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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6C148C25B47 for ; Wed, 25 Oct 2023 07:23:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232622AbjJYHX1 (ORCPT ); Wed, 25 Oct 2023 03:23:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37472 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232346AbjJYHXZ (ORCPT ); Wed, 25 Oct 2023 03:23:25 -0400 Received: from mail-ej1-x629.google.com (mail-ej1-x629.google.com [IPv6:2a00:1450:4864:20::629]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E1FDE90 for ; Wed, 25 Oct 2023 00:23:22 -0700 (PDT) Received: by mail-ej1-x629.google.com with SMTP id a640c23a62f3a-9b6559cbd74so809116566b.1 for ; Wed, 25 Oct 2023 00:23:22 -0700 (PDT) DKIM-Signature: v=1; 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bh=SnNqjmTumDhS9QjbNc2fsxDzSTTZE7f6qzo4FhoEWiY=; b=EoYzjhMOIuKkiKjJ6MSDF99KSEIIPx5xUDcjgQhkxJXHcpD6Pf4EEm+Jw2HlRxOkS2 OR630j1l0nCWFKlZfLYqI0UExEMHLDBO1c4qJL7rHla9UF3wCs4o9Bu9L7FyPS5oZVhX sn/TGwGRNriJhxS1aCjFucKW8tz4VX6gLCqtS0a1LqbkI7E50tuHXk3BnRWPc/XhyRJj QC9RkqlAQUZfw1ik3g8hppgFcRCpct70x5B/m8eAo3uE8nfUdiIJvpP0czjl0l9lfrgV 2kh+w4aPN4hvPj5CNxzZBT7As3iDXUD6TJZ+xv2aycp0qzyDT9Wqqh/Pdlne+CMVyjJA 9/yQ== X-Gm-Message-State: AOJu0YwTv1kPw0UeoYJgarqeny/Zs7u5A0ziWmlqHZAh1Hjv1FmcYRbd pkTFe01Mpy1vxnWMuzDhNucRFA== X-Google-Smtp-Source: AGHT+IGDzPdEPaKGrNOsr1qlrTkceEf3aDuIWmsxOt658eqmx0JDzDRBplXTPhd2sIMHpXKUFjspNw== X-Received: by 2002:a17:906:7310:b0:9c6:724:fa1f with SMTP id di16-20020a170906731000b009c60724fa1fmr12387261ejc.66.1698218600947; Wed, 25 Oct 2023 00:23:20 -0700 (PDT) Received: from [192.168.1.20] ([178.197.218.126]) by smtp.gmail.com with ESMTPSA id jg36-20020a170907972400b0099d798a6bb5sm9403230ejc.67.2023.10.25.00.23.19 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 25 Oct 2023 00:23:20 -0700 (PDT) Message-ID: <32edfc3c-321e-4816-b634-7b9540ab8c47@linaro.org> Date: Wed, 25 Oct 2023 09:23:18 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: KASAN: slab-use-after-free Read in nfc_llcp_unregister_device Content-Language: en-US To: Abagail ren , davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, syzkaller@googlegroups.com References: From: Krzysztof Kozlowski Autocrypt: addr=krzysztof.kozlowski@linaro.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 25/10/2023 08:27, Abagail ren wrote: > Good day, dear maintainers. > > Since the email system replied that it refused to accept the email because > the text contained HTML, I sent it to you again in the form of shared files. > > We found a bug using a modified kernel configuration file used by syzbot. > > We enhanced the probability of vulnerability discovery using our prototype > system developed based on syzkaller and found a bug "' KASAN: > slab-use-after-free Read in nfc_llcp_unregister_device." I'm still working > on it to find out its root cause and availability. > > The stack information: > https://docs.google.com/document/d/1gdHebCRsvVsSPKfilcoXVu3Pctvoj2FSZCACcVYZXns/edit?usp=sharing > > Kernel Branch: 6.4.0-rc3 > Hi, I received two emails from you, so I am not sure if these are separate issues or not. Anyway, there were fixes to these paths and you are testing quite old kernel. If you have the reproducer, it should be straightforward to test new kernel, so please do so. Test on linux-next. > Kernel Config: > https://docs.google.com/document/d/1WIM0btqS2dex18HQYaL2xyoW6WdX2TsaNguTnWzHMps/edit?usp=sharing > > Reproducer: > https://docs.google.com/document/d/1LrgGdOgZwO8wz0opusZ7flP9QSFZa32GdozvoxGysyY/edit?usp=sharing Best regards, Krzysztof