repeatable 2.4.18-ac2 nfs oops

[Kristian Peters]

Hello.

I recently got this oops with 2.4.18-ac2.
Good news: This one is truely repeatable. Can someone can help me with this ?

ksymoops 2.4.3 on i686 2.4.18-ac2.  Options used
     -V (default)
     -k /proc/ksyms (default)
     -l /proc/modules (default)
     -o /lib/modules/2.4.18-ac2/ (default)
     -m /boot/System.map-2.4.18-ac2 (specified)

Unable to handle kernel NULL pointer dereference at virtual address 00000008 
c0182904 
*pde = 00000000 
Oops: 0000 
CPU:    0 
EIP:    0010:[find_fh_dentry+352/776]    Not tainted 
EFLAGS: 00010217 
eax: 00000000   ebx: 00000000   ecx: 00000005   edx: c02b7860 
esi: 00000005   edi: 00000000   ebp: 11270000   esp: c2dc3e14 
ds: 0018   es: 0018   ss: 0018 
Process nfsd (pid: 266, stackpage=c2dc3000) 
Stack: c313d204 00000005 c3466000 11270000 c36d5f0c c363e840 c0182ca8 c36d5c00  
       c313d214 00000005 00000003 00000001 c2dc3ec0 00000004 c313d294 c313d204  
       c2dc3ea8 c313d214 c2dc3ec0 c3275080 00000040 c0183f34 c30fbe00 c313d204  
Call Trace: [fh_verify+508/988] [nfsd_open+36/480] [nfsd_read+33/600] [inet_sendmsg+58/64] [sock_sendmsg+105/136]  
Code: 8b 47 08 bb 8c ff ff ff 85 c0 0f 84 57 01 00 00 0f b7 40 32  
Using defaults from ksymoops -t elf32-i386 -a i386

Code;  00000000 Before first symbol
00000000 <_EIP>:
Code;  00000000 Before first symbol
   0:   8b 47 08                  mov    0x8(%edi),%eax
Code;  00000002 Before first symbol
   3:   bb 8c ff ff ff            mov    $0xffffff8c,%ebx
Code;  00000008 Before first symbol
   8:   85 c0                     test   %eax,%eax
Code;  0000000a Before first symbol
   a:   0f 84 57 01 00 00         je     167 <_EIP+0x167> 00000166 Before first symbol
Code;  00000010 Before first symbol
  10:   0f b7 40 32               movzwl 0x32(%eax),%eax

On this box there runs a Debian Woody from early February. I can repeat this oops easily having some traffic on a nfs-mounted vfat partition.

hdc: WDC AC22400L, ATA DISK drive
hdc: 4749696 sectors (2432 MB) w/256KiB Cache, CHS=4712/16/63, UDMA(33)

*Kristian

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