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* BUG: unable to handle kernel NULL pointer dereference, i915_gem_object_move_to_active
@ 2010-05-04 22:22 Nils Radtke
  2010-05-05  9:46 ` Jan Evert van Grootheest (SDG)
  2010-05-06 22:07 ` Andrew Morton
  0 siblings, 2 replies; 10+ messages in thread
From: Nils Radtke @ 2010-05-04 22:22 UTC (permalink / raw)
  To: linux-kernel

  Hi,

It happens quite often that X crashes for unknown reasons but this time 
there it's left us a note, this BUG:

BUG: unable to handle kernel NULL pointer dereference at 000001e4
IP: [<c134ddbc>] i915_gem_object_move_to_active+0x1c/0xa0
*pde = 00000000 
Oops: 0000 [#4] PREEMPT 
last sysfs file: /sys/devices/pci0000:00/0000:00:1c.1/0000:04:00.0/net/wlan0/wireless/link
Modules linked in: wlan_scan_sta ath_rate_sample ath_pci ath_hal option usbserial usb_storage snd_usb_audio snd_usb_lib snd_seq_midi snd_rawmidi uvcvideo wlan_ccmp video1394 raw1394 dv1394 firewire_ohci firewire_core wlan ohci1394 tg3 libphy ieee1394 [last unloaded: ath_hal]

Pid: 3328, comm: Xorg Tainted: G      D    2.6.33 #1 Columbia                       /Extensa 5220                   
EIP: 0060:[<c134ddbc>] EFLAGS: 00213282 CPU: 0
EIP is at i915_gem_object_move_to_active+0x1c/0xa0
EAX: 00000000 EBX: c6679450 ECX: c679fd50 EDX: 00b10a13
ESI: 00000000 EDI: 00000000 EBP: 00b10a13 ESP: f51c1cb0
 DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
Process Xorg (pid: 3328, ti=f51c0000 task=f6be5bf0 task.ti=f51c0000)
Stack:
 c6679450 00000004 00000000 c679fd50 c134e83f 00000002 c17d42ab c16e3b29
<0> c17d71ee 00b10a13 00000004 f7395800 f7318000 f7318e10 c1326450 f7318df8
<0> f6baff20 00b10a13 f7318de8 f7318e10 f7318000 00000004 00000001 f7395800
Call Trace:
 [<c134e83f>] ? i915_add_request+0x25f/0x370
 [<c1326450>] ? agp_flush_chipset+0x10/0x20
 [<c1352d55>] ? i915_gem_do_execbuffer+0x1325/0x13a0
 [<c102e087>] ? check_preempt_wakeup+0x87/0x160
 [<c13530ae>] ? i915_gem_execbuffer+0xee/0x4b0
 [<c13531fb>] ? i915_gem_execbuffer+0x23b/0x4b0
 [<c1334056>] ? drm_ioctl+0x186/0x380
 [<c1352fc0>] ? i915_gem_execbuffer+0x0/0x4b0
 [<c10d79dd>] ? do_sync_read+0xad/0xf0
 [<c1333ed0>] ? drm_ioctl+0x0/0x380
 [<c10e5fcb>] ? vfs_ioctl+0x2b/0xa0
 [<c10e61a3>] ? do_vfs_ioctl+0x73/0x5f0
 [<c1038229>] ? do_setitimer+0xd9/0x220
 [<c1058a93>] ? ktime_get_ts+0xe3/0x100
 [<c104e1e0>] ? posix_ktime_get_ts+0x0/0x10
 [<c10e6786>] ? sys_ioctl+0x66/0x70
 [<c1002c8c>] ? sysenter_do_call+0x12/0x22
Code: 8a 8d b4 26 00 00 00 00 8d bc 27 00 00 00 00 83 ec 10 89 c1 89 6c 24 0c 89 d5 89 1c 24 89 74 24 04 89 7c 24 08 8b 40 08 8b 71 50 <8b> b8 e4 01 00 00 8b 46 20 85 c0 74 5f 89 e1 81 e1 00 e0 ff ff 
EIP: [<c134ddbc>] i915_gem_object_move_to_active+0x1c/0xa0 SS:ESP 0068:f51c1cb0
CR2: 00000000000001e4
---[ end trace 13931f32db9a26c3 ]---


- Is there any particular meaning for "last sysfs file" shown? I mean, could there
  be some link between the crash and "last sysfs file"?

- X crashing happens actually a lot on this specific notebook. If it's not X crashing, 
  then unmotivated kde log-offs or frequent firefox crashes contribute their share.
  It's most probably not faulty RAM, it's new, it's been tested thoroughly.


Thanks for some answers,

  Nils


^ permalink raw reply	[flat|nested] 10+ messages in thread
* Re: BUG: unable to handle kernel NULL pointer dereference, i915_gem_object_move_to_active
@ 2010-05-08 14:32 Nils Radtke
  2010-05-08 18:04 ` Daniel Vetter
  0 siblings, 1 reply; 10+ messages in thread
From: Nils Radtke @ 2010-05-08 14:32 UTC (permalink / raw)
  To: linux-kernel; +Cc: Jan Evert van Grootheest (SDG), dri-devel, Daniel Vetter

  Hi,

This might point to the same bug but seen from the process' perspective, it
then contains additional info about hw and kernel versions/circumstances:

  http://lkml.org/lkml/2010/2/18/104

This report might actually be related (in fact, same notebook):

  http://permalink.gmane.org/gmane.linux.kernel/981318

Daniel, I'm not sure I got what you intended to tell me w/:
> There's a test patch in that bz entry (the one that adds two BUG_ONs).
> If you're hitting these, is rather likely that it's the same bug.
bz entry?
I can't tell whether it's this exact bug. And I'm unfortunately a bit limited
in using the notebook to test and crash it, it's not mine and therefore not always 
there to play with, if you intended me to apply some patch and test whether the 
notebook will crash at the BUG_ON()s.

  Thanks,

  Nils


^ permalink raw reply	[flat|nested] 10+ messages in thread

end of thread, other threads:[~2010-05-14 10:27 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2010-05-04 22:22 BUG: unable to handle kernel NULL pointer dereference, i915_gem_object_move_to_active Nils Radtke
2010-05-05  9:46 ` Jan Evert van Grootheest (SDG)
2010-05-05 13:20   ` Nils Radtke
2010-05-06 22:07 ` Andrew Morton
2010-05-08 13:27   ` Daniel Vetter
2010-05-04 22:51     ` BUG: unable to handle kernel NULL ptr Xorg, scheduling while atomic: Xorg/drm Nils Radtke
2010-05-06 22:07       ` Andrew Morton
2010-05-14 10:27       ` BUG: unable to handle kernel NULL pointer dereference, i915_gem_object_move_to_active Nils Radtke
  -- strict thread matches above, loose matches on Subject: below --
2010-05-08 14:32 Nils Radtke
2010-05-08 18:04 ` Daniel Vetter

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