Description of problem:
I have got a kernel panic several times recently. Only twice I could register
the message. THe first one is:

Unable to handle kernel paging request at virtual address ef0441fe
 printing eip:
d081ccfa
*pde = 00000000
Oops: 0000
loop soundcore nfs lockd sunrpc 3c59x ipchains ide-cd cdrom ext3 jbd
CPU:    0
EIP:    0010:[<d081ccfa>]    Not tainted
EFLAGS: 00010206

EIP is at ext3_count_free_inodes [ext3] 0xa (2.4.18-18.7.x)
eax: ef0441ee   ebx: 00000000   ecx: 000765fd   edx: ceba7f50
esi: 00000128   edi: c1a6e000   ebp: 00025280   esp: ceba7f14
ds: 0018   es: 0018   ss: 0018
Process sendmail (pid: 858, stackpage=ceba7000)
Stack: d0824b1b c1a6e000 cfe7d400 c1a6e000 ceba7f50 ceba7f90 bfffde68 c0138269
       c1a6e000 ceba7f50 00000000 bfffde20 c01382a9 c1a6e000 ceba7f50 0000ef53
       00001000 0091a553 00239fae 001c39b1 004a0000 00000000 00000000 00000000
Call Trace: [<d0824b1b>] ext3_statfs [ext3] 0xdb (0xceba7f14))
[<c0138269>] vfs_statfs [kernel] 0x39 (0xceba7f30))
[<c01382a9>] sys_statfs [kernel] 0x39 (0xceba7f44))
[<c0128c74>] sys_munmap [kernel] 0x34 (0xceba7fa0))
[<c010894b>] system_call [kernel] 0x33 (0xceba7fc0))


Code: 8b 40 10 c3 e8 05 ab 8e ef e9 9d f2 ff ff e8 1f ab 8e ef e9

The second one (occured less than 24 hours later) is:
Unable to handle kernel NULL pointer dereference at virtual address 00000010
printing eip:
d081ccfa
*pde = 00000000
Oops: 0000
soundcore nfs lockd sunrpc 3c59x ipchains ide-cd cdrom ext3 jbd
CPU:    0
EIP:    0010:[<d081ccfa>]    Not tainted
EFLAGS: 00010212

EIP is at ext3_count_free_inodes [ext3] 0xa (2.4.18-18.7.x)
eax: 00000000   ebx: 00000000   ecx: 000765fd   edx: cca95f50
esi: 00000128   edi: c1a6e000   ebp: 00025280   esp: cca95f14
ds: 0018   es: 0018   ss: 0018
Process sendmail (pid: 870, stackpage=cca95000)
Stack: d0824b1b c1a6e000 cfe7d400 c1a6e000 cca95f50 cca95f90 bfffde68 c0138269
       c1a6e000 cca95f50 00000000 bfffde20 c01382a9 c1a6e000 cca95f50 0000ef53
       00001000 0091a553 002314c8 001baecb 004a0000 00000000 00000000 00000000
Call Trace: [<d0824b1b>] ext3_statfs [ext3] 0xdb (0xcca95f14))
[<c0138269>] vfs_statfs [kernel] 0x39 (0xcca95f30))
[<c01382a9>] sys_statfs [kernel] 0x39 (0xcca95f44))
[<c0128c74>] sys_munmap [kernel] 0x34 (0xcca95fa0))
[<c010894b>] system_call [kernel] 0x33 (0xcca95fc0))

Code: 8b 40 10 c3 e8 05 ab 8e ef e9 9d f2 ff ff e8 1f ab 8e ef e9

his is a uni-cpu box. If you need more info, just ask.

Version-Release number of selected component (if applicable):


How reproducible:
Sometimes

Steps to Reproduce:
1. IO load seems to increase probability of this panic.


Actual Results:  Hang

Expected Results:  Continuation.

Additional info:

Nothing I can think of.