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[73.241.150.70]) by smtp.gmail.com with ESMTPSA id v40sm6937601pgn.17.2019.05.09.04.35.39 (version=TLS1_3 cipher=AEAD-AES128-GCM-SHA256 bits=128/128); Thu, 09 May 2019 04:35:39 -0700 (PDT) Subject: Re: [PATCH net V3 1/2] tuntap: fix dividing by zero in ebpf queue selection To: Jason Wang , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Cc: yuehaibing@huawei.com, xiyou.wangcong@gmail.com, weiyongjun1@huawei.com, eric.dumazet@gmail.com References: <1557372018-18544-1-git-send-email-jasowang@redhat.com> From: Eric Dumazet Message-ID: <1a244711-657c-88f9-6463-c503d178dd02@gmail.com> Date: Thu, 9 May 2019 04:35:38 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <1557372018-18544-1-git-send-email-jasowang@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 5/8/19 11:20 PM, Jason Wang wrote: > We need check if tun->numqueues is zero (e.g for the persist device) > before trying to use it for modular arithmetic. > > Reported-by: Eric Dumazet > Fixes: 96f84061620c6("tun: add eBPF based queue selection method") > Signed-off-by: Jason Wang > --- Reviewed-by: Eric Dumazet Thanks.