Paranoia: Add destination buffer size to Engine::errorString to help avoiding buffer overflows.

svn-id: r35072

5 files changed, 8 insertions, 8 deletions

diff --git a/common/util.cpp b/common/util.cpp
index 13a810e20f..0b11cf0074 100644
--- a/common/util.cpp
+++ b/common/util.cpp
@@ -465,7 +465,7 @@ static void debugHelper(const char *in_buf, bool caret = true) {
 
 	// Next, give the active engine (if any) a chance to augment the message
 	if (g_engine) {
-		g_engine->errorString(in_buf, buf);
+		g_engine->errorString(in_buf, buf, STRINGBUFLEN);
 	} else {
 		strcpy(buf, in_buf);
 	}
@@ -583,7 +583,7 @@ void NORETURN error(const char *s, ...) {
 
 	// Next, give the active engine (if any) a chance to augment the message
 	if (g_engine) {
-		g_engine->errorString(buf_input, buf_output);
+		g_engine->errorString(buf_input, buf_output, STRINGBUFLEN);
 	} else {
 		strcpy(buf_output, buf_input);
 	}
diff --git a/engines/engine.cpp b/engines/engine.cpp
index dcdcbd1d32..2c9835acc5 100644
--- a/engines/engine.cpp
+++ b/engines/engine.cpp
@@ -251,8 +251,8 @@ bool Engine::shouldPerformAutoSave(int lastSaveTime) {
 	return autosavePeriod != 0 && diff > autosavePeriod * 1000;
 }
 
-void Engine::errorString(const char *buf1, char *buf2) {
-	strcpy(buf2, buf1);
+void Engine::errorString(const char *buf1, char *buf2, int size) {
+	strncpy(buf2, buf1, size);
 }
 
 void Engine::pauseEngine(bool pause) {
diff --git a/engines/engine.h b/engines/engine.h
index 4e16f01335..de8523a1b0 100644
--- a/engines/engine.h
+++ b/engines/engine.h
@@ -154,7 +154,7 @@ public:
 	/**
 	 * Prepare an error string, which is printed by the error() function.
 	 */
-	virtual void errorString(const char *buf_input, char *buf_output);
+	virtual void errorString(const char *buf_input, char *buf_output, int buf_output_size);
 
 	/**
 	 * Return the engine's debugger instance, if any. Used by error() to
diff --git a/engines/scumm/scumm.cpp b/engines/scumm/scumm.cpp
index 0869a3dff6..93605fa29b 100644
--- a/engines/scumm/scumm.cpp
+++ b/engines/scumm/scumm.cpp
@@ -2338,9 +2338,9 @@ GUI::Debugger *ScummEngine::getDebugger() {
 	return _debugger;
 }
 
-void ScummEngine::errorString(const char *buf1, char *buf2) {
+void ScummEngine::errorString(const char *buf1, char *buf2, int buf2Size) {
 	if (_currentScript != 0xFF) {
-		sprintf(buf2, "(%d:%d:0x%lX): %s", _roomResource,
+		snprintf(buf2, buf2Size, "(%d:%d:0x%lX): %s", _roomResource,
 			vm.slot[_currentScript].number, (long)(_scriptPointer - _scriptOrgPointer), buf1);
 	} else {
 		strcpy(buf2, buf1);
diff --git a/engines/scumm/scumm.h b/engines/scumm/scumm.h
index 1c550f824c..c4697ecbe4 100644
--- a/engines/scumm/scumm.h
+++ b/engines/scumm/scumm.h
@@ -445,7 +445,7 @@ public:
 	// Engine APIs
 	virtual Common::Error init();
 	virtual Common::Error go();
-	virtual void errorString(const char *buf_input, char *buf_output);
+	virtual void errorString(const char *buf_input, char *buf_output, int buf_output_size);
 	virtual GUI::Debugger *getDebugger();
 	virtual bool hasFeature(EngineFeature f) const;
 	virtual void syncSoundSettings();