Strange armv7 Rawhide infinite loop problem

Richard W.M. Jones rjones at redhat.com
Sun May 17 14:47:26 UTC 2015


https://bugzilla.redhat.com/show_bug.cgi?id=1222286

Can you help to identify the component responsible for this bug?

The symptoms: Just running:

  qemu-system-arm -help

hangs on Rawhide.  But only on armv7 (not x86), and only in Koji (or
at least, I've so far only been able to reproduce the problem in
Koji).

I managed to obtain an strace:

  https://kojipkgs.fedoraproject.org//work/tasks/7470/9767470/build.log

and it is weird.  The process seems to go into a tight infinite loop
after opening /dev/urandom.

It looks like its happening in a library constructor function, before
main() in the qemu binary.  It might be related to libselinux, as that
is the last identifiable library that is being run.

Unfortunately I've so far failed to get a stack trace (using
libSegFault.so).

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
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