, const SURFACE_BITS_COMMAND* cmd,
                                           BOOL first, BOOL last, UINT32 frameId)
{
	wStream* s;
	rdpRdp* rdp = context->rdp;
	BOOL ret = FALSE;
	update_force_flush(context);
	s = fastpath_update_pdu_init(rdp->fastpath);

	if (!s)
		return FALSE;

	if (first)
	{
		if (!update_write_surfcmd_frame_marker(s, SURFACECMD_FRAMEACTION_BEGIN, frameId))
			goto out_fail;
	}

	if (!update_write_surfcmd_surface_bits(s, cmd))
		goto out_fail;

	if (last)
	{
		if (!update_write_surfcmd_frame_marker(s, SURFACECMD_FRAMEACTION_END, frameId))
			goto out_fail;
	}

	ret = fastpath_send_update_pdu(rdp->fastpath, FASTPATH_UPDATETYPE_SURFCMDS, s,
	                               cmd->skipCompression);
	update_force_flush(context);
out_fail:
	Stream_Release(s);
	return ret;
}


static BOOL update_send_window_update(rdpContext* context, const WINDOW_ORDER_INFO* orderInfo,
                                      const WINDOW_STATE_ORDER* stateOrder)
{
	return update_send_new_or_existing_window(context, orderInfo, stateOrder);
}

static const char* const UPDATE_TYPE_STRINGS[] = { "Orders", "Bitmap", "Palette", "Synchronize" };


static BOOL update_send_window_cached_icon(rdpContext* context, const WINDOW_ORDER_INFO* orderInfo,
                                           const WINDOW_CACHED_ICON_ORDER* cachedIconOrder)
{
	wStream* s;
	rdpUpdate* update = context->update;
	BYTE controlFlags = ORDER_SECONDARY | (ORDER_TYPE_WINDOW << 2);
	UINT16 orderSize = 14;
	CACHED_ICON_INFO cachedIcon = cachedIconOrder->cachedIcon;

	update_check_flush(context, orderSize);

	s = update->us;
	if (!s)
		return FALSE;

	if (!Stream_EnsureRemainingCapacity(s, orderSize))
		return FALSE;

	/* Write Hdr */
	Stream_Write_UINT8(s, controlFlags);           /* Header (1 byte) */
	Stream_Write_UINT16(s, orderSize);             /* OrderSize (2 bytes) */
	Stream_Write_UINT32(s, orderInfo->fieldFlags); /* FieldsPresentFlags (4 bytes) */
	Stream_Write_UINT32(s, orderInfo->windowId);   /* WindowID (4 bytes) */
	/* Write body */
	Stream_Write_UINT16(s, cachedIcon.cacheEntry); /* CacheEntry (2 bytes) */
	Stream_Write_UINT8(s, cachedIcon.cacheId);     /* CacheId (1 byte) */
	update->numberOrders++;
	return TRUE;
}


static BOOL update_set_bounds(rdpContext* context, const rdpBounds* bounds)
{
	rdpUpdate* update = context->update;
	CopyMemory(&update->previousBounds, &update->currentBounds, sizeof(rdpBounds));

	if (!bounds)
		ZeroMemory(&update->currentBounds, sizeof(rdpBounds));
	else
		CopyMemory(&update->currentBounds, bounds, sizeof(rdpBounds));

	return TRUE;
}

#define TAG FREERDP_TAG("core.update")

static const char* const UPDATE_TYPE_STRINGS[] =
{
	"Orders",
	"Bitmap",
	"Palette",
	"Synchronize"
};


static void update_write_suppress_output(wStream* s, BYTE allow, const RECTANGLE_16* area)
{
	Stream_Write_UINT8(s, allow); /* allowDisplayUpdates (1 byte) */
	/* Use zeros for padding (like mstsc) for compatibility with legacy servers */
	Stream_Zero(s, 3); /* pad3Octets (3 bytes) */

	if (allow > 0)
	{
		Stream_Write_UINT16(s, area->left);   /* left (2 bytes) */
		Stream_Write_UINT16(s, area->top);    /* top (2 bytes) */
		Stream_Write_UINT16(s, area->right);  /* right (2 bytes) */
		Stream_Write_UINT16(s, area->bottom); /* bottom (2 bytes) */
	}
}


static BOOL update_read_play_sound(wStream* s, PLAY_SOUND_UPDATE* play_sound)
{
	if (Stream_GetRemainingLength(s) < 8)
		return FALSE;

	Stream_Read_UINT32(s, play_sound->duration);  /* duration (4 bytes) */
	Stream_Read_UINT32(s, play_sound->frequency); /* frequency (4 bytes) */
	return TRUE;
}


static BOOL update_send_pointer_large(rdpContext* context, const POINTER_LARGE_UPDATE* pointer)
{
	wStream* s;
	rdpRdp* rdp = context->rdp;
	BOOL ret = FALSE;
	s = fastpath_update_pdu_init(rdp->fastpath);

	if (!s)
		return FALSE;

	if (!update_write_pointer_large(s, pointer))
		goto out_fail;

	ret = fastpath_send_update_pdu(rdp->fastpath, FASTPATH_UPDATETYPE_LARGE_POINTER, s, FALSE);
out_fail:
	Stream_Release(s);
	return ret;
}


BOOL update_read_refresh_rect(rdpUpdate* update, wStream* s)
{
	int index;
	BYTE numberOfAreas;
	RECTANGLE_16* areas;

	if (Stream_GetRemainingLength(s) < 4)
		return FALSE;

	Stream_Read_UINT8(s, numberOfAreas);
	Stream_Seek(s, 3); /* pad3Octects */

	if (Stream_GetRemainingLength(s) < ((size_t)numberOfAreas * 4 * 2))
		return FALSE;

	areas = (RECTANGLE_16*)calloc(numberOfAreas, sizeof(RECTANGLE_16));

	if (!areas)
		return FALSE;

	for (index = 0; index < numberOfAreas; index++)
	{
		Stream_Read_UINT16(s, areas[index].left);
		Stream_Read_UINT16(s, areas[index].top);
		Stream_Read_UINT16(s, areas[index].right);
		Stream_Read_UINT16(s, areas[index].bottom);
	}

	if (update->context->settings->RefreshRect)
		IFCALL(update->RefreshRect, update->context, numberOfAreas, areas);
	else
		WLog_Print(update->log, WLOG_WARN, "ignoring refresh rect request from client");

	free(areas);
	return TRUE;
}


static BOOL update_send_cache_brush(rdpContext* context, const CACHE_BRUSH_ORDER* cache_brush)
{
	wStream* s;
	UINT16 flags;
	size_t bm, em, inf;
	int headerLength;
	INT16 orderLength;
	rdpUpdate* update = context->update;
	flags = 0;
	headerLength = 6;
	inf = update_approximate_cache_brush_order(cache_brush, &flags);
	update_check_flush(context, headerLength + inf);
	s = update->us;

	if (!s)
		return FALSE;

	bm = Stream_GetPosition(s);

	if (!Stream_EnsureRemainingCapacity(s, headerLength))
		return FALSE;

	Stream_Seek(s, headerLength);

	if (!update_write_cache_brush_order(s, cache_brush, &flags))
		return FALSE;

	em = Stream_GetPosition(s);
	orderLength = (em - bm) - 13;
	Stream_SetPosition(s, bm);
	Stream_Write_UINT8(s, ORDER_STANDARD | ORDER_SECONDARY); /* controlFlags (1 byte) */
	Stream_Write_UINT16(s, orderLength);                     /* orderLength (2 bytes) */
	Stream_Write_UINT16(s, flags);                           /* extraFlags (2 bytes) */
	Stream_Write_UINT8(s, ORDER_TYPE_CACHE_BRUSH);           /* orderType (1 byte) */
	Stream_SetPosition(s, em);
	update->numberOrders++;
	return TRUE;
}


static BOOL update_send_cache_bitmap_v2(rdpContext* context, CACHE_BITMAP_V2_ORDER* cache_bitmap_v2)
{
	wStream* s;
	size_t bm, em;
	BYTE orderType;
	int headerLength;
	UINT16 extraFlags;
	INT16 orderLength;
	rdpUpdate* update = context->update;
	extraFlags = 0;
	headerLength = 6;
	orderType = cache_bitmap_v2->compressed ? ORDER_TYPE_BITMAP_COMPRESSED_V2
	                                        : ORDER_TYPE_BITMAP_UNCOMPRESSED_V2;

	if (context->settings->NoBitmapCompressionHeader)
		cache_bitmap_v2->flags |= CBR2_NO_BITMAP_COMPRESSION_HDR;

	update_check_flush(context, headerLength +
	                                update_approximate_cache_bitmap_v2_order(
	                                    cache_bitmap_v2, cache_bitmap_v2->compressed, &extraFlags));
	s = update->us;

	if (!s)
		return FALSE;

	bm = Stream_GetPosition(s);

	if (!Stream_EnsureRemainingCapacity(s, headerLength))
		return FALSE;

	Stream_Seek(s, headerLength);

	if (!update_write_cache_bitmap_v2_order(s, cache_bitmap_v2, cache_bitmap_v2->compressed,
	                                        &extraFlags))
		return FALSE;

	em = Stream_GetPosition(s);
	orderLength = (em - bm) - 13;
	Stream_SetPosition(s, bm);
	Stream_Write_UINT8(s, ORDER_STANDARD | ORDER_SECONDARY); /* controlFlags (1 byte) */
	Stream_Write_UINT16(s, orderLength);                     /* orderLength (2 bytes) */
	Stream_Write_UINT16(s, extraFlags);                      /* extraFlags (2 bytes) */
	Stream_Write_UINT8(s, orderType);                        /* orderType (1 byte) */
	Stream_SetPosition(s, em);
	update->numberOrders++;
	return TRUE;
}


POINTER_POSITION_UPDATE* update_read_pointer_position(rdpUpdate* update, wStream* s)
{
	POINTER_POSITION_UPDATE* pointer_position = calloc(1, sizeof(POINTER_POSITION_UPDATE));

	if (!pointer_position)
		goto fail;

	if (Stream_GetRemainingLength(s) < 4)
		goto fail;

	Stream_Read_UINT16(s, pointer_position->xPos); /* xPos (2 bytes) */
	Stream_Read_UINT16(s, pointer_position->yPos); /* yPos (2 bytes) */
	return pointer_position;
fail:
	free_pointer_position_update(update->context, pointer_position);
	return NULL;
}


static void update_write_refresh_rect(wStream* s, BYTE count, const RECTANGLE_16* areas)
{
	int i;
	Stream_Write_UINT8(s, count); /* numberOfAreas (1 byte) */
	Stream_Seek(s, 3);            /* pad3Octets (3 bytes) */

	for (i = 0; i < count; i++)
	{
		Stream_Write_UINT16(s, areas[i].left);   /* left (2 bytes) */
		Stream_Write_UINT16(s, areas[i].top);    /* top (2 bytes) */
		Stream_Write_UINT16(s, areas[i].right);  /* right (2 bytes) */
		Stream_Write_UINT16(s, areas[i].bottom); /* bottom (2 bytes) */
	}
}


static const char* update_type_to_string(UINT16 updateType)
{
	if (updateType >= ARRAYSIZE(UPDATE_TYPE_STRINGS))
		return "UNKNOWN";

	return UPDATE_TYPE_STRINGS[updateType];
}


static BOOL update_send_create_offscreen_bitmap_order(
    rdpContext* context, const CREATE_OFFSCREEN_BITMAP_ORDER* create_offscreen_bitmap)
{
	wStream* s;
	size_t bm, em, inf;
	BYTE orderType;
	BYTE controlFlags;
	int headerLength;
	rdpUpdate* update = context->update;
	headerLength = 1;
	orderType = ORDER_TYPE_CREATE_OFFSCREEN_BITMAP;
	controlFlags = ORDER_SECONDARY | (orderType << 2);
	inf = update_approximate_create_offscreen_bitmap_order(create_offscreen_bitmap);
	update_check_flush(context, headerLength + inf);
	s = update->us;

	if (!s)
		return FALSE;

	bm = Stream_GetPosition(s);

	if (!Stream_EnsureRemainingCapacity(s, headerLength))
		return FALSE;

	Stream_Seek(s, headerLength);

	if (!update_write_create_offscreen_bitmap_order(s, create_offscreen_bitmap))
		return FALSE;

	em = Stream_GetPosition(s);
	Stream_SetPosition(s, bm);
	Stream_Write_UINT8(s, controlFlags); /* controlFlags (1 byte) */
	Stream_SetPosition(s, em);
	update->numberOrders++;
	return TRUE;
}


static BOOL update_send_set_keyboard_indicators(rdpContext* context, UINT16 led_flags)
{
	wStream* s;
	rdpRdp* rdp = context->rdp;
	s = rdp_data_pdu_init(rdp);

	if (!s)
		return FALSE;

	Stream_Write_UINT16(s, 0);         /* unitId should be 0 according to MS-RDPBCGR 2.2.8.2.1.1 */
	Stream_Write_UINT16(s, led_flags); /* ledFlags (2 bytes) */
	return rdp_send_data_pdu(rdp, s, DATA_PDU_TYPE_SET_KEYBOARD_INDICATORS, rdp->mcs->userId);
}


static UINT16 update_calculate_new_or_existing_window(const WINDOW_ORDER_INFO* orderInfo,
                                                      const WINDOW_STATE_ORDER* stateOrder)
{
	UINT16 orderSize = 11;

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_OWNER) != 0)
		orderSize += 4;

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_STYLE) != 0)
		orderSize += 8;

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_SHOW) != 0)
		orderSize += 1;

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_TITLE) != 0)
		orderSize += 2 + stateOrder->titleInfo.length;

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_CLIENT_AREA_OFFSET) != 0)
		orderSize += 8;

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_CLIENT_AREA_SIZE) != 0)
		orderSize += 8;

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_RESIZE_MARGIN_X) != 0)
		orderSize += 8;

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_RESIZE_MARGIN_Y) != 0)
		orderSize += 8;

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_RP_CONTENT) != 0)
		orderSize += 1;

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_ROOT_PARENT) != 0)
		orderSize += 4;

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_WND_OFFSET) != 0)
		orderSize += 8;

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_WND_CLIENT_DELTA) != 0)
		orderSize += 8;

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_WND_SIZE) != 0)
		orderSize += 8;

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_WND_RECTS) != 0)
		orderSize += 2 + stateOrder->numWindowRects * sizeof(RECTANGLE_16);

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_VIS_OFFSET) != 0)
		orderSize += 8;

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_VISIBILITY) != 0)
		orderSize += 2 + stateOrder->numVisibilityRects * sizeof(RECTANGLE_16);

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_OVERLAY_DESCRIPTION) != 0)
		orderSize += 2 + stateOrder->OverlayDescription.length;

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_TASKBAR_BUTTON) != 0)
		orderSize += 1;

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_ENFORCE_SERVER_ZORDER) != 0)
		orderSize += 1;

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_APPBAR_STATE) != 0)
		orderSize += 1;

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_APPBAR_EDGE) != 0)
		orderSize += 1;

	return orderSize;
}


static BOOL _update_begin_paint(rdpContext* context)
{
	wStream* s;
	rdpUpdate* update = context->update;

	if (update->us)
	{
		if (!update_end_paint(update))
			return FALSE;
	}

	s = fastpath_update_pdu_init_new(context->rdp->fastpath);

	if (!s)
		return FALSE;

	Stream_SealLength(s);
	Stream_Seek(s, 2); /* numberOrders (2 bytes) */
	update->combineUpdates = TRUE;
	update->numberOrders = 0;
	update->us = s;
	return TRUE;
}


BOOL update_end_paint(rdpUpdate* update)
{
	BOOL rc = FALSE;

	if (!update)
		return FALSE;

	if (update->EndPaint)
		rc = update->EndPaint(update->context);

	LeaveCriticalSection(&update->mux);
	return rc;
}


static BOOL update_write_bitmap_update(rdpUpdate* update, wStream* s,
                                       const BITMAP_UPDATE* bitmapUpdate)
{
	int i;

	if (!Stream_EnsureRemainingCapacity(s, 32))
		return FALSE;

	Stream_Write_UINT16(s, UPDATE_TYPE_BITMAP);   /* updateType */
	Stream_Write_UINT16(s, bitmapUpdate->number); /* numberRectangles (2 bytes) */

	/* rectangles */
	for (i = 0; i < (int)bitmapUpdate->number; i++)
	{
		if (!update_write_bitmap_data(update, s, &bitmapUpdate->rectangles[i]))
			return FALSE;
	}

	return TRUE;
}


static BOOL update_send_notify_icon_create(rdpContext* context, const WINDOW_ORDER_INFO* orderInfo,
                                           const NOTIFY_ICON_STATE_ORDER* iconStateOrder)
{
	return update_send_new_or_existing_notification_icons(context, orderInfo, iconStateOrder);
}


static BOOL update_send_surface_command(rdpContext* context, wStream* s)
{
	wStream* update;
	rdpRdp* rdp = context->rdp;
	BOOL ret;
	update = fastpath_update_pdu_init(rdp->fastpath);

	if (!update)
		return FALSE;

	if (!Stream_EnsureRemainingCapacity(update, Stream_GetPosition(s)))
	{
		ret = FALSE;
		goto out;
	}

	Stream_Write(update, Stream_Buffer(s), Stream_GetPosition(s));
	ret = fastpath_send_update_pdu(rdp->fastpath, FASTPATH_UPDATETYPE_SURFCMDS, update, FALSE);
out:
	Stream_Release(update);
	return ret;
}


void update_reset_state(rdpUpdate* update)
{
	rdpPrimaryUpdate* primary = update->primary;
	rdpAltSecUpdate* altsec = update->altsec;

	if (primary->fast_glyph.glyphData.aj)
	{
		free(primary->fast_glyph.glyphData.aj);
		primary->fast_glyph.glyphData.aj = NULL;
	}

	ZeroMemory(&primary->order_info, sizeof(ORDER_INFO));
	ZeroMemory(&primary->dstblt, sizeof(DSTBLT_ORDER));
	ZeroMemory(&primary->patblt, sizeof(PATBLT_ORDER));
	ZeroMemory(&primary->scrblt, sizeof(SCRBLT_ORDER));
	ZeroMemory(&primary->opaque_rect, sizeof(OPAQUE_RECT_ORDER));
	ZeroMemory(&primary->draw_nine_grid, sizeof(DRAW_NINE_GRID_ORDER));
	ZeroMemory(&primary->multi_dstblt, sizeof(MULTI_DSTBLT_ORDER));
	ZeroMemory(&primary->multi_patblt, sizeof(MULTI_PATBLT_ORDER));
	ZeroMemory(&primary->multi_scrblt, sizeof(MULTI_SCRBLT_ORDER));
	ZeroMemory(&primary->multi_opaque_rect, sizeof(MULTI_OPAQUE_RECT_ORDER));
	ZeroMemory(&primary->multi_draw_nine_grid, sizeof(MULTI_DRAW_NINE_GRID_ORDER));
	ZeroMemory(&primary->line_to, sizeof(LINE_TO_ORDER));
	ZeroMemory(&primary->polyline, sizeof(POLYLINE_ORDER));
	ZeroMemory(&primary->memblt, sizeof(MEMBLT_ORDER));
	ZeroMemory(&primary->mem3blt, sizeof(MEM3BLT_ORDER));
	ZeroMemory(&primary->save_bitmap, sizeof(SAVE_BITMAP_ORDER));
	ZeroMemory(&primary->glyph_index, sizeof(GLYPH_INDEX_ORDER));
	ZeroMemory(&primary->fast_index, sizeof(FAST_INDEX_ORDER));
	ZeroMemory(&primary->fast_glyph, sizeof(FAST_GLYPH_ORDER));
	ZeroMemory(&primary->polygon_sc, sizeof(POLYGON_SC_ORDER));
	ZeroMemory(&primary->polygon_cb, sizeof(POLYGON_CB_ORDER));
	ZeroMemory(&primary->ellipse_sc, sizeof(ELLIPSE_SC_ORDER));
	ZeroMemory(&primary->ellipse_cb, sizeof(ELLIPSE_CB_ORDER));
	primary->order_info.orderType = ORDER_TYPE_PATBLT;

	if (!update->initialState)
	{
		altsec->switch_surface.bitmapId = SCREEN_BITMAP_SURFACE;
		IFCALL(altsec->SwitchSurface, update->context, &(altsec->switch_surface));
	}
}


static BOOL update_send_cache_bitmap_v3(rdpContext* context, CACHE_BITMAP_V3_ORDER* cache_bitmap_v3)
{
	wStream* s;
	size_t bm, em;
	BYTE orderType;
	int headerLength;
	UINT16 extraFlags;
	INT16 orderLength;
	rdpUpdate* update = context->update;
	extraFlags = 0;
	headerLength = 6;
	orderType = ORDER_TYPE_BITMAP_COMPRESSED_V3;
	update_check_flush(context, headerLength + update_approximate_cache_bitmap_v3_order(
	                                               cache_bitmap_v3, &extraFlags));
	s = update->us;

	if (!s)
		return FALSE;

	bm = Stream_GetPosition(s);

	if (!Stream_EnsureRemainingCapacity(s, headerLength))
		return FALSE;

	Stream_Seek(s, headerLength);

	if (!update_write_cache_bitmap_v3_order(s, cache_bitmap_v3, &extraFlags))
		return FALSE;

	em = Stream_GetPosition(s);
	orderLength = (em - bm) - 13;
	Stream_SetPosition(s, bm);
	Stream_Write_UINT8(s, ORDER_STANDARD | ORDER_SECONDARY); /* controlFlags (1 byte) */
	Stream_Write_UINT16(s, orderLength);                     /* orderLength (2 bytes) */
	Stream_Write_UINT16(s, extraFlags);                      /* extraFlags (2 bytes) */
	Stream_Write_UINT8(s, orderType);                        /* orderType (1 byte) */
	Stream_SetPosition(s, em);
	update->numberOrders++;
	return TRUE;
}


static BOOL update_send_surface_frame_marker(rdpContext* context,
                                             const SURFACE_FRAME_MARKER* surfaceFrameMarker)
{
	wStream* s;
	rdpRdp* rdp = context->rdp;
	BOOL ret = FALSE;
	update_force_flush(context);
	s = fastpath_update_pdu_init(rdp->fastpath);

	if (!s)
		return FALSE;

	if (!update_write_surfcmd_frame_marker(s, surfaceFrameMarker->frameAction,
	                                       surfaceFrameMarker->frameId) ||
	    !fastpath_send_update_pdu(rdp->fastpath, FASTPATH_UPDATETYPE_SURFCMDS, s, FALSE))
		goto out_fail;

	update_force_flush(context);
	ret = TRUE;
out_fail:
	Stream_Release(s);
	return ret;
}


static BOOL _update_read_pointer_large(wStream* s, POINTER_LARGE_UPDATE* pointer)
{
	BYTE* newMask;
	UINT32 scanlineSize;

	if (!pointer)
		goto fail;

	if (Stream_GetRemainingLength(s) < 20)
		goto fail;

	Stream_Read_UINT16(s, pointer->xorBpp);
	Stream_Read_UINT16(s, pointer->cacheIndex); /* cacheIndex (2 bytes) */
	Stream_Read_UINT16(s, pointer->hotSpotX);   /* xPos (2 bytes) */
	Stream_Read_UINT16(s, pointer->hotSpotY);   /* yPos (2 bytes) */

	Stream_Read_UINT16(s, pointer->width);  /* width (2 bytes) */
	Stream_Read_UINT16(s, pointer->height); /* height (2 bytes) */

	if ((pointer->width > 384) || (pointer->height > 384))
		goto fail;

	Stream_Read_UINT32(s, pointer->lengthAndMask); /* lengthAndMask (4 bytes) */
	Stream_Read_UINT32(s, pointer->lengthXorMask); /* lengthXorMask (4 bytes) */

	if (pointer->hotSpotX >= pointer->width)
		pointer->hotSpotX = 0;

	if (pointer->hotSpotY >= pointer->height)
		pointer->hotSpotY = 0;

	if (pointer->lengthXorMask > 0)
	{
		/**
		 * Spec states that:
		 *
		 * xorMaskData (variable): A variable-length array of bytes. Contains the 24-bpp, bottom-up
		 * XOR mask scan-line data. The XOR mask is padded to a 2-byte boundary for each encoded
		 * scan-line. For example, if a 3x3 pixel cursor is being sent, then each scan-line will
		 * consume 10 bytes (3 pixels per scan-line multiplied by 3 bytes per pixel, rounded up to
		 * the next even number of bytes).
		 *
		 * In fact instead of 24-bpp, the bpp parameter is given by the containing packet.
		 */
		if (Stream_GetRemainingLength(s) < pointer->lengthXorMask)
			goto fail;

		scanlineSize = (7 + pointer->xorBpp * pointer->width) / 8;
		scanlineSize = ((scanlineSize + 1) / 2) * 2;

		if (scanlineSize * pointer->height != pointer->lengthXorMask)
		{
			WLog_ERR(TAG,
			         "invalid lengthXorMask: width=%" PRIu32 " height=%" PRIu32 ", %" PRIu32
			         " instead of %" PRIu32 "",
			         pointer->width, pointer->height, pointer->lengthXorMask,
			         scanlineSize * pointer->height);
			goto fail;
		}

		newMask = realloc(pointer->xorMaskData, pointer->lengthXorMask);

		if (!newMask)
			goto fail;

		pointer->xorMaskData = newMask;
		Stream_Read(s, pointer->xorMaskData, pointer->lengthXorMask);
	}

	if (pointer->lengthAndMask > 0)
	{
		/**
		 * andMaskData (variable): A variable-length array of bytes. Contains the 1-bpp, bottom-up
		 * AND mask scan-line data. The AND mask is padded to a 2-byte boundary for each encoded
		 * scan-line. For example, if a 7x7 pixel cursor is being sent, then each scan-line will
		 * consume 2 bytes (7 pixels per scan-line multiplied by 1 bpp, rounded up to the next even
		 * number of bytes).
		 */
		if (Stream_GetRemainingLength(s) < pointer->lengthAndMask)
			goto fail;

		scanlineSize = ((7 + pointer->width) / 8);
		scanlineSize = ((1 + scanlineSize) / 2) * 2;

		if (scanlineSize * pointer->height != pointer->lengthAndMask)
		{
			WLog_ERR(TAG, "invalid lengthAndMask: %" PRIu32 " instead of %" PRIu32 "",
			         pointer->lengthAndMask, scanlineSize * pointer->height);
			goto fail;
		}

		newMask = realloc(pointer->andMaskData, pointer->lengthAndMask);

		if (!newMask)
			goto fail;

		pointer->andMaskData = newMask;
		Stream_Read(s, pointer->andMaskData, pointer->lengthAndMask);
	}

	if (Stream_GetRemainingLength(s) > 0)
		Stream_Seek_UINT8(s); /* pad (1 byte) */

	return TRUE;
fail:
	return FALSE;
}


static BOOL update_check_flush(rdpContext* context, int size)
{
	wStream* s;
	rdpUpdate* update = context->update;
	s = update->us;

	if (!update->us)
	{
		update_begin_paint(update);
		return FALSE;
	}

	if (Stream_GetPosition(s) + size + 64 >= 0x3FFF)
	{
		update_flush(context);
		return TRUE;
	}

	return FALSE;
}


static BOOL update_send_line_to(rdpContext* context, const LINE_TO_ORDER* line_to)
{
	wStream* s;
	int offset;
	int headerLength;
	ORDER_INFO orderInfo;
	int inf;
	rdpUpdate* update = context->update;
	headerLength = update_prepare_order_info(context, &orderInfo, ORDER_TYPE_LINE_TO);
	inf = update_approximate_line_to_order(&orderInfo, line_to);
	update_check_flush(context, headerLength + inf);
	s = update->us;

	if (!s)
		return FALSE;

	offset = Stream_GetPosition(s);

	if (!Stream_EnsureRemainingCapacity(s, headerLength))
		return FALSE;

	Stream_Seek(s, headerLength);
	update_write_line_to_order(s, &orderInfo, line_to);
	update_write_order_info(context, s, &orderInfo, offset);
	update->numberOrders++;
	return TRUE;
}


static BOOL update_send_refresh_rect(rdpContext* context, BYTE count, const RECTANGLE_16* areas)
{
	rdpRdp* rdp = context->rdp;

	if (rdp->settings->RefreshRect)
	{
		wStream* s = rdp_data_pdu_init(rdp);

		if (!s)
			return FALSE;

		update_write_refresh_rect(s, count, areas);
		return rdp_send_data_pdu(rdp, s, DATA_PDU_TYPE_REFRESH_RECT, rdp->mcs->userId);
	}

	return TRUE;
}


static BOOL update_send_non_monitored_desktop(rdpContext* context,
                                              const WINDOW_ORDER_INFO* orderInfo)
{
	wStream* s;
	rdpUpdate* update = context->update;
	BYTE controlFlags = ORDER_SECONDARY | (ORDER_TYPE_WINDOW << 2);
	UINT16 orderSize = 7;
	update_check_flush(context, orderSize);

	s = update->us;

	if (!s)
		return FALSE;

	Stream_Write_UINT8(s, controlFlags);           /* Header (1 byte) */
	Stream_Write_UINT16(s, orderSize);             /* OrderSize (2 bytes) */
	Stream_Write_UINT32(s, orderInfo->fieldFlags); /* FieldsPresentFlags (4 bytes) */
	update->numberOrders++;
	return TRUE;
}


static BOOL update_send_window_icon(rdpContext* context, const WINDOW_ORDER_INFO* orderInfo,
                                    const WINDOW_ICON_ORDER* iconOrder)
{
	wStream* s;
	rdpUpdate* update = context->update;
	BYTE controlFlags = ORDER_SECONDARY | (ORDER_TYPE_WINDOW << 2);
	ICON_INFO* iconInfo = iconOrder->iconInfo;
	UINT16 orderSize = update_calculate_window_icon_order(orderInfo, iconOrder);

	update_check_flush(context, orderSize);

	s = update->us;

	if (!s || !iconInfo)
		return FALSE;

	if (!Stream_EnsureRemainingCapacity(s, orderSize))
		return FALSE;

	/* Write Hdr */
	Stream_Write_UINT8(s, controlFlags);           /* Header (1 byte) */
	Stream_Write_UINT16(s, orderSize);             /* OrderSize (2 bytes) */
	Stream_Write_UINT32(s, orderInfo->fieldFlags); /* FieldsPresentFlags (4 bytes) */
	Stream_Write_UINT32(s, orderInfo->windowId);   /* WindowID (4 bytes) */
	/* Write body */
	Stream_Write_UINT16(s, iconInfo->cacheEntry); /* CacheEntry (2 bytes) */
	Stream_Write_UINT8(s, iconInfo->cacheId);     /* CacheId (1 byte) */
	Stream_Write_UINT8(s, iconInfo->bpp);         /* Bpp (1 byte) */
	Stream_Write_UINT16(s, iconInfo->width);      /* Width (2 bytes) */
	Stream_Write_UINT16(s, iconInfo->height);     /* Height (2 bytes) */

	if (iconInfo->bpp <= 8)
	{
		Stream_Write_UINT16(s, iconInfo->cbColorTable); /* CbColorTable (2 bytes) */
	}

	Stream_Write_UINT16(s, iconInfo->cbBitsMask);              /* CbBitsMask (2 bytes) */
	Stream_Write_UINT16(s, iconInfo->cbBitsColor);             /* CbBitsColor (2 bytes) */
	Stream_Write(s, iconInfo->bitsMask, iconInfo->cbBitsMask); /* BitsMask (variable) */

	if (iconInfo->bpp <= 8)
	{
		Stream_Write(s, iconInfo->colorTable, iconInfo->cbColorTable); /* ColorTable (variable) */
	}

	Stream_Write(s, iconInfo->bitsColor, iconInfo->cbBitsColor); /* BitsColor (variable) */

	update->numberOrders++;
	return TRUE;
}


PALETTE_UPDATE* update_read_palette(rdpUpdate* update, wStream* s)
{
	int i;
	PALETTE_ENTRY* entry;
	PALETTE_UPDATE* palette_update = calloc(1, sizeof(PALETTE_UPDATE));

	if (!palette_update)
		goto fail;

	if (Stream_GetRemainingLength(s) < 6)
		goto fail;

	Stream_Seek_UINT16(s);                         /* pad2Octets (2 bytes) */
	Stream_Read_UINT32(s, palette_update->number); /* numberColors (4 bytes), must be set to 256 */

	if (palette_update->number > 256)
		palette_update->number = 256;

	if (Stream_GetRemainingLength(s) < palette_update->number * 3)
		goto fail;

	/* paletteEntries */
	for (i = 0; i < (int)palette_update->number; i++)
	{
		entry = &palette_update->entries[i];
		Stream_Read_UINT8(s, entry->red);
		Stream_Read_UINT8(s, entry->green);
		Stream_Read_UINT8(s, entry->blue);
	}

	return palette_update;
fail:
	free_palette_update(update->context, palette_update);
	return NULL;
}


void update_free_window_state(WINDOW_STATE_ORDER* window_state)
{
	if (!window_state)
		return;

	free(window_state->OverlayDescription.string);
	free(window_state->titleInfo.string);
	free(window_state->windowRects);
	free(window_state->visibilityRects);
	memset(window_state, 0, sizeof(WINDOW_STATE_ORDER));
}


static BOOL update_send_dstblt(rdpContext* context, const DSTBLT_ORDER* dstblt)
{
	wStream* s;
	UINT32 offset;
	UINT32 headerLength;
	ORDER_INFO orderInfo;
	int inf;
	rdpUpdate* update = context->update;
	headerLength = update_prepare_order_info(context, &orderInfo, ORDER_TYPE_DSTBLT);
	inf = update_approximate_dstblt_order(&orderInfo, dstblt);
	update_check_flush(context, headerLength + inf);
	s = update->us;

	if (!s)
		return FALSE;

	offset = Stream_GetPosition(s);

	if (!Stream_EnsureRemainingCapacity(s, headerLength))
		return FALSE;

	Stream_Seek(s, headerLength);

	if (!update_write_dstblt_order(s, &orderInfo, dstblt))
		return FALSE;

	update_write_order_info(context, s, &orderInfo, offset);
	update->numberOrders++;
	return TRUE;
}


rdpUpdate* update_new(rdpRdp* rdp)
{
	const wObject cb = { NULL, NULL, NULL, update_free_queued_message, NULL };
	rdpUpdate* update;
	OFFSCREEN_DELETE_LIST* deleteList;
	WINPR_UNUSED(rdp);
	update = (rdpUpdate*)calloc(1, sizeof(rdpUpdate));

	if (!update)
		return NULL;

	update->log = WLog_Get("com.freerdp.core.update");
	InitializeCriticalSection(&(update->mux));
	update->pointer = (rdpPointerUpdate*)calloc(1, sizeof(rdpPointerUpdate));

	if (!update->pointer)
		goto fail;

	update->primary = (rdpPrimaryUpdate*)calloc(1, sizeof(rdpPrimaryUpdate));

	if (!update->primary)
		goto fail;

	update->secondary = (rdpSecondaryUpdate*)calloc(1, sizeof(rdpSecondaryUpdate));

	if (!update->secondary)
		goto fail;

	update->altsec = (rdpAltSecUpdate*)calloc(1, sizeof(rdpAltSecUpdate));

	if (!update->altsec)
		goto fail;

	update->window = (rdpWindowUpdate*)calloc(1, sizeof(rdpWindowUpdate));

	if (!update->window)
		goto fail;

	deleteList = &(update->altsec->create_offscreen_bitmap.deleteList);
	deleteList->sIndices = 64;
	deleteList->indices = calloc(deleteList->sIndices, 2);

	if (!deleteList->indices)
		goto fail;

	deleteList->cIndices = 0;
	update->SuppressOutput = update_send_suppress_output;
	update->initialState = TRUE;
	update->autoCalculateBitmapData = TRUE;
	update->queue = MessageQueue_New(&cb);

	if (!update->queue)
		goto fail;

	return update;
fail:
	update_free(update);
	return NULL;
}


POINTER_COLOR_UPDATE* update_read_pointer_color(rdpUpdate* update, wStream* s, BYTE xorBpp)
{
	POINTER_COLOR_UPDATE* pointer_color = calloc(1, sizeof(POINTER_COLOR_UPDATE));

	if (!pointer_color)
		goto fail;

	if (!_update_read_pointer_color(s, pointer_color, xorBpp,
	                                update->context->settings->LargePointerFlag))
		goto fail;

	return pointer_color;
fail:
	free_pointer_color_update(update->context, pointer_color);
	return NULL;
}


static BOOL update_bounds_equals(rdpBounds* bounds1, rdpBounds* bounds2)
{
	if ((bounds1->left == bounds2->left) && (bounds1->top == bounds2->top) &&
	    (bounds1->right == bounds2->right) && (bounds1->bottom == bounds2->bottom))
		return TRUE;

	return FALSE;
}


static BOOL update_bounds_is_null(rdpBounds* bounds)
{
	if ((bounds->left == 0) && (bounds->top == 0) && (bounds->right == 0) && (bounds->bottom == 0))
		return TRUE;

	return FALSE;
}


static BOOL update_send_play_sound(rdpContext* context, const PLAY_SOUND_UPDATE* play_sound)
{
	wStream* s;
	rdpRdp* rdp = context->rdp;

	if (!rdp->settings->ReceivedCapabilities[CAPSET_TYPE_SOUND])
	{
		return TRUE;
	}

	s = rdp_data_pdu_init(rdp);

	if (!s)
		return FALSE;

	Stream_Write_UINT32(s, play_sound->duration);
	Stream_Write_UINT32(s, play_sound->frequency);
	return rdp_send_data_pdu(rdp, s, DATA_PDU_TYPE_PLAY_SOUND, rdp->mcs->userId);
}


static BOOL update_send_set_keyboard_ime_status(rdpContext* context, UINT16 imeId, UINT32 imeState,
                                                UINT32 imeConvMode)
{
	wStream* s;
	rdpRdp* rdp = context->rdp;
	s = rdp_data_pdu_init(rdp);

	if (!s)
		return FALSE;

	/* unitId should be 0 according to MS-RDPBCGR 2.2.8.2.2.1 */
	Stream_Write_UINT16(s, imeId);
	Stream_Write_UINT32(s, imeState);
	Stream_Write_UINT32(s, imeConvMode);
	return rdp_send_data_pdu(rdp, s, DATA_PDU_TYPE_SET_KEYBOARD_IME_STATUS, rdp->mcs->userId);
}


static BOOL update_send_cache_glyph_v2(rdpContext* context,
                                       const CACHE_GLYPH_V2_ORDER* cache_glyph_v2)
{
	wStream* s;
	UINT16 flags;
	size_t bm, em, inf;
	int headerLength;
	INT16 orderLength;
	rdpUpdate* update = context->update;
	flags = 0;
	headerLength = 6;
	inf = update_approximate_cache_glyph_v2_order(cache_glyph_v2, &flags);
	update_check_flush(context, headerLength + inf);
	s = update->us;

	if (!s)
		return FALSE;

	bm = Stream_GetPosition(s);

	if (!Stream_EnsureRemainingCapacity(s, headerLength))
		return FALSE;

	Stream_Seek(s, headerLength);

	if (!update_write_cache_glyph_v2_order(s, cache_glyph_v2, &flags))
		return FALSE;

	em = Stream_GetPosition(s);
	orderLength = (em - bm) - 13;
	Stream_SetPosition(s, bm);
	Stream_Write_UINT8(s, ORDER_STANDARD | ORDER_SECONDARY); /* controlFlags (1 byte) */
	Stream_Write_UINT16(s, orderLength);                     /* orderLength (2 bytes) */
	Stream_Write_UINT16(s, flags);                           /* extraFlags (2 bytes) */
	Stream_Write_UINT8(s, ORDER_TYPE_CACHE_GLYPH);           /* orderType (1 byte) */
	Stream_SetPosition(s, em);
	update->numberOrders++;
	return TRUE;
}


update_send_new_or_existing_notification_icons(rdpContext* context,
                                               const WINDOW_ORDER_INFO* orderInfo,
                                               const NOTIFY_ICON_STATE_ORDER* iconStateOrder)
{
	wStream* s;
	rdpUpdate* update = context->update;
	BYTE controlFlags = ORDER_SECONDARY | (ORDER_TYPE_WINDOW << 2);
	BOOL versionFieldPresent = FALSE;
	UINT16 orderSize =
	    update_calculate_new_or_existing_notification_icons_order(orderInfo, iconStateOrder);

	update_check_flush(context, orderSize);

	s = update->us;
	if (!s)
		return FALSE;

	if (!Stream_EnsureRemainingCapacity(s, orderSize))
		return FALSE;

	/* Write Hdr */
	Stream_Write_UINT8(s, controlFlags);             /* Header (1 byte) */
	Stream_Write_INT16(s, orderSize);                /* OrderSize (2 bytes) */
	Stream_Write_UINT32(s, orderInfo->fieldFlags);   /* FieldsPresentFlags (4 bytes) */
	Stream_Write_UINT32(s, orderInfo->windowId);     /* WindowID (4 bytes) */
	Stream_Write_UINT32(s, orderInfo->notifyIconId); /* NotifyIconId (4 bytes) */

	/* Write body */
	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_NOTIFY_VERSION) != 0)
	{
		versionFieldPresent = TRUE;
		Stream_Write_UINT32(s, iconStateOrder->version);
	}

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_NOTIFY_TIP) != 0)
	{
		Stream_Write_UINT16(s, iconStateOrder->toolTip.length);
		Stream_Write(s, iconStateOrder->toolTip.string, iconStateOrder->toolTip.length);
	}

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_NOTIFY_INFO_TIP) != 0)
	{
		NOTIFY_ICON_INFOTIP infoTip = iconStateOrder->infoTip;

		/* info tip should not be sent when version is 0 */
		if (versionFieldPresent && iconStateOrder->version == 0)
			return FALSE;

		Stream_Write_UINT32(s, infoTip.timeout);     /* Timeout (4 bytes) */
		Stream_Write_UINT32(s, infoTip.flags);       /* InfoFlags (4 bytes) */
		Stream_Write_UINT16(s, infoTip.text.length); /* InfoTipText (variable) */
		Stream_Write(s, infoTip.text.string, infoTip.text.length);
		Stream_Write_UINT16(s, infoTip.title.length); /* Title (variable) */
		Stream_Write(s, infoTip.title.string, infoTip.title.length);
	}

	if ((orderInfo->fieldFlags & WINDOW_ORDER_FIELD_NOTIFY_STATE) != 0)
	{
		/* notify state should not be sent when version is 0 */
		if (versionFieldPresent && iconStateOrder->version == 0)
			return FALSE;

		Stream_Write_UINT32(s, iconStateOrder->state);
	}

	if ((orderInfo->fieldFlags & WINDOW_ORDER_ICON) != 0)
	{
		ICON_INFO iconInfo = iconStateOrder->icon;
		Stream_Write_UINT16(s, iconInfo.cacheEntry); /* CacheEntry (2 bytes) */
		Stream_Write_UINT8(s, iconInfo.cacheId);     /* CacheId (1 byte) */
		Stream_Write_UINT8(s, iconInfo.bpp);         /* Bpp (1 byte) */
		Stream_Write_UINT16(s, iconInfo.width);      /* Width (2 bytes) */
		Stream_Write_UINT16(s, iconInfo.height);     /* Height (2 bytes) */

		if (iconInfo.bpp <= 8)
		{
			Stream_Write_UINT16(s, iconInfo.cbColorTable); /* CbColorTable (2 bytes) */
		}

		Stream_Write_UINT16(s, iconInfo.cbBitsMask);             /* CbBitsMask (2 bytes) */
		Stream_Write_UINT16(s, iconInfo.cbBitsColor);            /* CbBitsColor (2 bytes) */
		Stream_Write(s, iconInfo.bitsMask, iconInfo.cbBitsMask); /* BitsMask (variable) */
		orderSize += iconInfo.cbBitsMask;

		if (iconInfo.bpp <= 8)
		{
			Stream_Write(s, iconInfo.colorTable, iconInfo.cbColorTable); /* ColorTable (variable) */
		}

		Stream_Write(s, iconInfo.bitsColor, iconInfo.cbBitsColor); /* BitsColor (variable) */
	}
	else if ((orderInfo->fieldFlags & WINDOW_ORDER_CACHED_ICON) != 0)
	{
		CACHED_ICON_INFO cachedIcon = iconStateOrder->cachedIcon;
		Stream_Write_UINT16(s, cachedIcon.cacheEntry); /* CacheEntry (2 bytes) */
		Stream_Write_UINT8(s, cachedIcon.cacheId);     /* CacheId (1 byte) */
	}

	update->numberOrders++;
	return TRUE;
}


static BOOL update_send_opaque_rect(rdpContext* context, const OPAQUE_RECT_ORDER* opaque_rect)
{
	wStream* s;
	size_t offset;
	int headerLength;
	ORDER_INFO orderInfo;
	rdpUpdate* update = context->update;
	headerLength = update_prepare_order_info(context, &orderInfo, ORDER_TYPE_OPAQUE_RECT);
	update_check_flush(context, headerLength +
	                                update_approximate_opaque_rect_order(&orderInfo, opaque_rect));
	s = update->us;

	if (!s)
		return FALSE;

	offset = Stream_GetPosition(s);

	if (!Stream_EnsureRemainingCapacity(s, headerLength))
		return FALSE;

	Stream_Seek(s, headerLength);
	update_write_opaque_rect_order(s, &orderInfo, opaque_rect);
	update_write_order_info(context, s, &orderInfo, offset);
	update->numberOrders++;
	return TRUE;
}