i386/124516: FreeBSD-CURRENT Xen Kernel Segfaults when configuring apache

[David Markey]

>Number:         124516
>Category:       i386
>Synopsis:       FreeBSD-CURRENT Xen Kernel Segfaults when configuring apache
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Jun 12 14:40:03 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator:     David Markey
>Release:        8-CURRENT
>Organization:
IBM
>Environment:
FreeBSD freebsd.dmarkey.com 8.0-CURRENT FreeBSD 8.0-CURRENT #0: Thu May 29 21:49:44 IST 2008     root at freebsd.dmarkey.com:/usr/obj/usr/src/projects/sys/XEN  i386

>Description:
I have built a Xen PAE kernel from cvsup10. The kernel performs OK until when i try to  make apache2 from ports, It gets to this stage:

checking for va_copy... yes
checking whether stdint.h conforms to C99... yes
checking whether strstr works in linear time...  


Then the Kernel segfaults with:

Freebsd kernel: SIGSEGV: pmap=0xc191ecac p=conftest va=0x0 ftype=0x1 eip=0x2814efb4 err=4 *pte=0x0000000000000000



The system then locks up totally.

Xen Config:

name = 'freebsd'
memory = '256'
vif  = [ 'mac=00:16:3e:00:93:01,bridge=br0' ]
disk = [ 'file:/mnt/vmachines/freebsd.filesystem,hdb1,w' ]
on_shutdown = 'destroy'
on_reboot = 'restart'
on_crash = 'destroy'
kernel = '/xen/freebsd/kernelbig'
extra += ",vfs.root.mountfrom=ufs:/dev/xbd833s1a"
extra += ",kern.hz=100"



My Dom0 is Opensuse 10.3 with xen 3.2, AMD64



>How-To-Repeat:
Build/Boot a FreeBSD Xen kernel, Try to build Apache2 from ports.
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: