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Eric Dumazet c5df581389 inet: make sure to grab rcu_read_lock before using ireq->ireq_opt 
[ Upstream commit 2ab2ddd301 ]

Timer handlers do not imply rcu_read_lock(), so my recent fix
triggered a LOCKDEP warning when SYNACK is retransmit.

Lets add rcu_read_lock()/rcu_read_unlock() pairs around ireq->ireq_opt
usages instead of guessing what is done by callers, since it is
not worth the pain.

Get rid of ireq_opt_deref() helper since it hides the logic
without real benefit, since it is now a standard rcu_dereference().

Fixes: 1ad98e9d1b ("tcp/dccp: fix lockdep issue when SYN is backlogged")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2018-10-18 09:16:21 +02:00
..
netfilter netfilter: x_tables: set module owner for icmp(6) matches 2018-08-24 13:09:13 +02:00
Kconfig ip: update policy routing config help 2017-10-12 22:57:11 -07:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
af_inet.c gso_segment: Reset skb->mac_len after modifying network header 2018-09-29 03:06:00 -07:00
ah4.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2017-06-23 14:17:31 -04:00
arp.c arp: fix arp_filter on l3slave devices 2018-04-12 12:32:22 +02:00
cipso_ipv4.c tcp/dccp: fix ireq->opt races 2017-10-21 01:33:19 +01:00
datagram.c
…
devinet.c ipv4: igmp: guard against silly MTU values 2018-01-02 20:31:06 +01:00
esp4.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-09-01 17:42:05 -07:00
esp4_offload.c esp: Fix GRO when the headers not fully in the linear part of the skb. 2018-02-25 11:07:46 +01:00
fib_frontend.c net: ipv4: update fnhe_pmtu when first hop's MTU changes 2018-10-18 09:16:17 +02:00
fib_lookup.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fib_notifier.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fib_rules.c net: fib_rules: Implement notification logic in core 2017-08-03 15:35:59 -07:00
fib_semantics.c net: ipv4: update fnhe_pmtu when first hop's MTU changes 2018-10-18 09:16:17 +02:00
fib_trie.c ipv4: do metrics match when looking up and deleting a route 2017-08-23 20:37:10 -07:00
fou.c net: fix use-after-free in GRO with ESP 2018-07-22 14:28:44 +02:00
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: fix use-after-free in GRO with ESP 2018-07-22 14:28:44 +02:00
icmp.c icmp: don't fail on fragment reassembly time exceeded 2017-12-20 10:10:37 +01:00
igmp.c multicast: do not restore deleted record source filter mode to new one 2018-07-28 07:55:42 +02:00
inet_connection_sock.c inet: make sure to grab rcu_read_lock before using ireq->ireq_opt 2018-10-18 09:16:21 +02:00
inet_diag.c inet_diag: allow protocols to provide additional data 2017-09-01 18:38:09 -07:00
inet_fragment.c ip: process in-order fragments efficiently 2018-09-19 22:43:48 +02:00
inet_hashtables.c net/tcp: Fix socket lookups with SO_BINDTODEVICE 2018-07-22 14:28:46 +02:00
inet_timewait_sock.c soreuseport: initialise timewait reuseport field 2018-05-16 10:10:24 +02:00
inetpeer.c inetpeer: fix uninit-value in inet_getpeer 2018-05-16 10:10:24 +02:00
ip_forward.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ip_fragment.c ip: frags: fix crash in ip_do_fragment() 2018-09-19 22:43:48 +02:00
ip_gre.c erspan: return PACKET_REJECT when the appropriate tunnel is not found 2018-09-26 08:37:58 +02:00
ip_input.c IPv4: early demux can return an error code 2017-10-01 03:55:47 +01:00
ip_options.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ip_output.c ip: hash fragments consistently 2018-07-28 07:55:41 +02:00
ip_sockglue.c ipv4: fix use-after-free in ip_cmsg_recv_dstaddr() 2018-10-18 09:16:17 +02:00
ip_tunnel.c ip_tunnel: be careful when accessing the inner header 2018-10-18 09:16:17 +02:00
ip_tunnel_core.c net: store port/representator id in metadata_dst 2017-06-25 11:42:01 -04:00
ip_vti.c Revert "vti4: Don't override MTU passed on link creation via IFLA_MTU" 2018-05-30 22:32:31 +02:00
ipcomp.c
…
ipconfig.c ipconfig: Correctly initialise ic_nameservers 2018-08-03 07:50:39 +02:00
ipip.c ipip: only increase err_count for some certain type icmp in ipip_err 2017-10-27 23:43:31 +09:00
ipmr.c ipmr: properly check rhltable_init() return value 2018-06-11 22:49:19 +02:00
netfilter.c netfilter: use skb_to_full_sk in ip_route_me_harder 2017-02-28 12:49:36 +01:00
ping.c ipv4: fix memory leaks in udp_sendmsg, ping_v4_sendmsg 2018-05-19 10:20:23 +02:00
proc.c ip: discard IPv4 datagrams with overlapping segments. 2018-09-19 22:43:47 +02:00
protocol.c net: Add sysctl to toggle early demux for tcp and udp 2017-03-24 13:17:07 -07:00
raw.c net: ipv4: fix for a race condition in raw_sendmsg 2018-01-02 20:31:08 +01:00
raw_diag.c net: ipv6: add second dif to raw socket lookups 2017-08-07 11:39:22 -07:00
route.c ipv4: lock mtu in fnhe when received PMTU < net.ipv4.route.min_pmtu 2018-05-30 07:52:14 +02:00
syncookies.c tcp/dccp: fix ireq->opt races 2017-10-21 01:33:19 +01:00
sysctl_net_ipv4.c ipv4: Return EINVAL when ping_group_range sysctl doesn't map to user ns 2018-07-25 11:25:09 +02:00
tcp.c tcp: really ignore MSG_ZEROCOPY if no SO_ZEROCOPY 2018-09-26 08:37:58 +02:00
tcp_bbr.c tcp_bbr: fix bw probing to raise in-flight data for very small BDPs 2018-08-03 07:50:44 +02:00
tcp_bic.c tcp: consolidate congestion control undo functions 2017-08-06 21:25:10 -07:00
tcp_cdg.c tcp: consolidate congestion control undo functions 2017-08-06 21:25:10 -07:00
tcp_cong.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-09-01 17:42:05 -07:00
tcp_cubic.c tcp: consolidate congestion control undo functions 2017-08-06 21:25:10 -07:00
tcp_dctcp.c tcp: remove DELAYED ACK events in DCTCP 2018-08-24 13:09:17 +02:00
tcp_diag.c tcp_diag: report TCP MD5 signing keys and addresses 2017-09-01 18:38:09 -07:00
tcp_fastopen.c net: add rb_to_skb() and other rb tree helpers 2018-09-19 22:43:47 +02:00
tcp_highspeed.c tcp: consolidate congestion control undo functions 2017-08-06 21:25:10 -07:00
tcp_htcp.c tcp: fix cwnd undo in Reno and HTCP congestion controls 2017-08-06 21:25:10 -07:00
tcp_hybla.c tcp: make undo_cwnd mandatory for congestion modules 2016-11-21 13:20:17 -05:00
tcp_illinois.c net/tcp/illinois: replace broken algorithm reference link 2018-05-30 07:52:06 +02:00
tcp_input.c tcp/dccp: fix lockdep issue when SYN is backlogged 2018-10-18 09:16:20 +02:00
tcp_ipv4.c inet: make sure to grab rcu_read_lock before using ireq->ireq_opt 2018-10-18 09:16:21 +02:00
tcp_lp.c tcp: switch TCP TS option (RFC 7323) to 1ms clock 2017-05-17 16:06:01 -04:00
tcp_metrics.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tcp_minisocks.c tcp: do not restart timewait timer on rst reception 2018-09-15 09:45:25 +02:00
tcp_nv.c tcp_nv: fix potential integer overflow in tcpnv_acked 2018-04-26 11:02:13 +02:00
tcp_offload.c gso: validate gso_type in GSO handlers 2018-01-31 14:03:47 +01:00
tcp_output.c tcp: remove DELAYED ACK events in DCTCP 2018-08-24 13:09:17 +02:00
tcp_probe.c tcp: remove redundant argument from tcp_rcv_established() 2017-07-24 17:28:12 -07:00
tcp_rate.c tcp: invalidate rate samples during SACK reneging 2018-01-02 20:31:09 +01:00
tcp_recovery.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tcp_scalable.c tcp: consolidate congestion control undo functions 2017-08-06 21:25:10 -07:00
tcp_timer.c tcp: purge write queue upon aborting the connection 2018-03-31 18:10:38 +02:00
tcp_ulp.c tcp, ulp: add alias for all ulp modules 2018-09-15 09:45:29 +02:00
tcp_vegas.c tcp: fix under-evaluated ssthresh in TCP Vegas 2017-12-25 14:26:30 +01:00
tcp_vegas.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tcp_veno.c tcp: consolidate congestion control undo functions 2017-08-06 21:25:10 -07:00
tcp_westwood.c tcp: Revert "tcp: remove CA_ACK_SLOWPATH" 2017-08-30 11:20:08 -07:00
tcp_yeah.c tcp: consolidate congestion control undo functions 2017-08-06 21:25:10 -07:00
tunnel4.c tunnels: correct conditional build of MPLS and IPv6 2016-07-11 13:27:06 -07:00
udp.c udp: Unbreak modules that rely on external __skb_recv_udp() availability 2018-10-18 09:16:19 +02:00
udp_diag.c udp: fix rx queue len reported by diag and proc interface 2018-06-26 08:06:28 +08:00
udp_impl.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
udp_offload.c net: fix use-after-free in GRO with ESP 2018-07-22 14:28:44 +02:00
udp_tunnel.c net: add infrastructure to un-offload UDP tunnel port 2017-07-24 13:52:59 -07:00
udplite.c udplite: call proper backlog handlers 2016-11-24 15:32:14 -05:00
xfrm4_input.c xfrm: Reinject transport-mode packets through tasklet 2018-03-03 10:24:25 +01:00
xfrm4_mode_beet.c networking: make skb_pull & friends return void pointers 2017-06-16 11:48:39 -04:00
xfrm4_mode_transport.c xfrm: Add encapsulation header offsets while SKB is not encrypted 2017-04-14 10:07:39 +02:00
xfrm4_mode_tunnel.c xfrm: Add encapsulation header offsets while SKB is not encrypted 2017-04-14 10:07:39 +02:00
xfrm4_output.c xfrm: Add an IPsec hardware offloading API 2017-04-14 10:06:10 +02:00
xfrm4_policy.c ipv4: lock mtu in fnhe when received PMTU < net.ipv4.route.min_pmtu 2018-05-30 07:52:14 +02:00
xfrm4_protocol.c xfrm: input: constify xfrm_input_afinfo 2017-02-09 10:22:17 +01:00
xfrm4_state.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
xfrm4_tunnel.c
…