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cifs: Accept validate negotiate if server return NT_STATUS_NOT_SUPPORTED
Old windows version or Netapp SMB server will return NT_STATUS_NOT_SUPPORTED since they do not allow or implement FSCTL_VALIDATE_NEGOTIATE_INFO. The client should accept the response provided it's properly signed. See https://blogs.msdn.microsoft.com/openspecification/2012/06/28/smb3-secure-dialect-negotiation/ and MS-SMB2 validate negotiate response processing: https://msdn.microsoft.com/en-us/library/hh880630.aspx Samba client had already handled it. https://bugzilla.samba.org/attachment.cgi?id=13285&action=edit Signed-off-by: Namjae Jeon <linkinjeon@gmail.com> Signed-off-by: Steve French <stfrench@microsoft.com>
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1 changed files with 8 additions and 2 deletions
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@ -986,8 +986,14 @@ int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
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rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
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FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
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(char *)pneg_inbuf, inbuflen, (char **)&pneg_rsp, &rsplen);
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if (rc != 0) {
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if (rc == -EOPNOTSUPP) {
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/*
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* Old Windows versions or Netapp SMB server can return
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* not supported error. Client should accept it.
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*/
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cifs_dbg(VFS, "Server does not support validate negotiate\n");
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return 0;
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} else if (rc != 0) {
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cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
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rc = -EIO;
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goto out_free_inbuf;
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