diff options
| author | David Ahern <dsa@cumulusnetworks.com> | 2016-01-04 18:09:27 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-01-05 04:58:30 +0100 |
| commit | b5bdacf3bb027ba0af4d61b38ec289bfc8b64372 (patch) | |
| tree | 1346f43639075874a2c82c5d67dad70a3b95e493 /net/ipv4/udp.c | |
| parent | r8152: add reset_resume function (diff) | |
| download | linux-b5bdacf3bb027ba0af4d61b38ec289bfc8b64372.tar.xz linux-b5bdacf3bb027ba0af4d61b38ec289bfc8b64372.zip | |
net: Propagate lookup failure in l3mdev_get_saddr to caller
Commands run in a vrf context are not failing as expected on a route lookup:
root@kenny:~# ip ro ls table vrf-red
unreachable default
root@kenny:~# ping -I vrf-red -c1 -w1 10.100.1.254
ping: Warning: source address might be selected on device other than vrf-red.
PING 10.100.1.254 (10.100.1.254) from 0.0.0.0 vrf-red: 56(84) bytes of data.
--- 10.100.1.254 ping statistics ---
2 packets transmitted, 0 received, 100% packet loss, time 999ms
Since the vrf table does not have a route for 10.100.1.254 the ping
should have failed. The saddr lookup causes a full VRF table lookup.
Propogating a lookup failure to the user allows the command to fail as
expected:
root@kenny:~# ping -I vrf-red -c1 -w1 10.100.1.254
connect: No route to host
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | net/ipv4/udp.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 0c7b0e61b917..c43890848641 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -1025,8 +1025,11 @@ int udp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) flow_flags, faddr, saddr, dport, inet->inet_sport); - if (!saddr && ipc.oif) - l3mdev_get_saddr(net, ipc.oif, fl4); + if (!saddr && ipc.oif) { + err = l3mdev_get_saddr(net, ipc.oif, fl4); + if (err < 0) + goto out; + } security_sk_classify_flow(sk, flowi4_to_flowi(fl4)); rt = ip_route_output_flow(net, fl4, sk); |