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-rw-r--r--generic/tclStringObj.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/generic/tclStringObj.c b/generic/tclStringObj.c
index 9ba62f5..8b33fe1 100644
--- a/generic/tclStringObj.c
+++ b/generic/tclStringObj.c
@@ -33,7 +33,7 @@
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tclStringObj.c,v 1.128 2009/07/31 16:55:58 dgp Exp $ */
+ * RCS: @(#) $Id: tclStringObj.c,v 1.129 2009/08/27 19:34:24 dgp Exp $ */
#include "tclInt.h"
#include "tommath.h"
@@ -2218,6 +2218,10 @@ Tcl_AppendFormatToObj(
if (gotPrecision) {
*p++ = '.';
p += sprintf(p, "%d", precision);
+ if (precision > INT_MAX - length) {
+ msg=overflow;
+ goto errorMsg;
+ }
length += precision;
}
@@ -2230,9 +2234,15 @@ Tcl_AppendFormatToObj(
segment = Tcl_NewObj();
allocSegment = 1;
- Tcl_SetObjLength(segment, length);
+ if (!Tcl_AttemptSetObjLength(segment, length)) {
+ msg = overflow;
+ goto errorMsg;
+ }
bytes = TclGetString(segment);
- Tcl_SetObjLength(segment, sprintf(bytes, spec, d));
+ if (!Tcl_AttemptSetObjLength(segment, sprintf(bytes, spec, d))) {
+ msg = overflow;
+ goto errorMsg;
+ }
break;
}
default: