[BUGFIX] Protect pattern loading to mainMatcher by a mutex

utils/artefacts_util.cpp

@@ -1,6 +1,7 @@
 #include "artefacts_util.h"
 #include <peconv.h>
 #include "code_patterns.h"
+#include "custom_mutex.h"
 #ifdef _DEBUG
 	#include <iostream>
 #endif
@@ -21,9 +22,11 @@ BYTE* pesieve::util::find_pattern(BYTE* buffer, size_t buf_size, BYTE* pattern_b
 namespace pesieve {
 
 	std::set<DWORD> HardcodedPatterns;
+	pesieve::util::Mutex g_HardcodedPatternsMutex;
 
 	size_t init_32_patterns(Node* rootN)
 	{
+		util::MutexLocker guard(g_HardcodedPatternsMutex);
 		if (!rootN) return 0;
 
 		size_t added = 0;
@@ -42,6 +45,7 @@ namespace pesieve {
 
 	size_t init_64_patterns(Node* rootN)
 	{
+		util::MutexLocker guard(g_HardcodedPatternsMutex);
 		if (!rootN) return 0;
 
 		size_t added = 0;
@@ -139,14 +143,17 @@ bool pesieve::util::is_normal_inaccessible(DWORD state, DWORD mapping_type, DWOR
 // matcher:
 
 sig_finder::Node mainMatcher;
+pesieve::util::Mutex g_mainMatcherMutex;
 
 bool pesieve::matcher::is_matcher_ready()
 {
+	util::MutexLocker guard(g_mainMatcherMutex);
 	return (mainMatcher.isEnd()) ? false : true;
 }
 
 size_t pesieve::matcher::load_pattern_file(const char* filename)
 {
+	util::MutexLocker guard(g_mainMatcherMutex);
 	static bool isLoaded = false;
 	if (isLoaded) return 0; // allow to load file only once
 
@@ -164,6 +171,7 @@ size_t pesieve::matcher::load_pattern_file(const char* filename)
 
 bool pesieve::matcher::init_shellcode_patterns()
 {
+	util::MutexLocker guard(g_mainMatcherMutex);
 	static bool isLoaded = false;
 	if (isLoaded) return false; // allow to load only once
 
@@ -187,6 +195,7 @@ size_t pesieve::matcher::find_all_patterns(BYTE* loadedData, size_t loadedSize,
 
 size_t pesieve::matcher::filter_custom(std::vector<sig_finder::Match>& allMatches, std::vector<sig_finder::Match>& customPatternMatches)
 {
+	util::MutexLocker guard(g_HardcodedPatternsMutex);
 	size_t customCount = 0;
 	for (auto itr = allMatches.begin(); itr != allMatches.end(); ++itr) {
 		sig_finder::Match m = *itr;