Re: [PATCH net-next v11 08/23] ovpn: implement basic TX path (UDP)

2024-10-29, 11:47:21 +0100, Antonio Quartulli wrote:

+static int ovpn_udp4_output(struct ovpn_struct *ovpn, struct ovpn_bind *bind,

• 	    struct dst_cache *cache, struct sock *sk,
  

• 	    struct sk_buff *skb)
  

+{

[...]

• if (unlikely(!inet_confirm_addr(sock_net(sk), NULL, 0, fl.saddr,

• 			RT_SCOPE_HOST))) {
  

• /* we may end up here when the cached address is not usable
  

•  * anymore. In this case we reset address/cache and perform a
  

•  * new look up
  

•  */
  

• fl.saddr = 0;
  

• bind->local.ipv4.s_addr = 0;
  

Here we're updating bind->local without holding peer->lock, that's inconsistent with ovpn_peer_update_local_endpoint.

+static int ovpn_udp6_output(struct ovpn_struct *ovpn, struct ovpn_bind *bind,

• 	    struct dst_cache *cache, struct sock *sk,
  

• 	    struct sk_buff *skb)
  

+{

[...]

• if (unlikely(!ipv6_chk_addr(sock_net(sk), &fl.saddr, NULL, 0))) {

• /* we may end up here when the cached address is not usable
  

•  * anymore. In this case we reset address/cache and perform a
  

•  * new look up
  

•  */
  

• fl.saddr = in6addr_any;
  

• bind->local.ipv6 = in6addr_any;
  

And here as well.