Re: Panic / wedge from bridging tap and vlan

On Tue, Feb 04, 2025 at 02:11:33AM +0000, John Klos wrote:
> Hi, all,
> 
> I may've written about this before, but in case I didn't, I just set up a
> bridge between a tap interface which is used by tinc (pkgsrc/net/tinc) and a
> vlan.
> 
> It worked, but the moment I tried to use it, the machine became
> unresponsive. I couldn't enter the kernel debugger because of USB keyboard,
> but I got some info after reboot:
> 
> ...
> Starting virecover.
> Checking for core dump...
> savecore: check_kmem:429: kum_read msgbuf: _kvm_kvatop(ffffa50855d24000)
> Feb 2 23:03:19 sage savecore: reboot after panic: lock error: Mutex:
> nutex_vector_ente r.548: locking against nyself: lock Oxffffd152aab57080 cpu
> 0 lup 0xffffd152a9aeb480 savecore: reboot after panic: lock error: Mutex:
> mutex_vector_enter ,548: locking agains t myself: lock Oxffffd152aab57080
> cpu 0 lup 0xffffd152a9aeb480
> savecore: system went doun at Sun Feb 2 22:40:05 2025 savecore: uriting
> compressed core to /var/crash/netbsd.1.core.gz
> 
> (phone OCR isn't great)
> 
> Either this shouldn't happen, which is to say that bridging to a vlan should
> work, or this shouldn't be allowed, I'd think.

I use briges on vlans a lot with Xen, no problems ...

-- 
Manuel Bouyer <[email protected]>
     NetBSD: 26 ans d'experience feront toujours la difference
--