Issue #20239 has been updated by nagachika (Tomoyuki Chikanaga). Backport changed from 3.2: REQUIRED, 3.3: REQUIRED to 3.2: DONE, 3.3: REQUIRED ruby_3_2 commit:2b35d80834f14011f7d313f8fac7855dc9949f70 merged revision(s) commit:75aaeb35b82da26359b9418d2963384d0c55839c. ---------------------------------------- Bug #20239: Segmentation fault when using Regex on a large String https://bugs.ruby-lang.org/issues/20239#change-108978 * Author: martinsp (Martins Polakovs) * Status: Closed * ruby -v: ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [aarch64-linux] * Backport: 3.2: DONE, 3.3: REQUIRED ---------------------------------------- Since v3.2.0 ruby crashes with segmentation fault on the following script with a `[BUG] Segmentation fault at ...` ``` ruby require "rbconfig/sizeof" ("\u{0101}" + "a" * RbConfig::LIMITS["INT_MAX"] + "b").match(/b/) ``` Crash can be reproduced on the following ruby versions: - ruby 3.2.0 (2022-12-25 revision a528908271) [aarch64-linux] - ruby 3.2.3 (2024-01-18 revision 52bb2ac0a6) [aarch64-linux] - ruby 3.3.0 (2023-12-25 revision 5124f9ac75) [aarch64-linux] ruby 3.1.4p223 (2023-03-30 revision 957bb7cb81) [aarch64-linux] works as expected It seems that call to `enclen` inside `str_lower_case_match` returns negative offset in this case https://bugs.ruby-lang.org/projects/ruby-master/repository/git/revisions/v3_... -- https://bugs.ruby-lang.org/