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linux-stable/net/ipv6
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Paolo Abeni 764d3be6e4 ipv6: bump genid when the IFA_F_TENTATIVE flag is clear 
When an ipv6 address has the tentative flag set, it can't be
used as source for egress traffic, while the associated route,
if any, can be looked up and even stored into some dst_cache.

In the latter scenario, the source ipv6 address selected and
stored in the cache is most probably wrong (e.g. with
link-local scope) and the entity using the dst_cache will
experience lack of ipv6 connectivity until said cache is
cleared or invalidated.

Overall this may cause lack of connectivity over most IPv6 tunnels
(comprising geneve and vxlan), if the first egress packet reaches
the tunnel before the DaD is completed for the used ipv6
address.

This patch bumps a new genid after that the IFA_F_TENTATIVE flag
is cleared, so that dst_cache will be invalidated on
next lookup and ipv6 connectivity restored.

Fixes: 0c1d70af92 ("net: use dst_cache for vxlan device")
Fixes: 468dfffcd7 ("geneve: add dst caching support")
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-11-24 12:04:10 -05:00
..
ila ila: make nla_policy const 2016-09-01 14:09:01 -07:00
netfilter netfilter: nft_dup: do not use sreg_dev if the user doesn't specify it 2016-10-31 13:17:38 +01:00
addrconf.c ipv6: bump genid when the IFA_F_TENTATIVE flag is clear 2016-11-24 12:04:10 -05:00
addrconf_core.c
addrlabel.c
af_inet6.c tcp: Set read_sock and peek_len proto_ops 2016-08-28 23:32:41 -04:00
ah6.c
anycast.c
calipso.c calipso: fix resource leak on calipso_genopt failure 2016-08-13 14:56:17 -07:00
datagram.c sock: propagate __sock_cmsg_send() error 2016-05-16 13:46:23 -04:00
esp6.c
exthdrs.c Merge branch 'stable-4.8' of git://git.infradead.org/users/pcmoore/selinux into next 2016-07-07 10:15:34 +10:00
exthdrs_core.c ipv6: constify the skb pointer of ipv6_find_tlv(). 2016-06-27 15:06:15 -04:00
exthdrs_offload.c
fib6_rules.c net: flow: Add l3mdev flow update 2016-09-10 23:12:51 -07:00
fou6.c fou: add Kconfig options for IPv6 support 2016-05-29 22:24:21 -07:00
icmp.c net: icmp6_send should use dst dev to determine L3 domain 2016-11-07 20:30:19 -05:00
inet6_connection_sock.c
inet6_hashtables.c inet: Fix missing return value in inet6_hash 2016-10-29 12:01:49 -04:00
ip6_checksum.c ipv6: fix checksum annotation in udp6_csum_init 2016-06-14 15:26:42 -04:00
ip6_fib.c ipv6: report NLM_F_CREATE and NLM_F_EXCL flags in RTM_NEWROUTE events 2016-09-09 16:50:23 -07:00
ip6_flowlabel.c ipv6: add new struct ipcm6_cookie 2016-05-03 16:08:14 -04:00
ip6_gre.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-10-02 22:20:41 -04:00
ip6_icmp.c ipv6: icmp: add a force_saddr param to icmp6_send() 2016-06-18 22:11:38 -07:00
ip6_input.c net: vrf: ipv6 support for local traffic to local addresses 2016-06-08 00:25:38 -07:00
ip6_offload.c net: add recursion limit to GRO 2016-10-20 14:32:22 -04:00
ip6_offload.h
ip6_output.c ipv6: Don't use ufo handling on later transformed packets 2016-10-31 13:10:41 -04:00
ip6_tunnel.c ip6_tunnel: disable caching when the traffic class is inherited 2016-11-17 12:08:56 -05:00
ip6_udp_tunnel.c ip6_udp_tunnel: remove unused IPCB related codes 2016-11-02 15:18:36 -04:00
ip6_vti.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-09-23 06:46:57 -04:00
ip6mr.c ipmr, ip6mr: fix scheduling while atomic and a deadlock with ipmr_get_route 2016-09-25 23:41:39 -04:00
ipcomp6.c
ipv6_sockglue.c ipv6: fix a potential deadlock in do_ipv6_setsockopt() 2016-10-21 11:29:02 -04:00
Kconfig fou: fix IPv6 Kconfig options 2016-05-31 14:07:49 -07:00
Makefile Merge branch 'stable-4.8' of git://git.infradead.org/users/pcmoore/selinux into next 2016-07-07 10:15:34 +10:00
mcast.c ipv6: fix a potential deadlock in do_ipv6_setsockopt() 2016-10-21 11:29:02 -04:00
mcast_snoop.c
mip6.c
ndisc.c net: l3mdev: remove redundant calls 2016-09-10 23:12:52 -07:00
netfilter.c
output_core.c net: l3mdev: Add hook to output path 2016-09-10 23:12:52 -07:00
ping.c udp: must lock the socket in udp_disconnect() 2016-10-20 14:45:52 -04:00
proc.c proc: Reduce cache miss in snmp6_seq_show 2016-09-30 01:50:44 -04:00
protocol.c
raw.c udp: must lock the socket in udp_disconnect() 2016-10-20 14:45:52 -04:00
reassembly.c ipv6: do not increment mac header when it's unset 2016-10-23 17:38:58 -04:00
route.c net-ipv6: on device mtu change do not add mtu to mtu-less routes 2016-11-09 13:19:32 -05:00
sit.c sit: make function ipip6_valid_ip_proto() static 2016-08-12 21:52:18 -07:00
syncookies.c net: rename NET_{ADD|INC}_STATS_BH() 2016-04-27 22:48:24 -04:00
sysctl_net_ipv6.c calipso: Add a label cache. 2016-06-27 15:06:17 -04:00
tcp_ipv6.c tcp: take care of truncations done by sk_filter() 2016-11-13 12:30:02 -05:00
tcpv6_offload.c
tunnel6.c
udp.c udp: restore UDPlite many-cast delivery 2016-11-15 22:14:27 -05:00
udp_impl.h ipv6: udp: remove udp_v6_clear_sk() 2016-08-23 23:23:50 -07:00
udp_offload.c gso: Remove arbitrary checks for unsupported GSO 2016-05-20 18:03:15 -04:00
udplite.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-08-30 00:54:02 -04:00
xfrm6_input.c vti6: fix input path 2016-09-21 10:09:14 +02:00
xfrm6_mode_beet.c
xfrm6_mode_ro.c
xfrm6_mode_transport.c
xfrm6_mode_tunnel.c
xfrm6_output.c
xfrm6_policy.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2016-09-12 15:52:44 -07:00
xfrm6_protocol.c
xfrm6_state.c
xfrm6_tunnel.c vti6: fix input path 2016-09-21 10:09:14 +02:00