From owner-freebsd-net@freebsd.org Thu Jan 10 02:43:42 2019 Return-Path: Delivered-To: freebsd-net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id A81881498102 for ; Thu, 10 Jan 2019 02:43:42 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 2A97C8A3DA for ; Thu, 10 Jan 2019 02:43:42 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: by mailman.ysv.freebsd.org (Postfix) id DCE631498100; Thu, 10 Jan 2019 02:43:41 +0000 (UTC) Delivered-To: net@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id BA91114980FF for ; Thu, 10 Jan 2019 02:43:41 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.ysv.freebsd.org (mxrelay.ysv.freebsd.org [IPv6:2001:1900:2254:206a::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.ysv.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 485E18A3D4 for ; Thu, 10 Jan 2019 02:43:41 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.ysv.freebsd.org (Postfix) with ESMTPS id 8D6EB18019 for ; Thu, 10 Jan 2019 02:43:40 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id x0A2heLT048035 for ; Thu, 10 Jan 2019 02:43:40 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id x0A2he9n048034 for net@FreeBSD.org; Thu, 10 Jan 2019 02:43:40 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 233535] Fix refcount leak in IPv6 MLD code leading to loss of IPv6 connectivity Date: Thu, 10 Jan 2019 02:43:40 +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 Some People X-Bugzilla-Who: ae@FreeBSD.org X-Bugzilla-Status: In Progress X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: hselasky@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: Thu, 10 Jan 2019 02:43:42 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D233535 --- Comment #30 from Andrey V. Elsukov --- (In reply to Hans Petter Selasky from comment #27) > Created attachment 200956 [details] > Fix MLD refcounting in IPv6 code. >=20 > Hi, >=20 > Please test this patch while watching: >=20 > vmstat -m | grep multi It still leaks. The memory leak is unimportant problem. The much worse is t= hat system leaves multicast groups when you do an address configuration several times. When system leaves multicast groups, it stops respond to ND6 NS, and becomes unresponsive for neighbors. # vmstat -m | grep multi ether_multi 61 5K - 135 16,32,64,128 in_multi 2 1K - 3 256 in6_multi 33 6K - 73 32,256 # ifmcstat -i re0 re0: inet 10.9.8.12 igmpv2 group 224.0.0.1 mode exclude mcast-macaddr 01:00:5e:00:00:01 inet6 fe80::1ebd:b9ff:fede:d7d%re0 scopeid 0x2 mldv1 flags=3D2 group ff01::1%re0 scopeid 0x2 mode exclude mcast-macaddr 33:33:00:00:00:01 group ff02::1%re0 scopeid 0x2 mode exclude mcast-macaddr 33:33:00:00:00:01 # ifconfig re0 inet6 fc00::1 # vmstat -m | grep multi ether_multi 76 6K - 150 16,32,64,128 in_multi 2 1K - 3 256 in6_multi 39 7K - 81 32,256 # ifmcstat -i re0 re0: inet6 fe80::1ebd:b9ff:fede:d7d%re0 scopeid 0x2 mldv1 flags=3D2 group ff02::2:d4f1:c447%re0 scopeid 0x2 mode exclude mcast-macaddr 33:33:d4:f1:c4:47 group ff02::2:ffd4:f1c4%re0 scopeid 0x2 mode exclude mcast-macaddr 33:33:ff:d4:f1:c4 group ff02::1:ff00:1%re0 scopeid 0x2 mode exclude mcast-macaddr 33:33:ff:00:00:01 inet 10.9.8.12 igmpv2 group 224.0.0.1 mode exclude mcast-macaddr 01:00:5e:00:00:01 inet6 fe80::1ebd:b9ff:fede:d7d%re0 scopeid 0x2 mldv1 flags=3D2 group ff01::1%re0 scopeid 0x2 mode exclude mcast-macaddr 33:33:00:00:00:01 group ff02::1%re0 scopeid 0x2 mode exclude mcast-macaddr 33:33:00:00:00:01 # ifconfig re0 inet6 fc00::1 # vmstat -m | grep multi ether_multi 70 6K - 165 16,32,64,128 in_multi 2 1K - 3 256 in6_multi 36 6K - 89 32,256 # ifmcstat -i re0 re0: inet 10.9.8.12 igmpv2 group 224.0.0.1 mode exclude mcast-macaddr 01:00:5e:00:00:01 inet6 fe80::1ebd:b9ff:fede:d7d%re0 scopeid 0x2 mldv1 flags=3D2 group ff01::1%re0 scopeid 0x2 mode exclude mcast-macaddr 33:33:00:00:00:01 group ff02::1%re0 scopeid 0x2 mode exclude mcast-macaddr 33:33:00:00:00:01 # ifconfig re0 inet6 fc00::1 # vmstat -m | grep multi ether_multi 85 7K - 180 16,32,64,128 in_multi 2 1K - 3 256 in6_multi 42 7K - 97 32,256 # ifmcstat -i re0 re0: inet6 fe80::1ebd:b9ff:fede:d7d%re0 scopeid 0x2 mldv1 flags=3D2 group ff02::2:d4f1:c447%re0 scopeid 0x2 mode exclude mcast-macaddr 33:33:d4:f1:c4:47 group ff02::2:ffd4:f1c4%re0 scopeid 0x2 mode exclude mcast-macaddr 33:33:ff:d4:f1:c4 group ff02::1:ff00:1%re0 scopeid 0x2 mode exclude mcast-macaddr 33:33:ff:00:00:01 inet 10.9.8.12 igmpv2 group 224.0.0.1 mode exclude mcast-macaddr 01:00:5e:00:00:01 inet6 fe80::1ebd:b9ff:fede:d7d%re0 scopeid 0x2 mldv1 flags=3D2 group ff01::1%re0 scopeid 0x2 mode exclude mcast-macaddr 33:33:00:00:00:01 group ff02::1%re0 scopeid 0x2 mode exclude mcast-macaddr 33:33:00:00:00:01 # ifconfig re0 inet6 fc00::1 # ifmcstat -i re0 re0: inet 10.9.8.12 igmpv2 group 224.0.0.1 mode exclude mcast-macaddr 01:00:5e:00:00:01 inet6 fe80::1ebd:b9ff:fede:d7d%re0 scopeid 0x2 mldv1 flags=3D2 group ff01::1%re0 scopeid 0x2 mode exclude mcast-macaddr 33:33:00:00:00:01 group ff02::1%re0 scopeid 0x2 mode exclude mcast-macaddr 33:33:00:00:00:01 # vmstat -m | grep multi ether_multi 79 6K - 195 16,32,64,128 in_multi 2 1K - 3 256 in6_multi 39 7K - 105 32,256 .... # vmstat -m | grep multi ether_multi 127 10K - 315 16,32,64,128 in_multi 2 1K - 3 256 in6_multi 56 11K - 169 32,256 --=20 You are receiving this mail because: You are on the CC list for the bug.=