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: 2e8de8576343 ("udp: add gso segment cmsg")
Signed-off-by: Yick Xie <yick.xie@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Willem de Bruijn <willemb@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240418170610.867084-1-yick.xie@xxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
(cherry picked from commit 680d11f6e5427b6af1321932286722d24a8b16c1)
Signed-off-by: Yick Xie <yick.xie@xxxxxxxxx>
---
net/ipv4/udp.c | 5 +++--
net/ipv6/udp.c | 5 +++--
2 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 0b7e76e6f202..16ff3962b24d 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1125,16 +1125,17 @@ 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;
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index b5d879f2501d..8c9672e7a7dd 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1453,9 +1453,11 @@ int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
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;
@@ -1467,7 +1469,6 @@ int udpv6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
}
if (!(opt->opt_nflen|opt->opt_flen))
opt = NULL;
- connected = false;
}
if (!opt) {
opt = txopt_get(np);
--
2.34.1
