Comment 6 for bug 290399

This was nominated as a 8.04.3 candidate by Steve Langasek, so here is the SRU report, we won't wait for the other bug to be ready since it's stuck on hardware availability for reproduction.

Hardy SRU report

Bug impact:
In certain conditions groupd, fenced, and dlm_controld all have the potential to enter infinite/tight loops surrounding poll(2) due to a file descriptor being closed and not correctly handled. The poll loop for these daemons checks for POLLHUP, but not POLLERR or POLLNVAL. As such, file descriptors in these states are unhandled.

Versions affected: Hardy
Fix in development branch: Was fixed in >= Intrepid by integration of a later, fixed, upstream release.

Minimal patch: see comment 2 just above.

TEST CASE:
This is difficult to reproduce as it supposes a full RHCS setup and hitting the situation where those daemons enter the loop.

Regression potential:
Looking at the patch, regression potential is very low. It was taken from the RedHat bug and was later successfully integrated in the following RHCS releases. Users running the version from my PPA all reported success without any nasty side-effect.