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 019C5C433ED for ; Tue, 13 Apr 2021 13:45:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AA49661042 for ; Tue, 13 Apr 2021 13:45:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346075AbhDMNpW (ORCPT ); Tue, 13 Apr 2021 09:45:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49530 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346071AbhDMNpV (ORCPT ); Tue, 13 Apr 2021 09:45:21 -0400 Received: from mail-qv1-xf2b.google.com (mail-qv1-xf2b.google.com [IPv6:2607:f8b0:4864:20::f2b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BE402C061574 for ; Tue, 13 Apr 2021 06:45:00 -0700 (PDT) Received: by mail-qv1-xf2b.google.com with SMTP id x27so8053605qvd.2 for ; Tue, 13 Apr 2021 06:45:00 -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:content-transfer-encoding:in-reply-to; bh=1Jhigyf9UU6G6IXvufmrKhvm5rl8XcUyp6UG+kGmgLA=; b=P8TZ3q/K2FYMwgX8ih6dAOpznLZqzG37b1Il+KiMHbiWEjdcrBMIXlzDa57UplaUu8 1cAAmqJDwP+fMGvD6pfollJBQ39I4eEqGf7lGvVy2tw198zw6adWvWR1L3rvb6WgYOFV uQGjCtawvPEMW58igm5A0CBka0uwolxOU4LEpFWKSs1lhPa77NKyBLPUg4WWHQTJy3LB 156DznYIBE8+OodCuxpBC0EFExw/tzwn0R97kcNdKbOkaiQkydvJ+gJ0LLFY0JZWEeRv camQQdnfN4b3Ipkdf/GOljO8I/WtnNMwVi71Eh0N1IqdmIxk8/zkFM1RV0Whu15RMwut uVGQ== 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:content-transfer-encoding :in-reply-to; bh=1Jhigyf9UU6G6IXvufmrKhvm5rl8XcUyp6UG+kGmgLA=; b=NKBbSjTbrlhjnR44cFGc5IO2/S1LQSHAVNK3xAWFlJvD420v+W1fwYKOSUo7Vi2/2L 1hTq3XHMGI87WPlwan+lkS76u/0DWaTrz2m6o2eV6lUc90RfBg4wpEpp+uDHQ+tMewAd vtnXgrs7DS4pgaElzbcejFoG1i+MaWZICluALzbYeZFz14ecOaHpFDnSUW56bzRitZ3Q h9cnnKWx13FjB6pkWXEk5E+vSCU+HtE0OLZCZ1/XCjrYRte7BrY52DKOKl17ex6/s0pn iR771I9/2wBLBxcdOo392axdYkHj0rPI3phY4CB81nzW+2ZoS4zO0ouC7UEh+r+OcriC NP5Q== X-Gm-Message-State: AOAM530ozmlDFwf/DFPB153w2KBlsujEyKl3XvPvdYqk33oaAGxJe32B Gv2UtZnAma+2LKWAFDS6kIAF+Q== X-Google-Smtp-Source: ABdhPJxTLJu6I3qqH/XCtkZYAon1RFtHUEySj+DXtp3rSpBUrRvTcwgxXLIb7BBpqqA3GaZlyYTKOA== X-Received: by 2002:ad4:458b:: with SMTP id x11mr163890qvu.36.1618321500031; Tue, 13 Apr 2021 06:45:00 -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 i21sm1369148qtr.94.2021.04.13.06.44.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Apr 2021 06:44:59 -0700 (PDT) Received: from jgg by mlx with local (Exim 4.94) (envelope-from ) id 1lWJLe-005HU5-T4; Tue, 13 Apr 2021 10:44:58 -0300 Date: Tue, 13 Apr 2021 10:44:58 -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: <20210413134458.GI227011@ziepe.ca> References: <20210413133359.GG227011@ziepe.ca> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org On Tue, Apr 13, 2021 at 09:42:43PM +0800, Hao Sun wrote: > Jason Gunthorpe 于2021年4月13日周二 下午9:34写道： > > > > 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 > > > > Seems strange to me too, but the fact is that the reproduction program > in attachment can trigger these two bugs quickly. Do you have this in the C format? Jason