From 7571ad42f42939d172ec9a68dfe56aac724ee2ef Mon Sep 17 00:00:00 2001
From: Peter Zhu <peter@peterzhu.ca>
Date: Thu, 25 Jul 2024 12:14:26 -0400
Subject: [Bug #20650] Fix memory leak in Regexp capture group when timeout
 (#11244)

Fix memory leak in Regexp capture group when timeout

[Bug #20650]

The capture group allocates memory that is leaked when it times out.

For example:

    re = Regexp.new("^#{"(a*)" * 10_000}x$", timeout: 0.000001)
    str = "a" * 1000000 + "x"

    10.times do
      100.times do
        re =~ str
      rescue Regexp::TimeoutError
      end

      puts `ps -o rss= -p #{$$}`
    end

Before:

    34688
    56416
    78288
    100368
    120784
    140704
    161904
    183568
    204320
    224800

After:

    16288
    16288
    16880
    16896
    16912
    16928
    16944
    17184
    17184
    17200
---
 include/ruby/onigmo.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'include/ruby')

diff --git a/include/ruby/onigmo.h b/include/ruby/onigmo.h
index d233336316..db290cd47a 100644
--- a/include/ruby/onigmo.h
+++ b/include/ruby/onigmo.h
@@ -636,6 +636,7 @@ ONIG_EXTERN const OnigSyntaxType*   OnigDefaultSyntax;
 #define ONIGERR_PARSE_DEPTH_LIMIT_OVER                        -16
 #define ONIGERR_DEFAULT_ENCODING_IS_NOT_SET                   -21
 #define ONIGERR_SPECIFIED_ENCODING_CANT_CONVERT_TO_WIDE_CHAR  -22
+#define ONIGERR_TIMEOUT                                       -23
 /* general error */
 #define ONIGERR_INVALID_ARGUMENT                              -30
 /* syntax error */
-- 
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