perl/perl-5.33.0-reentr.c-Prevent-infinite-looping.patch

47 lines
1.4 KiB
Diff

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