Date: Mon, 27 Sep 1999 13:18:01 -0400 (EDT) From: Mikhail Teterin <mi@aldan.algebra.com> To: stable@freebsd.org Subject: Re: nmap V. 2.3BETA5 causes panic Message-ID: <199909271718.NAA40833@misha.cisco.com> In-Reply-To: <4.2.0.58.19990927032147.00a3d680@mail.elcjn1.sdca.home.com> from Bryan Talbot at "Sep 27, 1999 03:28:29 am"
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Bryan Talbot once wrote:
> At 02:43 AM 9/27/99 , Andy Farkas wrote:
> >The system will panic with an 'out of mbufs' message when I run the
> >above nmap command ("ping scan" a class B subnet - my internal IP
> >network).
> I'm no expert but this basic question has been asked many times on
> this list recently. It seems to be a known problem that FreeBSD
> currently panics if it runs out of mbufs. We all wish this wasn't so
> and maybe someday it won't be.
Actually, there are systems out there where this is NOT so. I would not
be so tactless to point it out, but it is FreeBSD-2.2*. Once, after 3
monthes of uptime, I tried to simulate an "attack" on my (colocated)
web-server -- a humble P100 with 32Mb of RAM on 100Mb network -- by
issuing numerous fetch-requests from a machine nearby. The requests
where steadily growing in number and in a couple of minutes the server
locked up. I was preparing to call the ISP (Ziplink) to ask them to
reboot it, but it unlocked in about 40 seconds. There were "out of mbuf"
messages in the log, but it stayed up for over 10 more monthes (!) until
finaly its IDE disk started to glitch.
And that was not even the 2.2.x-RELEASE or anything, but some sort of
2.2-BETA or something. Too bad out current ISP (9NetAve) has some sorts
of mistery problem (I suspect some dummy just trips over the power
cables once in a while), so I cannot get over 3 monthes of uptime from
the our new 2.2.8 machine.
Or is this a different type of "out of mbuf..."?
-mi
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