Oops 2.4-bk : kernel BUG at dcache.c:653!

I've not used ksymoops before, so tell me if I can do something better...

ksymoops 2.4.9 on i686 2.4.21-pre7. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.21-pre7/ (default)
-m /usr/src/linux/System.map (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.

No modules in ksyms, skipping objects
Warning (read_lsmod): no symbols in lsmod, is /proc/modules a valid lsmod file?
Warning (compare_maps): ksyms_base symbol __io_virt_debug_R__ver___io_virt_debug not found in System.map. Ignoring ksyms_base entry kernel BUG at dcache.c:653!

invalid operand: 0000
CPU:    0
EIP:    0010:[<c0162b3d>]    Not tainted

Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010202
eax: c2841294 ebx: c28412c4 ecx: 00000500 edx: 000021b6
esi: f6e6d63c edi: c2841294 ebp: f6e83e70 esp: f6e83e54
ds: 0018 es: 0018 ss: 0018
Process urandom (pid: 12, stackpage=f6e83000)

Stack: f6e87908 080c5766 f6e83f28 00000001 c036b300 00000000 c284261c f6e83eb8
       c019c74f c2841294 f6e6d63c c2841294 f6e8de28 c28347ac 00000000 
f6e82000
       00000000 00000000 00000000 f6e82000 00000000 00000000 c2841294 
f79b6008
Call Trace:    [<c019c74f>] [<c0156e83>] [<c01576cc>] [<c0157cda>] [<c01582da>]
  [<c0148191>] [<c0156a03>] [<c01485a1>] [<c0107bff>]
Code: 0f 0b 8d 02 c1 b5 31 c0 81 3d 04 17 3d c0 ad 4e ad de 74 1c

Trace; c019c74f <devfs_d_revalidate_wait+bf/190>
Trace; c0156e83 <cached_lookup+43/60>
Trace; c01576cc <link_path_walk+45c/840>
Trace; c0157cda <path_lookup+3a/40>
Trace; c01582da <open_namei+6a/610>
Trace; c0148191 <filp_open+41/70>
Trace; c0156a03 <getname+93/d0>
Trace; c01485a1 <sys_open+51/d0>
Trace; c0107bff <system_call+33/38>

Code; c0162b3d <d_instantiate+1d/b0>
00000000 <_EIP>:
Code; c0162b3d <d_instantiate+1d/b0> <=====
0: 0f 0b ud2a <=====
Code; c0162b3f <d_instantiate+1f/b0>
2: 8d 02 lea (%edx),%eax
Code; c0162b41 <d_instantiate+21/b0>
4: c1 (bad)
Code; c0162b42 <d_instantiate+22/b0>
5: b5 31 mov $0x31,%ch
Code; c0162b44 <d_instantiate+24/b0>
7: c0 81 3d 04 17 3d c0 rolb $0xc0,0x3d17043d(%ecx)
Code; c0162b4b <d_instantiate+2b/b0>
e: ad lods %ds:(%esi),%eax
Code; c0162b4c <d_instantiate+2c/b0>
f: 4e dec %esi
Code; c0162b4d <d_instantiate+2d/b0>
10: ad lods %ds:(%esi),%eax
Code; c0162b4e <d_instantiate+2e/b0>
11: de 74 1c 00 fidiv 0x0(%esp,%ebx,1)

3 warnings issued. Results may not be reliable.