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[73.241.150.58]) by smtp.gmail.com with ESMTPSA id hg11sm13064978pjb.14.2020.01.26.11.12.12 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 26 Jan 2020 11:12:13 -0800 (PST) Subject: Re: INFO: rcu detected stall in addrconf_rs_timer (3) To: syzbot , davem@davemloft.net, edumazet@google.com, jhs@mojatatu.com, jiri@resnulli.us, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com, xiyou.wangcong@gmail.com References: <0000000000003021ea059d0c98b4@google.com> From: Eric Dumazet Message-ID: <7f746a56-07d9-282d-02b6-1724350b90b7@gmail.com> Date: Sun, 26 Jan 2020 11:12:11 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 In-Reply-To: <0000000000003021ea059d0c98b4@google.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 1/26/20 7:25 AM, syzbot wrote: > syzbot suspects this bug was fixed by commit: > > commit d9e15a2733067c9328fb56d98fe8e574fa19ec31 > Author: Eric Dumazet > Date: Mon Jan 6 14:10:39 2020 +0000 > > pkt_sched: fq: do not accept silly TCA_FQ_QUANTUM > > bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1625d479e00000 > start commit: a1ec57c0 net: stmmac: tc: Fix TAPRIO division operation > git tree: net-next > kernel config: https://syzkaller.appspot.com/x/.config?x=7159d94cd4de714e > dashboard link: https://syzkaller.appspot.com/bug?extid=c22c6b9dce8e773ddcb6 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=168e33b6e00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=178c160ae00000 > > If the result looks correct, please mark the bug fixed by replying with: > > #syz fix: pkt_sched: fq: do not accept silly TCA_FQ_QUANTUM > > For information about bisection process see: https://goo.gl/tpsmEJ#bisection > This sounds legit. #syz fix: pkt_sched: fq: do not accept silly TCA_FQ_QUANTUM