Re: Unable to handle kernel paging request at virtual address f8c7a7e8

Re: Unable to handle kernel paging request at virtual address f8c7a7e8

[James Zheng]

I got the error in "/var/log/message" after I installed the ipvsadmin 
under the Centos 4.7,  and the server is down.


Do you know  how to fix the bug?


Many thanks.


Kernel：2.6.9-78.0.5.ELsmp

Ipvadmin: 1.24-6


This is LOG:

Nov 20 22:24:50 cd03 iptables: succeeded
Nov 20 22:24:50 cd03 iptables: succeeded
Nov 20 22:24:52 cd03 kernel: Unable to handle kernel paging request at 
virtual address f8c7a7e8
Nov 20 22:24:52 cd03 kernel: printing eip:
Nov 20 22:24:52 cd03 kernel: c0294afa
Nov 20 22:24:52 cd03 kernel: *pde = f5e93558
Nov 20 22:24:52 cd03 kernel: Oops: 0000 [#1]
Nov 20 22:24:52 cd03 kernel: SMP
Nov 20 22:24:52 cd03 kernel: Modules linked in: ip_vs_rr ip_vs ip_tables 
parport_pc lp parport autofs4 i2c_dev i2c_core sunrpc md5 ipv6 
cpufreq_powersave loo
p button battery ac ohci_hcd tg3 floppy sg dm_snapshot dm_zero dm_mirror 
ext3 jbd dm_mod mptscsih mptsas mptspi mptscsi mptbase sd_mod scsi_mod
Nov 20 22:24:52 cd03 kernel: CPU: 3
Nov 20 22:24:52 cd03 kernel: EIP: 0060:[] Not tainted VLI
Nov 20 22:24:52 cd03 kernel: EFLAGS: 00010212 (2.6.9-78.0.5.ELsmp)
Nov 20 22:24:52 cd03 kernel: EIP is at nf_unregister_sockopt+0x48/0x83
Nov 20 22:24:52 cd03 kernel: eax: 00000002 ebx: c035e784 ecx: f6c2a540 
edx: f8c7a7e0
Nov 20 22:24:52 cd03 kernel: esi: f89355e0 edi: 00000000 ebp: f6382000 
esp: f6382f5c
Nov 20 22:24:52 cd03 kernel: ds: 007b es: 007b ss: 0068
Nov 20 22:24:52 cd03 kernel: Process modprobe (pid: 18385, 
threadinfo=f6382000 task=e4e413b0)
Nov 20 22:24:52 cd03 kernel: Stack: 00000000 c0337ba8 f8933865 f8935700 
c01373ce 00000000 745f7069 656c6261
Nov 20 22:24:52 cd03 kernel: f5250073 c0151ec2 f525c6c4 d53bfa6c 
c01521f2 b7fad000 b7fae000 b7fae000
Nov 20 22:24:52 cd03 kernel: b7fae000 d27bc4ec f525c680 f525c6b0 
00000000 f6382000 082ac828 00000000
Nov 20 22:24:52 cd03 kernel: Call Trace:
Nov 20 22:24:52 cd03 kernel: [] fini+0xd/0x35 [ip_tables]
Nov 20 22:24:52 cd03 kernel: [] sys_delete_module+0x13b/0x184
Nov 20 22:24:52 cd03 kernel: [] unmap_vma_list+0xe/0x17
Nov 20 22:24:52 cd03 kernel: [] do_munmap+0x108/0x116
Nov 20 22:24:52 cd03 kernel: [] syscall_call+0x7/0xb
Nov 20 22:24:52 cd03 kernel: Code: 04 00 89 d9 f0 ff 0d 84 e7 35 c0 0f 
88 93 0c 00 00 8b 0d 9c e7 35 c0 8b 01 0f 18 00 90 81 f9 9c e7 35 c0 74 
2f 8b 51 08 8b
46 08 42 08 8b 11 75 1e 8b 41 04 89 42 04 89 10 89 c8 c7 01 00 01
Nov 20 22:24:52 cd03 kernel: Fatal exception: panic in 5 seconds

CPU: Intel(R) Xeon(TM) CPU 2.80GHz *2
Mem： 4G

Thanks.

Re: Unable to handle kernel paging request at virtual address f8c7a7e8

[Graeme Fowler]

On Fri, 2008-11-21 at 09:33 +0800, James Zheng wrote:
> I got the error in "/var/log/message" after I installed the ipvsadmin 
> under the Centos 4.7,  and the server is down.

More than likely not related to IPVS, but to iptables.

> Do you know  how to fix the bug?

See this thread:

https://bugzilla.redhat.com/show_bug.cgi?id=456664

The error you posted shows that it happened when modprobe was trying to
unload a module. It may be a related issue to that bugzilla entry. My
advice would be to drop back to a previous kernel until the fix is
released.

Graeme