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linux/net/ipv6
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Eric Dumazet 04c494e68a Revert "tcp/dccp: get rid of inet_twsk_purge()" 
This reverts commits:

0dad4087a8 ("tcp/dccp: get rid of inet_twsk_purge()")
d507204d3c ("tcp/dccp: add tw->tw_bslot")

As Leonard pointed out, a newly allocated netns can happen
to reuse a freed 'struct net'.

While TCP TW timers were covered by my patches, other things were not:

1) Lookups in rx path (INET_MATCH() and INET6_MATCH()), as they look
  at 4-tuple plus the 'struct net' pointer.

2) /proc/net/tcp[6] and inet_diag, same reason.

3) hashinfo->bhash[], same reason.

Fixing all this seems risky, lets instead revert.

In the future, we might have a per netns tcp hash table, or
a per netns list of timewait sockets...

Fixes: 0dad4087a8 ("tcp/dccp: get rid of inet_twsk_purge()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Leonard Crestez <cdleonard@gmail.com>
Tested-by: Leonard Crestez <cdleonard@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2022-05-13 12:24:12 +01:00
..
ila net: ipv6: check return value of rhashtable_init 2021-09-28 12:59:24 +01:00
netfilter netfilter: nft_fib: add reduce support 2022-03-20 00:29:47 +01:00
addrconf_core.c ipv6: add net device refcount tracker to struct inet6_dev 2021-12-06 16:05:11 -08:00
addrconf.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-03-03 11:55:12 -08:00
addrlabel.c ipv6: addrlabel: fix possible memory leak in ip6addrlbl_net_init 2020-11-25 11:20:16 -08:00
af_inet6.c ipv6: annotate some data-races around sk->sk_prot 2022-02-18 11:53:28 +00:00
ah6.c ipv6: ah6: use swap() to make code cleaner 2021-11-18 12:00:15 +00:00
anycast.c
calipso.c cipso,calipso: resolve a number of problems with the DOI refcounts 2021-03-04 15:26:57 -08:00
datagram.c lsm,selinux: pass flowi_common instead of flowi to the LSM hooks 2020-11-23 18:36:21 -05:00
esp6_offload.c net: Fix esp GSO on inter address family tunnels. 2022-03-07 13:14:04 +01:00
esp6.c esp: limit skb_page_frag_refill use to a single page 2022-04-13 10:16:11 +02:00
exthdrs_core.c
exthdrs_offload.c
exthdrs.c ipv6: partially inline ipv6_fixup_options 2022-01-27 19:46:11 -08:00
fib6_notifier.c
fib6_rules.c ipv6: change fib6_rules_net_exit() to batch mode 2022-02-08 20:41:34 -08:00
fou6.c
icmp.c ipv6: do not use per netns icmp sockets 2022-01-25 11:25:21 +00:00
inet6_connection_sock.c lsm,selinux: pass flowi_common instead of flowi to the LSM hooks 2020-11-23 18:36:21 -05:00
inet6_hashtables.c secure_seq: use the 64 bits of the siphash for port offset calculation 2022-05-04 19:22:20 -07:00
ioam6_iptunnel.c ipv6: ioam: Insertion frequency in lwtunnel output 2022-02-04 20:24:45 -08:00
ioam6.c net: ipv6: Get rcv timestamp if needed when handling hop-by-hop IOAM option 2022-03-03 14:38:48 +00:00
ip6_checksum.c
ip6_fib.c ipv6: annotate accesses to fn->fn_sernum 2022-01-20 20:18:37 -08:00
ip6_flowlabel.c ipv6: per-netns exclusive flowlabel checks 2022-02-16 20:37:47 -08:00
ip6_gre.c ip_gre, ip6_gre: Fix race condition on o_seqno in collect_md mode 2022-04-25 11:40:45 +01:00
ip6_icmp.c net: icmp: pass zeroed opts from icmp{,v6}_ndo_send before sending 2021-02-23 11:29:52 -08:00
ip6_input.c net: Postpone skb_clear_delivery_time() until knowing the skb is delivered locally 2022-03-03 14:38:48 +00:00
ip6_offload.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-02-24 17:54:25 -08:00
ip6_offload.h
ip6_output.c ipv6: fix panic when forwarding a pkt with no in6 dev 2022-04-11 12:28:43 +01:00
ip6_tunnel.c ip6_tunnel: fix possible NULL deref in ip6_tnl_xmit 2022-02-09 11:56:19 +00:00
ip6_udp_tunnel.c
ip6_vti.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2021-12-30 12:12:12 -08:00
ip6mr.c net: ipv6mr: fix unused variable warning with CONFIG_IPV6_PIMSM_V2=n 2022-04-06 15:14:30 +01:00
ipcomp6.c xfrm: remove hdr_offset indirection 2021-06-11 14:48:50 +02:00
ipv6_sockglue.c ipv6: annotate some data-races around sk->sk_prot 2022-02-18 11:53:28 +00:00
Kconfig ipv6: ioam: Add support for the ip6ip6 encapsulation 2021-10-04 12:53:35 +01:00
Makefile net: ipv6: use ipv6-y directly instead of ipv6-objs 2021-09-28 13:13:40 +01:00
mcast_snoop.c net: bridge: mcast: fix broken length + header check for MRDv6 Adv. 2021-04-27 14:02:06 -07:00
mcast.c mld: respect RCU rules in ip6_mc_source() and ip6_mc_msfilter() 2022-04-30 15:19:08 +01:00
mip6.c xfrm: ipv6: move mip6_rthdr_offset into xfrm core 2021-06-11 14:48:50 +02:00
ndisc.c ipv6: separate ndisc_ns_create() from ndisc_send_ns() 2022-02-21 12:13:45 +00:00
netfilter.c netfilter: Update ip6_route_me_harder to consider L3 domain 2022-04-25 11:09:20 +02:00
output_core.c ipv6: use prandom_u32() for ID generation 2021-05-31 22:12:08 -07:00
ping.c net: ping6: support setting basic SOL_IPV6 options via cmsg 2022-02-17 14:22:09 +00:00
proc.c net: udp: introduce UDP_MIB_MEMERRORS for udp_mem 2020-11-09 15:34:44 -08:00
protocol.c
raw.c ipv6: raw: check passed optlen before reading 2021-12-29 12:32:56 -08:00
reassembly.c net: ipv6: Handle delivery_time in ipv6 defrag 2022-03-03 14:38:48 +00:00
route.c ipv6: make ip6_rt_gc_expire an atomic_t 2022-04-15 14:28:50 -07:00
rpl_iptunnel.c net: ipv6: rpl_iptunnel: simplify the return expression of rpl_do_srh() 2020-12-08 16:22:54 -08:00
rpl.c net: ipv6: rpl*: Fix strange kerneldoc warnings due to bad header 2020-10-30 12:12:52 -07:00
seg6_hmac.c net: ipv6: check return value of rhashtable_init 2021-09-28 12:59:24 +01:00
seg6_iptunnel.c seg6: fix the iif in the IPv6 socket control block 2021-12-09 07:55:42 -08:00
seg6_local.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 2022-01-05 14:36:10 -08:00
seg6.c icmp: ICMPV6: Examine invoking packet for Segment Route Headers. 2022-01-04 12:17:35 +00:00
sit.c sit: allow encapsulated IPv6 traffic to be delivered locally 2022-01-12 13:56:07 -08:00
syncookies.c tcp: make sure treq->af_specific is initialized 2022-04-25 12:10:11 +01:00
sysctl_net_ipv6.c ipv6: ioam: Data plane support for Pre-allocated Trace 2021-07-21 08:14:33 -07:00
tcp_ipv6.c Revert "tcp/dccp: get rid of inet_twsk_purge()" 2022-05-13 12:24:12 +01:00
tcpv6_offload.c net: move gro definitions to include/net/gro.h 2021-11-16 13:16:54 +00:00
tunnel6.c
udp_impl.h
udp_offload.c gro: remove rcu_read_lock/rcu_read_unlock from gro_receive handlers 2021-11-24 17:21:42 -08:00
udp.c ipv6: Add reasons for skb drops to __udp6_lib_rcv 2022-02-14 11:24:39 +00:00
udplite.c
xfrm6_input.c
xfrm6_output.c xfrm: fix tunnel model fragmentation behavior 2022-03-01 12:08:40 +01:00
xfrm6_policy.c net: Add l3mdev index to flow struct and avoid oif reset for port devices 2022-03-15 20:20:02 -07:00
xfrm6_protocol.c
xfrm6_state.c
xfrm6_tunnel.c xfrm: remove description from xfrm_type struct 2021-06-09 09:38:52 +02:00