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linux/net/ipv4
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Xin Long daa11cc841 ipv4: not do cache for local delivery if bc_forwarding is enabled 
[ Upstream commit 0a90478b93 ]

With the topo:

    h1 ---| rp1            |
          |     route  rp3 |--- h3 (192.168.200.1)
    h2 ---| rp2            |

If rp1 bc_forwarding is set while rp2 bc_forwarding is not, after
doing "ping 192.168.200.255" on h1, then ping 192.168.200.255 on
h2, and the packets can still be forwared.

This issue was caused by the input route cache. It should only do
the cache for either bc forwarding or local delivery. Otherwise,
local delivery can use the route cache for bc forwarding of other
interfaces.

This patch is to fix it by not doing cache for local delivery if
all.bc_forwarding is enabled.

Note that we don't fix it by checking route cache local flag after
rt_cache_valid() in "local_input:" and "ip_mkroute_input", as the
common route code shouldn't be touched for bc_forwarding.

Fixes: 5cbf777cfd ("route: add support for directed broadcast forwarding")
Reported-by: Jianlin Shi <jishi@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-11 12:20:47 +02:00
..
bpfilter
bpfilter: remove trailing newline
2018-07-24 14:10:42 -07:00
netfilter
netfilter: ipt_CLUSTERIP: fix warning unused variable cn
2019-03-23 20:09:57 +01:00
af_inet.c
gso_segment: Reset skb->mac_len after modifying network header
2018-09-13 12:09:32 -07:00
ah4.c
net: use -ENOSPC for transient busy indication
2017-11-03 22:11:17 +08:00
arp.c
proc: introduce proc_create_net{,_data}
2018-05-16 07:24:30 +02:00
cipso_ipv4.c
net: avoid use IPCB in cipso_v4_error
2019-03-10 07:17:19 +01:00
datagram.c
…
devinet.c
route: add support for directed broadcast forwarding
2018-07-29 12:37:06 -07:00
esp4_offload.c
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next
2018-07-27 09:33:37 -07:00
esp4.c
esp4: add length check for UDP encapsulation
2019-05-25 18:23:41 +02:00
fib_frontend.c
ipv4: Return error for RTA_VIA attribute
2019-03-10 07:17:19 +01:00
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: add extack support
2018-04-23 10:21:24 -04:00
fib_semantics.c
net: ipv4: update fnhe_pmtu when first hop's MTU changes
2018-10-10 22:44:46 -07:00
fib_trie.c
net: ipv4: Fix memory leak in network namespace dismantle
2019-01-31 08:14:32 +01:00
fou.c
net: fou: do not use guehdr after iptunnel_pull_offloads in gue_udp_recv
2019-04-27 09:36:31 +02:00
gre_demux.c
net: ip_gre: use erspan key field for tunnel lookup
2019-02-06 17:30:06 +01:00
gre_offload.c
Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net
2018-07-03 10:29:26 +09:00
icmp.c
net: Add __icmp_send helper.
2019-03-10 07:17:19 +01:00
igmp.c
ipv4/igmp: fix build error if !CONFIG_IP_MULTICAST
2019-06-04 08:02:31 +02:00
inet_connection_sock.c
inet: make sure to grab rcu_read_lock before using ireq->ireq_opt
2018-10-02 15:52:12 -07:00
inet_diag.c
inet_diag: fix reporting cgroup classid and fallback to priority
2019-02-27 10:08:58 +01:00
inet_fragment.c
net: IP defrag: encapsulate rbtree defrag code into callable functions
2019-04-27 09:36:33 +02:00
inet_hashtables.c
bpf: Enable BPF_PROG_TYPE_SK_REUSEPORT bpf prog in reuseport selection
2018-08-11 01:58:46 +02:00
inet_timewait_sock.c
soreuseport: initialise timewait reuseport field
2018-04-07 22:32:32 -04:00
inetpeer.c
net: ipv4: use a dedicated counter for icmp_v4 redirect packets
2019-02-23 09:07:24 +01:00
ip_forward.c
net: clear skb->tstamp in forwarding paths
2019-01-09 17:38:31 +01:00
ip_fragment.c
net: IP defrag: encapsulate rbtree defrag code into callable functions
2019-04-27 09:36:33 +02:00
ip_gre.c
net: ip_gre: fix possible use-after-free in erspan_rcv
2019-04-17 08:38:43 +02:00
ip_input.c
vrf: check accept_source_route on the original netdevice
2019-04-17 08:38:42 +02:00
ip_options.c
vrf: check accept_source_route on the original netdevice
2019-04-17 08:38:42 +02:00
ip_output.c
ipv4: ip_do_fragment: Preserve skb_iif during fragmentation
2019-05-05 14:42:36 +02:00
ip_sockglue.c
ip: on queued skb use skb_header_pointer instead of pskb_may_pull
2019-01-22 21:40:31 +01:00
ip_tunnel_core.c
ip_tunnel: don't force DF when MTU is locked
2018-11-23 08:17:02 +01:00
ip_tunnel.c
ip: validate header length on virtual device xmit
2019-01-09 17:38:31 +01:00
ip_vti.c
vti4: ipip tunnel deregistration fixes.
2019-05-25 18:23:41 +02:00
ipcomp.c
…
ipconfig.c
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2018-06-06 18:39:49 -07:00
ipip.c
net: Drop pernet_operations::async
2018-03-27 13:18:09 -04:00
ipmr_base.c
net: ipmr: fix unresolved entry dumps
2018-10-17 22:35:42 -07:00
ipmr.c
ipv4: Fix potential Spectre v1 vulnerability
2019-01-09 17:38:31 +01:00
Kconfig
net: remove blank lines at end of file
2018-07-24 14:10:43 -07:00
Makefile
net: remove blank lines at end of file
2018-07-24 14:10:43 -07:00
metrics.c
net: metrics: add proper netlink validation
2018-06-05 12:29:43 -04:00
netfilter.c
netfilter: utils: move nf_ip_checksum* from ipv4 to utils
2018-07-16 17:51:48 +02:00
netlink.c
ipv4: Add ICMPv6 support when parse route ipproto
2019-03-10 07:17:17 +01:00
ping.c
net: add helpers checking if socket can be bound to nonlocal address
2018-08-01 09:50:04 -07:00
proc.c
ip: discard IPv4 datagrams with overlapping segments.
2018-08-05 17:16:46 -07:00
protocol.c
…
raw_diag.c
…
raw.c
ipv4: Fix raw socket lookup for local traffic
2019-05-16 19:41:29 +02:00
route.c
ipv4: not do cache for local delivery if bc_forwarding is enabled
2019-06-11 12:20:47 +02:00
syncookies.c
tcp: handle inet_csk_reqsk_queue_add() failures
2019-03-19 13:12:39 +01:00
sysctl_net_ipv4.c
ipv4: set the tcp_min_rtt_wlen range from 0 to one day
2019-05-02 09:58:59 +02:00
tcp_bbr.c
tcp_bbr: apply PROBE_RTT cwnd cap even if acked==0
2018-08-22 21:45:32 -07:00
tcp_bic.c
…
tcp_cdg.c
tcp: cdg: make struct tcp_cdg static
2017-10-16 21:24:25 +01:00
tcp_cong.c
tcp: Namespace-ify sysctl_tcp_default_congestion_control
2017-11-15 14:09:52 +09:00
tcp_cubic.c
…
tcp_dctcp.c
tcp: Ensure DCTCP reacts to losses
2019-04-17 08:38:41 +02:00
tcp_diag.c
net: sock: replace sk_state_load with inet_sk_state_load and remove sk_state_store
2017-12-20 14:00:25 -05:00
tcp_fastopen.c
tcp: pause Fast Open globally after third consecutive timeout
2017-12-13 15:51:12 -05:00
tcp_highspeed.c
…
tcp_htcp.c
…
tcp_hybla.c
…
tcp_illinois.c
net/tcp/illinois: replace broken algorithm reference link
2018-02-28 12:03:47 -05:00
tcp_input.c
tcp: tcp_grow_window() needs to respect tcp_space()
2019-04-27 09:36:31 +02:00
tcp_ipv4.c
tcp: fix a potential NULL pointer dereference in tcp_sk_exit
2019-04-17 08:38:41 +02:00
tcp_lp.c
…
tcp_metrics.c
net: Drop pernet_operations::async
2018-03-27 13:18:09 -04:00
tcp_minisocks.c
tcp: do not restart timewait timer on rst reception
2018-08-31 23:10:35 -07:00
tcp_nv.c
tcp_nv: fix potential integer overflow in tcpnv_acked
2018-01-31 10:26:30 -05:00
tcp_offload.c
tcp: Don't coalesce decrypted and encrypted SKBs
2018-07-16 00:12:09 -07:00
tcp_output.c
tcp: lack of available data can also cause TSO defer
2018-12-17 09:24:42 +01:00
tcp_rate.c
tcp: expose both send and receive intervals for rate sample
2018-07-11 23:01:56 -07:00
tcp_recovery.c
tcp: add stat of data packet reordering events
2018-08-01 09:56:10 -07:00
tcp_scalable.c
…
tcp_timer.c
tcp: change txhash on SYN-data timeout
2019-01-22 21:40:30 +01:00
tcp_ulp.c
tcp, ulp: fix leftover icsk_ulp_ops preventing sock from reattach
2018-08-16 14:58:08 -07:00
tcp_vegas.c
tcp: fix under-evaluated ssthresh in TCP Vegas
2017-09-29 06:07:00 +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_westwood.c
tcp: Revert "tcp: remove CA_ACK_SLOWPATH"
2017-08-30 11:20:08 -07:00
tcp_yeah.c
…
tcp.c
tcp: do not report TCP_CM_INQ of 0 for closed connections
2019-03-19 13:12:39 +01:00
tunnel4.c
inet: whitespace cleanup
2018-02-28 11:43:28 -05:00
udp_diag.c
udp: fix rx queue len reported by diag and proc interface
2018-06-08 19:55:15 -04:00
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
Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net
2018-07-03 10:29:26 +09:00
udp_tunnel.c
…
udp.c
udp: with udp_segment release on error path
2019-01-31 08:14:33 +01:00
udplite.c
proc: introduce proc_create_net{,_data}
2018-05-16 07:24:30 +02:00
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_mode_beet.c
…
xfrm4_mode_transport.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_mode_tunnel.c
xfrm: Verify MAC header exists before overwriting eth_hdr(skb)->h_proto
2018-03-07 10:54:29 +01:00
xfrm4_output.c
net: xfrm: use skb_gso_validate_network_len() to check gso sizes
2018-03-04 17:49:17 -05:00
xfrm4_policy.c
xfrm4: Fix uninitialized memory read in _decode_session4
2019-05-25 18:23:41 +02:00
xfrm4_protocol.c
…
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
…