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Cong Wang 9c8652db5c 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>
2020-08-11 15:32:34 +02:00
..
9p
9p: Add refcount to p9_req_t
2019-07-03 13:14:42 +02:00
bluetooth
Bluetooth: Align minimum encryption key size for LE and BR/EDR connections
2019-06-25 11:36:01 +08:00
caif
caif: reduce stack size with KASAN
2018-01-19 14:02:12 -05:00
iucv
Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL
2018-06-28 10:40:47 -07:00
netfilter
netfilter: conntrack: avoid gcc-10 zero-length-bounds warning
2020-05-20 08:18:43 +02:00
netns
tcp: add tcp_min_snd_mss sysctl
2019-06-17 19:51:56 +02:00
nfc
nfc: nci: Potential off by one in ->pipes[] array
2019-05-16 19:41:27 +02:00
phonet
phonet: fix building with clang
2019-03-23 20:09:51 +01:00
sctp
sctp: Don't advertise IPv4 addresses if ipv6only is set on the socket
2020-06-30 23:17:05 -04:00
tc_act
net/sched: don't dereference a->goto_chain to read the chain index
2019-05-04 09:20:18 +02:00
6lowpan.h
…
act_api.h
net sched: fix reporting the first-time use timestamp
2020-06-03 08:19:15 +02:00
addrconf.h
ipv6: fix memory leaks on IPV6_ADDRFORM path
2020-08-11 15:32:34 +02:00
af_ieee802154.h
ieee802154: add rx LQI from userspace
2018-07-13 12:18:18 -04:00
af_rxrpc.h
rxrpc: Push iov_iter up from rxrpc_kernel_recv_data() to caller
2018-08-03 12:46:20 -07:00
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: split dwork to avoid reinitializations
2018-08-07 12:39:13 -07:00
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 12:20:57 +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 09:07:27 +01:00
ax88796.h
net-next: ax88796: add interrupt status callback to platform data
2018-04-19 16:11:11 -04:00
bond_3ad.h
include/net/bond_3ad: Simplify the code by using the ARRAY_SIZE
2018-08-04 13:23:15 -07:00
bond_alb.h
…
bond_options.h
…
bonding.h
bonding: fix state transition issue in link monitoring
2019-11-12 19:20:26 +01:00
busy_poll.h
net: annotate lockless accesses to sk->sk_napi_id
2019-11-10 11:27:39 +01:00
calipso.h
…
cfg80211-wext.h
…
cfg80211.h
cfg80211: Fix radar event during another phy CAC
2020-02-05 14:43:46 +00:00
cfg802154.h
…
checksum.h
…
cipso_ipv4.h
…
cls_cgroup.h
…
codel_impl.h
…
codel_qdisc.h
…
codel.h
…
compat.h
net: remove compat_sys_*() prototypes from net/compat.h
2018-04-02 20:16:17 +02:00
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
net: dcb: Add priority-to-DSCP map getters
2018-07-27 13:17:50 -07:00
devlink.h
devlink: Add helper function for safely copy string param
2018-10-10 10:19:10 -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
net/decnet: Convert timers to use timer_setup()
2017-10-18 12:39:36 +01:00
dn_route.h
decnet: Move dn_next into decnet route structure.
2017-11-30 09:54:25 -05:00
dn.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2017-11-04 09:26:51 +09:00
dsa.h
net: dsa: Remove VLA usage
2018-07-18 15:08:31 -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
net: core: dst_cache_set_ip6: Rename 'addr' parameter to 'saddr' for consistency
2018-03-05 12:52:45 -05:00
dst_metadata.h
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2017-11-04 09:26:51 +09:00
dst_ops.h
net: add bool confirm_neigh parameter for dst_ops.update_pmtu
2020-01-04 19:13:37 +01:00
dst.h
net: Added pointer check for dst->ops->neigh_lookup in dst_neigh_lookup_skb
2020-07-22 09:31:59 +02:00
erspan.h
erspan: set bso bit based on mirrored packet's len
2018-05-20 18:31:42 -04:00
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
inet: whitespace cleanup
2018-02-28 11:43:28 -05:00
failover.h
net: Introduce generic failover module
2018-05-28 22:59:54 -04:00
fib_notifier.h
net: Add extack to fib_notifier_info
2017-11-01 11:50:43 +09:00
fib_rules.h
fib: add missing attribute validation for tun_id
2020-03-18 07:14:14 +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
2020-03-05 16:42:16 +01:00
flow.h
xfrm: Remove xfrmi interface ID from flowi
2018-07-20 10:14:41 +02:00
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/fq_impl: Switch to kvmalloc() for memory allocation
2019-12-05 09:19:45 +01:00
fq.h
net/flow_dissector: switch to siphash
2019-11-10 11:27:54 +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
net: core: protect rate estimator statistics pointer with lock
2018-08-11 12:37:10 -07:00
genetlink.h
genetlink: remove genl_bind
2020-07-22 09:31:58 +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
net: GRE: Add is_gretap_dev, is_ip6gretap_dev
2018-02-27 14:46:26 -05:00
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
fou: fix some member types in guehdr
2017-12-11 14:10:06 -05:00
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.
2019-03-10 07:17:19 +01:00
ieee80211_radiotap.h
radiotap: add structs for HE
2018-06-15 14:04:00 +02:00
ieee802154_netdev.h
…
if_inet6.h
net/ipv6: Add support for specifying metric of connected routes
2018-05-29 10:12:45 -04:00
ife.h
net: sched: ife: handle malformed tlv length
2018-04-22 21:12:00 -04:00
ila.h
…
inet6_connection_sock.h
…
inet6_hashtables.h
…
inet_common.h
net: Convert GRO SKB handling to list_head.
2018-06-26 11:33:04 +09:00
inet_connection_sock.h
inet/connection_sock: prefer _THIS_IP_ to current_text_addr
2018-08-14 10:04:36 -07:00
inet_ecn.h
sched: consistently handle layer3 header accesses in the presence of VLANs
2020-07-22 09:32:00 +02:00
inet_frag.h
net: IP defrag: encapsulate rbtree defrag code into callable functions
2019-04-27 09:36:33 +02:00
inet_hashtables.h
tcp/dccp: fix possible race __inet_lookup_established()
2020-01-04 19:13:41 +01:00
inet_sock.h
inet: make sure to grab rcu_read_lock before using ireq->ireq_opt
2018-10-02 15:52:12 -07:00
inet_timewait_sock.h
net-tcp: remove useless tw_timeout field
2018-06-05 10:45:24 -04:00
inetpeer.h
net: ipv4: use a dedicated counter for icmp_v4 redirect packets
2019-02-23 09:07:24 +01:00
ip6_checksum.h
…
ip6_fib.h
ipv6: fix the check before getting the cookie in rt6_get_cookie
2019-06-11 12:20:48 +02:00
ip6_route.h
net: ipv6: do not consider routes via gateways for anycast address check
2020-04-21 09:03:04 +02:00
ip6_tunnel.h
ip6_tunnel: allow not to count pkts on tstats by passing dev as NULL
2019-07-14 08:11:14 +02:00
ip_fib.h
net: ipv4: Fix memory leak in network namespace dismantle
2019-01-31 08:14:32 +01:00
ip_tunnels.h
ip: validate header length on virtual device xmit
2019-01-09 17:38:31 +01:00
ip_vs.h
ipvs: move old_secure_tcp into struct netns_ipvs
2019-11-12 19:21:01 +01:00
ip.h
inet: protect against too small mtu values.
2019-12-21 10:57:08 +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()
2019-07-10 09:53:46 +02:00
ipv6.h
net: ipv6: add net argument to ip6_dst_lookup_flow
2020-04-29 16:31:16 +02:00
ipx.h
bonding/alb: properly access headers in bond_alb_xmit()
2020-02-11 04:34:14 -08:00
iw_handler.h
net: Spelling s/stucture/structure/
2018-03-27 09:51:23 +02:00
kcm.h
…
l3mdev.h
ipvlan, l3mdev: fix broken l3s mode wrt local routes
2019-02-06 17:30:06 +01:00
lag.h
net: Add lag.h, net_lag_port_dev_txable()
2018-07-11 23:10:19 -07:00
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
net: LLC: Convert timers to use timer_setup()
2017-10-25 12:06:25 +09:00
llc_c_ev.h
…
llc_c_st.h
…
llc_conn.h
llc: fix sk_buff leak in llc_conn_service()
2019-11-06 13:06:23 +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 18:46:35 +01:00
lwtunnel.h
net: Move ipv4 set_lwt_redirect helper to lwtunnel
2018-02-14 14:43:32 -05:00
mac80211.h
mac80211: add support for HE
2018-06-18 22:40:32 +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 10:19:09 +01:00
net_failover.h
net: Introduce net_failover driver
2018-05-28 22:59:54 -04:00
net_namespace.h
netns: fix GFP flags in rtnl_net_notifyid()
2019-11-10 11:27:42 +01:00
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
net: ipv4: Notify about changes to ip_forward_update_priority
2018-08-01 09:52:30 -07:00
netlabel.h
…
netlink.h
netlink: fix typo in nla_parse_nested() comment
2018-09-29 11:48:26 -07:00
netprio_cgroup.h
…
netrom.h
net: netrom: Fix error cleanup path of nr_proto_init
2019-05-02 09:58:57 +02:00
nexthop.h
net: fix rtnh_ok()
2018-04-07 22:32:31 -04:00
nl802154.h
…
nsh.h
openvswitch: enable NSH support
2017-11-08 16:12:33 +09:00
p8022.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
page_pool.h
xdp: introduce xdp_return_frame_rx_napi
2018-05-24 18:36:15 -07:00
ping.h
ipv{4,6}/ping: simplify proc file creation
2018-05-16 07:23:35 +02:00
pkt_cls.h
net_sched: fix ops->bind_class() implementations
2020-02-01 09:37:06 +00:00
pkt_sched.h
sched: consistently handle layer3 header accesses in the presence of VLANs
2020-07-22 09:32:00 +02:00
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
…
psample.h
net: sched: act_sample: fix psample group handling on overwrite
2019-09-10 10:33:38 +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
ipv{4,6}/raw: simplify ѕeq_file code
2018-05-16 07:23:35 +02:00
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
2017-12-05 14:37:13 -05:00
regulatory.h
cfg80211: make wmm_rule part of the reg_rule structure
2018-08-28 11:11:47 +02:00
request_sock.h
net: add {READ|WRITE}_ONCE() annotations on ->rskq_accept_head
2020-01-27 14:51:18 +01:00
rose.h
proc: introduce proc_create_seq{,_data}
2018-05-16 07:23:35 +02:00
route.h
net/ipv4: Add support for specifying metric of connected routes
2018-05-29 10:12:45 -04:00
rsi_91x.h
Bluetooth: btrsi: add new rsi bluetooth driver
2018-03-13 18:37:02 +02:00
rtnetlink.h
rtnetlink: Remove VLA usage
2018-05-31 22:48:46 -04:00
sch_generic.h
net_sched: fix ops->bind_class() implementations
2020-02-01 09:37:06 +00:00
scm.h
pids: Compute task_tgid using signal->leader_pid
2018-07-21 10:43:12 -05:00
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
rhashtable: split rhashtable.h
2018-06-22 13:43:27 +09:00
seg6_local.h
bpf: add End.DT6 action to bpf_lwt_seg6_action helper
2018-07-31 09:22:48 +02:00
seg6.h
rhashtable: split rhashtable.h
2018-06-22 13:43:27 +09:00
slhc_vj.h
slip: Check if rstate is initialized before uncompressing
2018-04-11 10:33:46 -04:00
smc.h
net/smc: add pnetid support for SMC-D and ISM
2018-06-30 20:42:25 +09:00
snmp.h
…
sock_reuseport.h
udp: correct reuseport selection with connected sockets
2019-09-21 07:16:43 +02:00
sock.h
net: Do not clear the sock TX queue in sk_set_socket()
2020-06-30 23:17:06 -04:00
Space.h
net/mac89x0: Convert to platform_driver
2018-03-01 21:21:36 -05:00
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: Add __strp_unpause and use it in ktls.
2018-06-06 14:07:53 -04:00
switchdev.h
switchdev: Add fdb.added_by_user to switchdev notifications
2018-05-03 13:46:47 -04:00
tcp_states.h
tcp: remove the hardcode in the definition of TCPF Macro
2018-02-21 15:06:05 -05:00
tcp.h
tcp: fix SO_RCVLOWAT hangs with fat skbs
2020-05-20 08:18:38 +02:00
timewait_sock.h
…
tipc.h
flow_dissector: do not rely on implicit casts
2018-05-08 00:02:41 -04:00
tls.h
net/tls: make sure offload also gets the keys wiped
2019-07-28 08:29:27 +02:00
transp_v6.h
ipv6: fold sockcm_cookie into ipcm6_cookie
2018-07-07 10:58:49 +09:00
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
…
udp_tunnel.h
net: Convert GRO SKB handling to list_head.
2018-06-26 11:33:04 +09:00
udp.h
Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net
2018-07-03 10:29:26 +09:00
udplite.h
udplite: fix partial checksum initialization
2018-02-16 15:57:42 -05:00
vsock_addr.h
…
vxlan.h
vxlan: add ttl inherit support
2018-04-17 13:53:13 -04:00
wext.h
lift handling of SIOCIW... out of dev_ioctl()
2018-01-24 19:13:45 -05:00
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
xdp_sock.h
xsk: fix umem memory leak on cleanup
2019-05-04 09:20:12 +02:00
xdp.h
xdp: Helper function to clear kernel pointers in xdp_frame
2018-08-10 16:12:20 +02:00
xfrm.h
xfrm: Fix crash when the hold queue is used.
2020-08-05 10:06:02 +02:00