diff options
Diffstat (limited to 'fs/ksmbd/smb_common.c')
| -rw-r--r-- | fs/ksmbd/smb_common.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/fs/ksmbd/smb_common.c b/fs/ksmbd/smb_common.c index 43d3123d8b62..40f4fafa2e11 100644 --- a/fs/ksmbd/smb_common.c +++ b/fs/ksmbd/smb_common.c @@ -129,16 +129,22 @@ int ksmbd_lookup_protocol_idx(char *str) * * check for valid smb signature and packet direction(request/response) * - * Return: 0 on success, otherwise 1 + * Return: 0 on success, otherwise -EINVAL */ int ksmbd_verify_smb_message(struct ksmbd_work *work) { - struct smb2_hdr *smb2_hdr = work->request_buf; + struct smb2_hdr *smb2_hdr = work->request_buf + work->next_smb2_rcv_hdr_off; + struct smb_hdr *hdr; if (smb2_hdr->ProtocolId == SMB2_PROTO_NUMBER) return ksmbd_smb2_check_message(work); - return 0; + hdr = work->request_buf; + if (*(__le32 *)hdr->Protocol == SMB1_PROTO_NUMBER && + hdr->Command == SMB_COM_NEGOTIATE) + return 0; + + return -EINVAL; } /** @@ -265,7 +271,6 @@ static int ksmbd_negotiate_smb_dialect(void *buf) return BAD_PROT_ID; } -#define SMB_COM_NEGOTIATE 0x72 int ksmbd_init_smb_server(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; |