From owner-freebsd-net@freebsd.org  Tue Dec 19 13:33:32 2017
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Subject: Re: ng_patch and swap_pager_getswapspace error
To: wishmaster <artemrts@ukr.net>, freebsd-net@freebsd.org
References: <1513663683.700534911.voagagit@frv52.fwdcdn.com>
From: Eugene Grosbein <eugen@grosbein.net>
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On 19.12.2017 13:15, wishmaster wrote:
> Hi,
> 
> after I have applied ng_patch for setting TTL for outgoing packets with below rules
> 
> kldload ng_ipfw 2>/dev/null
> kldload ng_patch 2>/dev/null
> 
> /usr/sbin/ngctl -f- <<-SEQ
>                  mkpeer ipfw: patch 100 in
>                  name ipfw:100 ttl_set
>                  msg ttl_set: setconfig { count=1 csum_flags=1 ops=[     \
>                          { mode=1 value=128 length=1 offset=8 } ] }
> SEQ
> 
> /sbin/ipfw add 15002 netgraph 100 ip from me to not me recv "*"

Why do you have incoming ip packets sourced from your IP?
This generally means source was spoofed and such incoming packets
should be silently dropped.

> What is this?

"After" does not mean "because of". Your processes ate all memory and swap
and ng_patch cannot be responsible for that.