While repeatedly recompiling and restarting xorg-server-1.1.1, I
managed to generate the following BUG. Kernel is 2.6.20-rc6-mm3, video card is
01:00.0 VGA compatible controller: ATI Technologies Inc Rage 128 Pro Ultra TF
(prog-if 00 [VGA])
-Eric
----------------------------------
BUG: unable to handle kernel NULL pointer dereference at virtual address 0000000
0
printing eip:
00000000
*pde = 18cdb067
*pte = 00000000
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 sof
tdog 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_rawmid
i usbnet snd_intel8x0 snd_ac97_codec ac97_bus ipt_tos ipt_owner iptable_nat nf_c
onntrack_ipv4 ipt_MASQUERADE nf_nat nf_conntrack nfnetlink ipt_TOS iptable_filte
r iptable_mangle ip_tables x_tables 8139too sis900 sis5595 hwmon i2c_isa i2c_cor
e sis_agp agpgart ide_scsi
CPU: 0
EIP: 0060:[<00000000>] Tainted: G M VLI
EFLAGS: 00013246 (2.6.20-rc6-mm3 #1)
EIP is at 0x0
eax: f7a3ec60 ebx: 00000000 ecx: f928eda0 edx: 00000000
esi: f7a3ec60 edi: c3c399e0 ebp: 00004000 esp: f355feb0
ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0068
Process X (pid: 30162, ti=f355e000 task=f7932030 task.ti=f355e000)
Stack: f9299ccc 00000800 000006d0 00000003 c1b36570 00000000 00000000 0040ee73
f928eda0 c3c399e0 00000000 f56d2800 f929928c bf94831c 00000000 f52bf1e0
00000000 f51c8860 f93e77bf f93f1800 c029926f 00000000 f93f1810 f56d2800
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:f355feb0
[drm:drm_release] *ERROR* Device busy: 1 0
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