[squid-users] pinger crash - Bad opcode: 112

[Tomas Mozes]

On Thu, May 26, 2016 at 8:04 AM, Amos Jeffries <squid3 at treenet.co.nz> wrote:

> On 24/05/2016 7:52 p.m., Tomas Mozes wrote:
> > Hello,
> > on two different squid servers I've observed a crash of pinger. First it
> > appeared on version 3.5.15 and later on version 3.5.17.
> >
> > Cache.log contains these lines:
> >
> > (pinger): Address.cc:671: void Ip::Address::getAddrInfo(addrinfo*&, int)
> > const: Assertion `false' failed.
> > 2016/05/14 21:55:25 kid1| Bad opcode: 112 from
> > [6661:6c73:6522:2061:7420:6c69:6e65:2036]
> > 2016/05/14 21:59:13 kid1| recv: (111) Connection refused
> > 2016/05/14 21:59:13 kid1| Closing Pinger socket on FD 17
> >
> > On both servers, that IPv6 address was the same -
> > 6661:6c73:6522:2061:7420:6c69:6e65:2036
> >
>
> That is the hexadecimal representation of the error:
>  false" at line 6
>
> Which means that your kernel is producing garbage when asked to resolve
> an IPv6 address or respond to an ICMPv6 packet.
>

Cannot we prevent Squid from crashing in these cases?


>
>
> > A quick google search for that showed problems with Squid from the past:
> > http://www.squid-cache.org/mail-archive/squid-users/201301/0251.html
> >
> > The strange thing is that I have IPv6 disabled in the system (not even
> as a
> > module in the Linux kernel) and Squid was compiled without ipv6 support.
> >
>
> Support for IPv6 has been mandatory for all IP network connected devices
> since 2012.
>
> "Disabling" IPv6 in Squid simply means it will not attempt to use IPv6
> for HTTP connections. It must still be able to identify IPv6 addresses.
> Which requires kernel support for IPv6.
>
> If you don't want IPv6 to take place "the right way" to do it is to
> configure your network interfaces not to have IPv6 address assignments
> and your machines firewall to block IPv6 traffic.
>
> Amos
>
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