Created attachment 598214 [details] strace of s-c-f misbehaving Description of problem: When system-config-firewall authenticates to a user that isn't the current one (see https://bugzilla.redhat.com/show_bug.cgi?id=840173), it can get into a state where it and X can each use a complete CPU core. Version-Release number of selected component (if applicable): system-config-firewall-1.2.29-4.fc16.noarch system-config-firewall-tui-1.2.29-4.fc16.noarch system-config-firewall-base-1.2.29-4.fc16.noarch How reproducible: With a policykit bug (https://bugzilla.redhat.com/show_bug.cgi?id=840173), I could reproduce it any time. I've now deleted the dummy user and cannot reproduce it. I suspect that you could duplicate it with an apporpriate "su - user" command. Steps to Reproduce: 1.run system-config-firewall 2.authenticate (as asked) for a different user 3.try to apply a change Actual results: X server and system-config-firewall eat the processor. quit command won't work. Expected results: more graceful error handling Additional info: See attached strace log. This strace was started while system-config-firewall was misbehaving so it does not catch the start. Clearly the code is doing poll(2) syscalls and not paying attention to the result. For example, the first poll call says it ended due to timeout and that fd 4 is not ready for reading. So what is the next thing that s-c-f tries to do? Read from fd 4! This pattern is repeated a lot. All poll calls seem to specify a timeout of 0, a recipe for eating CPU. My guess: this is all X calls. X doesn't think that the dummy user ought to be able to write to the display (it isn't his display). So all X calls fail.
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Fedora 16 changed to end-of-life (EOL) status on 2013-02-12. Fedora 16 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. Thank you for reporting this bug and we are sorry it could not be fixed.