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cifs: fix missed refcounting of ipc tcon

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commit 65de262a209da0951eb9bc60b3b7faf3bbffa38a upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Paulo Alcantara 2021-12-02 15:29:35 -03:00 committed by Greg Kroah-Hartman
parent ee2d04f23b
commit 5c5c563a08
1 changed files with 1 additions and 0 deletions
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fs/cifs/connect.c
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@ -3390,6 +3390,7 @@ 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))