Bug#283653: kernel-image-2.4.27-1-686: Unable to handle kernel NULL pointer dereference

[Cyril Bouthors <cyb@debian.org>]

Package: kernel-image-2.4.27-1-686
Version: 2.4.27-2
Severity: normal

Hi,

I'm having this error several times a month on a heavy loaded
production NFS server with RAID0:

Unable to handle kernel NULL pointer dereference at virtual address 00000020
 printing eip:
f884488e
*pde = 00000000
Oops: 0002
CPU:    0
EIP:    0010:[raid0:__insmod_raid0_O/lib/modules/2.4.27-1-686/kernel/drivers/md+-235378/96]    Not tainted
EFLAGS: 00010202
eax: f884d6a0   ebx: efd32600   ecx: 00000000   edx: 00000020
esi: efd32600   edi: c2825f5c   ebp: 00001ee2   esp: c2825f1c
ds: 0018   es: 0018   ss: 0018
Process kswapd (pid: 4, stackpage=c2825000)
Stack: efd32600 efd32600 c0153734 efd32600 efd32608 c015379d efd32600 f421cc28
       c0150018 c3581408 c35817c0 c35817c8 00000000 c0153a24 c2825f5c 00015d9c
       efd32428 f50ebdc8 000001d0 0000003c 00000015 c025d478 c0153bb4 00015d9c
Call Trace:    [clear_inode+196/224] [dispose_list+77/176] [__get_lease+488/608] [prune_icache+100/464] [shrink_icache_memory+36/64]
  [try_to_free_pages_zone+143/256] [kswapd_balance_pgdat+102/176] [kswapd_balance+40/64] [kswapd+152/185] [_stext+0/64] [arch_kernel_thread+46/64]
  [kswapd+0/185]

Code: ff 0a 0f 94 c0 84 c0 75 44 ba ff ff ff ff 89 93 8c 01 00 00
 <5>__alloc_pages: 0-order allocation failed (gfp=0xf0/0)

It doesn't seem to be a bug in raid0.c according to Neil Brown
<neilb@cse.unsw.edu.au>: "The reference to raid0 is purely accidental
- the offset into raid0 that is mentioned is -235378 : a negative
number !!!!".

Is there a way to fix this?

Thanks.

-- System Information:
Debian Release: 3.1
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: i386 (i686)
Kernel: Linux 2.6.9-1-686
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)

Versions of packages kernel-image-2.4.27-1-686 depends on:
ii  coreutils [fileutils]         5.2.1-2    The GNU core utilities
ii  fileutils                     5.2.1-2    The GNU file management utilities 
ii  initrd-tools                  0.1.74     tools to create initrd image for p
ii  modutils                      2.4.26-1.1 Linux module utilities