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From: "David S. Miller" <davem@redhat.com>
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Date: Sun, 29 Apr 2001 22:10:22 -0700 (PDT)
To: Ralf Nyren <ralf@nyren.net>
Cc: <linux-kernel@vger.kernel.org>, kuznet@ms2.inr.ac.ru
Subject: Re: 2.4.4: Kernel crash, possibly tcp related
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Ralf Nyren writes:
 > The problem appears when this value is set to 40481 or higher. For ex:
 > $ tcpblast -d0 -s 40481 another_host 9000
 ...
 > KERNEL: assertion (!skb_queue_empty(&sk->write_queue)) failed at tcp_timer.c(327):
 > tcp_retransmit_timer
 > Unable to handle kernel NULL pointer dereference...

I'm having a devil of a time finding the tcpblast sources on the
net, can you point me to where I can get them?  The one reference
I saw to get the original sources was:

ftp://ftp.xlink.net/pub/network/tcpblast.shar.gz

But even that directory no longer exists.

The kernel error you see is a gross fatal error, the TCP retransmit
timer has fired yet there are no packets on the transmit queue :-)

My current theory is that tcpblast does something erratic when the
error occurs.

Later,
David S. Miller
davem@redhat.com
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