This is a note to let you know that I've just added the patch titled
tipc: call tipc_wait_for_connect only when dlen is not 0
to the 5.13-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
tipc-call-tipc_wait_for_connect-only-when-dlen-is-not-0.patch
and it can be found in the queue-5.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7387a72c5f84f0dfb57618f9e4770672c0d2e4c9 Mon Sep 17 00:00:00 2001
From: Xin Long <lucien.xin@xxxxxxxxx>
Date: Sun, 15 Aug 2021 03:13:36 -0400
Subject: tipc: call tipc_wait_for_connect only when dlen is not 0
From: Xin Long <lucien.xin@xxxxxxxxx>
commit 7387a72c5f84f0dfb57618f9e4770672c0d2e4c9 upstream.
__tipc_sendmsg() is called to send SYN packet by either tipc_sendmsg()
or tipc_connect(). The difference is in tipc_connect(), it will call
tipc_wait_for_connect() after __tipc_sendmsg() to wait until connecting
is done. So there's no need to wait in __tipc_sendmsg() for this case.
This patch is to fix it by calling tipc_wait_for_connect() only when dlen
is not 0 in __tipc_sendmsg(), which means it's called by tipc_connect().
Note this also fixes the failure in tipcutils/test/ptts/:
# ./tipcTS &
# ./tipcTC 9
(hang)
Fixes: 36239dab6da7 ("tipc: fix implicit-connect for SYN+")
Reported-by: Shuang Li <shuali@xxxxxxxxxx>
Signed-off-by: Xin Long <lucien.xin@xxxxxxxxx>
Acked-by: Jon Maloy <jmaloy@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/tipc/socket.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -1528,7 +1528,7 @@ static int __tipc_sendmsg(struct socket
if (unlikely(syn && !rc)) {
tipc_set_sk_state(sk, TIPC_CONNECTING);
- if (timeout) {
+ if (dlen && timeout) {
timeout = msecs_to_jiffies(timeout);
tipc_wait_for_connect(sock, &timeout);
}
Patches currently in stable-queue which might be from lucien.xin@xxxxxxxxx are
queue-5.13/tipc-call-tipc_wait_for_connect-only-when-dlen-is-not-0.patch
