[ruby-core:82389] [Ruby trunk Bug#13412] Infinite recursion with define_method may cause silent SEGV or cfp consistency error

Issue #13412 has been updated by mtsmfm (Fumiaki Matsushima).


I reproduced this bug with 2.2.7, 2.3.4, 2.4.1.

~~~
docker run ruby:2.2.7-alpine ruby -e 'define_method(:foo) { foo }; loop { 1.times { 1.times { begin; foo; rescue Exception; nil; end } } }'
docker run ruby:2.3.4-alpine ruby -e 'define_method(:foo) { foo }; loop { 1.times { 1.times { begin; foo; rescue Exception; nil; end } } }'
docker run ruby:2.4.1-alpine ruby -e 'define_method(:foo) { foo }; loop { 1.times { 1.times { begin; foo; rescue Exception; nil; end } } }'
~~~


----------------------------------------
Bug #13412: Infinite recursion with define_method may cause silent SEGV or cfp consistency error
https://bugs.ruby-lang.org/issues/13412#change-66186

* Author: wanabe (_ wanabe)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: ruby 2.5.0dev (2017-04-09 trunk 58286) [x86_64-linux]
* Backport: 2.2: UNKNOWN, 2.3: UNKNOWN, 2.4: UNKNOWN
----------------------------------------
The script causes silent (no output [BUG]) SEGV or "cfp consistency error" on my environment.

```ruby
define_method(:foo) { foo }

loop do
  1.times do
    1.times do
      begin
        foo
      rescue Exception
        nil
      end
    end
  end
end
```

I think this is related to #11430 (maybe same).

---Files--------------------------------
stderr.log (6.96 KB)
bug.rb (123 Bytes)
bug.sh (775 Bytes)
bug13412.r58331.patch (689 Bytes)
bug13412.r58367.patch (711 Bytes)
bug_stat.sh (296 Bytes)
bug.sh (786 Bytes)
bug_stat.sh (468 Bytes)
bug13412.r58367.patch (1 KB)
cfp_before_setjmp.patch (2.09 KB)
ensure_stack.patch (850 Bytes)
get_tagged_next_cfp.patch (3.33 KB)


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