Message-ID: <4C4EC2F4.9040906@ribosome.natur.cuni.cz>
Date:	Tue, 27 Jul 2010 13:28:52 +0200
From:	Martin Mokrejs <mmokrejs@...osome.natur.cuni.cz>
To:	LKML <linux-kernel@...r.kernel.org>
CC:	Dave Airlie <airlied@...ux.ie>
Subject: Re: 2.6.34 and 2.6.35-rc6-git2: kernel crash downstream of generic_file_aio_write
 and i830_swap_bufs

For completeness I am attaching the output from X server.
M.

Martin Mokrejs wrote:
> Hi,
>   I have a kernel crash with _intel_ drm driver on Acer LCi291 laptop with builtin Intel 855GM card
> when I start /usr/bin/X (it does work when "vesa" instead of "intel" drm driver is called from
> xorg.conf, though).
 
[cut]

> Here is a crash with 2.6.35-rc6-git2 as well:
> [cut]
> [    5.074544] agpgart-intel 0000:00:00.0: Intel 855GM Chipset
> [    5.075090] agpgart-intel 0000:00:00.0: detected 16252K stolen memory
> [    5.077817] agpgart-intel 0000:00:00.0: AGP aperture is 128M @ 0xb0000000
> [cut]
> [   57.952849] BUG: unable to handle kernel NULL pointer dereference at (null)
> [   57.952863] IP: [<efae80bc>] i830_swap_bufs+0x2a/0x2ab [i830]
> [   57.952885] *pde = 00000000 
> [   57.952893] Oops: 0000 [#1] 
> [   57.952901] last sysfs file: /sys/devices/pci0000:00/0000:00:02.1/resource
> [   57.952910] Modules linked in: i830 firewire_ohci snd_intel8x0m ipw2100 snd_intel8x0 irda parport_pc parport intel_agp firewire_core snd_ac97_codec libipw i2c_i801 rtc_cmos ac97_bus
> [   57.952948] 
> [   57.952959] Pid: 5345, comm: X Not tainted 2.6.35-rc6-git2 #1 855GM      /TravelMate 290           
> [   57.952970] EIP: 0060:[<efae80bc>] EFLAGS: 00213246 CPU: 0
> [   57.952982] EIP is at i830_swap_bufs+0x2a/0x2ab [i830]
> [   57.952991] EAX: 00000000 EBX: ed038a20 ECX: ed038a20 EDX: ed038a80
> [   57.953001] ESI: ed24ec00 EDI: 00000046 EBP: ee233e70 ESP: ee233e34
> [   57.953010]  DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
> [   57.953021] Process X (pid: 5345, ti=ee232000 task=ee03dd40 task.ti=ee232000)
> [   57.953028] Stack:
> [   57.953033]  00000001 efae9e65 efae9b50 efaea1d5 00000000 ee233f20 ee233f18 ed24ec00
> [   57.953050] <0> c11106d7 ee233e70 c111070a ee233e8c ed038a20 ed24ec00 00000046 ee233f18
> [   57.953068] <0> c11765f5 bfc15960 efae8092 efaea774 c0086446 ee233e8c 00000005 bfc1596c
> [   57.953087] Call Trace:
> [   57.953104]  [<c11106d7>] ? might_fault+0x8/0xa
> [   57.953116]  [<c111070a>] ? _copy_from_user+0x31/0x115
> [   57.953131]  [<c11765f5>] ? drm_ioctl+0x211/0x2a1
> [   57.953145]  [<efae8092>] ? i830_swap_bufs+0x0/0x2ab [i830]
> [   57.953160]  [<c104d7f0>] ? generic_file_aio_write+0x87/0x9e
> [   57.953175]  [<c1069e09>] ? do_sync_write+0x89/0xc4
> [   57.953187]  [<c11763e4>] ? drm_ioctl+0x0/0x2a1
> [   57.953200]  [<c1073241>] ? vfs_ioctl+0x15/0x49
> [   57.953212]  [<c1073724>] ? do_vfs_ioctl+0x40b/0x43f
> [   57.953225]  [<c1069bd0>] ? fsnotify_modify+0x4f/0x5a
> [   57.953237]  [<c1069d80>] ? do_sync_write+0x0/0xc4
> [   57.953248]  [<c106a5c9>] ? vfs_write+0x98/0xac
> [   57.953260]  [<c1073786>] ? sys_ioctl+0x2e/0x48
> [   57.953273]  [<c1002510>] ? sysenter_do_call+0x12/0x26
> [   57.953280] Code: c3 55 89 e5 57 56 53 83 ec 20 89 45 e0 89 cb 68 d5 a1 ae ef 68 50 9b ae ef 68 65 9e ae ef 6a 01 e8 c8 19 69 d1 8b 53 40 8b 42 3c <8b> 08 83 c4 10 85 c9 79 05 39 5a 40 74 2d 8b 00 53 ff 72 40 25 
> [   57.953370] EIP: [<efae80bc>] i830_swap_bufs+0x2a/0x2ab [i830] SS:ESP 0068:ee233e34
> [   57.953387] CR2: 0000000000000000
> [   57.953396] ---[ end trace 9e76fe13d3edd6f6 ]---
> [   57.957541] [drm:drm_release] *ERROR* Device busy: 1

View attachment "Xorg.log" of type "text/plain" (6228 bytes)

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