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linux/net/ipv4
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Pengcheng Yang 68fe2b265a tcp: fix "old stuff" D-SACK causing SACK to be treated as D-SACK 
[ Upstream commit c9655008e7 ]

When we receive a D-SACK, where the sequence number satisfies:
	undo_marker <= start_seq < end_seq <= prior_snd_una
we consider this is a valid D-SACK and tcp_is_sackblock_valid()
returns true, then this D-SACK is discarded as "old stuff",
but the variable first_sack_index is not marked as negative
in tcp_sacktag_write_queue().

If this D-SACK also carries a SACK that needs to be processed
(for example, the previous SACK segment was lost), this SACK
will be treated as a D-SACK in the following processing of
tcp_sacktag_write_queue(), which will eventually lead to
incorrect updates of undo_retrans and reordering.

Fixes: fd6dad616d ("[TCP]: Earlier SACK block verification & simplify access to them")
Signed-off-by: Pengcheng Yang <yangpc@wangsu.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-01-12 12:21:48 +01:00
..
bpfilter
Merge tag 'spdx-5.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
2019-05-21 12:33:38 -07:00
netfilter
netfilter: drop bridge nf reset from nf_reset
2019-10-01 18:42:15 +02:00
af_inet.c
net: remove empty inet_exit_net
2019-08-19 18:22:54 -07:00
ah4.c
xfrm: remove type and offload_type map from xfrm_state_afinfo
2019-06-06 08:34:50 +02:00
arp.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
cipso_ipv4.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13
2019-05-21 11:28:45 +02:00
datagram.c
inet: stop leaking jiffies on the wire
2019-11-01 14:57:52 -07:00
devinet.c
inet: protect against too small mtu values.
2019-12-18 16:08:17 +01:00
esp4_offload.c
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next
2019-07-05 15:01:15 -07:00
esp4.c
xfrm: remove get_mtu indirection from xfrm_type
2019-07-01 06:16:40 +02:00
fib_frontend.c
ipv4: fix route update on metric change.
2019-10-26 11:25:53 -07:00
fib_lookup.h
ipv4: Use accessors for fib_info nexthop data
2019-06-04 19:26:49 -07:00
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
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2019-06-07 11:00:14 -07:00
fib_semantics.c
ipv4: Fix table id reference in fib_sync_down_addr
2019-11-07 16:14:36 -08:00
fib_trie.c
net: route dump netlink NLM_F_MULTI flag missing
2019-08-24 16:49:48 -07:00
fou.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
gre_demux.c
gre: refetch erspan header from skb->data after pskb_may_pull()
2019-12-18 16:08:51 +01:00
gre_offload.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
icmp.c
net: icmp: fix data-race in cmp_global_allow()
2020-01-04 19:18:40 +01:00
igmp.c
net: fix __ip_mc_inc_group usage
2019-08-20 12:48:06 -07:00
inet_connection_sock.c
net: add bool confirm_neigh parameter for dst_ops.update_pmtu
2020-01-04 19:18:58 +01:00
inet_diag.c
tcp/dccp: fix possible race __inet_lookup_established()
2020-01-04 19:19:13 +01:00
inet_fragment.c
inet: frags: re-introduce skb coalescing for local delivery
2019-08-08 15:55:10 -07:00
inet_hashtables.c
tcp/dccp: fix possible race __inet_lookup_established()
2020-01-04 19:19:13 +01:00
inet_timewait_sock.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
inetpeer.c
inetpeer: fix data-race in inet_putpeer / inet_putpeer
2020-01-04 19:18:39 +01:00
ip_forward.c
ipv4: Revert removal of rt_uses_gateway
2019-09-20 18:23:33 -07:00
ip_fragment.c
inet: frags: re-introduce skb coalescing for local delivery
2019-08-08 15:55:10 -07:00
ip_gre.c
erspan: fix the tun_info options_len check for erspan
2019-10-29 17:36:42 -07:00
ip_input.c
netfilter: drop bridge nf reset from nf_reset
2019-10-01 18:42:15 +02:00
ip_options.c
netfilter: nf_tables: add support for matching IPv4 options
2019-06-21 18:35:51 +02:00
ip_output.c
inet: protect against too small mtu values.
2019-12-18 16:08:17 +01:00
ip_sockglue.c
ip_sockglue: Fix missing-check bug in ip_ra_control()
2019-05-25 11:00:50 -07:00
ip_tunnel_core.c
ip_tunnel: allow not to count pkts on tstats by setting skb's dev to NULL
2019-06-18 20:48:45 -04:00
ip_tunnel.c
tunnel: do not confirm neighbor when do pmtu update
2020-01-04 19:19:02 +01:00
ip_vti.c
vti: do not confirm neighbor when do pmtu update
2020-01-04 19:19:03 +01:00
ipcomp.c
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next
2019-07-05 15:01:15 -07:00
ipconfig.c
ipconfig: add carrier_timeout kernel parameter
2019-02-01 15:24:13 -08:00
ipip.c
ipip: validate header length in ipip_tunnel_xmit
2019-07-25 17:23:40 -07:00
ipmr_base.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2019-05-07 17:22:09 -07:00
ipmr.c
ipmr: Fix skb headroom in ipmr_get_route().
2019-11-16 13:06:54 -08:00
Kconfig
net: Fix Kconfig indentation
2019-09-26 08:56:17 +02:00
Makefile
net: Initial nexthop code
2019-05-28 21:37:30 -07:00
metrics.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
netfilter.c
netfilter: ipv4: remove useless export_symbol
2019-01-28 11:32:58 +01:00
netlink.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
nexthop.c
nexthops: remove redundant assignment to variable err
2019-08-22 12:14:05 -07:00
ping.c
ip: support SO_MARK cmsg
2019-09-13 21:44:19 +02:00
proc.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2019-06-17 20:20:36 -07:00
protocol.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
raw_diag.c
net: don't warn in inet diag when IPV6 is disabled
2019-07-03 11:26:35 -07:00
raw.c
netfilter: drop bridge nf reset from nf_reset
2019-10-01 18:42:15 +02:00
route.c
net: add bool confirm_neigh parameter for dst_ops.update_pmtu
2020-01-04 19:18:58 +01:00
syncookies.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
sysctl_net_ipv4.c
net/ipv4: fix sysctl max for fib_multipath_hash_policy
2019-11-18 17:25:36 -08:00
tcp_bbr.c
net: annotate lockless accesses to sk->sk_pacing_shift
2020-01-09 10:20:07 +01:00
tcp_bic.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_bpf.c
net: skmsg: fix TLS 1.3 crash with full sk_msg
2019-12-04 22:31:01 +01:00
tcp_cdg.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_cong.c
tcp: fix tcp_set_congestion_control() use from bpf hook
2019-07-18 20:33:48 -07:00
tcp_cubic.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_dctcp.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
tcp_dctcp.h
tcp: refactor DCTCP ECN ACK handling
2018-10-10 22:26:00 -07:00
tcp_diag.c
tcp: annotate tp->write_seq lockless reads
2019-10-13 10:13:08 -07:00
tcp_fastopen.c
tcp: add rcu protection around tp->fastopen_rsk
2019-10-13 10:13:08 -07:00
tcp_highspeed.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_htcp.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_hybla.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_illinois.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_input.c
tcp: fix "old stuff" D-SACK causing SACK to be treated as D-SACK
2020-01-12 12:21:48 +01:00
tcp_ipv4.c
tcp/dccp: fix possible race __inet_lookup_established()
2020-01-04 19:19:13 +01:00
tcp_lp.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_metrics.c
tcp: refactor setting the initial congestion window
2019-05-01 11:47:54 -04:00
tcp_minisocks.c
tcp: annotate tp->snd_nxt lockless reads
2019-10-13 10:13:08 -07:00
tcp_nv.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_offload.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
tcp_output.c
net: annotate lockless accesses to sk->sk_pacing_shift
2020-01-09 10:20:07 +01:00
tcp_rate.c
treewide: Add SPDX license identifier for missed files
2019-05-21 10:50:45 +02:00
tcp_recovery.c
tcp: introduce tcp_skb_timestamp_us() helper
2018-09-21 19:37:59 -07:00
tcp_scalable.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_timer.c
tcp: add rcu protection around tp->fastopen_rsk
2019-10-13 10:13:08 -07:00
tcp_ulp.c
bpf: sockmap/tls, close can race with map free
2019-07-22 16:04:17 +02:00
tcp_vegas.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
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
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_westwood.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp_yeah.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
tcp.c
tcp: fix data-race in tcp_recvmsg()
2020-01-09 10:19:54 +01:00
tunnel4.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
udp_diag.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
udp_impl.h
udp: add missing rehash callback to udplite
2019-01-17 15:01:08 -08:00
udp_offload.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2019-06-22 08:59:24 -04:00
udp_tunnel.c
treewide: Add SPDX license identifier for more missed files
2019-05-21 10:50:45 +02:00
udp.c
udp: fix integer overflow while computing available space in sk_rcvbuf
2020-01-04 19:18:49 +01:00
udplite.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
xfrm4_input.c
xfrm: reset transport header back to network header after all input transforms ahave been applied
2018-09-04 10:26:30 +02:00
xfrm4_output.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
xfrm4_policy.c
net: add bool confirm_neigh parameter for dst_ops.update_pmtu
2020-01-04 19:18:58 +01:00
xfrm4_protocol.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152
2019-05-30 11:26:32 -07:00
xfrm4_state.c
xfrm: remove eth_proto value from xfrm_state_afinfo
2019-06-06 08:34:50 +02:00
xfrm4_tunnel.c
xfrm: remove type and offload_type map from xfrm_state_afinfo
2019-06-06 08:34:50 +02:00