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([2620:15c:2c1:200:55c7:81e6:c7d8:94b]) by smtp.gmail.com with ESMTPSA id 71sm7584170pfx.107.2019.11.04.09.33.19 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 04 Nov 2019 09:33:19 -0800 (PST) Subject: Re: Double free of struct sk_buff reported by SLAB_CONSISTENCY_CHECKS with init_on_free To: Thibaut Sautereau , netdev@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: "David S. Miller" , Laura Abbott , Kees Cook , Alexander Potapenko , Andrew Morton , clipos@ssi.gouv.fr References: <20191104170303.GA50361@gandi.net> From: Eric Dumazet Message-ID: <719eebd3-259d-8beb-025a-f2d17c632711@gmail.com> Date: Mon, 4 Nov 2019 09:33:18 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <20191104170303.GA50361@gandi.net> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Bogosity: Ham, tests=bogofilter, spamicity=0.000003, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 11/4/19 9:03 AM, Thibaut Sautereau wrote: > > We first encountered this issue under huge network traffic (system image > download), and I was able to reproduce by simply sending a big packet > with `ping -s 65507 `, which crashes the kernel every single time. > Since you have a repro, could you start a bisection ? Thanks !