6.1-stable review patch. If anyone has any objections, please let me know.
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From: Ido Schimmel idosch@nvidia.com
[ Upstream commit c2b639f9f3b7a058ca9c7349b096f355773f2cd8 ]
Unmask the upper DSCP bits when initializing an IPv4 flow key via ip_tunnel_init_flow() before passing it to ip_route_output_key() so that in the future we could perform the FIB lookup according to the full DSCP value.
Note that the 'tos' variable includes the full DS field. Either the one specified as part of the tunnel parameters or the one inherited from the inner packet.
Signed-off-by: Ido Schimmel idosch@nvidia.com Reviewed-by: Guillaume Nault gnault@redhat.com Signed-off-by: David S. Miller davem@davemloft.net Stable-dep-of: b5a7b661a073 ("net: Fix netns for ip_tunnel_init_flow()") Signed-off-by: Sasha Levin sashal@kernel.org --- net/ipv4/ip_tunnel.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c index eb74e33ffb64..4f30ccf2d321 100644 --- a/net/ipv4/ip_tunnel.c +++ b/net/ipv4/ip_tunnel.c @@ -773,7 +773,7 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct net_device *dev, }
ip_tunnel_init_flow(&fl4, protocol, dst, tnl_params->saddr, - tunnel->parms.o_key, RT_TOS(tos), + tunnel->parms.o_key, tos & INET_DSCP_MASK, dev_net(dev), READ_ONCE(tunnel->parms.link), tunnel->fwmark, skb_get_hash(skb), 0);