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-rw-r--r--generic/tclExecute.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/generic/tclExecute.c b/generic/tclExecute.c
index 657ac80..065024c 100644
--- a/generic/tclExecute.c
+++ b/generic/tclExecute.c
@@ -11,7 +11,7 @@
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tclExecute.c,v 1.94.2.27 2008/07/23 04:08:00 dgp Exp $
+ * RCS: @(#) $Id: tclExecute.c,v 1.94.2.28 2009/03/20 14:22:54 dgp Exp $
*/
#include "tclInt.h"
@@ -1442,13 +1442,19 @@ TclExecuteByteCode(interp, codePtr)
* First, determine how many characters are needed.
*/
- for (i = (stackTop - (opnd-1)); i <= stackTop; i++) {
+ for (i = (stackTop - (opnd-1));
+ totalLen >= 0 && i <= stackTop; i++) {
bytes = Tcl_GetStringFromObj(stackPtr[i], &length);
if (bytes != NULL) {
totalLen += length;
}
}
+ if (totalLen < 0) {
+ Tcl_Panic("max size for a Tcl value (%d bytes) exceeded",
+ INT_MAX);
+ }
+
/*
* Initialize the new append string object by appending the
* strings of the opnd stack objects. Also pop the objects.