ip_forward() crash

[Max Laier]

So this page fault happens where? Maybe you want m_dup() rather than
m_copypacket() - esp. in case you get the page fault when trying to modify
the packet before sending it back to the sender.

Max

> Hi,
>   I am using freebsd 4.5 and in the ip_input.c at the place
> where IP decides to forward a mbuf not destined to itself,
> I added one of my function which included a call of ip_forward() to send
> out a my m_copyed mbuf to the sender. so basically there are two calls to
> ip_forward(), one is to relay mbuf from the sender and the other is
> forward back a copy of it. However, this behavior crashed my freebsd with
> trap 12 saying page fault in kernel. Does anyone have the same experience
> and know what's wrong with this?
>
>  Any suggestion is highly appreciated.
> please cc to me because I am not on the list.
>
> Thanks,
>
> -Haijin Yan