kern/38779: NetBSD 4 KP : uvm_fault / proc_trampoline

[jeb%jeb.com.fr@localhost]

>Number:         38779
>Category:       kern
>Synopsis:       NetBSD 4 KP : uvm_fault / proc_trampoline
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed May 28 13:25:00 +0000 2008
>Originator:     Jean-Edouard BABIN
>Release:        4.0.0 and 200805250002Z
>Organization:
>Environment:
Sorry the server is not booting, so I can't do a uname -a.
It's a i386 processor under qemu
>Description:
Hello,

I'm sorry that I can't follow 
http://www.netbsd.org/support/send-pr.html#pr-hints as I did not get any pc = 
line.

I got a KP when booting NetBSD 4.0.0 or 
ftp://ftp.netbsd.org/pub/NetBSD-daily/netbsd-4/200805250002Z/iso/i386cd.iso one 
under QEMU. I did not have much information about QEMU configuration. This is a 
server hosted by a french company (OVH.com). They allow customers to boot their 
server using QEMU to get a sort of virtual KVM on the server.

note that the trace come from the 200805250002Z iso but I got exactly the same 
with 4.0.0 iso but address may be different
You can get the 200805250002Z iso at ftp://ks.jeb.be/i386cd.iso if the iso is 
no longer available on netbsd ftp server when you read the pr
Every thing work fine if I boot NetBSD 3.1 iso

When booting I got this :

NetBSD 4.0_STABLE (INSTALL_LARGE) #0: Sun May 25 19:12:08 PDT 2008
total memory = 877 MB
rbus: rbus_min_start set to 0x40000000
avail memory = 852 MB
...
cpu0 at mainbus0: apid 0 (bootprocessor)
cpu0: Intel Pentium II (Klamath) (686-class) 1201.03Mhz, id 0x633
...
cd0 ar atapibus0 drive 0: <QEMU CD-ROM, QM00003, 0.9.0> cdrom removable
boot device: <unknown>
root on md0a dumps on md0b
root file system type: ffs
WARNING: clock gained 2 days
WARNING: CHECK AND RESET THE DATE!
warning: no /dev/console
uvm_fault(0xc0a20ee0, 0xcb581000, 1) -> 0xe
kernel: supervisor trap page fault, code=0
Stopped in pid 1.1 (init) at netbsd:proc_trampoline+0x4d: ired

>From here I don't what i can do to give you more information ("trace" only 
>give the proc_trampoline call)

You can see the full dmesg view here: ftp://ks.jeb.be/ files Image 1.png  Image 
2.png  Image 3.png and  Image 4.png
>How-To-Repeat:
I think that you will not be able to reproduce easily :/
I will try to get more information about QEMU configuration but not sur that I 
will get them
>Fix: