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Cong Wang da34873e8f ipv6: fix memory leaks on IPV6_ADDRFORM path 
[ Upstream commit 8c0de6e96c ]

IPV6_ADDRFORM causes resource leaks when converting an IPv6 socket
to IPv4, particularly struct ipv6_ac_socklist. Similar to
struct ipv6_mc_socklist, we should just close it on this path.

This bug can be easily reproduced with the following C program:

  #include <stdio.h>
  #include <string.h>
  #include <sys/types.h>
  #include <sys/socket.h>
  #include <arpa/inet.h>

  int main()
  {
    int s, value;
    struct sockaddr_in6 addr;
    struct ipv6_mreq m6;

    s = socket(AF_INET6, SOCK_DGRAM, 0);
    addr.sin6_family = AF_INET6;
    addr.sin6_port = htons(5000);
    inet_pton(AF_INET6, "::ffff:192.168.122.194", &addr.sin6_addr);
    connect(s, (struct sockaddr *)&addr, sizeof(addr));

    inet_pton(AF_INET6, "fe80::AAAA", &m6.ipv6mr_multiaddr);
    m6.ipv6mr_interface = 5;
    setsockopt(s, SOL_IPV6, IPV6_JOIN_ANYCAST, &m6, sizeof(m6));

    value = AF_INET;
    setsockopt(s, SOL_IPV6, IPV6_ADDRFORM, &value, sizeof(value));

    close(s);
    return 0;
  }

Reported-by: ch3332xr@gmail.com
Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-08-21 09:48:00 +02:00
..
9p
…
bluetooth
Bluetooth: Align minimum encryption key size for LE and BR/EDR connections
2019-06-25 11:36:54 +08:00
caif
caif: reduce stack size with KASAN
2019-05-08 07:20:45 +02:00
iucv
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
netfilter
netfilter: conntrack: avoid gcc-10 zero-length-bounds warning
2020-05-20 08:17:09 +02:00
netns
tcp: add tcp_min_snd_mss sysctl
2019-06-17 19:52:44 +02:00
nfc
nfc: nci: Potential off by one in ->pipes[] array
2019-05-16 19:42:32 +02:00
phonet
phonet: fix building with clang
2019-03-23 14:35:16 +01:00
sctp
sctp: Don't advertise IPv4 addresses if ipv6only is set on the socket
2020-06-30 15:37:59 -04:00
tc_act
net/sched: don't dereference a->goto_chain to read the chain index
2019-05-04 09:15:20 +02:00
6lowpan.h
…
act_api.h
net sched: fix reporting the first-time use timestamp
2020-06-03 08:17:33 +02:00
addrconf.h
ipv6: fix memory leaks on IPV6_ADDRFORM path
2020-08-21 09:48:00 +02:00
af_ieee802154.h
…
af_rxrpc.h
rxrpc: Allow failed client calls to be retried
2017-08-29 10:55:20 +01:00
af_unix.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
af_vsock.h
VSOCK: use TCP state constants for sk_state
2019-08-04 09:31:59 +02:00
ah.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
arp.h
ipv4: Define __ipv4_neigh_lookup_noref when CONFIG_INET is disabled
2019-06-11 12:21:51 +02:00
atmclip.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ax25.h
ax25: fix possible use-after-free
2019-02-23 09:06:44 +01:00
ax88796.h
…
bond_3ad.h
…
bond_alb.h
…
bond_options.h
…
bonding.h
bonding: fix state transition issue in link monitoring
2019-11-12 19:17:46 +01:00
busy_poll.h
net: annotate lockless accesses to sk->sk_napi_id
2019-11-10 11:25:24 +01:00
calipso.h
…
cfg80211-wext.h
…
cfg80211.h
cfg80211: Fix radar event during another phy CAC
2020-02-05 14:18:21 +00:00
cfg802154.h
…
checksum.h
…
cipso_ipv4.h
…
cls_cgroup.h
…
codel_impl.h
…
codel_qdisc.h
…
codel.h
…
compat.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
datalink.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dcbevent.h
…
dcbnl.h
…
devlink.h
devlink: Add IPv6 header for dpipe
2017-08-31 14:42:19 -07:00
dn_dev.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dn_fib.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dn_neigh.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dn_nsp.h
…
dn_route.h
…
dn.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dsa.h
net: dsa: Allow switch drivers to indicate number of TX queues
2017-09-05 11:53:34 -07:00
dsfield.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dst_cache.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dst_metadata.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dst_ops.h
net: add bool confirm_neigh parameter for dst_ops.update_pmtu
2020-01-04 14:00:14 +01:00
dst.h
net: Added pointer check for dst->ops->neigh_lookup in dst_neigh_lookup_skb
2020-07-22 09:22:20 +02:00
erspan.h
gre: introduce native tunnel support for ERSPAN
2017-08-22 14:29:30 -07:00
esp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ethoc.h
…
fib_notifier.h
net: Add module reference to FIB notifiers
2017-09-01 20:33:42 -07:00
fib_rules.h
fib: add missing attribute validation for tun_id
2020-03-20 10:54:10 +01:00
firewire.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
flow_dissector.h
net: sched: correct flower port blocking
2020-03-11 18:02:48 +01:00
flow.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
fou.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
fq_impl.h
net/flow_dissector: switch to siphash
2019-11-10 11:25:37 +01:00
fq.h
net/flow_dissector: switch to siphash
2019-11-10 11:25:37 +01:00
garp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
gen_stats.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
genetlink.h
genetlink: remove genl_bind
2020-07-22 09:22:19 +02:00
geneve.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
gre.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
gro_cells.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
gtp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
gue.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
hwbm.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
icmp.h
net: Add __icmp_send helper.
2019-03-13 14:03:09 -07:00
ieee80211_radiotap.h
…
ieee802154_netdev.h
…
if_inet6.h
…
ife.h
net: sched: ife: handle malformed tlv length
2018-04-29 11:33:13 +02:00
ila.h
…
inet6_connection_sock.h
…
inet6_hashtables.h
…
inet_common.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
inet_connection_sock.h
…
inet_ecn.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
inet_frag.h
net: IP defrag: encapsulate rbtree defrag code into callable functions
2019-04-27 09:35:40 +02:00
inet_hashtables.h
tcp/dccp: fix possible race __inet_lookup_established()
2020-01-04 14:00:19 +01:00
inet_sock.h
inet: make sure to grab rcu_read_lock before using ireq->ireq_opt
2018-10-18 09:16:21 +02:00
inet_timewait_sock.h
soreuseport: initialise timewait reuseport field
2018-05-16 10:10:24 +02:00
inetpeer.h
net: ipv4: use a dedicated counter for icmp_v4 redirect packets
2019-02-23 09:06:42 +01:00
ip6_checksum.h
…
ip6_fib.h
ipv6: fix the check before getting the cookie in rt6_get_cookie
2019-06-11 12:21:47 +02:00
ip6_route.h
net: ipv6: do not consider routes via gateways for anycast address check
2020-04-24 08:00:53 +02:00
ip6_tunnel.h
ip6_tunnel: allow not to count pkts on tstats by passing dev as NULL
2019-07-21 09:04:28 +02:00
ip_fib.h
net: ipv4: Fix memory leak in network namespace dismantle
2019-01-31 08:13:42 +01:00
ip_tunnels.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ip_vs.h
ipvs: move old_secure_tcp into struct netns_ipvs
2019-11-12 19:18:38 +01:00
ip.h
inet: protect against too small mtu values.
2019-12-21 10:47:38 +01:00
ipcomp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ipconfig.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ipv6_frag.h
ip6: fix skb leak in ip6frag_expire_frag_queue()
2019-09-16 08:20:44 +02:00
ipv6.h
net: ipv6: add net argument to ip6_dst_lookup_flow
2020-05-20 08:17:02 +02:00
ipx.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
iw_handler.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
kcm.h
…
l3mdev.h
ipvlan, l3mdev: fix broken l3s mode wrt local routes
2019-02-06 17:31:33 +01:00
lapb.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
lib80211.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
llc_c_ac.h
…
llc_c_ev.h
…
llc_c_st.h
…
llc_conn.h
llc: fix sk_buff leak in llc_conn_service()
2019-11-06 12:43:36 +01:00
llc_if.h
…
llc_pdu.h
…
llc_s_ac.h
…
llc_s_ev.h
…
llc_s_st.h
…
llc_sap.h
…
llc.h
llc: avoid blocking in llc_sap_close()
2019-11-20 17:59:59 +01:00
lwtunnel.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mac80211.h
mac80211: round IEEE80211_TX_STATUS_HEADROOM up to multiple of 4
2018-05-30 07:51:58 +02:00
mac802154.h
…
mip6.h
…
mld.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
mpls_iptunnel.h
…
mpls.h
…
mrp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ncsi.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ndisc.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
neighbour.h
net: add annotations on hh->hh_len lockless accesses
2020-01-09 10:17:59 +01:00
net_namespace.h
netns: provide pure entropy for net_hash_mix()
2019-04-17 08:37:50 +02:00
net_ratelimit.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
netevent.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
netlabel.h
…
netlink.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
netprio_cgroup.h
…
netrom.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
nexthop.h
net: fix rtnh_ok()
2018-05-16 10:10:23 +02:00
nl802154.h
…
nsh.h
net: add NSH header structures and helpers
2017-08-29 15:16:52 -07:00
p8022.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ping.h
…
pkt_cls.h
net_sched: introduce tcf_exts_get_net() and tcf_exts_put_net()
2017-11-09 10:03:09 +09:00
pkt_sched.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
pptp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
protocol.h
IPv4: early demux can return an error code
2017-10-01 03:55:47 +01:00
psample.h
net: sched: act_sample: fix psample group handling on overwrite
2019-09-10 10:32:21 +01:00
psnap.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
raw.h
…
rawv6.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
red.h
net_sched: red: Avoid illegal values
2018-02-25 11:07:59 +01:00
regulatory.h
regulatory: add NUL to request alpha2
2018-05-30 07:52:01 +02:00
request_sock.h
net: add {READ|WRITE}_ONCE() annotations on ->rskq_accept_head
2020-01-27 14:46:50 +01:00
rose.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
route.h
ipv4: lock mtu in fnhe when received PMTU < net.ipv4.route.min_pmtu
2018-05-30 07:52:14 +02:00
rtnetlink.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sch_generic.h
sch_netem: fix rcu splat in netem_enqueue()
2019-11-06 12:43:39 +01:00
scm.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
secure_seq.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
seg6_hmac.h
…
seg6.h
ipv6: sr: add support for ip4ip6 encapsulation
2017-08-25 17:10:23 -07:00
slhc_vj.h
slip: Check if rstate is initialized before uncompressing
2018-04-19 08:56:16 +02:00
smc.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
snmp.h
…
sock_reuseport.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sock.h
net: Do not clear the sock TX queue in sk_set_socket()
2020-06-30 15:38:00 -04:00
Space.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
stp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
strparser.h
strparser: Use delayed work instead of timer for msg timeout
2017-10-25 10:37:11 +09:00
switchdev.h
…
tcp_states.h
…
tcp.h
tcp: cache line align MAX_TCP_HEADER
2020-05-02 17:24:17 +02:00
timewait_sock.h
…
tls.h
tls: Fix TLS ulp context leak, when TLS_TX setsockopt is not used.
2018-12-05 19:41:10 +01:00
transp_v6.h
udp: fix rx queue len reported by diag and proc interface
2018-06-26 08:06:28 +08:00
tso.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
tun_proto.h
vxlan: factor out VXLAN-GPE next protocol
2017-08-29 15:16:52 -07:00
udp_tunnel.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
udp.h
udp: fix rx queue len reported by diag and proc interface
2018-06-26 08:06:28 +08:00
udplite.h
udplite: fix partial checksum initialization
2018-03-08 22:41:10 -08:00
vsock_addr.h
…
vxlan.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
wext.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
wimax.h
…
x25.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
x25device.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
xfrm.h
xfrm: clean up xfrm protocol checks
2019-09-16 08:20:44 +02:00