iij/mruby-regexp-pcre

a lot of group operators may cause segmentation fault

Opened this issue · 2 comments

Deleted user commented 
% mruby -e 'Regexp.new("()" * 4000) =~ ""'

% mruby -e 'Regexp.new("()" * 8191) =~ ""'
zsh: segmentation fault (core dumped)  mruby -e 'Regexp.new("()" * 8191) =~ ""'

% mruby -e 'Regexp.new("()" * 8192) =~ ""'
trace:
        [0] -e:1
-e:1: invalid regular expression (ArgumentError)
count result
4000 ok (30 tries without crash)
5450 ok (30 tries without crash)
5460 crash 1 out of 30+ tries
5470 crash 1 out of 10 tries
5480 crash 1 out of 7,8 tries
5666 crash 1 out of 2 tries
5721 crash 4 out of 5 tries
8191 crash 20 out of 20 tries
8192 error (ArgumentError)

(on OpenBSD5.3/amd64)

Deleted user commented

To define NO_RECURSE in config.h eliminates the issue but it makes pcre_exec() 4 times slower...