9.2-STABLE: supervisor read data, page not present

[Oliver Pinter]

Hi!

I got this panic on recent 9-STABLE (amd64):

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Unread portion of the kernel message buffer:
<118>Sep  8 20:22:34 pandora-d syslogd: exiting on signal 15


Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x78
fault code              = supervisor read data, page not present
instruction pointer     = 0x20:0xffffffff80482a05
stack pointer           = 0x28:0xffffff800024e7d0
frame pointer           = 0x28:0xffffff800024e800
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 1 (init)
trap number             = 12
panic: page fault
cpuid = 0
KDB: stack backtrace:
#0 0xffffffff804cd660 at kdb_backtrace+0x60
#1 0xffffffff8049797e at panic+0x1fe
#2 0xffffffff8069e3da at trap_fatal+0x37a
#3 0xffffffff8069e64b at trap_pfault+0x25b
#4 0xffffffff8069dd74 at trap+0x454
#5 0xffffffff80688543 at calltrap+0x8
#6 0xffffffff8046893b at proc_reap+0x4bb
#7 0xffffffff80468d51 at proc_to_reap+0x361
#8 0xffffffff80467ddb at kern_wait6+0x22b
#9 0xffffffff804679b6 at sys_wait4+0x76
#10 0xffffffff8069eb9d at amd64_syscall+0x29d
#11 0xffffffff8068882b at Xfast_syscall+0xfb
Uptime: 34m20s
Dumping 367 out of 4084 MB:..5%..14%..22%..31%..44%..53%..62%..75%..83%..92%

This is fully reproducible.

The HEAD stay on :

commit aba57138f98f1a98e4b7c7c61511daefb0542524
Author: des <des at FreeBSD.org>
Date:   Sun Sep 8 10:04:26 2013 +0000

    Make libldns and libssh private.

    Approved by:        re (blanket)

Notes:
    svn path=/head/; revision=255386

The panic first appeared on likely between august 8 and 17.

When you need more info, the ping me.
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