ksmbd: fix racy issue from session setup and logoff

mainline inclusion
from mainline-v6.4-rc1
commit f5c779b7
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I7BG0L
CVE: CVE-2023-32250,CVE-2023-32252,CVE-2023-32257

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f5c779b7ddbda30866cf2a27c63e34158f858c73



--------------------------------

This racy issue is triggered by sending concurrent session setup and
logoff requests. This patch does not set connection status as
KSMBD_SESS_GOOD if state is KSMBD_SESS_NEED_RECONNECT in session setup.
And relookup session to validate if session is deleted in logoff.

Cc: stable@vger.kernel.org
Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-20481, ZDI-CAN-20590, ZDI-CAN-20596
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: ZhaoLong Wang <wangzhaolong1@huawei.com>