path: root/net/ipv6/ip6_output.c
diff options
authorPhil Sutter <>2015-07-15 21:56:26 +0200
committerDavid S. Miller <>2015-07-20 12:59:32 -0700
commita0a9f33bdf8bf9061c31faab46d8eb46ff644622 (patch)
treeefcf1e177085ba336c29320c099fcb046de5b245 /net/ipv6/ip6_output.c
parent22f94e625635fb8555f5e7361745ea780a3853e4 (diff)
net/ipv6: update flowi6_oif in ip6_dst_lookup_flow if not set
Newly created flows don't have flowi6_oif set (at least if the associated socket is not interface-bound). This leads to a mismatch in __xfrm6_selector_match() for policies which specify an interface in the selector (sel->ifindex != 0). Backtracing shows this happens in code-paths originating from e.g. ip6_datagram_connect(), rawv6_sendmsg() or tcp_v6_connect(). (UDP was not tested for.) In summary, this patch fixes policy matching on outgoing interface for locally generated packets. Signed-off-by: Phil Sutter <> Signed-off-by: David S. Miller <>
Diffstat (limited to 'net/ipv6/ip6_output.c')
1 files changed, 2 insertions, 0 deletions
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index d5f7716662db..c5fc85286ef6 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -1023,6 +1023,8 @@ struct dst_entry *ip6_dst_lookup_flow(struct sock *sk, struct flowi6 *fl6,
return ERR_PTR(err);
if (final_dst)
fl6->daddr = *final_dst;
+ if (!fl6->flowi6_oif)
+ fl6->flowi6_oif = dst->dev->ifindex;
return xfrm_lookup_route(sock_net(sk), dst, flowi6_to_flowi(fl6), sk, 0);