From owner-freebsd-net@freebsd.org Mon Jan 13 20:02:16 2020 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 956C61EAF24 for ; Mon, 13 Jan 2020 20:02:16 +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 47xPd43T0Xz4712 for ; Mon, 13 Jan 2020 20:02:16 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.nyi.freebsd.org (Postfix) id 76F381EAF22; Mon, 13 Jan 2020 20:02:16 +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 76B481EAF21 for ; Mon, 13 Jan 2020 20:02:16 +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) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 47xPd42dgmz470y for ; Mon, 13 Jan 2020 20:02:16 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 5412F9F8F for ; Mon, 13 Jan 2020 20:02:16 +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 00DK2Gha003117 for ; Mon, 13 Jan 2020 20:02:16 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 00DK2GES003116 for net@FreeBSD.org; Mon, 13 Jan 2020 20:02:16 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 243319] Panicked laptop & local network ARP flood Date: Mon, 13 Jan 2020 20:02:15 +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: CURRENT X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: cem@freebsd.org X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@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: 2.1.29 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 13 Jan 2020 20:02:16 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D243319 --- Comment #6 from Conrad Meyer --- These are different requesters? It would help to spell out which IP(s) are= the panic'd laptop. 07:55:53.025959 ARP, Request who-has 10.6.112.1 tell 10.6.112.16, length 46 07:55:53.025980 ARP, Request who-has 10.6.112.1 tell 10.6.112.18, length 46 ^^ If you don't have debugnet enabled I don't see any obvious reason debugnet would be ARPing. Plus, debugnet isn't *that* spammy and the number of ARPs= it sends is bounded; it gives up after a few tries (like, 3?). You would see obvious prints as a side effect of debugnet-enabled dump being attempted af= ter the panic, and an obvious print when the ARP request failed. If anything, I suspect this is some NIC internal firmware/hardware behavior= due to the panic'd machine not processing RX queues or something. --=20 You are receiving this mail because: You are on the CC list for the bug.=