Subject: Re: linux-next: Tree for December 17 (Radeon DRM BUG)

From: "Dave Airlie" <[email-masked]>
Date: Thu, 18 Dec 2008 16:47:59 +1000

On Thu, Dec 18, 2008 at 10:14 AM, Kevin Winchester
<[email-masked]> wrote:
> Stephen Rothwell wrote:
>>
>> Hi all,
>>
>>
>
> I get the following BUG in the radeon drm code with today's linux-next when
> I run "startx".  I have not built or tested linux-next in a while, but the
> problem definitely does not occur in mainline.

Do you have another X server running or just console?

can you get a full dmesg with

echo 1 > /sys/module/drm/parameters/debug

Dave.

>
> Dec 17 20:02:41 winchester [   43.741709] BUG: unable to handle kernel NULL
> pointer dereference at 0000000000000000
> Dec 17 20:02:41 winchester [   43.741723] IP: [<ffffffff8038411d>]
> radeon_cp_init+0x311/0x9f6
> Dec 17 20:02:41 winchester [   43.741740] PGD 4d501067 PUD 4d533067 PMD 0
> Dec 17 20:02:41 winchester [   43.741747] Oops: 0002 [#1]
> Dec 17 20:02:41 winchester [   43.741751] last sysfs file:
> /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0/resource
> Dec 17 20:02:41 winchester [   43.741757] CPU 0
> Dec 17 20:02:41 winchester [   43.741760] Modules linked in:
> Dec 17 20:02:41 winchester [   43.741766] Pid: 3630, comm: X Not tainted
> 2.6.28-rc8-next-20081217 #192
> Dec 17 20:02:41 winchester [   43.741771] RIP: 0010:[<ffffffff8038411d>]
>  [<ffffffff8038411d>] radeon_cp_init+0x311/0x9f6
> Dec 17 20:02:41 winchester [   43.741780] RSP: 0018:ffff88004d575e18
>  EFLAGS: 00010282
> Dec 17 20:02:41 winchester [   43.741784] RAX: ffff88004f36d640 RBX:
> ffff88004f257400 RCX: ffff88004f36d640
> Dec 17 20:02:41 winchester [   43.741789] RDX: 0000002000000002 RSI:
> ffff88004f3fd000 RDI: ffff88004f085800
> Dec 17 20:02:41 winchester [   43.741793] RBP: ffff88004d575e38 R08:
> ffff88004d559600 R09: ffff88004d575ef8
> Dec 17 20:02:41 winchester [   43.741798] R10: 0000000000000000 R11:
> 0000000000003202 R12: ffff88004f085800
> Dec 17 20:02:41 winchester [   43.741802] R13: ffff88004eb9d500 R14:
> 0000000000000000 R15: ffff88004eb9db00
> Dec 17 20:02:41 winchester [   43.741808] FS:  00007f845ffa26f0(0000)
> GS:ffffffff80699e40(0000) knlGS:0000000000000000
> Dec 17 20:02:41 winchester [   43.741813] CS:  0010 DS: 0000 ES: 0000 CR0:
> 000000008005003b
> Dec 17 20:02:41 winchester [   43.741817] CR2: 0000000000000000 CR3:
> 000000004d55f000 CR4: 00000000000006e0
> Dec 17 20:02:41 winchester [   43.741822] DR0: 0000000000000000 DR1:
> 0000000000000000 DR2: 0000000000000000
> Dec 17 20:02:41 winchester [   43.741826] DR3: 0000000000000000 DR6:
> 00000000ffff0ff0 DR7: 0000000000000400
> Dec 17 20:02:41 winchester [   43.741832] Process X (pid: 3630, threadinfo
> ffff88004d574000, task ffff88004f287330)
> Dec 17 20:02:41 winchester [   43.741835] Stack:
> Dec 17 20:02:41 winchester [   43.741838]  00000000fffffff4 0000000040786440
> ffff88004f085800 ffffffff80383e0c
> Dec 17 20:02:41 winchester [   43.741845]  ffff88004d575e98 ffffffff8037249e
> ffff88004d575e48 ffff88004d575e48
> Dec 17 20:02:41 winchester [   43.741852]  00007fff67fbf5a0 ffff88004eb9d500
> ffff88004f08583c ffff88004d559600
> Dec 17 20:02:41 winchester [   43.741860] Call Trace:
> Dec 17 20:02:41 winchester [   43.741865]  [<ffffffff80383e0c>] ?
> radeon_cp_init+0x0/0x9f6
> Dec 17 20:02:41 winchester [   43.741871]  [<ffffffff8037249e>]
> drm_ioctl+0x1de/0x270
> Dec 17 20:02:41 winchester [   43.741881]  [<ffffffff80298d2e>]
> vfs_ioctl+0x4a/0x55
> Dec 17 20:02:41 winchester [   43.741890]  [<ffffffff8029911a>]
> do_vfs_ioctl+0x3b2/0x3ff
> Dec 17 20:02:41 winchester [   43.741896]  [<ffffffff8028d0fa>] ?
> fsnotify_modify+0x4e/0x53
> Dec 17 20:02:41 winchester [   43.741904]  [<ffffffff802991ac>]
> sys_ioctl+0x45/0x80
> Dec 17 20:02:41 winchester [   43.741910]  [<ffffffff8028de98>] ?
> sys_write+0x62/0x72
> Dec 17 20:02:41 winchester [   43.741917]  [<ffffffff8020b94b>]
> system_call_fastpath+0x16/0x1b
> Dec 17 20:02:41 winchester [   43.741925] Code: 00 00 49 8b 45 60 48 89 83
> f8 00 00 00 49 8b 45 68 48 89 83 00 01 00 00 49 8b 45 70 48 89 83 08 01 00
> 00 e8 7e da fe ff 48 85 c0 <49> 89 06 48 c7 c6 b0 4e 4d 80 48 c7 c7 13 4a 5c
> 80 0f 84 a7 fd
> Dec 17 20:02:41 winchester [   43.741970] RIP  [<ffffffff8038411d>]
> radeon_cp_init+0x311/0x9f6
> Dec 17 20:02:41 winchester [   43.741977]  RSP <ffff88004d575e18>
> Dec 17 20:02:41 winchester [   43.741980] CR2: 0000000000000000
> Dec 17 20:02:41 winchester [   43.741984] ---[ end trace dc6d31ddec008340
> ]---
> Dec 17 20:02:41 winchester [   43.761235] [drm:drm_release] *ERROR* Device
> busy: 1
>
> What other information can I provide?
>
> --
> Kevin Winchester
>
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