Date: Fri, 14 Apr 2017 20:13:52 -0700 From: "Ngie Cooper (yaneurabeya)" <yaneurabeya@gmail.com> To: Peter Wemm <peter@wemm.org> Cc: svn-src-all@freebsd.org, src-committers <src-committers@freebsd.org>, Hiroki Sato <hrs@freebsd.org>, Hiren Panchasara <hiren@freebsd.org>, svn-src-head@freebsd.org, Maxim Sobolev <sobomax@sippysoft.com> Subject: Re: svn commit: r316874 - head/sys/kern Message-ID: <CDFAE7DD-8F3A-43D9-AAD5-DF9FABEC4669@gmail.com> In-Reply-To: <2109294.KVn8xeR1jZ@overcee.wemm.org> References: <201704141723.v3EHNS3B043902@repo.freebsd.org> <C976394B-87C9-40E5-A66D-951B77D7982D@gmail.com> <13691757.t3s7Qik7v1@overcee.wemm.org> <2109294.KVn8xeR1jZ@overcee.wemm.org>
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> On Apr 14, 2017, at 20:12, Peter Wemm <peter@wemm.org> wrote:
>=20
> On Friday, April 14, 2017 07:36:55 PM Peter Wemm wrote:
>> On Friday, April 14, 2017 02:14:16 PM Ngie Cooper wrote:
>>>> On Apr 14, 2017, at 14:10, Maxim Sobolev <sobomax@sippysoft.com> =
wrote:
>>>>=20
>>>> Peter, Ngie,
>>>>=20
>>>> Looks like out of that refactoring came a logical bug that is =
present in
>>>> the head, which causes syslod to first to shutdown the socket for
>>>> reading
>>>> and then try to select/recv on it (which is somewhat stupid). And =
that
>>>> issue has been masked by shutdown() on datagram socket becoming
>>>> effectively a NOP in 11 & head 20 months ago. It only affects head
>>>> though, 11-stable still has the old code which does not include =
that
>>>> half-closed socket into the select list. Attached patch is expected =
to
>>>> fix head, Peter, it would be nice if you can give it a try =
(restoring
>>>> latest changes into uipc_sockets.c) and let me know if it helps.
>>>>=20
>>>> Thanks!
>>>=20
>>> CCing hrs@ for input as he did the refactoring.
>>> Thanks!
>>> -Ngie
>>>=20
>>> PS LGTM with the change. Will wait for feedback from wemm@.
>>=20
>> This is definitely not working. I get ENOSPC and listen queue =
overflows on
>> /var/run/logpriv now.
>>=20
>> Grabbing an old 10.3 /usr/sbin/syslogd and placing it on the top of =
the 12.x
>> one worked fine, aside from the include statements.
>=20
> This can't be right:
> if (SecureMode || res->ai_family =3D=3D AF_LOCAL) {
> /* Forbid communication in secure mode. */
> if (shutdown(s, SHUT_RD) < 0 &&
> errno !=3D ENOTCONN) {
> logerror("shutdown");
> if (!Debug)
> die(0);
> }
> dprintf("listening on socket\n");
> sl_recv =3D NULL;
> }
>=20
> This appears to disable unix domain sockets like /var/run/log and
> /var/run/logpriv.
ACK. This looks like a fun bug.
-Ngie
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