From 5dfa918023df4ec9c5cbd4fe567ee509328f8d4f Mon Sep 17 00:00:00 2001 From: dgp Date: Mon, 5 Feb 2018 13:33:21 +0000 Subject: [PATCH 0878/1800] Improved overflow prevention. --- generic/tclStringObj.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/generic/tclStringObj.c b/generic/tclStringObj.c index ae75e449e..8437555ed 100644 --- a/generic/tclStringObj.c +++ b/generic/tclStringObj.c @@ -140,8 +140,8 @@ GrowStringBuffer( objPtr->bytes = NULL; } if (flag == 0 || stringPtr->allocated > 0) { - attempt = 2 * needed; - if (attempt >= 0) { + if (needed <= INT_MAX / 2) { + attempt = 2 * needed; ptr = attemptckrealloc(objPtr->bytes, attempt + 1); } if (ptr == NULL) { -- 2.19.1