4 files changed, 5 insertions, 4 deletions
diff --git a/indra/llmessage/llinstantmessage.cpp b/indra/llmessage/llinstantmessage.cpp
index a9e1ee77ef..57e8a22546 100644
--- a/indra/llmessage/llinstantmessage.cpp
+++ b/indra/llmessage/llinstantmessage.cpp
@@ -61,6 +61,7 @@ const char EMPTY_BINARY_BUCKET[] = "";
 const S32 EMPTY_BINARY_BUCKET_SIZE = 1;
 const U32 NO_TIMESTAMP = 0;
 const std::string SYSTEM_FROM("Second Life");
+const std::string INTERACTIVE_SYSTEM_FROM("F387446C-37C4-45f2-A438-D99CBDBB563B");
 const S32 IM_TTL = 1;
 
 
diff --git a/indra/llmessage/llinstantmessage.h b/indra/llmessage/llinstantmessage.h
index 272e753f3c..f11b649f78 100644
--- a/indra/llmessage/llinstantmessage.h
+++ b/indra/llmessage/llinstantmessage.h
@@ -226,6 +226,7 @@ extern const S32 EMPTY_BINARY_BUCKET_SIZE;
 
 extern const U32 NO_TIMESTAMP;
 extern const std::string SYSTEM_FROM;
+extern const std::string INTERACTIVE_SYSTEM_FROM;
 
 // Number of retry attempts on sending the im.
 extern const S32 IM_TTL;
diff --git a/indra/llmessage/lltemplatemessagebuilder.cpp b/indra/llmessage/lltemplatemessagebuilder.cpp
index 55379fc6fd..fa02456d90 100644
--- a/indra/llmessage/lltemplatemessagebuilder.cpp
+++ b/indra/llmessage/lltemplatemessagebuilder.cpp
@@ -326,7 +326,7 @@ void LLTemplateMessageBuilder::addData(const char *varname, const void *data, EM
 			       << "(" << size << ").  Clamping size and truncating data." << llendl;
 			size = 255;
 			char *truncate = (char *)data;
-			truncate[255] = 0;
+			truncate[254] = 0; // array size is 255 but the last element index is 254
 		}
 
 		// no correct size for MVT_VARIABLE, instead we need to tell how many bytes the size will be encoded as
diff --git a/indra/llmessage/lltemplatemessagereader.cpp b/indra/llmessage/lltemplatemessagereader.cpp
index 6682575ca5..8f56cf2521 100644
--- a/indra/llmessage/lltemplatemessagereader.cpp
+++ b/indra/llmessage/lltemplatemessagereader.cpp
@@ -433,10 +433,9 @@ inline void LLTemplateMessageReader::getString(const char *block, const char *va
 
 inline void LLTemplateMessageReader::getString(const char *block, const char *var, std::string& outstr, S32 blocknum )
 {
-	char s[MTUBYTES];
-	s[0] = '\0';
+	char s[MTUBYTES + 1]= {0}; // every element is initialized with 0
 	getData(block, var, s, 0, blocknum, MTUBYTES);
-	s[MTUBYTES - 1] = '\0';
+	s[MTUBYTES] = '\0';
 	outstr = s;
 }