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| author | Ido Schimmel <idosch@mellanox.com> | 2018-05-02 21:41:56 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-05-02 22:33:02 +0200 |
| commit | 30ca22e4a5d0063dd9a9cdf35cd139c5807cbeb3 (patch) | |
| tree | 062c2d521125bed978582d9f4e6d46987f1ce019 /net | |
| parent | net/smc: restrict non-blocking connect finish (diff) | |
| download | linux-30ca22e4a5d0063dd9a9cdf35cd139c5807cbeb3.tar.xz linux-30ca22e4a5d0063dd9a9cdf35cd139c5807cbeb3.zip | |
ipv6: Revert "ipv6: Allow non-gateway ECMP for IPv6"
This reverts commit edd7ceb78296 ("ipv6: Allow non-gateway ECMP for
IPv6").
Eric reported a division by zero in rt6_multipath_rebalance() which is
caused by above commit that considers identical local routes to be
siblings. The division by zero happens because a nexthop weight is not
set for local routes.
Revert the commit as it does not fix a bug and has side effects.
To reproduce:
# ip -6 address add 2001:db8::1/64 dev dummy0
# ip -6 address add 2001:db8::1/64 dev dummy1
Fixes: edd7ceb78296 ("ipv6: Allow non-gateway ECMP for IPv6")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Tested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv6/ip6_fib.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c index 3c97c29d4401..deab2db6692e 100644 --- a/net/ipv6/ip6_fib.c +++ b/net/ipv6/ip6_fib.c @@ -934,6 +934,9 @@ static int fib6_add_rt2node(struct fib6_node *fn, struct rt6_info *rt, * list. * Only static routes (which don't have flag * RTF_EXPIRES) are used for ECMPv6. + * + * To avoid long list, we only had siblings if the + * route have a gateway. */ if (rt_can_ecmp && rt6_qualify_for_ecmp(iter)) |