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| author | Markus Stenberg <markus.stenberg@iki.fi> | 2015-05-05 13:36:59 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-05-09 15:58:41 -0400 |
| commit | e16e888b525503be05b3aea64190e8b3bdef44d0 (patch) | |
| tree | 7894cd9304ab18668c2d003bfa3e8c8c3a31e41f /net/ipv6/route.c | |
| parent | 0a801445db4cb00bc900fd89b1e5eb7d7b581d7e (diff) | |
| download | blackbird-op-linux-e16e888b525503be05b3aea64190e8b3bdef44d0.tar.gz blackbird-op-linux-e16e888b525503be05b3aea64190e8b3bdef44d0.zip | |
ipv6: Fixed source specific default route handling.
If there are only IPv6 source specific default routes present, the
host gets -ENETUNREACH on e.g. connect() because ip6_dst_lookup_tail
calls ip6_route_output first, and given source address any, it fails,
and ip6_route_get_saddr is never called.
The change is to use the ip6_route_get_saddr, even if the initial
ip6_route_output fails, and then doing ip6_route_output _again_ after
we have appropriate source address available.
Note that this is '99% fix' to the problem; a correct fix would be to
do route lookups only within addrconf.c when picking a source address,
and never call ip6_route_output before source address has been
populated.
Signed-off-by: Markus Stenberg <markus.stenberg@iki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/route.c')
| -rw-r--r-- | net/ipv6/route.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 5c48293ff062..d3588885f097 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -2245,9 +2245,10 @@ int ip6_route_get_saddr(struct net *net, unsigned int prefs, struct in6_addr *saddr) { - struct inet6_dev *idev = ip6_dst_idev((struct dst_entry *)rt); + struct inet6_dev *idev = + rt ? ip6_dst_idev((struct dst_entry *)rt) : NULL; int err = 0; - if (rt->rt6i_prefsrc.plen) + if (rt && rt->rt6i_prefsrc.plen) *saddr = rt->rt6i_prefsrc.addr; else err = ipv6_dev_get_saddr(net, idev ? idev->dev : NULL, |
