Red Hat Bugzilla – Bug 435309
Floating point exception sometimes when running rpm
Last modified: 2009-01-07 04:29:09 EST
Description of problem: When running rpm on one of my xen virtual machines, rpm fails with "Floating point exception". Everything other works well on my machines, no crashes, programs are working. When this happens, for aprox. 90% running rpm or yum (I don't know about other programs) fails with FPE. 10% works well. After some time this fixes itself automatically and then I am unable to reproduce this bug. Version-Release number of selected component (if applicable): rpm-4.4.2.2-7.fc8 kernel-xen-2.6.21.7-2.fc8 How reproducible: sometimes :( Steps to Reproduce: I don't know, how to reproduce. This not happening always, just sometimes. Run "rpm" without parameters. Actual results: Floating point exception Expected results: rpm help page output Additional info: strace output and core file is attached.
Created attachment 296235 [details] rpm core file
Created attachment 296236 [details] strace output
Update: there problems disappear immediatelly after stopping ntpd. Starts aprox. 1-3 minutes after starting ntpd. May be it is a bug of any library in linux + xen + ntpd.
Ok, found it. Comes from statistics calculation: sum_usecs += rpmswDiff(rpmswNow(&end), &begin); rpmsw_type = 1; /* Compute cycles/usec */ rpmsw_cycles = sum_cycles/sum_usecs; If there's no difference between begin of timing and "now", it'll cause division by zero. Normally there is of course a difference, ntpd being involved kinda explains.
Fixed upstream
Do have same problem here....Fedora8 running as dom0 but WITHOUT ntpd....I could sometimes resolv this by restarting xend and libvirt...but only some times. I've discovered at running yum....(probably yum update)....
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I can't reproduce this bug some time. I think this has been fixed and this bug can be closed. Thank you.
rpm-4.4.2.3-3.fc9 has been pushed to the Fedora 9 stable repository. If problems still persist, please make note of it in this bug report.