Today at around 11:50am EST my server which is co-located in California
pretty much cut me off.
No passwords would be accepted though telnet, ftp, ssh/ssh2 both failed. My
only savior was webmin. It took me 5 hours of trying to track down the
problem with no shell (very frustrating) and eventually I had to reboot it.
I finally just got back in and started browsing the logs. Oh man. The
kernel hit HARD. The wierd thing was that the only problem was that I
couldn't login to get a console. I could check my mail (POP), browse the
website, use webmin, etc. I was super frustrated.
I got about 300KB worth of these kernel errors. Here's the output from the
first one: (the others are mostly sshd2(us trying to get in), and crond.
Kernel 2.2.14 SMP [I tried to compile 2.2.15. It locked the box up. =( ]
--------------------------------
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.
No modules in ksyms, skipping objects
Warning, no symbols in lsmod, is /proc/modules a valid lsmod file?
Unable to handle kernel NULL pointer dereference at virtual address 00000082
current->tss.cr3 = 036dd000, %cr3 = 036dd000
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[d_lookup+100/220]
EFLAGS: 00010207
eax: cbfabc10 ebx: 0000006a ecx: 0000001e edx: cbf80000
esi: 00006a97 edi: c71d1009 ebp: 00000082 esp: c8e6ff08
ds: 0018 es: 0018 ss: 0018
Process crond (pid: 19158, process nr: 57, stackpage=c8e6f000)
Stack: c71d1009 0000000b cbfabc10 c71d1005 00006a97 00000003 c012d478
cbae1440
c8e6ff50 c8e6ff50 c012d6f3 cbae1440 c8e6ff50 0000000b cb9733c0
ffffffe9
00000442 bffff880 c71d1005 00000003 00006a97 c012d886 c71d1000
cbae1440
Call Trace: [cached_lookup+16/84] [lookup_dentry+275/488]
[open_namei+102/848] [filp_open+68/240] [sys_open+82/172]
[system_call+52/56]
Code: 8b 6d 00 8b 74 24 18 39 73 48 75 58 8b 74 24 24 39 73 0c 75
Warning: trailing garbage ignored on Code: line
Text: 'Code: 8b 6d 00 8b 74 24 18 39 73 48 75 58 8b 74 24 24 39 73 0c 75
'
Garbage: ' '
Code: 00000000 Before first symbol 00000000 <_IP>: <===
Code: 00000000 Before first symbol 0: 8b 6d 00
mov 0x0(%ebp),%ebp <===
Code: 00000003 Before first symbol 3: 8b 74 24 18
mov 0x18(%esp,1),%esi
Code: 00000007 Before first symbol 7: 39 73 48
cmp %esi,0x48(%ebx)
Code: 0000000a Before first symbol a: 75 58
jne 00000064 Before first symbol
Code: 0000000c Before first symbol c: 8b 74 24 24
mov 0x24(%esp,1),%esi
Code: 00000010 Before first symbol 10: 39 73 0c
cmp %esi,0xc(%ebx)
Code: 00000013 Before first symbol 13: 75 00
jne 00000015 Before first symbol
5 warnings issued. Results may not be reliable.
---------------------------------
Anyone know what this means?
I'm not familiar with ksymoops, so any suggestions or help would be much
appreciated.
This box was previously up for 6 days with light load until this occurance.
Thanks,
- Jonathan Buset
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