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Date: Sat, 03 Feb 2007 18:09:55 -0500
From: Eric Buddington <ebuddington@verizon.net>
Subject: Re: 2.6.20-rc6-mm3 BUG in drm_ioctl with Rage 128 card
In-reply-to: <75b66ecd0702031322k58db9da7l1ae1fc3a9342682b@mail.gmail.com>
To: Lee Revell <rlrevell@joe-job.com>
Cc: ebuddington@wesleyan.edu, linux-kernel@vger.kernel.org
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On Sat, Feb 03, 2007 at 04:22:17PM -0500, Lee Revell wrote:
> On 2/3/07, Eric Buddington <ebuddington@verizon.net> wrote:
> >EIP:    0060:[<00000000>]    Tainted: G   M   VLI
> >EFLAGS: 00013246   (2.6.20-rc6-mm3 #1)
> 
> The "M" taint flag indicates that a machine check exception has
> occured.  Check your logs for the MCE and make sure the hardware is
> OK.

Lee,

Thanks for pointing that out; I didn't know about that flag. I *think*
there had meen an exception that Google suggested was an ECC-corrected
memory problem (which is suspect, since I don't have ECC RAM).

Anyway, here's a non-tainted one I got after a reboot:

---------------------------------------
agpgart: Found an AGP 3.5 compliant device at 0000:00:00.0.
agpgart: Device is in legacy mode, falling back to 2.x
agpgart: Putting AGP V2 device at 0000:00:00.0 into 1x mode
agpgart: Putting AGP V2 device at 0000:01:00.0 into 1x mode
BUG: unable to handle kernel NULL pointer dereference at virtual address 00000000
 printing eip:
00000000
*pde = 48057067
Oops: 0000 [#1]
last sysfs file: /devices/pci0000:00/0000:00:00.0/class
Modules linked in: ppp_synctty ppp_async crc_ccitt ppp_generic slhc r128 drm softdog keyspan_pda usbserial sch_tbf raw1394 dv1394 ohci1394 ieee1394 snd_ice1712 snd_ice17xx_ak4xxx snd_ak4xxx_adda snd_cs8427 snd_i2c snd_mpu401_uart snd_rawmidi usbnet snd_intel8x0 snd_ac97_codec ac97_bus ipt_tos ipt_owner iptable_nat nf_conntrack_ipv4 ipt_MASQUERADE nf_nat nf_conntrack nfnetlink ipt_TOS iptable_filter iptable_mangle ip_tables x_tables 8139too sis900 sis5595 hwmon i2c_isa i2c_core sis_agp agpgart ide_scsi
CPU:    0
EIP:    0060:[<00000000>]    Not tainted VLI
EFLAGS: 00013246   (2.6.20-rc6-mm3 #1)
EIP is at 0x0
eax: f5e6f2e0   ebx: 00000000   ecx: f928eda0   edx: 00000000
esi: f5e6f2e0   edi: f3604be0   ebp: 00004000   esp: f2c2feb0
ds: 007b   es: 007b   fs: 00d8  gs: 0033  ss: 0068
Process X (pid: 3465, ti=f2c2e000 task=f2c10ab0 task.ti=f2c2e000)
Stack: f9299ccc 00003292 f2401f10 00000010 c164f880 00000000 00000000 00000163 
       f928eda0 f3604be0 00000000 f3bfb000 f929928c f5e6f2e0 00000000 f37113e0 
       00000000 f3604160 f93e77bf f93f1800 c029926f 00000000 f93f1810 f3bfb000 
Call Trace:
 [<f9299ccc>] agp_generic_insert_memory+0x5f/0x147 [agpgart]
 [<f929928c>] agp_bind_memory+0x53/0x64 [agpgart]
 [<f93e77bf>] drm_agp_bind+0x49/0x9f [drm]
 [<c029926f>] copy_to_user+0x2d/0x42
 [<f93e7845>] drm_agp_bind_ioctl+0x30/0x39 [drm]
 [<f93e7815>] drm_agp_bind_ioctl+0x0/0x39 [drm]
 [<f93e3f10>] drm_ioctl+0x14b/0x193 [drm]
 [<f93e3dc5>] drm_ioctl+0x0/0x193 [drm]
 [<c015b94a>] do_ioctl+0x3e/0x4d
 [<c015bb60>] vfs_ioctl+0x207/0x21e
 [<c015bbaa>] sys_ioctl+0x33/0x4d
 [<c0104b30>] sysenter_past_esp+0x5d/0x81
 =======================
Code:  Bad EIP value.
EIP: [<00000000>] 0x0 SS:ESP 0068:f2c2feb0
[drm:drm_release] *ERROR* Device busy: 1 0
pool-71-161-133-234$ dmesg | grep excep
Enabling unmasked SIMD FPU exception support... done.
Machine check exception polling timer started.
pool-71-161-133-234$ dmesg | grep ank  
pool-71-161-133-234$ dmesg | grep -i excep
Enabling unmasked SIMD FPU exception support... done.
Machine check exception polling timer started.
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