Hello ludovit, We experienced the similar problems of crashing squid with "signal 6 and status 0" symptoms in the /var/log/messages. There were hundreds of crashes per hour during the working hours. There were also many crashes during night hours. And I had no idea what the cause of the problem was. But your case shed light on the problem.
I captured network traffic and saw in the dump many requests to IPv6 addresses like this: POST http://[2001:67c:4e8:f004::a]:80/api HTTP/1.1\r\n I think that the requests were generated by the Telegram application, because neighboring similar requests were addressed to Telegram IPv4 pools: POST http://91.105.192.100:80/api HTTP/1.1\r\n To fix the problem somehow, I added the following rules to the very beginning of the SQUID configuration: acl urldst_ipv6 url_regex ^http://\[ http_access deny urldst_ipv6 Now it seems the problem has been solved. I was wondering if this is a SQUID bug. In my opinion, SQUID should not crash on requests to IPv6 resources, but should send a response with an error, for example, Bad gateway 502, or Not Acceptable 406. Kind regards, Ankor. ср, 12 окт. 2022 г. в 15:30, Ludovit Koren <ludovit.ko...@gmail.com>: > >>>>> Amos Jeffries <squ...@treenet.co.nz> writes: > > > On 12/10/22 21:12, Ludovit Koren wrote: > >> Hi, > >> I am running squid-5.7 on FreeBSD 12.3-STABLE r371879. Occasionally > >> I > >> get the following error: > >> > > >> #3 0x000000080111fcb1 in __assert (func=<optimized out>, > file=<optimized out>, line=<optimized out>, failedexpr=<optimized out>) at > /usr/src/lib/libc/gen/assert.c:51 > >> #4 0x0000000000698fcd in Ip::Address::getAddrInfo > (this=0x861c04588, dst=<optimized out>, force=0) at Address.cc:663 > >> #5 0x000000000068b732 in comm_openex (sock_type=sock_type@entry=1, > proto=proto@entry=6, addr=..., flags=1, note=0x85ce42dc0 > "[fe80::21f:29ff:fe28:7017]") at comm.cc:347 > > ... > > >> The squid is compiled without IPv6 option, so I do not understand > >> why it > >> tries to reach IPv6 address. > >> > > > A client is requiring connection to an IPv6 server. But Squid cannot > > convert that IPv6 address or use on an IPv4-only network. Lack of > IPv6 > > support also forbids IPv6 failover handling being used. > > So the solution is to reenable IPv6 in the squid, as well as in the OS > network stack? Am I right? > > Thank you. > > Regards, > > lk > _______________________________________________ > squid-users mailing list > squid-users@lists.squid-cache.org > http://lists.squid-cache.org/listinfo/squid-users >
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