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Date:      Mon, 24 Dec 2018 22:03:21 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 234374] Fatal trap 12: page fault while in kernel mode
Message-ID:  <bug-234374-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D234374

            Bug ID: 234374
           Summary: Fatal trap 12: page fault while in kernel mode
           Product: Base System
           Version: 12.0-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: alex@inferiorhumanorgans.com

I haven't tried to reproduce this, but I am running a few jails with vimage.
-----------

kernel trap 12 with interrupts disabled


Fatal trap 12: page fault while in kernel mode
cpuid =3D 0; apic id =3D 00
fault virtual address   =3D 0x50
fault code              =3D supervisor write data, page not present
instruction pointer     =3D 0x20:0xffffffff80bfdf6a
stack pointer           =3D 0x28:0xfffffe0075d5a560
frame pointer           =3D 0x28:0xfffffe0075d5a5a0
code segment            =3D base 0x0, limit 0xfffff, type 0x1b
                        =3D DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        =3D resume, IOPL =3D 0
current process         =3D 11 (idle: cpu0)
trap number             =3D 12
panic: page fault
cpuid =3D 0
time =3D 1545662454
KDB: stack backtrace:
#0 0xffffffff80be7977 at kdb_backtrace+0x67
#1 0xffffffff80b9b563 at vpanic+0x1a3
#2 0xffffffff80b9b3b3 at panic+0x43
#3 0xffffffff8107496f at trap_fatal+0x35f
#4 0xffffffff810749c9 at trap_pfault+0x49
#5 0xffffffff81073fee at trap+0x29e
#6 0xffffffff8104f1d5 at calltrap+0x8
#7 0xffffffff80b9655b at __rw_wlock_hard+0xfb
#8 0xffffffff80bb5515 at softclock_call_cc+0xf5
#9 0xffffffff80bb529e at callout_process+0x1ae
#10 0xffffffff811aa358 at handleevents+0x1a8
#11 0xffffffff811aa9c9 at timercb+0xa9
#12 0xffffffff811e8af6 at lapic_handle_timer+0xb6
#13 0xffffffff81050dfe at Xtimerint+0xae
#14 0xffffffff811df68f at cpu_idle_acpi+0x3f
#15 0xffffffff811df747 at cpu_idle+0xa7
#16 0xffffffff80bcfb25 at sched_idletd+0x515
#17 0xffffffff80b5bf33 at fork_exit+0x83
Uptime: 6d2h2m15s

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