altq on ng0 sometimes causing system panic

[Gleb Smirnoff]

On Mon, Sep 11, 2006 at 02:32:19AM +0200, Volker wrote:
V> two or three weeks ago I've switched from userland ppp to mpd for my
V> internet connection. While using ng0 as the public interface I'm
V> also using altq (cbq) for bw management.
V> 
V> Everything works (haven't yet measured for queue effectiveness) but
V> when issuing a `pfctl -gf mypf.conf' sometimes the system will
V> panic. I need to reload my ruleset as soon as the internet
V> connection has been set up because I've been lazy and am not using
V> anchors so I'm just reloading my complete ruleset by a link-up
V> script. I've been able to panic the machine just by reloading the
V> ruleset manually several times in a row.
V> 
V> As I currently don't have a serial console setup I'm unable to post
V> any dumps or panic messages. Has anyone else experienced that? I've
V> had queue statements in my pf rules before (even while using ppp and
V> knowing about the problems with altq and tun) I've never experienced
V> any panics. This is really just since changing from a tun to an ng
V> device.
V> 
V> If no one else has experienced panics like this I'll go and hook up
V> the serial console and try to get a panic again. Current workaround
V> is not to use altq on ng0 so I don't get panics ATM.
V> 
V> Running RELENG_6, almost recently csup'ed.

Please *show* the panic message and the backtrace.

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Totus tuus, Glebius.
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