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kern/47665: IPF only works by chance on some archs

>Number:         47665
>Category:       kern
>Synopsis:       IPF only works by chance on some archs
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Mar 18 19:55:00 +0000 2013
>Originator:     Martin Husemann
>Release:        NetBSD 6.99.17
The NetBSD Foundation, Inc.
System: NetBSD 6.99.17 NetBSD 6.99.17 (NIGHT-OWL) #142: 
Thu Mar 14 21:40:50 CET 2013
Architecture: x86_64
Machine: amd64

IPF inconsistently uses different union fiels, which happen to overlay
to the same storage on some archs but do not align as expected on others.
One example are nat->nat_osport and nat->nat_nicmpid.

Code inspection.

Darren tracks this upstream already - hope he will have some soon.

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