I've recently installed Fedora (v9 I think).
I'm using a Huawei E220 USB modem. It has been working fine for most of the time, but periodically the connection hangs and the troubleshooter flags up a message.
Recently, it has got significantly worse, to the extent that it will probably take me three goes at connecting to post this query (so apologies in advance if I do it twice).

Error messages (in order of frequency):
SELinux is preventing NetworkManager (NetworkManager_t) "sigkill" to <Unknown> (pppd_t).
SELinux is preventing gdb (NetworkManager_t) "write" to ./rpm (rpm_var_lib_t).
SELinux is preventing gdb (NetworkManager_t) "search" to ./rpm (rpm_var_lib_t).
SELinux is preventing gdb (NetworkManager_t) "getattr" to /var/lib/rpm (rpm_var_lib_t).

They all have much the same "detailed description":
"SELinux denied access requested by gdb. It is not expected that this access is required by gdb and this access may signal an intrusion attempt. It is also possible that the specific version or configuration of the application is causing it to require additional access."

And now, it keeps giving me kernel failures. I've had to resort to Windows to get back online.
That does show it isn't the hardware gone wrong.

So how do I fix it, and (pardon me being stupid) how do I file a bug report?

The first rule looks OK, the second one makes me wonder why NetworkManager is using 'gdb' in the first place and secondly why it *should* write to "./rpm" (RPM configuration stuff, referred to as being part of the rpm_var_lib "domain"). A workaround could be to make a local SE Linux policy:
but you might want to first check the Fedora site for SE Linux differences between this approach and how it should be done with F9. The same site should show a link to the Fedora bug tracker (bugzilla.redhat.com?)