panic: m_copym, length > size of mbuf chain

[Robert Watson]

On Sun, 11 Jul 2004, Daniel Lang wrote:

> referring to your first answer, the 'len' parameter in the tcp_output.c
> frame is 1460, offset is 737. The sum is obviously greater than 975, the
> value of so->so_snd.sb_cc. 
> 
> So the suggested assertion from Robert would have been triggered. I
> consider now adding the SOCKBUF_DEBUG value. However, with SACK
> disabled, the machine is still up and running now. 

Is it possible to get the box running with SACK again for debugging
purposes?  Resolving this issue would be a very good thing.  Thanks!

Robert N M Watson             FreeBSD Core Team, TrustedBSD Projects
robert at fledge.watson.org      Principal Research Scientist, McAfee Research