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authordgp <dgp@users.sourceforge.net>2009-08-27 19:33:24 (GMT)
committerdgp <dgp@users.sourceforge.net>2009-08-27 19:33:24 (GMT)
commit14e37320188438c6023b68c3df2d4349c214b647 (patch)
tree0572abff10b86bec0beb74b6336b7ae435ad90b5 /generic/tclStringObj.c
parente7db7cb93b3463acbc2912f03a8693b8afedbac9 (diff)
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* generic/tclStringObj.c: A few more string overflow cases in
[format]. [Bug 2845535]
Diffstat (limited to 'generic/tclStringObj.c')
-rw-r--r--generic/tclStringObj.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/generic/tclStringObj.c b/generic/tclStringObj.c
index 6e202d5..2289659 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 1.70.2.17 2009/07/31 16:56:32 dgp Exp $ */
+ * RCS: @(#) $Id: tclStringObj.c,v 1.70.2.18 2009/08/27 19:33:24 dgp Exp $ */
#include "tclInt.h"
#include "tommath.h"
@@ -2363,6 +2363,10 @@ Tcl_AppendFormatToObj(
if (gotPrecision) {
*p++ = '.';
p += sprintf(p, "%d", precision);
+ if (precision > INT_MAX - length) {
+ msg=overflow;
+ goto errorMsg;
+ }
length += precision;
}
@@ -2375,9 +2379,15 @@ 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: