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-rw-r--r--generic/tclParse.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/generic/tclParse.c b/generic/tclParse.c
index e939ef3..93d1741 100644
--- a/generic/tclParse.c
+++ b/generic/tclParse.c
@@ -13,7 +13,7 @@
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tclParse.c,v 1.25.2.3 2007/10/15 13:29:19 msofer Exp $
+ * RCS: @(#) $Id: tclParse.c,v 1.25.2.4 2009/09/28 21:20:51 dgp Exp $
*/
#include "tclInt.h"
@@ -1019,7 +1019,15 @@ TclExpandTokenArray(parsePtr)
int newCount;
Tcl_Token *newPtr;
+#define MAX_TOKENS (int)(UINT_MAX / sizeof(Tcl_Token))
+
+ if (parsePtr->tokensAvailable == MAX_TOKENS) {
+ Tcl_Panic("max # of tokens for a Tcl parse (%d) exceeded", MAX_TOKENS);
+ }
newCount = parsePtr->tokensAvailable*2;
+ if (newCount > MAX_TOKENS) {
+ newCount = MAX_TOKENS;
+ }
newPtr = (Tcl_Token *) ckalloc((unsigned) (newCount * sizeof(Tcl_Token)));
memcpy((VOID *) newPtr, (VOID *) parsePtr->tokenPtr,
(size_t) (parsePtr->tokensAvailable * sizeof(Tcl_Token)));