oops in 2.4.6/2.4.5

[Victoria W.]

Hello all,

a fax-machine with cyclades-8-card (isa) 256MB, 1GB ext2, 1GB swap, 40GB
reiserfs hangs after a period of time (8-48h) with an oops.
It seems to hang on a "sync" but the messages are not the same every time.
(there was a dead "sync" process in "ps x")

the same behaviour occurs in 2.4.5 and 2.4.6.

I've tried to reproduce the crash by pushing the load up to >100 - but
nothing happens. But within 48h the machine hung again.

Do you have any hints or ideas what to do now ?

best regards
wicki

here is one oops-example:
Unable to handle kernel NULL pointer dereference at virtual address
00000000
 printing eip:
c0005bed
*pde = 00000000
Oops: 0002
CPU:    0
EIP:    0010:[<c0005bed>]
EFLAGS: 00010246
eax: 00000000   ebx: cf3f2690   ecx: c9d80260   edx: c9d80260
esi: cab5dfb8   edi: cab5c000   ebp: 00000000   esp: cab5dfa8
ds: 0018   es: 0018   ss: 0018
Process loop5 (pid: 270, stackpage=cab5d000)
Stack: cab5c000 cecd5f28 cf3f258c c77c1500 00000001 cab5c000 cf3f269c
cf3f269c 
       c0105ca3 cf3f2690 c77c1500 d08288f6 00000f00 cecd5f28 cf3f258c
ffff0303 
       00000078 c010563b c0105644 cf3f258c 00000078 cf229860 
Call Trace: [<c0105ca3>] [<c010563b>] [<c0105644>] 

Code: 00 00 00 7c 67 13 08 32 00 00 00 21 cc 01 cc 61 cb 41 cb 61 

and here an other one from the same machine:

kernel: kernel BUG at page_alloc.c:75!
kernel: invalid operand: 0000
kernel: CPU:    0