** Description changed: - In some conditions, propagating a kerberos database to a slave KDC server can stall. + In some conditions, propagating a kerberos database to a slave KDC server or performing other database operations can stall. As we've investigated the issue, it looks like a database with more than a few hundred principals is very likely to run into this issue. This is due to a misoptimization by gcc 4.8 of the CIRCLEQ famliy of macros, apparently due to overzealous strict aliasing deductions. One case of this stall is reported at http://mailman.mit.edu/pipermail/kerberos/2014-July/020007.html (and the rest of the thread), and there is an entry in the upstream bugtracker at http://krbdev.mit.edu/rt/Ticket/Display.html?id=7860 . gcc 4.9 (as used in Debian unstable at present) is not believed to induce this problem. Upstream has patched their code to use the TAILQ family of macros instead, as a workaround, but that workaround has not yet appeared in an upstream release: https://github.com/krb5/krb5/commit/26d8744129 + A branch is linked including this upstream work around and two other + patches to bugs already nominated for trusty applied to the krb5 in + trusty. We believe the impact is significant because this is likely to + be a problem for sites with a large database running trusty. The + regression potential is very small. The upstream work around changes + from one family of queue macros that are stable and well-tested to + another. + + For utopic, the simplest fix is to rebuild krb5 with the compiler + currently in utopic. An alternative is to request that the Debian + maintainers (both monitoring this bug for such a request) upload the + upstream work around to Debian and sync that. You could do an ubuntu- + specific upload but it seems undesirable to introduce a change between + Ubuntu and Debian when all the right parties are happy to avoid it. + Because of the different compiler versions used on Debian and Ubuntu, I am filing this as an Ubuntu-specific bug.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1347147 Title: krb5 database operations enter infinite loop To manage notifications about this bug go to: https://bugs.launchpad.net/gcc/+bug/1347147/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
