메시지의 정체

시스템에서 아래와 같은 메시지가 주기적으로 올라옵니다...대체 무슨 의미인지, 왜 그런것인지..답답할 뿐입니다. 도와주세요.

Jan 26 04:02:13 :  <1>BUG: unable to handle kernel NULL pointer dereference at virtual address 00000005
Jan 26 04:02:13 :  printing eip:
Jan 26 04:02:13 : c01c18b3
Jan 26 04:02:13 : *pde = 00000000
Jan 26 04:02:13 : Oops: 0000 [#90]
Jan 26 04:02:13 : SMP
Jan 26 04:02:13 : Modules linked in: ipt_MASQUERADE ipt_REDIRECT xt_state xt_multiport xt_tcpudp iptable_nat ip_n
at ip_conntrack nfnetlink iptable_filter ip_tables x_tables tun ipv6 autofs4 tulip 8139too mii ide_cd cdrom sg uhci_hcd ehci_hcd pii
x generic ata_piix libata sd_mod scsi_mod
Jan 26 04:02:13 : CPU:    0
Jan 26 04:02:13 : EIP:    0060:[<c01c18b3>]    Not tainted VLI
Jan 26 04:02:13 : EFLAGS: 00010002   (2.6.18.6 #1)
Jan 26 04:02:13 : EIP is at radix_tree_lookup+0x2e/0x55
Jan 26 04:02:13 : eax: 00000005   ebx: 00000001   ecx: 7ffffff4   edx: 7fffffee
Jan 26 04:02:13 : esi: 00000000   edi: 3ffffffe   ebp: 00000000   esp: ecab9d8c
Jan 26 04:02:14 : ds: 007b   es: 007b   ss: 0068
Jan 26 04:02:14 : Process prelink (pid: 25461, ti=ecab8000 task=c4ec3a90 task.ti=ecab8000)
Jan 26 04:02:14 : Stack: 00000000 00000000 f728ad50 c013de84 00000000 00000005 00000000 ebe63b00
Jan 26 04:02:14 :        ecab9dac ecab9dac ecab9e40 f728ad50 00000000 ebe63b00 c013e01a 00000004
Jan 26 04:02:14 :        ecab9e40 00000000 00000001 ebe63b00 c013e18b 00000004 ecab9e40 00000001
Jan 26 04:02:14 : Call Trace:
Jan 26 04:02:14 :  [<c013de84>] __do_page_cache_readahead+0x8b/0x12f
Jan 26 04:02:14 :  [<c013e01a>] blockable_page_cache_readahead+0x46/0x96
Jan 26 04:02:14 :  [<c013e18b>] page_cache_readahead+0x83/0x13a
Jan 26 04:02:14 :  [<c0138d3f>] do_generic_mapping_read+0x11f/0x3d5
Jan 26 04:02:14 :  [<c0139250>] __generic_file_aio_read+0x192/0x1c3
Jan 26 04:02:14 :  [<c0138ff5>] file_read_actor+0x0/0xc9
Jan 26 04:02:14 :  [<c01392c1>] generic_file_aio_read+0x40/0x47
Jan 26 04:02:14 :  [<c0152705>] do_sync_read+0xb9/0xf7
Jan 26 04:02:14 :  [<c015f52d>] may_open+0x52/0x204
Jan 26 04:02:14 :  [<c01276aa>] autoremove_wake_function+0x0/0x2d
Jan 26 04:02:14 :  [<c015aa5c>] sys_lstat64+0x1e/0x23
Jan 26 04:02:14 :  [<c01527ed>] vfs_read+0xaa/0x14e
Jan 26 04:02:14 :  [<c0152b15>] sys_read+0x3c/0x62
Jan 26 04:02:15 :  [<c0103213>] syscall_call+0x7/0xb
Jan 26 04:02:15 : Code: d6 53 89 c3 8b 38 3b 14 bd ac 7f 38 c0 77 3d 85 ff 75 0b 83 78 08 00 74 05 8d 40 08 eb 26
 6b c7 06 85 ff 8d 50 fa 8d 43 08 74 19 <8b> 18 85 db 74 1b 89 d1 89 f0 83 ea 06 d3 e8 83 e0 3f 4f 8d 44
Jan 26 04:02:15 : EIP: [<c01c18b3>] radix_tree_lookup+0x2e/0x55 SS:ESP 0068:ecab9d8c
Jan 26 08:41:06 :  <3>swap_free: Bad swap offset entry 00800000