5.15-stable patches

added patches:
	udp-preserve-the-connected-status-if-only-udp-cmsg.patch

2 files changed, 72 insertions, 0 deletions

diff --git a/queue-5.15/series b/queue-5.15/series
index 22b0bc6df2..f52a023b6d 100644
--- a/queue-5.15/series
+++ b/queue-5.15/series
@@ -76,3 +76,4 @@ i2c-smbus-fix-null-function-pointer-dereference.patch
 fbdev-fix-incorrect-address-computation-in-deferred-io.patch
 hid-i2c-hid-remove-i2c_hid_read_pending-flag-to-prevent-lock-up.patch
 bounds-use-the-right-number-of-bits-for-power-of-two-config_nr_cpus.patch
+udp-preserve-the-connected-status-if-only-udp-cmsg.patch
diff --git a/queue-5.15/udp-preserve-the-connected-status-if-only-udp-cmsg.patch b/queue-5.15/udp-preserve-the-connected-status-if-only-udp-cmsg.patch
new file mode 100644
index 0000000000..57217e0a5c
--- /dev/null
+++ b/queue-5.15/udp-preserve-the-connected-status-if-only-udp-cmsg.patch
@@ -0,0 +1,71 @@
+From 680d11f6e5427b6af1321932286722d24a8b16c1 Mon Sep 17 00:00:00 2001
+From: Yick Xie <yick.xie@gmail.com>
+Date: Fri, 19 Apr 2024 01:06:10 +0800
+Subject: udp: preserve the connected status if only UDP cmsg
+
+From: Yick Xie <yick.xie@gmail.com>
+
+commit 680d11f6e5427b6af1321932286722d24a8b16c1 upstream.
+
+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@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>
+Signed-off-by: Yick Xie <yick.xie@gmail.com>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ net/ipv4/udp.c |    5 +++--
+ net/ipv6/udp.c |    5 +++--
+ 2 files changed, 6 insertions(+), 4 deletions(-)
+
+--- a/net/ipv4/udp.c
++++ b/net/ipv4/udp.c
+@@ -1139,16 +1139,17 @@ int udp_sendmsg(struct sock *sk, struct
+ 
+ 	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;
+--- a/net/ipv6/udp.c
++++ b/net/ipv6/udp.c
+@@ -1479,9 +1479,11 @@ 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;
+@@ -1493,7 +1495,6 @@ do_udp_sendmsg:
+ 		}
+ 		if (!(opt->opt_nflen|opt->opt_flen))
+ 			opt = NULL;
+-		connected = false;
+ 	}
+ 	if (!opt) {
+ 		opt = txopt_get(np);