From owner-freebsd-net@freebsd.org Thu Jan 28 16:30:38 2021 Return-Path: Delivered-To: freebsd-net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 828334E1355 for ; Thu, 28 Jan 2021 16:30:38 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.nyi.freebsd.org (mailman.nyi.freebsd.org [IPv6:2610:1c1:1:606c::50:13]) by mx1.freebsd.org (Postfix) with ESMTP id 4DRQv230PHz3pGD for ; Thu, 28 Jan 2021 16:30:38 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 64F384E13AA; Thu, 28 Jan 2021 16:30:38 +0000 (UTC) Delivered-To: net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 64BB94E11E4 for ; Thu, 28 Jan 2021 16:30:38 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4DRQv22MB7z3p33 for ; Thu, 28 Jan 2021 16:30:38 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 4460912F6F for ; Thu, 28 Jan 2021 16:30:38 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 10SGUc9u075990 for ; Thu, 28 Jan 2021 16:30:38 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 10SGUcOD075989 for net@FreeBSD.org; Thu, 28 Jan 2021 16:30:38 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 252913] [tcp] Using RACK leaks mbufs Date: Thu, 28 Jan 2021 16:30:38 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 12.2-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: iron.udjin@gmail.com X-Bugzilla-Status: In Progress X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: tuexen@freebsd.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 28 Jan 2021 16:30:38 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D252913 --- Comment #17 from iron.udjin@gmail.com --- Today I discovered another issue. Some of TCP sessions looping in TCP Retransmission state. Here is what I captured by tcpdump and dumped by tsha= rk: 31880 32.587768 XXX.XXX.XXX.XXX =E2=86=92 YYY.YYY.YYY.YYY TCP 1514 [TCP Retransmission] 443 =E2=86=92 56467 [ACK] Seq=3D1 Ack=3D1 Win=3D17 Len=3D14= 60 31881 32.588789 XXX.XXX.XXX.XXX =E2=86=92 YYY.YYY.YYY.YYY TCP 1514 [TCP Retransmission] 443 =E2=86=92 56467 [ACK] Seq=3D1 Ack=3D1 Win=3D17 Len=3D14= 60 31882 32.589809 XXX.XXX.XXX.XXX =E2=86=92 YYY.YYY.YYY.YYY TCP 1514 [TCP Retransmission] 443 =E2=86=92 56467 [ACK] Seq=3D1 Ack=3D1 Win=3D17 Len=3D14= 60 31883 32.590829 XXX.XXX.XXX.XXX =E2=86=92 YYY.YYY.YYY.YYY TCP 1514 [TCP Retransmission] 443 =E2=86=92 56467 [ACK] Seq=3D1 Ack=3D1 Win=3D17 Len=3D14= 60 31884 32.591849 XXX.XXX.XXX.XXX =E2=86=92 YYY.YYY.YYY.YYY TCP 1514 [TCP Retransmission] 443 =E2=86=92 56467 [ACK] Seq=3D1 Ack=3D1 Win=3D17 Len=3D14= 60 31885 32.592870 XXX.XXX.XXX.XXX =E2=86=92 YYY.YYY.YYY.YYY TCP 1514 [TCP Retransmission] 443 =E2=86=92 56467 [ACK] Seq=3D1 Ack=3D1 Win=3D17 Len=3D14= 60 31886 32.593891 XXX.XXX.XXX.XXX =E2=86=92 YYY.YYY.YYY.YYY TCP 1514 [TCP Retransmission] 443 =E2=86=92 56467 [ACK] Seq=3D1 Ack=3D1 Win=3D17 Len=3D14= 60 31887 32.594911 XXX.XXX.XXX.XXX =E2=86=92 YYY.YYY.YYY.YYY TCP 1514 [TCP Retransmission] 443 =E2=86=92 56467 [ACK] Seq=3D1 Ack=3D1 Win=3D17 Len=3D14= 60 31888 32.595931 XXX.XXX.XXX.XXX =E2=86=92 YYY.YYY.YYY.YYY TCP 1514 [TCP Retransmission] 443 =E2=86=92 56467 [ACK] Seq=3D1 Ack=3D1 Win=3D17 Len=3D14= 60 XXX.XXX.XXX.XXX - my IP YYY.YYY.YYY.YYY - client IP Those TCP sessions produce 10-100Mbit traffic from my server to clients. Pl= ease check attached screenshot. --=20 You are receiving this mail because: You are on the CC list for the bug.=