Pattern16 finds itself

[rxznve]

Pattern16 allocates memory which it eventually finds...

1. Run a process that definitely does not have a test string in memory
2. Check through a debugger or in any other way that this string is not in memory
3. Inject the library and let it finish scanning
4. Check again for the presence of this string in memory

Code to reproduce the problem

#include <Windows.h>
#include <iostream>

#include "pattern16/include/Pattern16.h"

void* ScanMemory(const char* string)
{
	uintptr_t* address = nullptr;

	MEMORY_BASIC_INFORMATION meminfo{};

	while (VirtualQuery(address, &meminfo, sizeof(meminfo)))
	{
		address = reinterpret_cast<uintptr_t*>
			(reinterpret_cast<SIZE_T>(meminfo.BaseAddress) + meminfo.RegionSize);

		if (!(meminfo.State == MEM_COMMIT &&
			meminfo.Type == MEM_PRIVATE &&
			meminfo.Protect == PAGE_READWRITE))
			continue;

		void* ptr = Pattern16::scan(meminfo.BaseAddress, meminfo.RegionSize, string);

		if (ptr)
			return ptr;
	}

	return nullptr;
}

int main()
{
	// Hello World
	void* ptr = ScanMemory("48 65 6C 6C 6F 20 57 6F 72 6C 64");

	if (ptr)
		std::cout << ptr << std::endl;
	else
		std::cout << "String not found!" << std::endl;

	system("pause");
	return EXIT_SUCCESS;
}