From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 64DA2C43331 for ; Mon, 11 Nov 2019 02:20:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 29FCE2067B for ; Mon, 11 Nov 2019 02:20:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="fcOvJiZV" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726879AbfKKCU1 (ORCPT ); Sun, 10 Nov 2019 21:20:27 -0500 Received: from mail-oi1-f194.google.com ([209.85.167.194]:34009 "EHLO mail-oi1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726785AbfKKCU0 (ORCPT ); Sun, 10 Nov 2019 21:20:26 -0500 Received: by mail-oi1-f194.google.com with SMTP id l202so10203298oig.1 for ; Sun, 10 Nov 2019 18:20:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=nfsWG4xyw5/l54C2LzZopGrNtf3htxTRkD1pP2aAsKA=; b=fcOvJiZVmr6Gf1GxTNxcef7FRuGuCwKNquDJ3WK+l6UFCViOrB9fXRhwbWzqIPYokw yg60aVfIQb9pVEssUTFIG5IjOsW0ig6zH/mo4QCvv4lh7ZM3NRR5LELhc6IS9leVNqj7 6Q5+lImOrvLyZcr1xGppqCUrzT2Dvai1xSGwn75fGbKhI90oc1N6DGCggtratc77rgAZ vZ1Ts743VUH80N2HW/OaOhGT9eSq9ZNIv7oCfrqyGCPDqIIGeeoqeX5Kc9EjIOK/p1JA vF4Y1PBqSlQ4XKjgQShOv8WK0vaWlsuJwcGdgdE15Vr70Zh3i50CeiPkUOAjXWlb1PIL b6wg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=nfsWG4xyw5/l54C2LzZopGrNtf3htxTRkD1pP2aAsKA=; b=AUErddrkX88Nz/YsZ+AhFAw+U1XIH07jKyPnOYi6+UhpCg3C5Rme4QAF+Bq8YOHyb6 1RtdHLaipqIPLwtbbZYtv9dJMhcEjzFzOK+dG+AdlXWIP5zXrqk1Qr0cwZDdfhy9DZoA 64Q/ouhi1XwbrtQ6qChaV3b/VLySzo4KW5TbBUAGPnFPqGghsfb6EkgxsIFnxzqKji0l LBycAPo4+l9xg/1DhXEwnjyZhHfPnWJ8Lp1CqRqG1AB+VXYOn35YAWgJX1+MQXez6e9c 2HhvgDQr+MmX5nfdPgM/51DQFNcrOxffKET+ffox8PpepY4shbI22I19LpnO3RAsHoXR +1Pg== X-Gm-Message-State: APjAAAWLtFW0VEhW7HqGB1aBECoX3NBDAYN6TFNC6ZFmHQH6jOTVnZ74 Thkv6cdW5gEEF2qiKtMGKBKfXDqRm1DpS7r/IEg= X-Google-Smtp-Source: APXvYqylMQADp6HiT85Nzz6DikUBXpEyNqwndnBgFA/4bfYij2aYk/O9MR19MBEG27Mph2iE9gSg/4VnyCgQ1S+WUqg= X-Received: by 2002:aca:1a03:: with SMTP id a3mr22314178oia.58.1573438825448; Sun, 10 Nov 2019 18:20:25 -0800 (PST) MIME-Version: 1.0 References: <0d553faa-b665-14cf-e977-d2b0ff3d763e@gmail.com> In-Reply-To: <0d553faa-b665-14cf-e977-d2b0ff3d763e@gmail.com> From: Avinash Patil Date: Sun, 10 Nov 2019 18:20:15 -0800 Message-ID: Subject: Re: Possible bug in TCP retry logic/Kernel crash To: Eric Dumazet Cc: netdev@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Thanks for the response, Eric. I have tested 4.19.80 as well and I see same issue there. I can run more tests(for additional data/logs) if needed- let me know. Best, Avinash On Sun, Nov 10, 2019 at 3:48 PM Eric Dumazet wrote: > > > > On 11/9/19 9:59 PM, Avinash Patil wrote: > > Hi everyone, > > > > Kernel: Linux 4.19.35 kernel built from linux-stable > > > > This is quite an old version. > > Please upgrade to the latest one. > > $ git log --oneline v4.19.35..v4.19.82 -- net/ipv4/tcp*c > 3fdcf6a88ded2bb5c3c0f0aabaff253dd3564013 tcp: better handle TCP_USER_TIMEOUT in SYN_SENT state > 67fe3b94a833779caf4504ececa7097fba9b2627 tcp: fix tcp_ecn_withdraw_cwr() to clear TCP_ECN_QUEUE_CWR > 5977bc19ce7f1ed25bf20d09d8e93e56873a9abb tcp: remove empty skb from write queue in error cases > 6f3126379879bb2b9148174f0a4b6b65e04dede9 tcp: inherit timestamp on mtu probe > 1b200acde418f4d6d87279d3f6f976ebf188f272 tcp: Reset bytes_acked and bytes_received when disconnecting > c60f57dfe995172c2f01e59266e3ffa3419c6cd9 tcp: fix tcp_set_congestion_control() use from bpf hook > 6323c238bb4374d1477348cfbd5854f2bebe9a21 tcp: be more careful in tcp_fragment() > dad3a9314ac95dedc007bc7dacacb396ea10e376 tcp: refine memory limit test in tcp_fragment() > 59222807fcc99951dc769cd50e132e319d73d699 tcp: enforce tcp_min_snd_mss in tcp_mtu_probing() > 7f9f8a37e563c67b24ccd57da1d541a95538e8d9 tcp: add tcp_min_snd_mss sysctl > ec83921899a571ad70d582934ee9e3e07f478848 tcp: tcp_fragment() should apply sane memory limits > c09be31461ed140976c60a87364415454a2c3d42 tcp: limit payload size of sacked skbs > 6728c6174a47b8a04ceec89aca9e1195dee7ff6b tcp: tcp_grow_window() needs to respect tcp_space() >