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From 981fbfc16220a15e72457d8ece4e014988746946 Mon Sep 17 00:00:00 2001
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From: Karl Williamson <khw@cpan.org>
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Date: Thu, 12 Mar 2020 12:48:47 -0600
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Subject: [PATCH] reentr.c: Prevent infinite looping
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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This is an easy, though paranoid hedge to prevent something that should
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never happen from causing an infinite loop if it were to happen.
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Signed-off-by: Petr Písař <ppisar@redhat.com>
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---
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reentr.c | 2 +-
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regen/reentr.pl | 2 +-
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2 files changed, 2 insertions(+), 2 deletions(-)
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diff --git a/reentr.c b/reentr.c
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index 8438c8f90f..2429aa2f5d 100644
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--- a/reentr.c
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+++ b/reentr.c
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@@ -36,7 +36,7 @@
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#define RenewDouble(data_pointer, size_pointer, type) \
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STMT_START { \
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- const size_t size = *(size_pointer) * 2; \
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+ const size_t size = MAX(*(size_pointer), 1) * 2; \
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Renew((data_pointer), (size), type); \
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*(size_pointer) = size; \
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} STMT_END
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diff --git a/regen/reentr.pl b/regen/reentr.pl
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index 94721e9dec..ba2e1c8fa6 100644
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--- a/regen/reentr.pl
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+++ b/regen/reentr.pl
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@@ -818,7 +818,7 @@ print $c <<"EOF";
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#define RenewDouble(data_pointer, size_pointer, type) \\
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STMT_START { \\
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- const size_t size = *(size_pointer) * 2; \\
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+ const size_t size = MAX(*(size_pointer), 1) * 2; \\
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Renew((data_pointer), (size), type); \\
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*(size_pointer) = size; \\
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} STMT_END
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--
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2.25.4
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