nmbd fork-bombed my server

Mike Black mblack at csihq.com
Wed Sep 16 15:40:41 GMT 1998

I trace this down to the ASYNC_DNS.  Didn't test commenting it out but I'll
bet that will solve the problem.  I noticed a new nmbd running for every DNS
request and reported it to the bug list.

-----Original Message-----
From: Robbert Heederik <heederik at wins.uva.nl>
To: Multiple recipients of list <samba-ntdom at samba.anu.edu.au>
Date: Wednesday, September 16, 1998 9:00 AM
Subject: Re: nmbd fork-bombed my server

>On Wed, Sep 16, 1998 at 10:27:10PM +1000, Markus Koelle wrote:
>> I've installed the 98-09-14-CVS-code an my linux machine (2.0.35-Kernel).
>> 20 hours later my network with only very few clients becomes slower and
>> slower. An "ps -ax|grep nmbd" and I was shocked : hundred or so nmbd-
>> processes - out of memory!
>> The restart of "nmbd" was impossible - only a server reboot helps.
>I have had the same thing happening on three servers running 2.0.0
>alpha4 and had to reboot two of them.  Crash dumps showed that they
>were 'running' 2300+ nmbd processes...   The third machine had only
>been running 2.0.0-alpha4 for a few hours without many connections and
>I could stop samba in time.
>After some experimenting, I am now running with the following setup:
>nmbd -> nmbd-1.9.18p4_ntdom
>smbd -> smbd-2.0.0-alpha4
>It works fine for now, but are there any consequences of running different
>versions of nmbd and smbd?
>My configuration:
>Servers: Solaris 2.5.1 and 2.6 Sparc's running as PDC's
>Clients: mix of NT 4.0 SP3, NT 3.51, W95.
>%!PS       Robbert Heederik, heederik at wins.uva.nl, University of Amsterdam
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>{ 1 add ( ) dup 0 4 3 roll put show} forall -1 .5 translate } for showpage

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