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