[3513] in linux-net channel archive
The crash 2.0 tcp program
daemon@ATHENA.MIT.EDU (Alan Cox)
Wed Jun 26 20:49:43 1996
Date: Wed, 26 Jun 96 22:42 BST
From: alan@lxorguk.ukuu.org.uk (Alan Cox)
To: linux-net@vger.rutgers.edu, schenk@rnode84.cs.toronto.edu,
torvalds@cs.helsinki.fi
Ok this appears to run us out of buffers with one end of a connection in
the state where bytes_rcv > max_unacked. This causes the following
unfortunate sequence:
tcp_send_ack
no free memory ... delay and send
tcp_send_delayed_ack
bytes_rcv > max_unacked
set timer for now and mark timer_bh to be run
timer_bh runs immediately, no buffers will be freed
tcp_send_ack
no free memory.. delay and send
etc etc
Kaboom
I'm not convinced thats the only case this can happen now, but its the obvious
one.
Alan
