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linux/net/ipv4
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WANG Cong ef13840028 tcp: reset sk_rx_dst in tcp_disconnect() 
commit d747a7a51b upstream.

We have to reset the sk->sk_rx_dst when we disconnect a TCP
connection, because otherwise when we re-connect it this
dst reference is simply overridden in tcp_finish_connect().

This fixes a dst leak which leads to a loopback dev refcnt
leak. It is a long-standing bug, Kevin reported a very similar
(if not same) bug before. Thanks to Andrei for providing such
a reliable reproducer which greatly narrows down the problem.

Fixes: 41063e9dd1 ("ipv4: Early TCP socket demux.")
Reported-by: Andrei Vagin <avagin@gmail.com>
Reported-by: Kevin Xu <kaiwen.xu@hulu.com>
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>
History 2017-07-21 07:42:17 +02:00
..
netfilter netfilter: arp_tables: fix invoking 32bit "iptable -P INPUT ACCEPT" failed in 64bit kernel 2016-11-30 20:50:23 +01:00
af_inet.c net: ping: do not abuse udp_poll() 2017-06-14 15:05:52 +02:00
ah4.c ah4: Fix error return in ah_input(). 2015-08-25 13:38:50 -07:00
arp.c NET: Fix /proc/net/arp for AX.25 2017-06-17 06:41:50 +02:00
cipso_ipv4.c netlabel: out of bound access in cipso_v4_validate() 2017-02-18 15:11:41 +01:00
datagram.c net: Set sk_txhash from a random number 2015-07-29 22:44:04 -07:00
devinet.c netconf: add a notif when settings are created 2016-09-01 15:18:08 -07:00
esp4.c esp4: Fix integrity verification when ESN are used 2016-11-30 11:09:39 +01:00
fib_frontend.c net: Improve handling of failures on link and route dumps 2017-06-07 12:07:44 +02:00
fib_lookup.h ipv4: consider TOS in fib_select_default 2015-07-24 22:46:11 -07:00
fib_rules.c switchdev: remove FIB offload infrastructure 2016-09-28 04:48:00 -04:00
fib_semantics.c ipv4: add reference counting to metrics 2017-06-07 12:07:46 +02:00
fib_trie.c net: Improve handling of failures on link and route dumps 2017-06-07 12:07:44 +02:00
fou.c net: add recursion limit to GRO 2016-10-20 14:32:22 -04:00
gre_demux.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-06-30 05:03:36 -04:00
gre_offload.c net: add recursion limit to GRO 2016-10-20 14:32:22 -04:00
icmp.c net: icmp_route_lookup should use rt dev to determine L3 domain 2016-11-09 18:49:39 -05:00
igmp.c igmp: add a missing spin_lock_init() 2017-07-05 14:40:15 +02:00
inet_connection_sock.c dccp/tcp: do not inherit mc_list from parent 2017-06-07 12:07:42 +02:00
inet_diag.c net: inet: diag: expose the socket mark to privileged processes. 2016-09-08 16:13:09 -07:00
inet_fragment.c net: disable fragment reassembly if high_thresh is zero 2016-06-05 22:56:42 -04:00
inet_hashtables.c net: Require exact match for TCP socket lookups if dif is l3mdev 2016-10-17 10:17:05 -04:00
inet_timewait_sock.c timers, net/ipv4/inet: Initialize connection request timers as pinned 2016-07-07 10:35:06 +02:00
inetpeer.c net: Add helper function to compare inetpeer addresses 2015-08-28 13:32:36 -07:00
ip_forward.c ipv4: allow local fragmentation in ip_finish_output_gso() 2016-11-03 16:10:26 -04:00
ip_fragment.c net: rename IP_INC_STATS_BH() 2016-04-27 22:48:23 -04:00
ip_gre.c net/ip_tunnels: Introduce tunnel_id_to_key32() and key32_to_tunnel_id() 2016-09-10 20:53:55 -07:00
ip_input.c net: VRF: Pass original iif to ip_route_input() 2016-09-16 04:24:07 -04:00
ip_options.c net: ipv4: Convert IP network timestamps to be y2038 safe 2016-03-01 17:18:44 -05:00
ip_output.c tcp: fix mark propagation with fwmark_reflect enabled 2017-02-18 15:11:43 +01:00
ip_sockglue.c net-timestamp: avoid use-after-free in ip_recv_error 2017-05-03 08:36:36 -07:00
ip_tunnel.c ip_tunnel: add collect_md mode to IPIP tunnel 2016-09-17 10:13:07 -04:00
ip_tunnel_core.c net: Specify the owning module for lwtunnel ops 2017-02-04 09:47:11 +01:00
ip_vti.c vti: use right inner_mode for inbound inter address family policy checks 2016-09-09 09:02:08 +02:00
ipcomp.c ipv4: coding style: comparison for equality with NULL 2015-04-03 12:11:15 -04:00
ipconfig.c net: ipconfig: Fix NULL pointer dereference on RARP/BOOTP/DHCP timeout 2016-08-22 21:04:41 -07:00
ipip.c ip_tunnel: add collect_md mode to IPIP tunnel 2016-09-17 10:13:07 -04:00
ipmr.c ipv4: allow local fragmentation in ip_finish_output_gso() 2016-11-03 16:10:26 -04:00
Kconfig tcp: Set DEFAULT_TCP_CONG to bbr if DEFAULT_BBR is set 2016-11-28 12:15:00 -05:00
Makefile tcp_bbr: add BBR congestion control 2016-09-21 00:23:01 -04:00
netfilter.c netfilter: use skb_to_full_sk in ip_route_me_harder 2017-07-05 14:40:28 +02:00
ping.c ping: implement proper locking 2017-05-03 08:36:34 -07:00
proc.c net: Suppress the "Comparison to NULL could be written" warnings 2016-09-30 01:50:45 -04:00
protocol.c net: Export inet_offloads and inet6_offloads 2014-09-19 17:15:31 -04:00
raw.c ipv4, ipv6: ensure raw socket message is big enough to hold an IP header 2017-05-14 14:00:21 +02:00
route.c ipv4: add reference counting to metrics 2017-06-07 12:07:46 +02:00
syncookies.c net: rename NET_{ADD|INC}_STATS_BH() 2016-04-27 22:48:24 -04:00
sysctl_net_ipv4.c ipv4: use the right lock for ping_group_range 2016-10-22 16:23:12 -04:00
tcp.c tcp: reset sk_rx_dst in tcp_disconnect() 2017-07-21 07:42:17 +02:00
tcp_bbr.c tcp_bbr: add BBR congestion control 2016-09-21 00:23:01 -04:00
tcp_bic.c tcp: replace cnt & rtt with struct in pkts_acked() 2016-05-11 14:43:19 -04:00
tcp_cdg.c tcp: cdg: rename struct minmax in tcp_cdg.c to avoid a naming conflict 2016-09-21 00:22:59 -04:00
tcp_cong.c tcp: disallow cwnd undo when switching congestion control 2017-06-14 15:05:52 +02:00
tcp_cubic.c tcp: replace cnt & rtt with struct in pkts_acked() 2016-05-11 14:43:19 -04:00
tcp_dctcp.c dctcp: avoid bogus doubling of cwnd after loss 2016-10-31 15:16:28 -04:00
tcp_diag.c net: diag: Fix refcnt leak in error path destroying socket 2016-08-23 23:11:36 -07:00
tcp_fastopen.c tcp: initialize max window for a new fastopen socket 2017-02-04 09:47:10 +01:00
tcp_highspeed.c tcp: add tcp_in_slow_start helper 2015-07-09 14:22:52 -07:00
tcp_htcp.c tcp: replace cnt & rtt with struct in pkts_acked() 2016-05-11 14:43:19 -04:00
tcp_hybla.c tcp: do not slow start when cwnd equals ssthresh 2015-07-09 14:22:52 -07:00
tcp_illinois.c tcp: replace cnt & rtt with struct in pkts_acked() 2016-05-11 14:43:19 -04:00
tcp_input.c tcp: eliminate negative reordering in tcp_clean_rtx_queue 2017-06-07 12:07:44 +02:00
tcp_ipv4.c dccp/tcp: fix routing redirect race 2017-03-22 12:43:34 +01:00
tcp_lp.c tcp: fix wraparound issue in tcp_lp 2017-05-14 14:00:21 +02:00
tcp_metrics.c tcp: make nla_policy const 2016-09-01 14:09:01 -07:00
tcp_minisocks.c tcp: do not inherit fastopen_req from parent 2017-05-14 14:00:21 +02:00
tcp_nv.c tcp: add NV congestion control 2016-06-10 23:07:49 -07:00
tcp_offload.c gso: Support partial splitting at the frag_list pointer 2016-09-19 20:59:34 -04:00
tcp_output.c tcp: do not underestimate skb->truesize in tcp_trim_head() 2017-05-14 14:00:20 +02:00
tcp_probe.c tcp: tcp_probe: use spin_lock_bh() 2017-06-17 06:41:49 +02:00
tcp_rate.c tcp: export data delivery rate 2016-09-21 00:23:00 -04:00
tcp_recovery.c tcp: do not assume TCP code is non preemptible 2016-05-02 17:02:25 -04:00
tcp_scalable.c tcp: add tcp_in_slow_start helper 2015-07-09 14:22:52 -07:00
tcp_timer.c tcp: fix various issues for sockets morphing to listen state 2017-03-22 12:43:33 +01:00
tcp_vegas.c tcp: replace cnt & rtt with struct in pkts_acked() 2016-05-11 14:43:19 -04:00
tcp_vegas.h tcp: replace cnt & rtt with struct in pkts_acked() 2016-05-11 14:43:19 -04:00
tcp_veno.c tcp: replace cnt & rtt with struct in pkts_acked() 2016-05-11 14:43:19 -04:00
tcp_westwood.c tcp: replace cnt & rtt with struct in pkts_acked() 2016-05-11 14:43:19 -04:00
tcp_yeah.c tcp: cwnd does not increase in TCP YeAH 2016-09-08 17:16:12 -07:00
tunnel4.c tunnels: correct conditional build of MPLS and IPv6 2016-07-11 13:27:06 -07:00
udp.c udplite: call proper backlog handlers 2016-11-24 15:32:14 -05:00
udp_diag.c net: inet: diag: expose the socket mark to privileged processes. 2016-09-08 16:13:09 -07:00
udp_impl.h udplite: call proper backlog handlers 2016-11-24 15:32:14 -05:00
udp_offload.c net: add recursion limit to GRO 2016-10-20 14:32:22 -04:00
udp_tunnel.c net: Remove deprecated tunnel specific UDP offload functions 2016-06-17 20:23:32 -07:00
udplite.c udplite: call proper backlog handlers 2016-11-24 15:32:14 -05:00
xfrm4_input.c netfilter: Pass net into okfn 2015-09-17 17:18:37 -07:00
xfrm4_mode_beet.c ipv4: ERROR: code indent should use tabs where possible 2013-12-26 13:43:21 -05:00
xfrm4_mode_transport.c [IPSEC]: Use IPv6 calling convention as the convention for x->mode->output 2007-10-10 16:55:54 -07:00
xfrm4_mode_tunnel.c ipv4: hash net ptr into fragmentation bucket selection 2015-03-25 14:07:04 -04:00
xfrm4_output.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-10-24 06:54:12 -07:00
xfrm4_policy.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-09-12 15:52:44 -07:00
xfrm4_protocol.c xfrm4: Remove duplicate semicolon 2014-06-30 07:49:47 +02:00
xfrm4_state.c inet: make no_pmtu_disc per namespace and kill ipv4_config 2013-12-18 16:58:20 -05:00
xfrm4_tunnel.c sit: add IPv4 over IPv4 support 2013-05-31 17:19:05 -07:00