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=-10.7 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=ham 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 7ED91C433B4 for ; Tue, 13 Apr 2021 13:34:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 62B70610FC for ; Tue, 13 Apr 2021 13:34:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238477AbhDMNeX (ORCPT ); Tue, 13 Apr 2021 09:34:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47036 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236844AbhDMNeW (ORCPT ); Tue, 13 Apr 2021 09:34:22 -0400 Received: from mail-qk1-x732.google.com (mail-qk1-x732.google.com [IPv6:2607:f8b0:4864:20::732]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B2AB1C061574 for ; Tue, 13 Apr 2021 06:34:01 -0700 (PDT) Received: by mail-qk1-x732.google.com with SMTP id c123so12951330qke.1 for ; Tue, 13 Apr 2021 06:34:01 -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=ol3ASvhAwQOu79uFL+Cy6tkommWA1lm3vNzN2JnAzJc=; b=e9CUIIhOApot2KLCBo+HYoUWX+WACmZyv1z97wr869RkKYYDHdc6awKRq8dZfADSyz Q2YyoYQQI86xw+8Mn8OMbRTOQl8k2W2tdFmUeDMBL3/sn656PIBIjwJ5t+Tkpx9prxsq k7UvWnHfgjb68Ig7RlM7HuQlnz5FyPgFXAvWZJO7oPC4v1PJf7wnmkrXCoSM2fV+rGEe 0PA6l0WALi4DyTvIcz7Zia6FHmhTcsAdB/qN+/sdLsjIR/tvstC0B1dVTsRm1IlxLsYI ZgQXzMlXUoO84jw3SKTlUBM3pe76/LHavWSc+LKJhwVfbX6EZzdlJjoZM2bcm7cza1bl 2K2g== 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=ol3ASvhAwQOu79uFL+Cy6tkommWA1lm3vNzN2JnAzJc=; b=n1i4VcE7iNeqXHSGc8TsjNPIl1ow/puQLpEvjazs4fu6NXViQ94wTA7/AvXEp3RRnp 1q6uJojShJaASutqnbpacqRQX7PpSyjvczA9jyvSi9ERD6EMsd0065iTPp/R+PN5gRjW ioVGfVmKIsDQGsqRD5rniedLSIsVeufSAAW8WenPJB6CYrfQdKrbnE65aLdmCqjJqSbq 7nj7ci7n633eEhaIXxvI0ib0OG8zTB2HqkV26xgFgmJdGZMIXj5ygPC9QcEN61VeUKJO y9NmjVrIWYjKsVT1qFhWZ6V4nONz6BWXTZO1bsQLKJhM+DJTqmp2iclqf+A+0YbROOhd YJDg== X-Gm-Message-State: AOAM531HoyfLZjpPqxq76YRtO3MBNAgG8ML5EPa48c6BPHkOG7nxIQvf b9nkgMmrRxUuv6E0URhQnegMk6wPhnrt1KP1 X-Google-Smtp-Source: ABdhPJwsdUB/vtuwLwYWU+BiznBk1o/0xd62inXkEnmDLWfy9FwdkckHUotkubjHJYa3Aa5p1KI9ww== X-Received: by 2002:a05:620a:1107:: with SMTP id o7mr32711676qkk.188.1618320840976; Tue, 13 Apr 2021 06:34:00 -0700 (PDT) Received: from ziepe.ca (hlfxns017vw-142-162-115-133.dhcp-dynamic.fibreop.ns.bellaliant.net. [142.162.115.133]) by smtp.gmail.com with ESMTPSA id y15sm860640qkp.17.2021.04.13.06.33.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Apr 2021 06:34:00 -0700 (PDT) Received: from jgg by mlx with local (Exim 4.94) (envelope-from ) id 1lWJB1-005HHV-Eg; Tue, 13 Apr 2021 10:33:59 -0300 Date: Tue, 13 Apr 2021 10:33:59 -0300 From: Jason Gunthorpe To: Hao Sun Cc: dledford@redhat.com, linux-rdma@vger.kernel.org, leon@kernel.org, linux-kernel@vger.kernel.org Subject: Re: KASAN: use-after-free Read in cma_cancel_operation, rdma_listen Message-ID: <20210413133359.GG227011@ziepe.ca> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org On Tue, Apr 13, 2021 at 11:36:41AM +0800, Hao Sun wrote: > Hi > > When using Healer(https://github.com/SunHao-0/healer/tree/dev) to fuzz > the Linux kernel, I found two use-after-free bugs which have been > reported a long time ago by Syzbot. > Although the corresponding patches have been merged into upstream, > these two bugs can still be triggered easily. > The original information about Syzbot report can be found here: > https://syzkaller.appspot.com/bug?id=8dc0bcd9dd6ec915ba10b3354740eb420884acaa > https://syzkaller.appspot.com/bug?id=95f89b8fb9fdc42e28ad586e657fea074e4e719b Then why hasn't syzbot seen this in a year's time? Seems strange > Current report Information: > commit: 89698becf06d341a700913c3d89ce2a914af69a2 What commit is this? Jason