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Re: in[46]_cksum problems

On Mon, Apr 21, 2008 at 11:38:40AM -0500, David Young wrote:
> ip_input() calls m_pullup() to make the IP header contiguous in the
> first buffer of the mbuf chain, but it calls packet filters through
> pfil(9) afterward.  Perhaps a packet filter is returning an mbuf chain
> with a short mbuf at the front?  A printf after the pfil(9) hook may
> illuminate the problem.

I've seen the problem on a machine w/o any packet filters, just lots
of NFS traffic involved.


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