From: Namjae Jeon <linkinjeon@kernel.org>
Date: Tue, 21 Mar 2023 15:36:40 +0900
Subject: [PATCH] ksmbd: return STATUS_NOT_SUPPORTED on unsupported smb2.0
 dialect
References: bsc#1012628
Patch-mainline: 6.2.9
Git-commit: b53e8cfec30b93c120623232ba27c041b1ef8f1a

commit b53e8cfec30b93c120623232ba27c041b1ef8f1a upstream.

ksmbd returned "Input/output error" when mounting with vers=2.0 to
ksmbd. It should return STATUS_NOT_SUPPORTED on unsupported smb2.0
dialect.

Cc: stable@vger.kernel.org
Reported-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
 fs/ksmbd/smb_common.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/ksmbd/smb_common.c b/fs/ksmbd/smb_common.c
index 2a4fbbd5..538c6151 100644
--- a/fs/ksmbd/smb_common.c
+++ b/fs/ksmbd/smb_common.c
@@ -434,7 +434,7 @@ int ksmbd_extract_shortname(struct ksmbd_conn *conn, const char *longname,
 
 static int __smb2_negotiate(struct ksmbd_conn *conn)
 {
-	return (conn->dialect >= SMB21_PROT_ID &&
+	return (conn->dialect >= SMB20_PROT_ID &&
 		conn->dialect <= SMB311_PROT_ID);
 }
 
@@ -465,7 +465,7 @@ int ksmbd_smb_negotiate_common(struct ksmbd_work *work, unsigned int command)
 		}
 	}
 
-	if (command == SMB2_NEGOTIATE_HE && __smb2_negotiate(conn)) {
+	if (command == SMB2_NEGOTIATE_HE) {
 		ret = smb2_handle_negotiate(work);
 		init_smb2_neg_rsp(work);
 		return ret;
-- 
2.35.3