From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-356697-1518024210-2-11864510436698772982 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.001, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, UNPARSEABLE_RELAY 0.001, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='US', FromHeader='org', MailFrom='org' X-Spam-charsets: plain='UTF-8' X-Attached: signature.asc X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1518024210; b=sRuwWtNzPDWeDsqASd4DnZiZLM3q9QRFkXXrjsmoR5Gjw8f U+dBjMP7YUOAn6vTEDtCDcQCt9A+HrEx+Jk/Lf9CriFpafBPmALbJoqRKVsb5mhR 6pfMGW31GjqciKmd6Q93VuU+sC72ax1LhS2bwUXTnC2E1Rq6VltHbkKQD9/eExQi P1Ln/YibQjkOA8KWF2pUJZch6WAMhjDabK2L18ulKkPsLsqElEOvI7tA4lgRQRlw 0eKTfhqos+tMohRGCjn33OYkqTMa1xM/DA3dVgnE7HTLcPytObxBC68t5CJQTa18 E0Eqb+/EE5+tEd6sq3egu4g21w2eyuTmaUW+EGw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=message-id:subject:from:to:cc:date :in-reply-to:references:content-type:mime-version:sender :list-id; s=arctest; t=1518024210; bh=q6XWr0OmIWWB0iHGG77R/HYfUR HdwcDM9D/S2KVhhug=; b=UFVtTDXYwxAlmnVdTnsylqzpeD/4EChpc4RKmb1qT8 9UNwZeYm+/B1uqYCAPmlDwZy1qzQSxAipy7mTaK8qILtoPwQQxMTqaxSW+TULLRH n84+K0zLoJUXdTZ7YdWixU2wg8cvGjPgD1YdQkZ5gOxRCBdKdplnd8yPOAh0NNGn dVJ/bU4+PnNDvveMiGLmws4AArF8I8qGkVjVILCEJ9MGhoinHDj7381Nuj7dFkFp BzkG4DDnpD8iEOAU26t5xDx+ffNEqPVmpOoqvQq01MhwnGDgYxdJV28z+oOwEOp1 ix5ptTDDejsw12R3abQwpSvN4H5/Q96bmfLeH7bVNKgg== ARC-Authentication-Results: i=1; mx6.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=debian.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=debian.org header.result=pass header_is_org_domain=yes Authentication-Results: mx6.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=debian.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=debian.org header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754531AbeBGRXL (ORCPT ); Wed, 7 Feb 2018 12:23:11 -0500 Received: from pic75-3-78-194-244-226.fbxo.proxad.net ([78.194.244.226]:52218 "EHLO mail.corsac.net" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1754343AbeBGRXK (ORCPT ); Wed, 7 Feb 2018 12:23:10 -0500 Message-ID: <1518024182.2136.3.camel@debian.org> Subject: Re: Regression for ip6-in-ip4 IPsec tunnel in 4.14.16 From: Yves-Alexis Perez To: Mike Maloney Cc: "David S. Miller" , Alexey Kuznetsov , Hideaki YOSHIFUJI , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Eric Dumazet , Greg Kroah-Hartman , stable@vger.kernel.org, debian-kernel@lists.debian.org, Tobias Brunner Date: Wed, 07 Feb 2018 18:23:02 +0100 In-Reply-To: <1518023139.2100.7.camel@debian.org> References: <1518021487.2100.2.camel@debian.org> <1518023139.2100.7.camel@debian.org> Content-Type: multipart/signed; micalg="pgp-sha256"; protocol="application/pgp-signature"; boundary="=-RiUeG7/sVUdT5Bwl3BXM" X-Mailer: Evolution 3.26.3-1 Mime-Version: 1.0 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: --=-RiUeG7/sVUdT5Bwl3BXM Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Wed, 2018-02-07 at 18:05 +0100, Yves-Alexis Perez wrote: > I'll try to printk the mtu before returning EINVAL to see why it's lower = than > 1280, but maybe the IP encapsulation is not correctly handled? I did: diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c index 3763dc01e374..d3c651158d35 100644 --- a/net/ipv6/ip6_output.c +++ b/net/ipv6/ip6_output.c @@ -1215,7 +1215,7 @@ static int ip6_setup_cork(struct sock *sk, struct ine= t_cork_full *cork, mtu =3D np->frag_size; } if (mtu < IPV6_MIN_MTU) - return -EINVAL; + printk("mtu: %d\n", mtu); cork->base.fragsize =3D mtu; if (dst_allfrag(rt->dst.path)) cork->base.flags |=3D IPCORK_ALLFRAG; and I get: f=C3=A9vr. 07 18:19:50 scapa kernel: mtu: 1218 and it doesn't depend on the original packet size (same thing happens with ping -s 100). It also happens with UDP (DNS) traffic, but apparently not wi= th TCP. Regards, --=20 Yves-Alexis --=-RiUeG7/sVUdT5Bwl3BXM Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEE8vi34Qgfo83x35gF3rYcyPpXRFsFAlp7NfYACgkQ3rYcyPpX RFt+PwgAx+VG1WqNLIKE3pjxS15vsQqDdP0GA2BqG98fT/viHocDeg6+zCDqvLnW 12Nv/Nr+OVMRcFO87aVWvM5Z4u/CXIzObjpzUYdV2NGBOIq/S22lnlZhi50eqY0y vzl1us9bFdP6Jgba/JLT3UirJ2NbB39wxFO2aWaHO2v0zn0E1ETZF7jSNjkiI4xL kVZcsNtlugX19qDSiNWeXbRfZ2jU7JI1Pmi6wVQX7MtrjdHAsLBrPaSwqMw1DmkW 9kly6UpafeT8Lw3WrvoXaWJSW4wvdku6lUHxa5ztxALNCpdlFqa+NmpxcoEIixtj ttdGcJEUEBb2veDkaPunq4jIkGIW2w== =SBA+ -----END PGP SIGNATURE----- --=-RiUeG7/sVUdT5Bwl3BXM--