[issue1656] DFBSD 2.5.1 X86_64 - Intel video driver crashes the system

[Antonio Huete Jimenez (via DragonFly issue tracker)]

New submission from Antonio Huete Jimenez <tuxillo at quantumachine.net>:

Hi,

Claus reported yesterday on IRC a problem in x86_64 regarding the Intel driver
and Xorg from pkgsrc. The system crashed with both intel and vesa drivers. 
It is a laptop Thinkpad X300.

Below you can find the backtrace:

GNU gdb (GDB) 7.0
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later 
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-dragonfly".
For bug reporting instructions, please see:
. ..
Reading symbols from /var/crash/kern.2...done.

Unread portion of the kernel message buffer:
drm0:  on vgapci0
vgapci0: child drm0 requested pci_enable_busmaster
info: [drm] AGP at 0xe0000000 256MB
info: [drm] Initialized i915 1.6.0 20080730
panic: assertion: behind >= 0 in vm_fault_object
Trace beginning at frame 0xffffffffbe7e5838
() at +0xfa
() at +0xfa
H<8B>H<83>ÇPº
() at H<8B>H<83>ÇPº
+0x6ed
ÿ¾^X() at ÿ¾^X+0x1fd
<83><8D>°() at <83><8D>°+0xea
ºQ() at ºQ+0x20c
%() at %+0x8
(null)() at 0x801f4ca1d
(null)() at 0x8022dddf5
(null)() at 0x8022a04c5
() at 0x42b462
() at 0x47f71e
() at 0x42a66d
() at 0x42a310
(null)() at 0x7ffffffff967
(null)() at 0x6e776f6e6b6e753d
trap.c line 639


Fatal trap 9: general protection fault while in kernel mode
instruction pointer     = 0x8:0xffffffff805b30ae
stack pointer           = 0x10:0xffffffffbe7e56e0
frame pointer           = 0x10:0xffffffffbe7e56f8
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 0, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 3
current process         = 736
current thread          = pri 6 
trap number             = 9
panic: general protection fault
Uptime: 2m18s
Physical memory: 1991 MB
Dumping 364 MB: 349 333 317 301 285 269 253 237 221 205 189 173 157 141 125 109
93 77 61 45 29 13

Reading symbols from /boot/modules/acpi.ko...done.
Loaded symbols for /boot/modules/acpi.ko
Reading symbols from /boot/modules/i915.ko...done.
Loaded symbols for /boot/modules/i915.ko
Reading symbols from /boot/modules/drm.ko...done.
Loaded symbols for /boot/modules/drm.ko
_get_mycpu (di=0xffffffff8085eb20) at ./machine/thread.h:73
73      ./machine/thread.h: No such file or directory.
        in ./machine/thread.h
(kgdb) bt
#0  _get_mycpu (di=0xffffffff8085eb20) at ./machine/thread.h:73
#1  md_dumpsys (di=0xffffffff8085eb20)
    at /usr/src/sys/platform/pc64/x86_64/dump_machdep.c:263
#2  0xffffffff80365bd6 in dumpsys () at /usr/src/sys/kern/kern_shutdown.c:838
#3  0xffffffff80366272 in boot (howto=)
    at /usr/src/sys/kern/kern_shutdown.c:387
#4  0xffffffff80366414 in panic (fmt=0xffffffff805e2888 "%s")
    at /usr/src/sys/kern/kern_shutdown.c:744
#5  0xffffffff805b8316 in trap_fatal (frame=0xffffffffbe7e5628, 
    eva=) at /usr/src/sys/platform/pc64/x86_64/trap.c:999
#6  0xffffffff805b8964 in trap (frame=0xffffffffbe7e5628)
    at /usr/src/sys/platform/pc64/x86_64/trap.c:749
#7  0xffffffff805b188e in calltrap ()
    at /usr/src/sys/platform/pc64/x86_64/exception.S:179
Cannot access memory at address 0xb8
(kgdb) q
hal# ESC[Kexit

----------
messages: 8062
nosy: tuxillo
priority: bug
status: unread
title: DFBSD 2.5.1 X86_64 - Intel video driver crashes the system

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