ksmbd: send proper error response in smb2_tree_connect()

mainline inclusion
from mainline-v6.2-rc4
commit cdfb2fef
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I74FNG
CVE: CVE-2023-2593

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cdfb2fef522d0c3f9cf293db51de88e9b3d46846



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

Currently, smb2_tree_connect doesn't send an error response packet on
error.

This causes libsmb2 to skip the specific error code and fail with the
following:
 smb2_service failed with : Failed to parse fixed part of command
 payload. Unexpected size of Error reply. Expected 9, got 8

Signed-off-by: Marios Makassikis <mmakassikis@freebox.fr>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: ZhaoLong Wang <wangzhaolong1@huawei.com>