Crash using tun device

[Victor Snezhko]

Peter Carah <pete at altadena.net> writes:

>> --- netinet6/mld6.c	Wed Nov  9 08:27:14 2005
>> ***************
>> *** 640,645 ****
>> --- 640,649 ----
>>   		mld6_stop_listening(in6m);
>>   		ifma->ifma_protospec = NULL;
>>   		LIST_REMOVE(in6m, in6m_entry);
>> + 		if (in6m->in6m_timer != IN6M_TIMER_UNDEF)
>> + 			mld_stoptimer(in6m);
>>   		free(in6m->in6m_timer_ch, M_IP6MADDR);
>>   		free(in6m, M_IP6MADDR);
>>   	}
>> 
>> 
>
> ....
>
> It helps completely - I'm talking to my mail server using ppp over verizon
> right now.  It may not have rebooted if you had invariant_support or invariants
> enabled - those tend to panic in cases that would otherwise reboot or crash,
> especially with free of a block with a pending callback :-); I normally don't
> enable those (nor witness) on my laptop - too slow.

Aha, I didn't know this.

> I run current on two other systems, though, one of which sometimes
> gets invariant_support.  I don't care about LOR or other such unless
> I see mysterious hangs - even then I normally just mail the list...
> Also my ppp never uses ip6 (but ethernet sometimes does), so it
> wouldn't hurt most of the time to disable it. 

Userland ppp does use IPv6 syscalls by default. This causes netinet6
bugs to influence ppp behaviour.

>> The bug I mentioned was committed on Oct 21.
>> 
>> If the fix don't help, try to disable INET6 and see if that helps.
> Did help.  Thank you.

-- 
WBR, Victor V. Snezhko
EMail: snezhko at indorsoft.ru