Package: perl
Version: 5.26.1-4
Severity: important
Tags: patch fixed-upstream
Forwarded: https://rt.perl.org/Public/Bug/Display.html?id=132892
As reported by 郭樂聰 in the upstream bug, this leaks memory:
% perl -e 'my %h=(qr/a/ => 1); while (1) { /$_/ for keys %h}'
This regressed in 5.25.5 with
https://perl5.git.perl.org/perl.git/commit/b10cb25a6c86fd96fff8f2dfa6d8df3e6b51a451
and was fixed recently in blead by
https://perl5.git.perl.org/perl.git/commit/910a6a8be166fb3780dcd2520e3526e537383ef2
which I'm attaching as well.
--
Niko Tyni nt...@debian.org
>From 910a6a8be166fb3780dcd2520e3526e537383ef2 Mon Sep 17 00:00:00 2001
From: Yves Orton <demer...@gmail.com>
Date: Fri, 23 Feb 2018 04:13:49 +0100
Subject: [PATCH] perl #132892: avoid leak by mortalizing temporary copy of
pattern
---
regcomp.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/regcomp.c b/regcomp.c
index 34ac9169f2..446f0bf839 100644
--- a/regcomp.c
+++ b/regcomp.c
@@ -6515,8 +6515,8 @@ S_concat_pat(pTHX_ RExC_state_t * const pRExC_state,
pat = msv;
} else {
/* a string with no trailing null, we need to copy it
- * so it we have a trailing null */
- pat = newSVsv(msv);
+ * so it has a trailing null */
+ pat = sv_2mortal(newSVsv(msv));
}
}
--
2.16.1
