From: Paulo Alcantara <pc@cjr.nz>

Date: Thu, 2 Dec 2021 15:29:35 -0300

Subject: [PATCH] cifs: fix missed refcounting of ipc tcon

Git-commit: 65de262a209da0951eb9bc60b3b7faf3bbffa38a

References: bsc#1193629

Patch-mainline: v5.16-rc4

Fix missed refcounting of IPC tcon used for getting domain-based DFS

root referrals.  We want to keep it alive as long as mount is active

and can be refreshed.  For standalone DFS root referrals it wouldn't

be a problem as the client ends up having an IPC tcon for both mount

and cache.

Fixes: c88f7dcd6d64 ("cifs: support nested dfs links over reconnect")

Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>

Reviewed-by: Enzo Matsumiya <ematsumiya@suse.de>

Signed-off-by: Steve French <stfrench@microsoft.com>

Acked-by: Enzo Matsumiya <ematsumiya@suse.de>

---

 fs/cifs/connect.c | 1 +

 1 file changed, 1 insertion(+)

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c

index 6b705026da1a..90f38fb9baa0 100644

--- a/fs/cifs/connect.c

+++ b/fs/cifs/connect.c

@@ -3426,6 +3426,7 @@ static int connect_dfs_root(struct mount_ctx *mnt_ctx, struct dfs_cache_tgt_list

 	 */

 	mount_put_conns(mnt_ctx);

 	mount_get_dfs_conns(mnt_ctx);

+	set_root_ses(mnt_ctx);

 	full_path = build_unc_path_to_root(ctx, cifs_sb, true);

 	if (IS_ERR(full_path))

-- 

2.34.1