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=-8.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable 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 79224C43461 for ; Fri, 11 Sep 2020 12:02:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 39120221E7 for ; Fri, 11 Sep 2020 12:02:49 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=ziepe.ca header.i=@ziepe.ca header.b="n0vjFDUz" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725834AbgIKMCq (ORCPT ); Fri, 11 Sep 2020 08:02:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58376 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725710AbgIKMC0 (ORCPT ); Fri, 11 Sep 2020 08:02:26 -0400 Received: from mail-qk1-x743.google.com (mail-qk1-x743.google.com [IPv6:2607:f8b0:4864:20::743]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 92E87C061573 for ; Fri, 11 Sep 2020 05:02:25 -0700 (PDT) Received: by mail-qk1-x743.google.com with SMTP id v123so9554750qkd.9 for ; Fri, 11 Sep 2020 05:02:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ziepe.ca; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=D0ZOTZlli3YnxT/U7k9I9lkvcB/+y93d4fQplk7yHJk=; b=n0vjFDUzG4qczfNYYEQo0/PtVzhG6uwWdXe6pYAlq+bKliwiMGLEi6iZHnmN+MUf96 vigHIL3FLLDBmZ208RA29lbJ853ZlKTcsSZwEjZwRKXuOo3+6wjXFz3y0FmOLmVRhoeE Oh1X21fEv4NbB+KAJR1egsZQ+e47DXNgoawyg+ok8Z3QC60bO3VMpeY+iag7pMD+MWIY SW52UKuvEUkCM3OcftS7ajs50GcI6NhFtwyGZnocEKuyJ3vdMYuu1Pu9MqgVhoApnikw NHC4nNhv//lnRtQ3N/pEnV9a0UkT4bLFNi9SQis9HU+SWBg5yPBUOd3+JQmQPQXkdNuj 3rag== 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; bh=D0ZOTZlli3YnxT/U7k9I9lkvcB/+y93d4fQplk7yHJk=; b=pZK2APKygWoW2uBgWhiIWzFhaQKVoSeeJYggafwToYyM3XS0HIfwHYNasHMjuOlZDE ne4V9XddZ8ocknpVrqvhMaPPeGDCh5tL+w+bV/ROlNcAnlz5KY4ac/gym41BW1CzMtp4 7CvyHmsIwGi/56NwhiZ0+3uO0sLKAryAyGT3fAk2CR5xO5HZA0GKMnXotcgZtYuehFJr zDjCiw3s4Pk4KWWCL/aeHvRZECosDk1nqrBAt7llaKinp9OiBTMa6TE2qrixopDypINQ c+SuQv/+oWLWvFCrKWrpOu9S4T40JB2EzRq+NUIjuk/y3qx8J/qXIEXeoqwamnt7dIYB UhBQ== X-Gm-Message-State: AOAM532pFjY4rrqWB/1LG+dKcaFgGRneTy9lSBjoMwUTZ6sDAup+A03N u5MJqja/NNtCx2tDibQrioBC2g== X-Google-Smtp-Source: ABdhPJygUW9F4tubVaZ2xlkL1ks7ALZ2LGBS6K77k5kTwE5xiNcEmIj8mnjJVgK2kwSwFGx45VighA== X-Received: by 2002:a37:4711:: with SMTP id u17mr1100114qka.54.1599825744148; Fri, 11 Sep 2020 05:02:24 -0700 (PDT) Received: from ziepe.ca (hlfxns017vw-156-34-48-30.dhcp-dynamic.fibreop.ns.bellaliant.net. [156.34.48.30]) by smtp.gmail.com with ESMTPSA id 202sm2417189qkg.56.2020.09.11.05.02.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 11 Sep 2020 05:02:23 -0700 (PDT) Received: from jgg by mlx with local (Exim 4.94) (envelope-from ) id 1kGhl0-004mB3-60; Fri, 11 Sep 2020 09:02:22 -0300 Date: Fri, 11 Sep 2020 09:02:22 -0300 From: Jason Gunthorpe To: syzbot Cc: dledford@redhat.com, leon@kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: KASAN: use-after-free Read in ucma_close (2) Message-ID: <20200911120222.GT87483@ziepe.ca> References: <0000000000008e7c8f05aef61d8d@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0000000000008e7c8f05aef61d8d@google.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Sep 10, 2020 at 07:09:24AM -0700, syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 34d4ddd3 Merge tag 'linux-kselftest-5.9-rc5' of git://git... > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=1002ea2d900000 > kernel config: https://syzkaller.appspot.com/x/.config?x=a9075b36a6ae26c9 > dashboard link: https://syzkaller.appspot.com/bug?extid=cc6fc752b3819e082d0c > compiler: gcc (GCC) 10.1.0-syz 20200507 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1600e053900000 #syz test: git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git 308571debccd7004acf02ea1b7163a96ad772292 Jason