From: Aurelien Aptel <aaptel@suse.com>
Date: Thu, 6 Feb 2020 13:49:26 +0100
Subject: [PATCH] cifs: fix channel signing
Git-commit: cc95b6772790c476b2c2de09abec739120593d98
Patch-mainline: v5.6-rc1
References: bsc#1192606

The server var was accidentally used as an iterator over the global
list of connections, thus overwritten the passed argument. This
resulted in the wrong signing key being returned for extra channels.

Fix this by using a separate var to iterate.

Signed-off-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Acked-by: Enzo Matsumiya <ematsumiya@suse.de>
---
 fs/cifs/smb2transport.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c
index fe6acfce3390..08b703b7a15e 100644
--- a/fs/cifs/smb2transport.c
+++ b/fs/cifs/smb2transport.c
@@ -104,13 +104,14 @@ int smb2_get_sign_key(__u64 ses_id, struct TCP_Server_Info *server, u8 *key)
 {
 	struct cifs_chan *chan;
 	struct cifs_ses *ses = NULL;
+	struct TCP_Server_Info *it = NULL;
 	int i;
 	int rc = 0;
 
 	spin_lock(&cifs_tcp_ses_lock);
 
-	list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
-		list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
+	list_for_each_entry(it, &cifs_tcp_ses_list, tcp_ses_list) {
+		list_for_each_entry(ses, &it->smb_ses_list, smb_ses_list) {
 			if (ses->Suid == ses_id)
 				goto found;
 		}
-- 
2.33.1