linux-kernel - Re: 2.6.20-rc6-mm3 BUG in drm

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Date:	Sun, 4 Feb 2007 10:20:29 +1100
From:	"Dave Airlie" <airlied@...il.com>
To:	ebuddington@...leyan.edu
Cc:	"Lee Revell" <rlrevell@...-job.com>, linux-kernel@...r.kernel.org,
	"Thomas Hellström" <thomas@...gstengraphics.com>,
	"Dave Jones" <davej@...hat.com>
Subject: Re: 2.6.20-rc6-mm3 BUG in drm_ioctl with Rage 128 card

> 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

What AGP chipset do you have? it looks like it might be caused by the
AGP changes for TTM..

Dave.
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