Date: Thu, 10 Jan 2019 02:43:40 +0000 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 Message-ID: <bug-233535-7501-VRLdzhoo03@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-233535-7501@https.bugs.freebsd.org/bugzilla/> References: <bug-233535-7501@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D233535 --- Comment #30 from Andrey V. Elsukov <ae@FreeBSD.org> --- (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<USEALLOW> 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<USEALLOW> 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<USEALLOW> 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<USEALLOW> 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<USEALLOW> 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<USEALLOW> 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<USEALLOW> 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.=
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