[Samba] smb2_validate_message_id: client used more credits than granted

[Jeremy Allison]

On Fri, Jun 12, 2015 at 10:05:19AM +0000, Martin Markert wrote:
> Hi,
> sometimes this error appears in our log files. Ist this a bug?
> 
> Jun 11 12:38:00 barbarella smbd[7036]: [2015/06/11 12:38:00.286985,  0] ./source3/smbd/smb2_server.c:668(smb2_validate_message_id)
> Jun 11 12:38:00 barbarella smbd[7036]:   smb2_validate_message_id: client used more credits than granted, mid 4, charge 1, credits_granted 0, seqnum low/range: 4/0
> Jun 11 12:38:01 barbarella smbd[5755]: [2015/06/11 12:38:01.959946,  0] ./lib/util/fault.c:72(fault_report)

What kind of client is this ?