From: David Ahern <dsahern@xxxxxxxxxx>
[ Upstream commit 874fb9e2ca949b443cc419a4f2227cafd4381d39 ]
Tobias reported regressions in IPsec tests following the patch
referenced by the Fixes tag below. The root cause is dropping the
reset of the flowi4_oif after the fib_lookup. Apparently it is
needed for xfrm cases, so restore the oif update to ip_route_output_flow
right before the call to xfrm_lookup_route.
Fixes: 2fbc6e89b2f1 ("ipv4: Update exception handling for multipath routes via same device")
Reported-by: Tobias Brunner <tobias@xxxxxxxxxxxxxx>
Signed-off-by: David Ahern <dsahern@xxxxxxxxxx>
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/ipv4/route.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -2728,10 +2728,12 @@ struct rtable *ip_route_output_flow(stru
if (IS_ERR(rt))
return rt;
- if (flp4->flowi4_proto)
+ if (flp4->flowi4_proto) {
+ flp4->flowi4_oif = rt->dst.dev->ifindex;
rt = (struct rtable *)xfrm_lookup_route(net, &rt->dst,
flowi4_to_flowi(flp4),
sk, 0);
+ }
return rt;
}
