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