From: Paulo Alcantara <pc@manguebit.com>
Date: Tue, 14 Mar 2023 20:32:56 -0300
Subject: [PATCH] cifs: use DFS root session instead of tcon ses
Git-commit: 6284e46bdd47743a064fe6ac834a7ac05b1fd206
References: bsc#1193629
Patch-mainline: v6.3-rc3
Use DFS root session whenever possible to get new DFS referrals
otherwise we might end up with an IPC tcon (tcon->ses->tcon_ipc) that
doesn't respond to them. It should be safe accessing
@ses->dfs_root_ses directly in cifs_inval_name_dfs_link_error() as it
has same lifetime as of @tcon.
Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
Cc: stable@vger.kernel.org # 6.2
Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Paulo Alcantara <palcantara@suse.de>
---
fs/cifs/misc.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index 6f9c78650528..b44fb51968bf 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -1262,6 +1262,7 @@ int cifs_inval_name_dfs_link_error(const unsigned int xid,
* removing cached DFS targets that the client would eventually
* need during failover.
*/
+ ses = CIFS_DFS_ROOT_SES(ses);
if (ses->server->ops->get_dfs_refer &&
!ses->server->ops->get_dfs_refer(xid, ses, ref_path, &refs,
&num_refs, cifs_sb->local_nls,
--
2.40.0