diff options
| author | Guillaume Nault <gnault@redhat.com> | 2022-01-10 14:43:09 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-01-27 09:19:54 +0100 |
| commit | 91e58091a6bdd59eed8af3a1b16c763da204144d (patch) | |
| tree | 336e0c1f616ffc217127776b7d0e83dda50fd475 /net | |
| parent | 1e06cb37febe0d7df8e10f7e56467ffae67097ab (diff) | |
gre: Don't accidentally set RTO_ONLINK in gre_fill_metadata_dst()
commit f7716b318568b22fbf0e3be99279a979e217cf71 upstream.
Mask the ECN bits before initialising ->flowi4_tos. The tunnel key may
have the last ECN bit set, which will interfere with the route lookup
process as ip_route_output_key_hash() interpretes this bit specially
(to restrict the route scope).
Found by code inspection, compile tested only.
Fixes: 962924fa2b7a ("ip_gre: Refactor collect metatdata mode tunnel xmit to ip_md_tunnel_xmit")
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ipv4/ip_gre.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index c4989e5903e4..f67f1d27f565 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -577,8 +577,9 @@ static int gre_fill_metadata_dst(struct net_device *dev, struct sk_buff *skb) key = &info->key; ip_tunnel_init_flow(&fl4, IPPROTO_GRE, key->u.ipv4.dst, key->u.ipv4.src, - tunnel_id_to_key32(key->tun_id), key->tos, 0, - skb->mark, skb_get_hash(skb)); + tunnel_id_to_key32(key->tun_id), + key->tos & ~INET_ECN_MASK, 0, skb->mark, + skb_get_hash(skb)); rt = ip_route_output_key(dev_net(dev), &fl4); if (IS_ERR(rt)) return PTR_ERR(rt); |