BUG: unable to handle kernel paging request at ffffe2000a488fd8

증상은 시스템 다운

[로그1]

Apr 29 22:12:07 localhost kernel: BUG: unable to handle kernel NULL pointer dereference at 00000000000007f8 Apr 29 22:12:07 localhost kernel: IP: [<ffffffff81071702>] unmap_vmas+0x219/0x7ae Apr 29 22:12:07 localhost kernel: PGD 13587e067 PUD 138079067 PMD 0 Apr 29 22:12:07 localhost kernel: Oops: 0000 [#1] SMP Apr 29 22:12:07 localhost kernel: last sysfs file: /sys/devices/pci0000:00/0000:00:1c.0/0000:01:00.1/irq Apr 29 22:12:07 localhost kernel: CPU 0 Apr 29 22:12:07 localhost kernel: Modules linked in: xt_length xt_tcpudp ipt_SET xt_multiport ipt_LOG xt_geoip ipt_set xt_recent ipt_REJECT ip_set_nethash ip_set_iphash ip_set iptable_filter ip_tables x_tables bridge stp llc i2c_dev i2c_core sbs sbshc battery ac sg igb button serio_raw e1000e ahci libata sd_mod scsi_mod ext3 jbd mbcache uhci_hcd ohci_hcd ehci_hcd [last unloaded: nf_conntrack] Apr 29 22:12:07 localhost kernel: Pid: 15596, comm: head Not tainted 2.6.28.10 #3 Apr 29 22:12:07 localhost kernel: RIP: 0010:[<ffffffff81071702>]  [<ffffffff81071702>] unmap_vmas+0x219/0x7ae Apr 29 22:12:07 localhost kernel: RSP: 0018:ffff8801394a5d88  EFLAGS: 00010206 Apr 29 22:12:07 localhost kernel: RAX: 00007fff36fff000 RBX: ffffe200039b0160 RCX: 0000000000000000 Apr 29 22:12:07 localhost kernel: RDX: 00000000000007f8 RSI: 0000000000000020 RDI: ffffffff813c60c0 Apr 29 22:12:07 localhost kernel: RBP: 0000000000000020 R08: ffffffff813c6128 R09: 0000000000000002 Apr 29 22:12:07 localhost kernel: R10: 0000000000000003 R11: 0000000000000286 R12: 00007fff36ffe000 Apr 29 22:12:07 localhost kernel: R13: ffff8801388d4a50 R14: 00007fff36f4b000 R15: ffff88002c026460 Apr 29 22:12:07 localhost kernel: FS:  0000000000000000(0000) GS:ffffffff81455040(0000) knlGS:0000000000000000 Apr 29 22:12:07 localhost kernel: CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b Apr 29 22:12:07 localhost kernel: CR2: 00000000000007f8 CR3: 0000000138024000 CR4: 00000000000406e0 Apr 29 22:12:07 localhost kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Apr 29 22:12:07 localhost kernel: DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Apr 29 22:12:07 localhost kernel: Process head (pid: 15596, threadinfo ffff8801394a4000, task ffff88012f5ac560) Apr 29 22:12:07 localhost kernel: Stack: Apr 29 22:12:07 localhost kernel:  ffffe20003ecb678 ffffffff81065c97 0000000000000000 ffff8801394a5e68 Apr 29 22:12:07 localhost kernel:  ffffffffffffffff 0000000000000000 ffff88013810e150 ffff8801394a5e70 Apr 29 22:12:07 localhost kernel:  00000000003628eb 0000000000000000 0000000103ecb678 00007fff36fff000 Apr 29 22:12:07 localhost kernel: Call Trace: Apr 29 22:12:07 localhost kernel:  [<ffffffff81065c97>] ? filemap_fault+0x1c2/0x347 Apr 29 22:12:07 localhost kernel:  [<ffffffff810759bc>] ? exit_mmap+0xa9/0x11e Apr 29 22:12:07 localhost kernel:  [<ffffffff8102eae9>] ? mmput+0x41/0x9a Apr 29 22:12:07 localhost kernel:  [<ffffffff810322d5>] ? exit_mm+0xf7/0x102 Apr 29 22:12:07 localhost kernel:  [<ffffffff81033851>] ? do_exit+0x1f9/0x7bd Apr 29 22:12:07 localhost kernel:  [<ffffffff81033e7b>] ? do_group_exit+0x66/0x96 Apr 29 22:12:07 localhost kernel:  [<ffffffff81033ebd>] ? sys_exit_group+0x12/0x17 Apr 29 22:12:07 localhost kernel:  [<ffffffff8100bbeb>] ? system_call_fastpath+0x16/0x1b Apr 29 22:12:07 localhost kernel: Code: 24 98 00 00 00 48 8b 54 24 58 48 ff c8 48 ff ca 48 39 c2 48 8b 84 24 98 00 00 00 48 8b 54 24 60 48 0f 42 44 24 58 48 89 44 24 58 <48> 8b 0a 48 85 c9 74 1f 48 b8 fb 0f 00 00 00 c0 ff ff 48 21 c8 Apr 29 22:12:07 localhost kernel: RIP  [<ffffffff81071702>] unmap_vmas+0x219/0x7ae Apr 29 22:12:07 localhost kernel:  RSP <ffff8801394a5d88> Apr 29 22:12:07 localhost kernel: CR2: 00000000000007f8 Apr 29 22:12:07 localhost kernel: ---[ end trace 95b8c18df01a429e ]--- Apr 29 22:12:07 localhost kernel: Fixing recursive fault but reboot is needed!

[다운될 시점 로그]

May  2 05:06:21 localhost kernel: BUG: unable to handle kernel paging request at ffffe2000a488fd8 May  2 05:06:21 localhost kernel: IP: [<ffffffff810feff4>] list_del+0x8/0x7b May  2 05:06:21 localhost kernel: PGD 2c102067 PUD 2c103067 PMD 0 May  2 05:06:21 localhost kernel: Oops: 0000 [#2] SMP