DRI oops

I have installed XFree 4.2.1 (Debian unstable), kernel 2.5.42. I get the same oops everytime X server is restarted or on shutdown.

ksymoops 2.4.6 on i686 2.5.41. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.5.41/ (default)
-m /boot/System.map-2.5.41 (default)

Warning: You did not tell me where to find symbol information. I will assume that the log matches the kernel and modules that are running right now and I'll use the default options above for symbol resolution. If the current kernel and/or modules do not match the log, you can get more accurate output by telling me the kernel version and where to find map, modules, ksyms etc. ksymoops -h explains the options.

e100: eth0: Intel(R) PRO/100 VE Network Connection
e100: eth0 NIC Link is Up 100 Mbps Full duplex
cs: IO port probe 0x0c00-0x0cff: clean.
cs: IO port probe 0x0800-0x08ff: clean.
cs: IO port probe 0x0100-0x04ff: excluding 0x4d0-0x4d7
cs: IO port probe 0x0a00-0x0aff: clean. kernel BUG at mm/page_alloc.c:95!

invalid operand: 0000
CPU:    0
EIP:    0060:[<c012e946>]    Not tainted

Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00013202
eax: 01000001 ebx: c11d2360 ecx: 00000000 edx: 00000001
esi: cba7c000 edi: 00000000 ebp: 00000000 esp: cd047ea8
ds: 0068 es: 0068 ss: 0068

Stack: c11d2360 cba7c000 ce691800 00000000 ce691800 00000000 00003286 cba7d400 
       d07d5000 ce691800 00000000 c0110a7f cba7d400 c012f401 c012f434 d0240301 
       c11d2360 ce4de2a0 ce51a800 d0240347 ce691800 cba7c000 cd047f2c bffffc2c 
Call Trace: [<c0110a7f>]  [<c012f401>]  [<c012f434>]  [<d0240301>]  [<d0240347>]  [<d024092f>]  [<d0240880>]  [<d023bfe6>]  [<c0147ee9>]  [<c010714d>]  [<c0106fcb>] 
Code: 0f 0b 5f 00 ae 1d 28 c0 89 f6 8b 03 a8 40 74 0a 0f 0b 60 00 

Trace; c0110a7f <iounmap+7f/90>
Trace; c012f401 <__free_pages+29/2c>
Trace; c012f434 <free_pages+30/34>
Trace; d0240301 <[i830]i830_free_page+55/5c>
Trace; d0240347 <[i830]i830_dma_cleanup+3f/a4>
Trace; d024092f <[i830]i830_dma_init+af/cc>
Trace; d0240880 <[i830]i830_dma_init+0/cc>
Trace; d023bfe6 <[i830]i830_ioctl+da/e8>
Trace; c0147ee9 <sys_ioctl+27d/2d4>
Trace; c010714d <error_code+2d/38>
Trace; c0106fcb <syscall_call+7/b>

Code; c012e946 <__free_pages_ok+66/2e8>
00000000 <_EIP>:
Code; c012e946 <__free_pages_ok+66/2e8> <=====
0: 0f 0b ud2a <=====
Code; c012e948 <__free_pages_ok+68/2e8>
2: 5f pop %edi
Code; c012e949 <__free_pages_ok+69/2e8>
3: 00 ae 1d 28 c0 89 add %ch,0x89c0281d(%esi)
Code; c012e94f <__free_pages_ok+6f/2e8>
9: f6 8b 03 a8 40 74 (bad) 0x7440a803(%ebx)
Code; c012e955 <__free_pages_ok+75/2e8>
f: 0a 0f or (%edi),%cl
Code; c012e957 <__free_pages_ok+77/2e8>
11: 0b 60 00 or 0x0(%eax),%esp

1 warning issued. Results may not be reliable.