diff options
| author | Namjae Jeon <linkinjeon@kernel.org> | 2023-03-23 21:15:52 +0900 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2023-03-24 00:23:13 -0500 |
| commit | 39b291b86b5988bf8753c3874d5c773399d09b96 (patch) | |
| tree | 2c9f27b43829a45a665f0548defaeedf7dc44bb9 /fs/ksmbd/smb_common.c | |
| parent | b53e8cfec30b93c120623232ba27c041b1ef8f1a (diff) | |
ksmbd: return unsupported error on smb1 mount
ksmbd disconnect connection when mounting with vers=smb1.
ksmbd should send smb1 negotiate response to client for correct
unsupported error return. This patch add needed SMB1 macros and fill
NegProt part of the response for smb1 negotiate response.
Cc: stable@vger.kernel.org
Reported-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/ksmbd/smb_common.c')
| -rw-r--r-- | fs/ksmbd/smb_common.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/fs/ksmbd/smb_common.c b/fs/ksmbd/smb_common.c index 079c9e76818d..9c1ce6d199ce 100644 --- a/fs/ksmbd/smb_common.c +++ b/fs/ksmbd/smb_common.c @@ -442,9 +442,26 @@ static int smb_handle_negotiate(struct ksmbd_work *work) { struct smb_negotiate_rsp *neg_rsp = work->response_buf; - ksmbd_debug(SMB, "Unsupported SMB protocol\n"); - neg_rsp->hdr.Status.CifsError = STATUS_INVALID_LOGON_TYPE; - return -EINVAL; + ksmbd_debug(SMB, "Unsupported SMB1 protocol\n"); + + /* + * Remove 4 byte direct TCP header, add 2 byte bcc and + * 2 byte DialectIndex. + */ + *(__be32 *)work->response_buf = + cpu_to_be32(sizeof(struct smb_hdr) - 4 + 2 + 2); + neg_rsp->hdr.Status.CifsError = STATUS_SUCCESS; + + neg_rsp->hdr.Command = SMB_COM_NEGOTIATE; + *(__le32 *)neg_rsp->hdr.Protocol = SMB1_PROTO_NUMBER; + neg_rsp->hdr.Flags = SMBFLG_RESPONSE; + neg_rsp->hdr.Flags2 = SMBFLG2_UNICODE | SMBFLG2_ERR_STATUS | + SMBFLG2_EXT_SEC | SMBFLG2_IS_LONG_NAME; + + neg_rsp->hdr.WordCount = 1; + neg_rsp->DialectIndex = cpu_to_le16(work->conn->dialect); + neg_rsp->ByteCount = 0; + return 0; } int ksmbd_smb_negotiate_common(struct ksmbd_work *work, unsigned int command) |