Hi Eric, Thank you for your quick reply! This information might be interesting for the developers of mod_auth_openidc. I will show them your message and report back here if we manage to solve the issue.
Best, Simon -----Ursprüngliche Nachricht----- Von: Eric Covener <cove...@gmail.com> Gesendet: Montag, 2. März 2020 17:01 An: users@httpd.apache.org Betreff: Re: [users@httpd] Segmentation faults on graceful reload of Apache httpd with APR 1.7.0 and mod_auth_openidc On Mon, Mar 2, 2020 at 10:59 AM Eric Covener <cove...@gmail.com> wrote: > > On Mon, Mar 2, 2020 at 9:50 AM <simon.stu...@post.ch> wrote: > > > > Hi everyone, > > > > We have been having issues with segmentation faults on graceful restarts of > > Apache httpd in combination with the module mod_auth_openidc. > > > > After a back and forth with one of the developers over on Github, we came > > to the finding that the segmentation faults occur with version 1.7.0 of the > > APR but not version 1.6.5. The full discussion can be found in the Github > > issue at https://github.com/zmartzone/mod_auth_openidc/issues/458. > > > > To reliably reproduce the problem, my coworker created a Docker container > > and uploaded it to Docker Hub at > > https://hub.docker.com/r/ifrido/httpd-openidc-debug with detailed steps to > > produce the segmentation fault on the Overview page. The corresponding > > Dockerfile can be viewed at > > https://hub.docker.com/r/ifrido/httpd-openidc-debug/dockerfile. > > Hi Simon, re: your GH issue and specifically the snippet here: > https://github.com/zmartzone/mod_auth_openidc/issues/458 Argh, meant https://github.com/zmartzone/mod_auth_openidc/issues/458#issuecomment-581413230 > > To me it's a bit bizarre that this SHM cache does cleanups in the > child processes. > The SHM is created by the parent process and would normally be > destroyed in the parent process. This would be the usual handling of > shared memory AFAICT. > > Since "context" itself is not in shared memory, there is no way for > one child to tell another that it has destroyed the SHM segment. > Also, nothing modules should not really write to the pointers hung off > their per-module or per-directory apache configs. It is another red > flag in this same short snippet. > > Unless the maintainers have some trivia about why this cleanup of SHM > should run in the parent, I think it's the culprit. -- Eric Covener cove...@gmail.com --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@httpd.apache.org For additional commands, e-mail: users-h...@httpd.apache.org
