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=-0.6 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 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 E2C70C4CECD for ; Mon, 16 Sep 2019 16:49:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B91E521881 for ; Mon, 16 Sep 2019 16:49:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="AccxtUY3" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390197AbfIPQtk (ORCPT ); Mon, 16 Sep 2019 12:49:40 -0400 Received: from mail-pg1-f195.google.com ([209.85.215.195]:35375 "EHLO mail-pg1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727950AbfIPQtj (ORCPT ); Mon, 16 Sep 2019 12:49:39 -0400 Received: by mail-pg1-f195.google.com with SMTP id a24so335282pgj.2; Mon, 16 Sep 2019 09:49:39 -0700 (PDT) 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=W7qUWOCQv295QFg+kgQAJCdA5yUvErYXEpf5sx/e6XU=; b=AccxtUY3qK7DBSc5mPgdjoEFUUwFSbVOWkIiZa3Pmed9s8B+Jq2cAj8vs9ZxCbEuPQ +ObMojKzV113QlCwX3fdNfFZqpBxVg3+/dinNe8bpDnb4aXMqwXrtztLO1ArIkGalCXf 7ZcchRzkgPvLfXiuim6yLSV8DDntHLpxeIbLMuSC69hOVTr6Utoj3JV4YJwQ44DXPyh3 gwyBl5Uw4dR4PpvzgmQQNZAIIuDB1ybE8zDTbWVAdcx7JX4xuZ9YeSjPOTC+G+OEd4Kf kmbRjkshIqP2VkU/jGT8VwpRm9zzTJsqSZUpmvAIOvFPcORJL53qE/Q3PD+O8Nr8loc2 KwsA== 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=W7qUWOCQv295QFg+kgQAJCdA5yUvErYXEpf5sx/e6XU=; b=RFA+gak+hD2Ku2FpwOR4BnvMxL/jn9Pr9Y55RqoEe1KXM1H0A56bXfa18+GBhBCBW8 uNQHFlrkaM9S/G4e1ItivKMzr2rBo+qb08T5if2VEddI9esLGrzGRlgHh15Zgw9Bj1Uz JGrqQsE9nxk+jAL2IW3kgH1mny55PK91B4sK58EmN584lhqaWEBubt9Y2VXMIqnYREep Zmrl8iipddr4NQvH/P4lUC9m67rqKwkGYJuOJfqImMBabuuJQM+GgQb2ee5cNayyFyiD +6Ty0IVBOryuyYVW6r1YwU54dvxSpE3E+r+NvR5zO+fvulz5eBNBElxiIgl+pmGSykDb SAGA== X-Gm-Message-State: APjAAAUk0gvqqkPTCptYuRgEcahyEuOx8G2So2dUzeOVBgWX2u6R5LkN RZmHTUmz7v9Qk8mcwKXoVU6MK6aSetUjkwok9CRiI7On X-Google-Smtp-Source: APXvYqyAXD0tyD7MrbcDTMVUL4D6V3O9kJa2CxpFLHUtljsyh604tYz4byuwunOlqXswIi8ORiop7tPu7FZNfCHgfDM= X-Received: by 2002:aa7:828c:: with SMTP id s12mr272706pfm.94.1568652578437; Mon, 16 Sep 2019 09:49:38 -0700 (PDT) MIME-Version: 1.0 References: <000000000000bd36db0592ab9652@google.com> In-Reply-To: <000000000000bd36db0592ab9652@google.com> From: Cong Wang Date: Mon, 16 Sep 2019 09:49:27 -0700 Message-ID: Subject: Re: BUG: unable to handle kernel NULL pointer dereference in rds_bind To: syzbot Cc: Arvid Brodin , David Miller , LKML , linux-rdma@vger.kernel.org, Linux Kernel Network Developers , rds-devel@oss.oracle.com, Santosh Shilimkar , syzkaller-bugs Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Sep 16, 2019 at 6:29 AM syzbot wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit: f4b752a6 mlx4: fix spelling mistake "veify" -> "verify" > git tree: net > console output: https://syzkaller.appspot.com/x/log.txt?x=16cbebe6600000 > kernel config: https://syzkaller.appspot.com/x/.config?x=b89bb446a3faaba4 > dashboard link: https://syzkaller.appspot.com/bug?extid=fae39afd2101a17ec624 > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10753bc1600000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=111dfc11600000 > > The bug was bisected to: > > commit b9a1e627405d68d475a3c1f35e685ccfb5bbe668 > Author: Cong Wang > Date: Thu Jul 4 00:21:13 2019 +0000 > > hsr: implement dellink to clean up resources The crash has nothing to do with this commit. It is probably caused by the lack of ->laddr_check in rds_loop_transport.