IGMP+WiFi panic on recent kernel - in igmp_fasttimo()
Bruce Simpson
bms at incunabulum.net
Tue Mar 17 06:41:58 PDT 2009
Coleman Kane wrote:
> If you are looking for a reliable test case, this might be it for you,
> but I think you need a wlan interface to test it with:
> * Install net/avahi from ports
> * Set avahi_daemon_enable="YES" in rc.conf
> * Configure VAP params for wlan0 card in rc.conf
> * Log in and run "dhclient wlan0" to trigger the panic
>
>
Actually I was able to panic the kernel right away with the 802.11 code,
just
by joining a multicast group with mtest(8) on the wlan interface.
i.e.
# mtest
j 224.0.0.2 192.168.x.x
-> boom
I believe I've found the symptom, but the root cause I don't fully
understand.
Sam indicated that the VAP code is using ifma's in some nested way between
the ifnets which comprise the VAP's member interfaces.
A workaround is pending....
cheers
BMS
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