port-vax/51005: panic with gcc 5.3 compiled kernel

[martin%NetBSD.org@localhost]

>Number:         51005
>Category:       port-vax
>Synopsis:       panic with gcc 5.3 compiled kernel
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    port-vax-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Mar 24 15:20:00 +0000 2016
>Originator:     Martin Husemann
>Release:        NetBSD 7.99.26
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD dead-to-the-world.duskware.de 7.99.26 NetBSD 7.99.26 (DEAD) #68: Thu Mar 24 12:19:45 CET 2016 martin%night-owl.duskware.de@localhost:/usr/src/sys/arch/vax/compile/DEAD vax
Architecture: vax
Machine: vax
>Description:

After the compiler/binutils/gdb switch I built the system from scratch
and booted a new kernel. Then I started extracting sets and midway 
through hit this panic:

panic: 466.1 (??): KSP invalid 0x8b940dcc@0x80097d8f pcb 0x8b93f000 fp 0x8b940ef8 psl 0xc00004)
Stopped in pid 466.1 (cron) at  netbsd:vpanic+0xce:     pushl   $
db> bt
panic: 466.1 (??): KSP invalid 0x8b940dcc@0x80097d8f pcb 0x8b93f000 fp 0x8b940ef
8 psl 0xc00004)
Stack traceback :
0x804f9278: vpanic+0xce(0x8019253a,0x804f9318)
0x804f9298: snprintf+0x0(0x8019253a,0x1d2,0x1,0x801abfd0,0x8b940dcc,0x80097d8f,0
x8b93f000,0x8b940ef8,0xc00004)
0x804f92cc: trap+0x6eb(0x804f93b4)
0x804f93b4: trap type=0xf code=0x0 pc=0x80097d8f psl=0xc00004
0x804f9380: uvm_fault_internal+0x25(0x87df191c,0x7f6e6000,0x1,0)
0x8b940ef8: trap+0x394(0x8b940fb4)


>How-To-Repeat:
no idea yet, was extracting sets to local scsi disk, sets lived on NFS.

>Fix:
n/a