server crash, need help
In the last 3 days, I had 2 server crashes, and needed to reboot to bring the server back online.
I found some logs in /var/log/messages. What does these mean? Does the ram gone bad? Thank you!
May 18 01:19:42 server kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000028
May 18 01:19:42 server kernel: printing eip:
May 18 01:19:42 server kernel: f880ed82
May 18 01:19:42 server kernel: *pde = 00000000
May 18 01:19:42 server kernel: Oops: 0000
May 18 01:19:42 server kernel: ipt_TOS iptable_mangle ip_conntrack_ftp ip_conntrack_irc ipt_REJECT ipt_LOG ipt_limit iptable_filter$
May 18 01:19:42 server kernel: CPU: 0
May 18 01:19:42 server kernel: EIP: 0060:[<f880ed82>] Not tainted
May 18 01:19:42 server kernel: EFLAGS: 00010213
May 18 01:19:42 server kernel:
May 18 01:19:42 server kernel: EIP is at journal_try_to_free_buffers_R5bcdac12 [jbd] 0x32 (2.4.20-42.9.legacy)
May 18 01:19:42 server kernel: eax: 00000000 ebx: 00000000 ecx: c1a897c8 edx: 00000000
May 18 01:19:42 server kernel: esi: ed1a35e4 edi: 00000000 ebp: 00000000 esp: c36abf28
May 18 01:19:43 server kernel: ds: 0068 es: 0068 ss: 0068
May 18 01:19:44 server kernel: Process kswapd (pid: 5, stackpage=c36ab000)
May 18 01:19:44 server kernel: Stack: ed1a35e4 c36abf3c c1390154 00000282 f188b1c8 00000001 c1a897c8 000001d0
May 18 01:19:44 server kernel: 000001d0 00000001 f88205bd c3640e80 c1a897c8 000001d0 c0149fd2 c1a897c8
May 18 01:19:44 server kernel: 000001d0 c1a897e4 c1a897c8 c013c5b9 c1a897c8 000001d0 00000001 00000357
May 18 01:19:44 server kernel: Call Trace: [<f88205bd>] ext3_releasepage [ext3] 0x2d (0xc36abf50))
May 18 01:19:44 server kernel: [<c0149fd2>] try_to_release_page [kernel] 0x52 (0xc36abf60))
May 18 01:19:44 server kernel: [<c013c5b9>] launder_page [kernel] 0x569 (0xc36abf74))
May 18 01:19:44 server kernel: [<c013d4cc>] rebalance_dirty_zone [kernel] 0x5c (0xc36abf94))
May 18 01:19:44 server kernel: [<c013d7fc>] do_try_to_free_pages_kswapd [kernel] 0xbc (0xc36abfb4))
May 18 01:19:44 server kernel: [<c013da23>] kswapd [kernel] 0x83 (0xc36abfd4))
May 18 01:19:44 server kernel: [<c013d9a0>] kswapd [kernel] 0x0 (0xc36abfe4))
May 18 01:19:44 server kernel: [<c010742d>] kernel_thread_helper [kernel] 0x5 (0xc36abff0))
May 18 01:19:44 server kernel:
May 18 01:19:44 server kernel:
May 18 01:19:44 server kernel: Code: 8b 5b 28 f6 42 19 04 75 26 39 f3 75 f1 f7 44 24 34 50 00 00
May 20 22:30:14 server kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000018
May 20 22:30:14 server kernel: printing eip:
May 20 22:30:14 server kernel: c014c0e0
May 20 22:30:14 server kernel: *pde = 00000000
May 20 22:30:14 server kernel: Oops: 0000
May 20 22:30:14 server kernel: ipt_TOS iptable_mangle ip_conntrack_ftp ip_conntrack_irc ipt_REJECT ipt_LOG ipt_limit iptable_filter
ipt_multiport ipt_state ip_conntrack ip_tables autofs 813
May 20 22:30:14 server kernel: CPU: 0
May 20 22:30:14 server kernel: EIP: 0060:[<c014c0e0>] Not tainted
May 20 22:30:14 server kernel: EFLAGS: 00010213
May 20 22:30:14 server kernel:
May 20 22:30:14 server kernel: EIP is at sync_page_buffers [kernel] 0x20 (2.4.20-42.9.legacy)
May 20 22:30:14 server kernel: eax: ffffffff ebx: 00000000 ecx: 000001d0 edx: 00000010
May 20 22:30:14 server kernel: esi: 00000007 edi: 00000002 ebp: d74da6ac esp: c36abf64
May 20 22:30:14 server kernel: ds: 0068 es: 0068 ss: 0068
May 20 22:30:14 server kernel: Process kswapd (pid: 5, stackpage=c36ab000)
May 20 22:30:14 server kernel: Stack: 00000001 00000282 d74da6ac c1a897c8 d74da6ac c1a897c8 c014c24f d74da6ac
May 20 22:30:14 server kernel: c1a897e4 c1a897c8 000001d0 00000001 c013c5b9 c1a897c8 000001d0 00000001
May 20 22:30:14 server kernel: 00000035 c0311e80 0000000a c03120b4 c013d4cc c0311e80 000001d0 c1a897c8
May 20 22:30:14 server kernel: Call Trace: [<c014c24f>] try_to_free_buffers [kernel] 0xef (0xc36abf7c))
May 20 22:30:14 server kernel: [<c013c5b9>] launder_page [kernel] 0x569 (0xc36abf94))
May 20 22:30:14 server kernel: [<c013d4cc>] rebalance_dirty_zone [kernel] 0x5c (0xc36abfb4))
May 20 22:30:14 server kernel: [<c013dafc>] kswapd [kernel] 0x15c (0xc36abfd4))
May 20 22:30:14 server kernel: [<c013d9a0>] kswapd [kernel] 0x0 (0xc36abfe4))
May 20 22:30:14 server kernel: [<c010742d>] kernel_thread_helper [kernel] 0x5 (0xc36abff0))
May 20 22:30:14 server kernel:
May 20 22:30:14 server kernel:
May 20 22:30:14 server kernel: Code: f7 43 18 06 00 00 00 74 37 0f ab 73 18 19 c0 85 c0 74 2d 0f
May 18 01:19:42 server kernel: printing eip:
May 18 01:19:42 server kernel: f880ed82
May 18 01:19:42 server kernel: *pde = 00000000
May 18 01:19:42 server kernel: Oops: 0000
May 18 01:19:42 server kernel: ipt_TOS iptable_mangle ip_conntrack_ftp ip_conntrack_irc ipt_REJECT ipt_LOG ipt_limit iptable_filter$
May 18 01:19:42 server kernel: CPU: 0
May 18 01:19:42 server kernel: EIP: 0060:[<f880ed82>] Not tainted
May 18 01:19:42 server kernel: EFLAGS: 00010213
May 18 01:19:42 server kernel:
May 18 01:19:42 server kernel: EIP is at journal_try_to_free_buffers_R5bcdac12 [jbd] 0x32 (2.4.20-42.9.legacy)
May 18 01:19:42 server kernel: eax: 00000000 ebx: 00000000 ecx: c1a897c8 edx: 00000000
May 18 01:19:42 server kernel: esi: ed1a35e4 edi: 00000000 ebp: 00000000 esp: c36abf28
May 18 01:19:43 server kernel: ds: 0068 es: 0068 ss: 0068
May 18 01:19:44 server kernel: Process kswapd (pid: 5, stackpage=c36ab000)
May 18 01:19:44 server kernel: Stack: ed1a35e4 c36abf3c c1390154 00000282 f188b1c8 00000001 c1a897c8 000001d0
May 18 01:19:44 server kernel: 000001d0 00000001 f88205bd c3640e80 c1a897c8 000001d0 c0149fd2 c1a897c8
May 18 01:19:44 server kernel: 000001d0 c1a897e4 c1a897c8 c013c5b9 c1a897c8 000001d0 00000001 00000357
May 18 01:19:44 server kernel: Call Trace: [<f88205bd>] ext3_releasepage [ext3] 0x2d (0xc36abf50))
May 18 01:19:44 server kernel: [<c0149fd2>] try_to_release_page [kernel] 0x52 (0xc36abf60))
May 18 01:19:44 server kernel: [<c013c5b9>] launder_page [kernel] 0x569 (0xc36abf74))
May 18 01:19:44 server kernel: [<c013d4cc>] rebalance_dirty_zone [kernel] 0x5c (0xc36abf94))
May 18 01:19:44 server kernel: [<c013d7fc>] do_try_to_free_pages_kswapd [kernel] 0xbc (0xc36abfb4))
May 18 01:19:44 server kernel: [<c013da23>] kswapd [kernel] 0x83 (0xc36abfd4))
May 18 01:19:44 server kernel: [<c013d9a0>] kswapd [kernel] 0x0 (0xc36abfe4))
May 18 01:19:44 server kernel: [<c010742d>] kernel_thread_helper [kernel] 0x5 (0xc36abff0))
May 18 01:19:44 server kernel:
May 18 01:19:44 server kernel:
May 18 01:19:44 server kernel: Code: 8b 5b 28 f6 42 19 04 75 26 39 f3 75 f1 f7 44 24 34 50 00 00
May 20 22:30:14 server kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000018
May 20 22:30:14 server kernel: printing eip:
May 20 22:30:14 server kernel: c014c0e0
May 20 22:30:14 server kernel: *pde = 00000000
May 20 22:30:14 server kernel: Oops: 0000
May 20 22:30:14 server kernel: ipt_TOS iptable_mangle ip_conntrack_ftp ip_conntrack_irc ipt_REJECT ipt_LOG ipt_limit iptable_filter
ipt_multiport ipt_state ip_conntrack ip_tables autofs 813
May 20 22:30:14 server kernel: CPU: 0
May 20 22:30:14 server kernel: EIP: 0060:[<c014c0e0>] Not tainted
May 20 22:30:14 server kernel: EFLAGS: 00010213
May 20 22:30:14 server kernel:
May 20 22:30:14 server kernel: EIP is at sync_page_buffers [kernel] 0x20 (2.4.20-42.9.legacy)
May 20 22:30:14 server kernel: eax: ffffffff ebx: 00000000 ecx: 000001d0 edx: 00000010
May 20 22:30:14 server kernel: esi: 00000007 edi: 00000002 ebp: d74da6ac esp: c36abf64
May 20 22:30:14 server kernel: ds: 0068 es: 0068 ss: 0068
May 20 22:30:14 server kernel: Process kswapd (pid: 5, stackpage=c36ab000)
May 20 22:30:14 server kernel: Stack: 00000001 00000282 d74da6ac c1a897c8 d74da6ac c1a897c8 c014c24f d74da6ac
May 20 22:30:14 server kernel: c1a897e4 c1a897c8 000001d0 00000001 c013c5b9 c1a897c8 000001d0 00000001
May 20 22:30:14 server kernel: 00000035 c0311e80 0000000a c03120b4 c013d4cc c0311e80 000001d0 c1a897c8
May 20 22:30:14 server kernel: Call Trace: [<c014c24f>] try_to_free_buffers [kernel] 0xef (0xc36abf7c))
May 20 22:30:14 server kernel: [<c013c5b9>] launder_page [kernel] 0x569 (0xc36abf94))
May 20 22:30:14 server kernel: [<c013d4cc>] rebalance_dirty_zone [kernel] 0x5c (0xc36abfb4))
May 20 22:30:14 server kernel: [<c013dafc>] kswapd [kernel] 0x15c (0xc36abfd4))
May 20 22:30:14 server kernel: [<c013d9a0>] kswapd [kernel] 0x0 (0xc36abfe4))
May 20 22:30:14 server kernel: [<c010742d>] kernel_thread_helper [kernel] 0x5 (0xc36abff0))
May 20 22:30:14 server kernel:
May 20 22:30:14 server kernel:
May 20 22:30:14 server kernel: Code: f7 43 18 06 00 00 00 74 37 0f ab 73 18 19 c0 85 c0 74 2d 0f
