Re: Fragment flooding in 2.4.x/2.5.x

From: Trond Myklebust (
Date: Mon Aug 05 2002 - 18:45:54 EST

>>>>> " " == kuznet <> writes:

> Hello!
>> the bug has already been known to crash a few servers...

> Sorry? What crash do you speak about?

You'll find it documented on RedHat's Bugzilla (can't remember the
exact reference - sorry). Basically the first RH-7.3 kernels were
causing a DOS on a couple of Netapps w/ Gigabit connections.

The DOS was traced to a combination of Linux flooding the server with
all these fragments w/o headers (our bug), coupled with inadequate
garbage collection of said fragments on the Netapp side (their bug).

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