[ruby-core:118470] [Ruby master Bug#20228] Memory leak in Regexp timeout
From:
"nagachika (Tomoyuki Chikanaga) via ruby-core" <ruby-core@...>
Date:
2024-07-07 05:24:41 UTC
List:
ruby-core #118470
Issue #20228 has been updated by nagachika (Tomoyuki Chikanaga).
Backport changed from 3.0: UNKNOWN, 3.1: DONTNEED, 3.2: REQUIRED, 3.3: DONE to 3.0: UNKNOWN, 3.1: DONTNEED, 3.2: WONTFIX, 3.3: DONE
I gave up to make a clean patch for ruby_3_2 branch. Please make PR if you want to backport.
----------------------------------------
Bug #20228: Memory leak in Regexp timeout
https://bugs.ruby-lang.org/issues/20228#change-108984
* Author: peterzhu2118 (Peter Zhu)
* Status: Closed
* Backport: 3.0: UNKNOWN, 3.1: DONTNEED, 3.2: WONTFIX, 3.3: DONE
----------------------------------------
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
```
--
https://bugs.ruby-lang.org/
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