xfrm: update flowi saddr in icmp_send if unset

otherwise xfrm_lookup will fail to find correct policy

Signed-off-by: Ulrich Weber <uweber@astaro.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 0 deletions

diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 96bc7f9475a3..e5d1a44bcbdf 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -569,6 +569,9 @@ void icmp_send(struct sk_buff *skb_in, int type, int code, __be32 info)
                 /* No need to clone since we're just using its address. */
                 rt2 = rt;
 
+                if (!fl.nl_u.ip4_u.saddr)
+                        fl.nl_u.ip4_u.saddr = rt->rt_src;
+
                 err = xfrm_lookup(net, (struct dst_entry **)&rt, &fl, NULL, 0);
                 switch (err) {
                 case 0: