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tipc: set ub->ifindex for local ipv6 address

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Without ub->ifindex set for ipv6 address in tipc_udp_enable(),
ipv6_sock_mc_join() may make the wrong dev join the multicast
address in enable_mcast(). This causes that tipc links would
never be created.

So fix it by getting the right netdev and setting ub->ifindex,
as it does for ipv4 address.

Reported-by: Shuang Li <shuali@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xin Long 2020-08-03 23:34:47 +08:00 committed by David S. Miller
parent 81f6cb3122
commit 5a6f6f5791
1 changed files with 8 additions and 0 deletions
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8
net/tipc/udp_media.c
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@ -738,6 +738,13 @@ static int tipc_udp_enable(struct net *net, struct tipc_bearer *b,
b->mtu = b->media->mtu;
#if IS_ENABLED(CONFIG_IPV6)
} else if (local.proto == htons(ETH_P_IPV6)) {
struct net_device *dev;
dev = ipv6_dev_find(net, &local.ipv6);
if (!dev) {
err = -ENODEV;
goto err;
}
udp_conf.family = AF_INET6;
udp_conf.use_udp6_tx_checksums = true;
udp_conf.use_udp6_rx_checksums = true;
@ -745,6 +752,7 @@ static int tipc_udp_enable(struct net *net, struct tipc_bearer *b,
udp_conf.local_ip6 = in6addr_any;
else
udp_conf.local_ip6 = local.ipv6;
ub->ifindex = dev->ifindex;
b->mtu = 1280;
#endif
} else {