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Date: Wed, 5 May 2010 15:20:56 +0200 From: Nils Radtke <Nils.Radtke@...nk-Future.de> To: "Jan Evert van Grootheest (SDG)" <j.e.van.grootheest@...way.nl> Cc: linux-kernel@...r.kernel.org Subject: Re: BUG: unable to handle kernel NULL pointer dereference, i915_gem_object_move_to_active Hi Jan, It's been happening here since first kernel on this box, when "the other OS" had to leave, approx. end of 2008. *ubuntu didn't help either, so far. A kernel NULL ptr deref looks like a serious thing, at least to me. Unfortunately, I'm not yet that deep into kernel code that I myself could do that easily.. Maybe someone more apt in this regard can help us out here? Cheers, Nils On mer 2010-05-05 @ 11-46-11 +0200, Jan Evert van Grootheest (SDG) wrote: # Hi Nils, # # Op 05-05-10 00:22, Nils Radtke schreef: # > Hi, # > # >It happens quite often that X crashes for unknown reasons but this time # It appears the same is (was) happening to my wifes laptop. But I've # never been able to find a reason for it, nor a BUG or WARN. And the # same logoff and firefox crashes that you mention, although it has # Gnome on it instead of KDE. # That was going on with Ubuntu Karmic installed (using standard # Ubuntu 2.6.31 kernel). Yesterday I decided (since she'd be gone for # the whole day) to upgrade to Lucid. I'll have to wait and see # whether that still happens. I have seen already that on some boots # the wireless is not stable (i.e. the connection gets dropped after a # few seconds and re-negotiated), but I guess that's not related. # # As for the hw, it's an Acer Aspire 3650: Celeron, ATI SB400, ATI # based graphics (using the radeon driver) and Atheros based wireless # (using ath5k). So it seems that most of the hw differs except for # the wireless. # # -- Jan Evert # # >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 # > # >-- # >To unsubscribe from this list: send the line "unsubscribe linux-kernel" in # >the body of a message to majordomo@...r.kernel.org # >More majordomo info at http://vger.kernel.org/majordomo-info.html # >Please read the FAQ at http://www.tux.org/lkml/ # > # > # -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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