perl/perl-5.33.0-reentr.c-Buffer-sizes-for-asctime_r-ctime_r-are-smal.patch

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From 81169c06a76f62ff987ed990ac910c2ae08b3f91 Mon Sep 17 00:00:00 2001
From: Karl Williamson <khw@cpan.org>
Date: Tue, 10 Mar 2020 15:19:57 -0600
Subject: [PATCH] reentr.c: Buffer sizes for asctime_r,ctime_r are small
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
The needed sizes of these are stated in the man pages, and are much
smaller than were being allocated.
Signed-off-by: Petr Písař <ppisar@redhat.com>
---
reentr.c | 4 ++--
regen/reentr.pl | 5 ++++-
2 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/reentr.c b/reentr.c
index 8ddda7bfc0..8438c8f90f 100644
--- a/reentr.c
+++ b/reentr.c
@@ -52,14 +52,14 @@ Perl_reentrant_size(pTHX) {
# define REENTRANTUSUALSIZE 4096 /* Make something up. */
# ifdef HAS_ASCTIME_R
- PL_reentrant_buffer->_asctime_size = REENTRANTSMALLSIZE;
+ PL_reentrant_buffer->_asctime_size = 26;
# endif /* HAS_ASCTIME_R */
# ifdef HAS_CRYPT_R
# endif /* HAS_CRYPT_R */
# ifdef HAS_CTIME_R
- PL_reentrant_buffer->_ctime_size = REENTRANTSMALLSIZE;
+ PL_reentrant_buffer->_ctime_size = 26;
# endif /* HAS_CTIME_R */
# ifdef HAS_GETGRNAM_R
diff --git a/regen/reentr.pl b/regen/reentr.pl
index f5788c7ad9..94721e9dec 100644
--- a/regen/reentr.pl
+++ b/regen/reentr.pl
@@ -495,8 +495,11 @@ for my $func (@seenf) {
char* _${func}_buffer;
size_t _${func}_size;
EOF
+ my $size = ($func =~ /^(asctime|ctime)$/)
+ ? 26
+ : "REENTRANTSMALLSIZE";
push @size, <<EOF;
- PL_reentrant_buffer->_${func}_size = REENTRANTSMALLSIZE;
+ PL_reentrant_buffer->_${func}_size = $size;
EOF
pushinitfree $func;
pushssif $endif;
--
2.25.4