See attached patch that fixes a missing spinlock in multichannel patch series
--
Thanks,
Steve
From 7a858b6a70320497bb24c493a79f252d7ab3b27c Mon Sep 17 00:00:00 2001
From: Steve French <stfrench@xxxxxxxxxxxxx>
Date: Mon, 15 Nov 2021 18:02:27 -0600
Subject: [PATCH] cifs: protect srv_count with cifs_tcp_ses_lock
Updates to the srv_count field are protected elsewhere
with the cifs_tcp_ses_lock spinlock. Add one missing place
(cifs_get_tcp_sesion).
CC: Shyam Prasad N <sprasad@xxxxxxxxxxxxx>
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
---
fs/cifs/connect.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 82577a7a5bb1..b98711b62897 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1452,8 +1452,10 @@ cifs_get_tcp_session(struct smb3_fs_context *ctx,
tcp_ses->max_in_flight = 0;
tcp_ses->credits = 1;
if (primary_server) {
+ spin_lock(&cifs_tcp_ses_lock);
++primary_server->srv_count;
tcp_ses->primary_server = primary_server;
+ spin_unlock(&cifs_tcp_ses_lock);
}
init_waitqueue_head(&tcp_ses->response_q);
init_waitqueue_head(&tcp_ses->request_q);
--
2.32.0
