75 lines
2.3 KiB
Diff
75 lines
2.3 KiB
Diff
From 5f41fa466a67b5535aa8bcf4b814f242545ac7bd Mon Sep 17 00:00:00 2001
|
|
From: Karl Williamson <khw@cpan.org>
|
|
Date: Sat, 27 Feb 2021 11:43:41 -0700
|
|
Subject: [PATCH] regcomp.c: Remove memory leak
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
This fixes GH #18604. There was a path through the code where a
|
|
particular SV did not get its reference count decremented.
|
|
|
|
I did an audit of the function and came up with several other
|
|
possiblities that are included in this commit.
|
|
|
|
Further, there would be leaks for some instances of finding syntax
|
|
errors in the input pattern, or when warnings are fatalized. Those
|
|
would require mortalizing some SVs, but that is beyond the scope of this
|
|
commit.
|
|
|
|
Signed-off-by: Petr Písař <ppisar@redhat.com>
|
|
---
|
|
regcomp.c | 7 +++++++
|
|
t/op/svleak.t | 3 ++-
|
|
2 files changed, 9 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/regcomp.c b/regcomp.c
|
|
index e44c7a37e5..f5e5f581dc 100644
|
|
--- a/regcomp.c
|
|
+++ b/regcomp.c
|
|
@@ -18765,6 +18765,12 @@ S_regclass(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth,
|
|
RExC_end = save_end;
|
|
RExC_in_multi_char_class = 0;
|
|
SvREFCNT_dec_NN(multi_char_matches);
|
|
+ SvREFCNT_dec(properties);
|
|
+ SvREFCNT_dec(cp_list);
|
|
+ SvREFCNT_dec(simple_posixes);
|
|
+ SvREFCNT_dec(posixes);
|
|
+ SvREFCNT_dec(nposixes);
|
|
+ SvREFCNT_dec(cp_foldable_list);
|
|
return ret;
|
|
}
|
|
|
|
@@ -20122,6 +20128,7 @@ S_regclass(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth,
|
|
RExC_parse - orig_parse);;
|
|
SvREFCNT_dec(cp_list);;
|
|
SvREFCNT_dec(only_utf8_locale_list);
|
|
+ SvREFCNT_dec(upper_latin1_only_utf8_matches);
|
|
return ret;
|
|
}
|
|
|
|
diff --git a/t/op/svleak.t b/t/op/svleak.t
|
|
index 6acc298c3d..3df4838be8 100644
|
|
--- a/t/op/svleak.t
|
|
+++ b/t/op/svleak.t
|
|
@@ -15,7 +15,7 @@ BEGIN {
|
|
|
|
use Config;
|
|
|
|
-plan tests => 150;
|
|
+plan tests => 151;
|
|
|
|
# run some code N times. If the number of SVs at the end of loop N is
|
|
# greater than (N-1)*delta at the end of loop 1, we've got a leak
|
|
@@ -278,6 +278,7 @@ eleak(2,0,'/[[:ascii:]]/');
|
|
eleak(2,0,'/[[.zog.]]/');
|
|
eleak(2,0,'/[.zog.]/');
|
|
eleak(2,0,'/|\W/', '/|\W/ [perl #123198]');
|
|
+eleak(2,0,'/a\sb/', '/a\sb/ [GH #18604]');
|
|
eleak(2,0,'no warnings; /(?[])/');
|
|
eleak(2,0,'no warnings; /(?[[a]+[b]])/');
|
|
eleak(2,0,'no warnings; /(?[[a]-[b]])/');
|
|
--
|
|
2.26.2
|
|
|