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=-2.3 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, URIBL_BLOCKED,USER_AGENT_SANE_1 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 051E6CA9EC0 for ; Mon, 28 Oct 2019 15:36:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CE51420578 for ; Mon, 28 Oct 2019 15:36:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="KsoHc9+W" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731985AbfJ1Pgx (ORCPT ); Mon, 28 Oct 2019 11:36:53 -0400 Received: from mail-qt1-f194.google.com ([209.85.160.194]:39815 "EHLO mail-qt1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726025AbfJ1Pgx (ORCPT ); Mon, 28 Oct 2019 11:36:53 -0400 Received: by mail-qt1-f194.google.com with SMTP id t8so15174376qtc.6; Mon, 28 Oct 2019 08:36:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=X/AyUl2apR1iCfwj2kG9abOusf6OXMfXucKK4+wE+uQ=; b=KsoHc9+W6GrxaU4WH0NzZ7G6kzBg0b0z8dTYFiJ4Wg3ccWBwvIqmsbRc48h8ZesB7j GpiB1D67APHsIL5nBr4bq1cywQUmlPqkfGUh5p5ilesffsd+dYKo2qdrSyjRtLqiKZX2 tm8TISpGQdaGd7p7iKWBYNq+ksjvRS0kmrOFmQ40RMBTjyAsUJwr178a3JgtJ/KY+Don piZK/q99/KgWT3WCe6O4zcoastXxdlTkeaxN5HPIRzCRv6a0jgtfYW23ibGIGozBNkU8 nH53xNYApd8jZeUifEm2vNdG4HJ/EgT6aI2IMte5HbK1Yj2pRxY6XziFLN9YxiZXDnQs +15w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=X/AyUl2apR1iCfwj2kG9abOusf6OXMfXucKK4+wE+uQ=; b=sh0gCUpto9CUSDSh8ccehb7QvX3Z+ZPCezkrsHRoCY9KARz/ucV2Vr1uCHkUqKXZm6 GNhydT1hYIe2ua5QDIy1zTc/84UwwjVWgWKvjjDY1UIvzf3GtRTrRUBsDd/QR2UuP8lQ Gh5dsnxjmHvWWibZ2Ts2INwIFpj9FjpAVqxtcCD8WLe+DCUvCL48qKtEPw56zUpFxxb3 IeJxFWGdGIHRAMVLT0ayQiI7c65+5ixyp8tpSnjG1yXkl8n9jtM6QNUjhfZfK04Fkz+9 CZC5KR7CI9C2ICG7qIV84ZltUCQZ7o4I+oyVKcjkUQOcxoF1Ntz+Dyb/seR/+R6O6JAX f/zA== X-Gm-Message-State: APjAAAXfVHEsviHQMaTpaRBQmkN2vApyBoPZqr9aE6Pwi2J9fPltnHUV fxiaAoAUgryZ7Mt2Hrqd+oQ= X-Google-Smtp-Source: APXvYqymZABOv21SsYV9D8JTRdSkOnK9lkbnddolPIkUK1UpDSlv+qwInskpJwT/9VwSwKc/EEJcUA== X-Received: by 2002:a0c:f851:: with SMTP id g17mr16291522qvo.157.1572277011591; Mon, 28 Oct 2019 08:36:51 -0700 (PDT) Received: from localhost.localdomain ([2001:1284:f013:326e:3cb7:46e:7f5e:cff5]) by smtp.gmail.com with ESMTPSA id y186sm6327995qkd.71.2019.10.28.08.36.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Oct 2019 08:36:50 -0700 (PDT) Received: by localhost.localdomain (Postfix, from userid 1000) id 6FE69C0AD9; Mon, 28 Oct 2019 12:36:48 -0300 (-03) Date: Mon, 28 Oct 2019 12:36:48 -0300 From: Marcelo Ricardo Leitner To: syzbot Cc: davem@davemloft.net, leon@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, linux-sctp@vger.kernel.org, netdev@vger.kernel.org, nhorman@tuxdriver.com, roid@mellanox.com, saeedm@mellanox.com, syzkaller-bugs@googlegroups.com, vladbu@mellanox.com, vyasevich@gmail.com Subject: Re: KASAN: use-after-free Read in sctp_sock_dump Message-ID: <20191028153648.GF4250@localhost.localdomain> References: <000000000000e68ee20595fa33be@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <000000000000e68ee20595fa33be@google.com> User-Agent: Mutt/1.12.1 (2019-06-15) Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On Mon, Oct 28, 2019 at 08:32:08AM -0700, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: d6d5df1d Linux 5.4-rc5 > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=17ef5a70e00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=2bcb64e504d04eff > dashboard link: https://syzkaller.appspot.com/bug?extid=e5b57b8780297657b25b > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > userspace arch: i386 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16cd8800e00000 > > The bug was bisected to: > > commit 61086f391044fd587af9d70a9b8f6f800dd474ba > Author: Vlad Buslov > Date: Fri Aug 2 19:21:56 2019 +0000 > > net/mlx5e: Protect encap hash table with mutex > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=135960af600000 This is weird. This mlx5e commit has nothing to do with SCTP diag dump. Marcelo