From nobody Thu Oct 20 07:35:05 2022 X-Original-To: net@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4MtKBL26gdz4g5qv for ; Thu, 20 Oct 2022 07:35:06 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4MtKBL150wz45PN for ; Thu, 20 Oct 2022 07:35:06 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4MtKBL08gGzp4j for ; Thu, 20 Oct 2022 07:35:06 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 29K7Z5L2097665 for ; Thu, 20 Oct 2022 07:35:05 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 29K7Z5uR097664 for net@FreeBSD.org; Thu, 20 Oct 2022 07:35:05 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 265588] [TCP] - tcp send a retransmission identical sequence number packet with different payload Date: Thu, 20 Oct 2022 07:35:05 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 13.1-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: rscheff@freebsd.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: net@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@freebsd.org MIME-Version: 1.0 ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1666251306; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=QCVni9M8DWrI0HDgwZFY2Ghhqd2ysbJtUdDw3fvbzQ8=; b=TjQ8yklpsHFLYq+bmLSTgyfdaHrRhvfHrAKKYaEtxM3VgSkBgcyZywSGrGWlfnP9vlvGiL ED0cIwRsF4yVw9CZj+g/GNkXm5UZdjQRvsQJGI2O05yktS5pIHP5j8iAJSR3Uy9b/K0iln Sxizn6Tlmtaufd6Z09Eu0/BzXc/EzZCiqQJJNFiUiCykX6z8Zm5grYua0HmVgaTxto/D9N xiyGjND+OMp1KYP1wUvApM1DHknGA+DZN5jw26IEkI3qiGv18oQy5jrkshOYBloJ0M2Wtc I62Xl4YQWud/BoXY7nrBO6t4qTUzl/iBi9U5+7lrQn+Pvq+D7Torlk3bgLTTpw== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1666251306; a=rsa-sha256; cv=none; b=X9wmQTVSe4yurwiTGjfhhWBZoBsrmZqybX5mWcXESuIVYpBEpm29mR8WJZKrhCgLhj5mVZ wYMAzaUeLDy3vjmcTvi6GFlmPIaU5K+KzG8KyU8rzkLHlISOkuJw2F+km5WhEBE4AzriUU hOIm29kH49RpD4P99waon87LQroOJSK/eUcCPD4k4Jbz+X+VvcYyrtC2PFizREtf7GsgUM VqjURjtRFoOT8u3g6vG2AO+wikwcCOnqIFu8ttH0eToVcnKRGlO/iQiqznJEF/r4BpMO16 2JS1aRJLcy5RfQRfF8syntt34KlibSVED3fPt31MHG67L+x6V/UHWUq5b6iEDQ== ARC-Authentication-Results: i=1; mx1.freebsd.org; none X-ThisMailContainsUnwantedMimeParts: N https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D265588 --- Comment #2 from Richard Scheffenegger --- Can you please provide more context around the traces? Did you capture on the client side, or on the server side? It appears, that the capture was performed on the client side, with LRO ena= bled - simultaneously, the network in between appears to have created some significant reordering, causing the re-transmission and later DSACKs of pac= kets by the sender. If the server is under your control, please create a simultaneous capture on both sides - and to narrow down things further, try to disable TSO / LRO (ifconfig eth0 -lro -tso ) on both sides. First things to establish:=20 Is the sender transmitting these bytes incorrectly (with/without TSO)?=20 Is the network interferring somehow?=20 Is the clients LRO code mishandling the packets? --=20 You are receiving this mail because: You are the assignee for the bug.=