[PATCH AUTOSEL 5.2 56/63] vrf: Do not attempt to create IPv6 mcast rule if IPv6 is disabled

Sasha Levin
2019-10-01T16:43:03Z

From: David Ahern <dsahern@gmail.com>

[ Upstream commit dac91170f8e9c73784af5fad6225e954b795601c ]

A user reported that vrf create fails when IPv6 is disabled at boot using
'ipv6.disable=1':
https://bugzilla.kernel.org/show_bug.cgi?id=204903

The failure is adding fib rules at create time. Add RTNL_FAMILY_IP6MR to
the check in vrf_fib_rule if ipv6_mod_enabled is disabled.

Fixes: e4a38c0c4b27 ("ipv6: add vrf table handling code for ipv6 mcast")
Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Patrick Ruddy <pruddy@vyatta.att-mail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/vrf.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/vrf.c b/drivers/net/vrf.c
index 97fb0cb1b97ab..1a22165afb393 100644
--- a/drivers/net/vrf.c
+++ b/drivers/net/vrf.c
@@ -1153,7 +1153,8 @@ static int vrf_fib_rule(const struct net_device *dev, __u8 family, bool add_it)
struct sk_buff *skb;
int err;

- if (family == AF_INET6 && !ipv6_mod_enabled())
+ if ((family == AF_INET6 || family == RTNL_FAMILY_IP6MR) &&
+ !ipv6_mod_enabled())
return 0;

skb = nlmsg_new(vrf_fib_rule_nl_size(), GFP_KERNEL);
--
2.20.1