diff -drupN a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
--- a/net/ipv6/ip6_tunnel.c	2018-08-06 17:23:04.000000000 +0300
+++ b/net/ipv6/ip6_tunnel.c	2022-06-12 05:28:14.000000000 +0300
@@ -1273,6 +1273,8 @@ ip4ip6_tnl_xmit(struct sk_buff *skb, str
 			fl6.flowi6_mark = skb->mark;
 	}
 
+	fl6.flowi6_uid = sock_net_uid(dev_net(dev), NULL);
+
 	if (iptunnel_handle_offloads(skb, SKB_GSO_IPXIP6))
 		return -1;
 
@@ -1356,6 +1358,8 @@ ip6ip6_tnl_xmit(struct sk_buff *skb, str
 			fl6.flowi6_mark = skb->mark;
 	}
 
+	fl6.flowi6_uid = sock_net_uid(dev_net(dev), NULL);
+
 	if (iptunnel_handle_offloads(skb, SKB_GSO_IPXIP6))
 		return -1;