diff --git a/src/Bindings/ManualBindings.cpp b/src/Bindings/ManualBindings.cpp
index 92b410481..b3f75aff1 100644
--- a/src/Bindings/ManualBindings.cpp
+++ b/src/Bindings/ManualBindings.cpp
@@ -1750,7 +1750,6 @@ static int tolua_cWorld_ChunkStay(lua_State * tolua_S)
 	{
 		return 0;
 	}
-	cLuaChunkStay * ChunkStay = new cLuaChunkStay(*Plugin);
 	
 	// Read the params:
 	cWorld * World = (cWorld *)tolua_tousertype(tolua_S, 1, NULL);
@@ -1760,8 +1759,12 @@ static int tolua_cWorld_ChunkStay(lua_State * tolua_S)
 		L.LogStackTrace();
 		return 0;
 	}
+
+	cLuaChunkStay * ChunkStay = new cLuaChunkStay(*Plugin);
+
 	if (!ChunkStay->AddChunks(2))
 	{
+		delete ChunkStay;
 		return 0;
 	}
 
diff --git a/src/Noise.cpp b/src/Noise.cpp
index efbb128c3..95a022ea3 100644
--- a/src/Noise.cpp
+++ b/src/Noise.cpp
@@ -744,6 +744,8 @@ void cCubicNoise::CalcFloorFrac(
 	int * a_Same, int & a_NumSame
 ) const
 {
+	ASSERT(a_Size > 0);
+
 	NOISE_DATATYPE val = a_Start;
 	NOISE_DATATYPE dif = (a_End - a_Start) / (a_Size - 1);
 	for (int i = 0; i < a_Size; i++)
diff --git a/src/OSSupport/GZipFile.cpp b/src/OSSupport/GZipFile.cpp
index 7a8433f4f..22d887783 100644
--- a/src/OSSupport/GZipFile.cpp
+++ b/src/OSSupport/GZipFile.cpp
@@ -11,7 +11,7 @@
 
 
 cGZipFile::cGZipFile(void) :
-	m_File(NULL)
+	m_File(NULL), m_Mode(fmRead)
 {
 }
 
diff --git a/src/Protocol/Authenticator.cpp b/src/Protocol/Authenticator.cpp
index e0fcc0007..bbc656eda 100644
--- a/src/Protocol/Authenticator.cpp
+++ b/src/Protocol/Authenticator.cpp
@@ -165,6 +165,10 @@ bool cAuthenticator::AuthWithYggdrasil(AString & a_UserName, const AString & a_S
 	if ((ret = ctr_drbg_init(&ctr_drbg, entropy_func, &entropy, (const unsigned char *)pers, strlen(pers))) != 0)
 	{
 		LOGWARNING("cAuthenticator: ctr_drbg_init returned %d", ret);
+
+		// Free all resources which have been initialized up to this line
+		x509_crt_free(&cacert);
+		entropy_free(&entropy);
 		return false;
 	}
 
@@ -175,6 +179,10 @@ bool cAuthenticator::AuthWithYggdrasil(AString & a_UserName, const AString & a_S
 	if (ret < 0)
 	{
 		LOGWARNING("cAuthenticator: x509_crt_parse returned -0x%x", -ret);
+
+		// Free all resources which have been initialized up to this line
+		x509_crt_free(&cacert);
+		entropy_free(&entropy);
 		return false;
 	}
 
@@ -182,6 +190,10 @@ bool cAuthenticator::AuthWithYggdrasil(AString & a_UserName, const AString & a_S
 	if ((ret = net_connect(&server_fd, m_Server.c_str(), 443)) != 0)
 	{
 		LOGWARNING("cAuthenticator: Can't connect to %s: %d", m_Server.c_str(), ret);
+
+		// Free all resources which have been initialized up to this line
+		x509_crt_free(&cacert);
+		entropy_free(&entropy);
 		return false;
 	}
 
@@ -189,6 +201,13 @@ bool cAuthenticator::AuthWithYggdrasil(AString & a_UserName, const AString & a_S
 	if ((ret = ssl_init(&ssl)) != 0)
 	{
 		LOGWARNING("cAuthenticator: ssl_init returned %d", ret);
+
+		// Free all resources which have been initialized up to this line
+		x509_crt_free(&cacert);
+		net_close(server_fd);
+		ssl_free(&ssl);
+		entropy_free(&entropy);
+		memset(&ssl, 0, sizeof(ssl));
 		return false;
 	}
 	ssl_set_endpoint(&ssl, SSL_IS_CLIENT);
@@ -203,6 +222,13 @@ bool cAuthenticator::AuthWithYggdrasil(AString & a_UserName, const AString & a_S
 		if ((ret != POLARSSL_ERR_NET_WANT_READ) && (ret != POLARSSL_ERR_NET_WANT_WRITE))
 		{
 			LOGWARNING("cAuthenticator: ssl_handshake returned -0x%x", -ret);
+
+			// Free all resources which have been initialized up to this line
+			x509_crt_free(&cacert);
+			net_close(server_fd);
+			ssl_free(&ssl);
+			entropy_free(&entropy);
+			memset(&ssl, 0, sizeof(ssl));
 			return false;
 		}
 	}
@@ -223,6 +249,13 @@ bool cAuthenticator::AuthWithYggdrasil(AString & a_UserName, const AString & a_S
 	if (ret <= 0)
 	{
 		LOGWARNING("cAuthenticator: ssl_write returned %d", ret);
+		
+		// Free all resources which have been initialized up to this line
+		x509_crt_free(&cacert);
+		net_close(server_fd);
+		ssl_free(&ssl);
+		entropy_free(&entropy);
+		memset(&ssl, 0, sizeof(ssl));
 		return false;
 	}
 
diff --git a/src/WorldStorage/WSSCompact.cpp b/src/WorldStorage/WSSCompact.cpp
index c07c9e96f..359bac4a8 100644
--- a/src/WorldStorage/WSSCompact.cpp
+++ b/src/WorldStorage/WSSCompact.cpp
@@ -468,7 +468,15 @@ cWSSCompact::cPAKFile::cPAKFile(const AString & a_FileName, int a_LayerX, int a_
 	for (int i = 0; i < NumChunks; i++)
 	{
 		sChunkHeader * Header = new sChunkHeader;
-		READ(*Header);
+		
+		// Here we do not use the READ macro, as it does not free the resources
+		// allocated with new in case of error.
+		if (f.Read(Header, sizeof(*Header)) != sizeof(*Header))
+		{
+			LOGERROR("ERROR READING %s FROM FILE %s (line %d); file offset %d", "Header", m_FileName.c_str(), __LINE__, f.Tell());
+			delete Header;
+			return;
+		}
 		m_ChunkHeaders.push_back(Header);
 	}  // for i - chunk headers