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From: "peterzhu2118 (Peter Zhu) via ruby-core" <ruby-core@ml.ruby-lang.org>
To: ruby-core@ml.ruby-lang.org
Cc: "peterzhu2118 (Peter Zhu)" <noreply@ruby-lang.org>
Subject: [ruby-core:116514] [Ruby master Bug#20228] Memory leak in Regexp timeout
Date: Tue, 30 Jan 2024 19:29:26 +0000 (UTC)	[thread overview]
Message-ID: <redmine.issue-20228.20240130192925.42491@ruby-lang.org> (raw)
In-Reply-To: redmine.issue-20228.20240130192925.42491@ruby-lang.org

Issue #20228 has been reported by peterzhu2118 (Peter Zhu).

----------------------------------------
Bug #20228: Memory leak in Regexp timeout
https://bugs.ruby-lang.org/issues/20228

* Author: peterzhu2118 (Peter Zhu)
* Status: Open
* Priority: Normal
* Backport: 3.0: UNKNOWN, 3.1: DONTNEED, 3.2: REQUIRED, 3.3: REQUIRED
----------------------------------------
GitHub PR: https://github.com/ruby/ruby/pull/9765

If a Regexp::TimeoutError is raised, the `stk_base` and `OnigRegion` will leak.

For example:

```ruby
Regexp.timeout = 0.001
regex = /^(a*)*$/
str = "a" * 1000000 + "x"

10.times do
  100.times do
    begin
      regex =~ str
    rescue
    end
  end

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

Before:

```
328800
632416
934368
1230448
1531088
1831248
2125072
2414384
2703440
2995664
```

After:

```
39280
47888
49024
56240
56496
56512
56592
56592
56720
56720
```



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       reply	other threads:[~2024-01-30 19:29 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-01-30 19:29 peterzhu2118 (Peter Zhu) via ruby-core [this message]
2024-01-31  0:57 ` [ruby-core:116520] [Ruby master Bug#20228] Memory leak in Regexp timeout nobu (Nobuyoshi Nakada) via ruby-core
2024-01-31  4:12 ` [ruby-core:116522] " mame (Yusuke Endoh) via ruby-core
2024-01-31 16:30 ` [ruby-core:116526] " peterzhu2118 (Peter Zhu) via ruby-core
2024-03-20 16:34 ` [ruby-core:117265] " naruse (Yui NARUSE) via ruby-core

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