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authorDavid Ahern <dsahern@gmail.com>2019-02-26 20:00:02 +0300
committerDavid S. Miller <davem@davemloft.net>2019-02-27 00:23:17 +0300
commitb6e9e5df4ecf100f6a10ab2ade8e46d47a4b9779 (patch)
tree8e7408d68e9a7d2b48a800c07864ba6e299a7ac1 /net
parent3da1ed7ac398f34fff1694017a07054d69c5f5c5 (diff)
downloadlinux-b6e9e5df4ecf100f6a10ab2ade8e46d47a4b9779.tar.xz
ipv4: Return error for RTA_VIA attribute
IPv4 currently does not support nexthops outside of the AF_INET family. Specifically, it does not handle RTA_VIA attribute. If it is passed in a route add request, the actual route added only uses the device which is clearly not what the user intended: $ ip ro add 172.16.1.0/24 via inet6 2001:db8:1::1 dev eth0 $ ip ro ls ... 172.16.1.0/24 dev eth0 Catch this and fail the route add: $ ip ro add 172.16.1.0/24 via inet6 2001:db8:1::1 dev eth0 Error: IPv4 does not support RTA_VIA attribute. Fixes: 03c0566542f4c ("mpls: Netlink commands to add, remove, and dump routes") Signed-off-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/ipv4/fib_frontend.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/ipv4/fib_frontend.c b/net/ipv4/fib_frontend.c
index fe4f6a624238..ed14ec245584 100644
--- a/net/ipv4/fib_frontend.c
+++ b/net/ipv4/fib_frontend.c
@@ -710,6 +710,10 @@ static int rtm_to_fib_config(struct net *net, struct sk_buff *skb,
case RTA_GATEWAY:
cfg->fc_gw = nla_get_be32(attr);
break;
+ case RTA_VIA:
+ NL_SET_ERR_MSG(extack, "IPv4 does not support RTA_VIA attribute");
+ err = -EINVAL;
+ goto errout;
case RTA_PRIORITY:
cfg->fc_priority = nla_get_u32(attr);
break;