From owner-freebsd-net@freebsd.org Wed Mar 17 15:30:16 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 703FD56CA5B for ; Wed, 17 Mar 2021 15:30:16 +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 4F0vHD2Z3Hz4Xnw for ; Wed, 17 Mar 2021 15:30:16 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 5802856CD64; Wed, 17 Mar 2021 15:30:16 +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 57CDB56CA5A for ; Wed, 17 Mar 2021 15:30:16 +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 4F0vHD1xDKz4XgZ for ; Wed, 17 Mar 2021 15:30:16 +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 34A5B11580 for ; Wed, 17 Mar 2021 15:30:16 +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 12HFUGxw027946 for ; Wed, 17 Mar 2021 15:30:16 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 12HFUGrD027945 for net@FreeBSD.org; Wed, 17 Mar 2021 15:30:16 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 254309] [tcp] frequent panics in tcp_output Date: Wed, 17 Mar 2021 15:30:16 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 13.0-STABLE X-Bugzilla-Keywords: panic X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: rscheff@freebsd.org X-Bugzilla-Status: In Progress X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: rscheff@freebsd.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: assigned_to bug_status 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: Wed, 17 Mar 2021 15:30:16 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D254309 Richard Scheffenegger changed: What |Removed |Added ---------------------------------------------------------------------------- Assignee|net@FreeBSD.org |rscheff@freebsd.org Status|New |In Progress --- Comment #11 from Richard Scheffenegger --- See https://reviews.freebsd.org/D29315=20 flags =3D 17 -> 0x11, 0x10 is TF_SENTFIN, TF_ACKNOW and 6675pipe is enabled, enabling the new rescue-retransmission. Further, this is stated to be a web server, where it is likely that http/1.0 tcp sessions are closed right after an object was sent, and if the very last segment with the FIN is dropped by the network, the rescue retransmission c= ode tried to include the "data byte" of the FIN (which doesn't exist really, on= ly as the last octet in the sequence space stream). --=20 You are receiving this mail because: You are the assignee for the bug.=