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linux/net/ipv6
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Nicolas Dichtel 08b44656c0 gre: add link local route when local addr is any 
This bug was reported by Steinar H. Gunderson and was introduced by commit
f7cb888633 ("sit/gre6: don't try to add the same route two times").

root@morgental:~# ip tunnel add foo mode gre remote 1.2.3.4 ttl 64
root@morgental:~# ip link set foo up mtu 1468
root@morgental:~# ip -6 route show dev foo
fe80::/64  proto kernel  metric 256

but after the above commit, no such route shows up.

There is no link local route because dev->dev_addr is 0 (because local ipv4
address is 0), hence no link local address is configured.

In this scenario, the link local address is added manually: 'ip -6 addr add
fe80::1 dev foo' and because prefix is /128, no link local route is added by the
kernel.

Even if the right things to do is to add the link local address with a /64
prefix, we need to restore the previous behavior to avoid breaking userpace.

Reported-by: Steinar H. Gunderson <sesse@samfundet.no>
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-02-17 14:08:26 -05:00
..
netfilter netfilter: nf_tables: add reject module for NFPROTO_INET 2014-02-06 09:44:18 +01:00
addrconf_core.c
addrconf.c gre: add link local route when local addr is any 2014-02-17 14:08:26 -05:00
addrlabel.c
af_inet6.c ipv6: add flowlabel_consistency sysctl 2014-01-19 17:12:31 -08:00
ah6.c ipv4/ipv6: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00
anycast.c ipv6: enable anycast addresses as source addresses for datagrams 2014-01-22 21:57:05 -08:00
datagram.c ipv6: enable anycast addresses as source addresses for datagrams 2014-01-22 21:57:05 -08:00
esp6.c ipv4/ipv6: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00
exthdrs_core.c
exthdrs_offload.c
exthdrs.c
fib6_rules.c ipv6: move IPV6_TCLASS_SHIFT into ipv6.h and define a helper 2014-01-15 15:53:18 -08:00
icmp.c ipv6: icmp6_send: fix Oops when pinging a not set up IPv6 peer on a sit tunnel 2014-02-09 18:12:40 -08:00
inet6_connection_sock.c net: Remove FLOWI_FLAG_CAN_SLEEP 2013-12-06 07:24:39 +01:00
inet6_hashtables.c
ip6_checksum.c
ip6_fib.c ipv6: remove prune parameter for fib6_clean_all 2014-01-02 03:30:35 -05:00
ip6_flowlabel.c ipv6: add flowlabel_consistency sysctl 2014-01-19 17:12:31 -08:00
ip6_gre.c ipv6: move IPV6_TCLASS_SHIFT into ipv6.h and define a helper 2014-01-15 15:53:18 -08:00
ip6_icmp.c
ip6_input.c net: Fix memory leak if TPROXY used with TCP early demux 2014-01-27 16:22:11 -08:00
ip6_offload.c net-gre-gro: Add GRE support to the GRO stack 2014-01-07 16:21:31 -05:00
ip6_offload.h
ip6_output.c net: ip, ipv6: handle gso skbs in forwarding path 2014-02-13 17:17:02 -05:00
ip6_tunnel.c ipv6: move IPV6_TCLASS_SHIFT into ipv6.h and define a helper 2014-01-15 15:53:18 -08:00
ip6_vti.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-01-14 14:42:42 -08:00
ip6mr.c net: avoid reference counter overflows on fib_rules in multicast forwarding 2014-01-14 17:37:25 -08:00
ipcomp6.c ipv4/ipv6: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00
ipv6_sockglue.c ipv6: make IPV6_RECVPKTINFO work for ipv4 datagrams 2014-01-19 19:53:18 -08:00
Kconfig ipv6: Remove privacy config option. 2013-10-28 20:07:50 -04:00
Makefile
mcast.c ipv6: send Change Status Report after DAD is completed 2014-01-17 18:12:29 -08:00
mip6.c ipv4/ipv6: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00
ndisc.c neigh: use tbl->family to distinguish ipv4 from ipv6 2013-12-09 20:56:12 -05:00
netfilter.c
output_core.c
ping.c ipv6: protect protocols not handling ipv4 from v4 connection/bind attempts 2014-01-21 16:59:19 -08:00
proc.c
protocol.c net: remove outdated comment for ipv4 and ipv6 protocol handler 2013-11-28 18:47:51 -05:00
raw.c ipv6: protect protocols not handling ipv4 from v4 connection/bind attempts 2014-01-21 16:59:19 -08:00
reassembly.c ipv6: split inet6_hash_frag for netfilter and initialize secrets with net_get_random_once 2013-10-23 17:01:40 -04:00
route.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-01-06 17:37:45 -05:00
sit.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2014-01-06 17:37:45 -05:00
syncookies.c net: Remove FLOWI_FLAG_CAN_SLEEP 2013-12-06 07:24:39 +01:00
sysctl_net_ipv6.c ipv6: add flowlabel_consistency sysctl 2014-01-19 17:12:31 -08:00
tcp_ipv6.c tcp: delete redundant calls of tcp_mtup_init() 2014-01-21 16:52:31 -08:00
tcpv6_offload.c net-gro: Prepare GRO stack for the upcoming tunneling support 2013-12-12 13:47:53 -05:00
tunnel6.c ipv4/ipv6: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00
udp_impl.h
udp_offload.c ipv6: fix headroom calculation in udp6_ufo_fragment 2013-11-05 22:09:53 -05:00
udp.c ipv6: make IPV6_RECVPKTINFO work for ipv4 datagrams 2014-01-19 19:53:18 -08:00
udplite.c
xfrm6_input.c
xfrm6_mode_beet.c
xfrm6_mode_ro.c ipv4/ipv6: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00
xfrm6_mode_transport.c
xfrm6_mode_tunnel.c
xfrm6_output.c
xfrm6_policy.c xfrm: Fix null pointer dereference when decoding sessions 2013-11-01 07:08:46 +01:00
xfrm6_state.c
xfrm6_tunnel.c ipv4/ipv6: Fix FSF address in file headers 2013-12-06 12:37:56 -05:00