mount (umount?) -> fatal page fault in supervisor mode

[Havard Eidnes <he%uninett.no@localhost>]

Hi,

I just got this panic when rebooting a reasonably recent 4.99.66
kernel on one of our i386 boxes:

Jun 22 10:03:06 ctd su: he to root on /dev/pts/0
Jun 22 10:25:12 ctd shutdown: reboot by he: 
Jun 22 10:25:22 ctd syslogd: Exiting on signal 15
uvm_fault(0xc0b2b0e0, 0xce0aa000, 1) -> 0xe
fatal page fault in supervisor mode
trap type 6 code 0 eip c04ddf95 cs 8 eflags 10296 cr2 ce0aa039 ilevel 0
kernel: supervisor trap page fault, code=0
Stopped in pid 197.1 (mount_mfs) at     netbsd:VFS_START+0x25:  testb   
$0x1,0x39(%ebx)
db{1}> trace   
VFS_START(ce0aa000,0,0,cdfcfcc0,0,0,cdfcfbdc,cdfcfbd8,1000008,c3531900) at 
netbsd:VFS_START+0x25
do_sys_mount(cdfe1d40,0,8050cc2,bfbfff97,40,bfbfece0,0,78,cdfcfcd8,0) at 
netbsd:do_sys_mount+0x9bd
compat_40_sys_mount(cdfe1d40,cdfcfd00,cdfcfd28,bbaf334c,bbaf3000,cdfe5964,1,8050cc2,bfbfff97,40)
 at netbsd:compat_40_sys_mount+0x48
syscall(cdfcfd48,b3,ab,bfbf001f,bbba001f,0,bfbfeed8,bfbfee68,0,bfbfece0) at 
netbsd:syscall+0xab
db{1}>         

Is this a known problem?

Regards,

- Håvard