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[73.241.150.58]) by smtp.gmail.com with ESMTPSA id f2sm13144874pfg.48.2019.11.10.15.48.00 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 10 Nov 2019 15:48:01 -0800 (PST) Subject: Re: Possible bug in TCP retry logic/Kernel crash To: Avinash Patil , netdev@vger.kernel.org References: From: Eric Dumazet Message-ID: <0d553faa-b665-14cf-e977-d2b0ff3d763e@gmail.com> Date: Sun, 10 Nov 2019 15:47:59 -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: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org On 11/9/19 9:59 PM, Avinash Patil wrote: > Hi everyone, > > Kernel: Linux 4.19.35 kernel built from linux-stable > This is quite an old version. Please upgrade to the latest one. $ git log --oneline v4.19.35..v4.19.82 -- net/ipv4/tcp*c 3fdcf6a88ded2bb5c3c0f0aabaff253dd3564013 tcp: better handle TCP_USER_TIMEOUT in SYN_SENT state 67fe3b94a833779caf4504ececa7097fba9b2627 tcp: fix tcp_ecn_withdraw_cwr() to clear TCP_ECN_QUEUE_CWR 5977bc19ce7f1ed25bf20d09d8e93e56873a9abb tcp: remove empty skb from write queue in error cases 6f3126379879bb2b9148174f0a4b6b65e04dede9 tcp: inherit timestamp on mtu probe 1b200acde418f4d6d87279d3f6f976ebf188f272 tcp: Reset bytes_acked and bytes_received when disconnecting c60f57dfe995172c2f01e59266e3ffa3419c6cd9 tcp: fix tcp_set_congestion_control() use from bpf hook 6323c238bb4374d1477348cfbd5854f2bebe9a21 tcp: be more careful in tcp_fragment() dad3a9314ac95dedc007bc7dacacb396ea10e376 tcp: refine memory limit test in tcp_fragment() 59222807fcc99951dc769cd50e132e319d73d699 tcp: enforce tcp_min_snd_mss in tcp_mtu_probing() 7f9f8a37e563c67b24ccd57da1d541a95538e8d9 tcp: add tcp_min_snd_mss sysctl ec83921899a571ad70d582934ee9e3e07f478848 tcp: tcp_fragment() should apply sane memory limits c09be31461ed140976c60a87364415454a2c3d42 tcp: limit payload size of sacked skbs 6728c6174a47b8a04ceec89aca9e1195dee7ff6b tcp: tcp_grow_window() needs to respect tcp_space()