Date: Tue, 31 Oct 2017 14:34:52 +0300 From: "Andrey V. Elsukov" <bu7cher@yandex.ru> To: Viktor Dukhovni <freebsd@dukhovni.org>, freebsd-net@freebsd.org Subject: Re: FreeBSD 11.1-RELEASE: Kernel panic in ipv6_output() via tcp6_usr_connect() Message-ID: <86dcc06d-b98c-cc1f-8726-8afb011871e3@yandex.ru> In-Reply-To: <FCC0833F-AA88-4F27-9DA3-4FA1218C49DB@dukhovni.org> References: <FCC0833F-AA88-4F27-9DA3-4FA1218C49DB@dukhovni.org>
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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --dQMN28HhVb6hB6H9jq05S5LFF3m4Vsjk8 Content-Type: multipart/mixed; boundary="FM2kQ5bHGKun2WU6WOuJUwbcFBUCi3B4T"; protected-headers="v1" From: "Andrey V. Elsukov" <bu7cher@yandex.ru> To: Viktor Dukhovni <freebsd@dukhovni.org>, freebsd-net@freebsd.org Message-ID: <86dcc06d-b98c-cc1f-8726-8afb011871e3@yandex.ru> Subject: Re: FreeBSD 11.1-RELEASE: Kernel panic in ipv6_output() via tcp6_usr_connect() References: <FCC0833F-AA88-4F27-9DA3-4FA1218C49DB@dukhovni.org> In-Reply-To: <FCC0833F-AA88-4F27-9DA3-4FA1218C49DB@dukhovni.org> --FM2kQ5bHGKun2WU6WOuJUwbcFBUCi3B4T Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 31.10.2017 02:57, Viktor Dukhovni wrote: > I am using FreeBSD 11.1 as the O/S for my DANE/SMTP adoption scanner. > The system has an IPv4 static IPv4 and also a corresponding 6to4 > address on stf0. >=20 > The system is stable when I run IPv4-only scans, but crashes quickly > as soon as I start a bulk scan that also connects to the IPv6 addresses= > of remote SMTP servers. Indeed after getting the destination address > of the connection that caused the panic (see below) I can now reproduce= > the problem at will with just: >=20 > $ nc 2a01:5b40:0:2201::1 25 >=20 > since hardware checksums don't seem to play along with ipfw and NAT. > The scans run on the machine itself, not an internal node. >=20 > #9 0xffffffff80c82b84 in ip6_output (m0=3D0xfffff80049f8e000, opt=3D<v= alue optimized out>, ro=3D0xfffff80329e90530, flags=3D<value optimized ou= t>,=20 > im6o=3D<value optimized out>, ifpp=3D0x0, inp=3D<value optimized ou= t>) at /usr/src/sys/netinet6 Hi, can you show your nat rules? Also what will show following commands in kgdb: f 9 i lo p *ifp p *ro p *m --=20 WBR, Andrey V. Elsukov --FM2kQ5bHGKun2WU6WOuJUwbcFBUCi3B4T-- --dQMN28HhVb6hB6H9jq05S5LFF3m4Vsjk8 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEzBAEBCAAdFiEE5lkeG0HaFRbwybwAAcXqBBDIoXoFAln4X90ACgkQAcXqBBDI oXqE5QgAgkhHicUmaP7HZI8eviOLd/iKpztgykcXQ8VJSw/QDRAhxDP4eEdSM2uo wr0qUGkJg2YWwi5cWeqBwes1N9Hqa7+TEJ20Jw3eq8zVfu0OwA/WmNK0q19AFjrt Sl2TeuAX785EZ6hYk8/9GziPJ80RyAVhrnUeZdOsnpToD+6PXwdeE4+ejIW7Bis3 HLPL0FUte1biCUDtxDvkghh7qSv6N1+vfRxsAdj78o57RvObMEbvqKU0n2nUvyzg YADEHDIPEmlkUjPFmicUIrFThuIIdCFRssiCZgXyU99TqQKc9WvPTLU5ZdjbYgmz IsJodAxQoPmpbRNkk3S/zccA777PeA== =1wmH -----END PGP SIGNATURE----- --dQMN28HhVb6hB6H9jq05S5LFF3m4Vsjk8--
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