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udp: preserve the connected status if only UDP cmsg 

If "udp_cmsg_send()" returned 0 (i.e. only UDP cmsg),
"connected" should not be set to 0. Otherwise it stops
the connected socket from using the cached route.

Fixes: 2e8de85763 ("udp: add gso segment cmsg")
Signed-off-by: Yick Xie <yick.xie@gmail.com>
Cc: stable@vger.kernel.org
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/20240418170610.867084-1-yick.xie@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Yick Xie 2024-04-19 01:06:10 +08:00 committed by Jakub Kicinski
parent f58f45c1e5
commit 680d11f6e5
2 changed files with 6 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
net/ipv4/udp.c
View File

@ -1123,16 +1123,17 @@ int udp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
if (msg->msg_controllen) {
err = udp_cmsg_send(sk, msg, &ipc.gso_size);
if (err > 0)
if (err > 0) {
err = ip_cmsg_send(sk, msg, &ipc,
sk->sk_family == AF_INET6);
connected = 0;
}
if (unlikely(err < 0)) {
kfree(ipc.opt);
return err;
}
if (ipc.opt)
free = 1;
connected = 0;
}
if (!ipc.opt) {
struct ip_options_rcu *inet_opt;

5
net/ipv6/udp.c
View File

@ -1474,9 +1474,11 @@ do_udp_sendmsg:
ipc6.opt = opt;
err = udp_cmsg_send(sk, msg, &ipc6.gso_size);
if (err > 0)
if (err > 0) {
err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, fl6,
&ipc6);
connected = false;
}
if (err < 0) {
fl6_sock_release(flowlabel);
return err;
@ -1488,7 +1490,6 @@ do_udp_sendmsg:
}
if (!(opt->opt_nflen|opt->opt_flen))
opt = NULL;
connected = false;
}
if (!opt) {
opt = txopt_get(np);