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See: https://github.com/ClusterLabs/libqb/pull/231 https://github.com/ClusterLabs/pacemaker/pull/1166 It's to handle corner cases there were covered prior to CVE fix in pacemaker, and while those corner cases should in fact be next to impossible (unless killing the server process manually), and hence very unlikely in production, it's better to at least partially close the gap that has been opened + allow for less problemating test runs of pacemaker using work-in-progress development versions (so that resources are not exhausted when something goes wrong).
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2017:1896