smb2_validate_message_id log message

Stefan (metze) Metzmacher metze at
Tue Nov 5 11:43:16 MST 2013

Am 04.11.2013 17:37, schrieb Brian Martin:
> I'm reposting this on the technical list after not getting any responses
> on the general list.  I'm not quite sure where the division is between
> the two lists.
> I am using samba 4.0.9 under Ubuntu server 12.04.  The samba
> installation in question is a domain member and the primary file server
> in a mixed Linux/Win environment.  The domain controller is also samba
> 4.0.9, .  I occasionally receive messages like the following errors in
> my syslog:
> smbd[2612]: [2013/10/30 14:06:25.368202,  0]
> ../source3/smbd/smb2_server.c:667(smb2_validate_message_id)
> smbd[2612]:   smb2_validate_message_id: client used more credits than
> granted, mid 8, charge 1, credits_granted 0, seqnum low/range: 8/0
> On-line searching hasn't revealed much information about these
> messages.  I see that there is a "smb2 max credits" configuration
> parameter, but the default is 8192 which doesn't jive with the above
> message.  The documentation also says "You should never need to set this
> parameter."  Is this something I need to worry about?  If so, does
> anyone have any insight as to what might be causing this?

This should not happen... Which client generates this?

Can you file a bug at and upload a level 10 log
and a network capture.



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