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SubjectRe: Linux 2.4.21pre3-ac2
I received the following oops while running the Cerberus stress test on 
2.4.21-pre3-ac2. The hardware is an ASUS A7N8X single AMD Athlon XP
motherboard with the Nvidia nforce2 chipset. The test was only running
for about 5 minutes when the oops occurred. Running the stress test for
more than 24 hours on 2.4.21-pre3 + 2.4.21-pre3-2420ide-1 was successful.

ksymoops 2.4.4 on i686 2.4.21-pre3-ac2. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.21-pre3-ac2/ (default)
-m /boot/ (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.

Unable to handle kernel NULL pointer dereference at virtual address 00000004
*pde = 00000000
Oops: 0002
CPU: 0
EIP: 0010:[<c01354e2>] Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010246
esi: c1a6e950 edi: 00000000 ebp: 00001550 esp: f79fbbac
ds: 0018 es: 0018 ss: 0018
Process kjournald (pid: 124, stackpage=f79fb000)
Stack: c01415f2 0017a908 c03c9390 f7e7ee40 c03c92e0 00000000 c1a6e950
c1a6e950 00000020 00001550 c0134ad7 0000052a f79fa000 00000200
c02fab34 f79fa000 00000000 00000000 00000000 00000020 00000070
Call Trace: [<c01415f2>] [<c0134ad7>] [<c0134c70>] [<c0134cec>]
[<c0135a8b>] [<c013b110>] [<c013b36e>] [<c013b26c>] [<c020182c>]
[<c0201b77>] [<c0201e4f>] [<c013f276>] [<c0201ec1>] [<c0202057>]
[<c0173393>] [<c0172aad>] [<c0171c1f>] [<c01747d6>] [<c0174680>]
Code: 89 58 04 89 03 89 53 04 89 59 5c 89 7b 0c ff 41 68 83 c4 1c

>>EIP; c01354e2 <__free_pages_ok+282/2a0> <=====
Trace; c01415f2 <try_to_free_buffers+d2/160>
Trace; c0134ad7 <shrink_cache+387/3b0>
Trace; c0134c70 <shrink_caches+50/90>
Trace; c0134cec <try_to_free_pages_zone+3c/60>
Trace; c01357d0 <balance_classzone+60/200>
Trace; c0135a8b <__alloc_pages+11b/170>
Trace; c013b110 <alloc_bounce_page+10/a0>
Trace; c013b36e <create_bounce+12e/15c>
Trace; c013b26c <create_bounce+2c/15c>
Trace; c020182c <__make_request+ac/5b0>
Trace; c02018b1 <__make_request+131/5b0>
Trace; c0201b77 <__make_request+3f7/5b0>
Trace; c0201e4f <generic_make_request+11f/140>
Trace; c013f276 <__refile_buffer+56/60>
Trace; c0201ec1 <submit_bh+51/70>
Trace; c0202057 <ll_rw_block+177/1c0>
Trace; c013f297 <refile_buffer+17/20>
Trace; c0173393 <__try_to_free_cp_buf+33/40>
Trace; c0172aad <journal_brelse_array+1d/30>
Trace; c0171c1f <journal_commit_transaction+3af/10dd>
Trace; c01747d6 <kjournald+136/210>
Trace; c0174680 <commit_timeout+0/10>
Trace; c01071d6 <kernel_thread+26/30>
Trace; c01746a0 <kjournald+0/210>
Code; c01354e2 <__free_pages_ok+282/2a0>
00000000 <_EIP>:
Code; c01354e2 <__free_pages_ok+282/2a0> <=====
0: 89 58 04 mov %ebx,0x4(%eax) <=====
Code; c01354e5 <__free_pages_ok+285/2a0>
3: 89 03 mov %eax,(%ebx)
Code; c01354e7 <__free_pages_ok+287/2a0>
5: 89 53 04 mov %edx,0x4(%ebx)
Code; c01354ea <__free_pages_ok+28a/2a0>
8: 89 59 5c mov %ebx,0x5c(%ecx)
Code; c01354ed <__free_pages_ok+28d/2a0>
b: 89 7b 0c mov %edi,0xc(%ebx)
Code; c01354f0 <__free_pages_ok+290/2a0>
e: ff 41 68 incl 0x68(%ecx)
Code; c01354f3 <__free_pages_ok+293/2a0>
11: 83 c4 1c add $0x1c,%esp

1 warning issued. Results may not be reliable.

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