BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
IP: [<ffffffff8145ea9f>] cleanup_once+0x3f/0xa0
PGD 12ec2f067 PUD 12f20e067 PMD 0
Oops: 0002 [#1] PREEMPT SMP
last sysfs file: /sys/devices/virtual/block/md1/md/mismatch_cnt
CPU 0
Pid: 0, comm: swapper Not tainted 2.6.37.1 #1 Supermicro X7SB4/E/X7SB4/E
RIP: 0010:[<ffffffff8145ea9f>]  [<ffffffff8145ea9f>] cleanup_once+0x3f/0xa0
RSP: 0018:ffff8800cfc03e40  EFLAGS: 00010206
RAX: ffff8800c9f11cd8 RBX: ffff8800c9f11cc0 RCX: 0000000000000000
RDX: 3bcb79ae0002ced7 RSI: 000000000000017b RDI: ffffffff8166ce10
RBP: 00000000000247fc R08: 00000000003d0900 R09: 000ea506dd5a0400
R10: ffffffff814f312d R11: 0000000000000010 R12: ffffffff8161ffd8
R13: 0000000000000102 R14: ffffffff8174b4e0 R15: ffffffff8161ffd8
FS:  0000000000000000(0000) GS:ffff8800cfc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000008 CR3: 000000012d94d000 CR4: 00000000000406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process swapper (pid: 0, threadinfo ffffffff8161e000, task ffffffff81638020)
Stack:
 ffff8800cfc11f00 000000013d6b69ec 00000000000247fc ffffffff8145ed68
 ffffffff8174a4c0 ffffffff8174a4c0 ffff8800cfc03eb0 ffffffff81044cb8
 ffffffff81034079 ffffffff8145ed30 0000000000000000 ffffffff8174b8e0
Call Trace:
 <IRQ>
 [<ffffffff8145ed68>] ? peer_check_expire+0x38/0x110
 [<ffffffff81044cb8>] ? run_timer_softirq+0x138/0x250
 [<ffffffff81034079>] ? scheduler_tick+0xd9/0x2e0
 [<ffffffff8145ed30>] ? peer_check_expire+0x0/0x110
 [<ffffffff8103eb0d>] ? __do_softirq+0x9d/0x130
 [<ffffffff8100320c>] ? call_softirq+0x1c/0x30
 [<ffffffff8100531d>] ? do_softirq+0x4d/0x80
 [<ffffffff8103e9cd>] ? irq_exit+0x8d/0x90
 [<ffffffff8101d5ea>] ? smp_apic_timer_interrupt+0x6a/0xa0
 [<ffffffff81002cd3>] ? apic_timer_interrupt+0x13/0x20
 <EOI>
 [<ffffffff8100a93a>] ? mwait_idle+0x6a/0x80
 [<ffffffff81001528>] ? cpu_idle+0x58/0xb0
 [<ffffffff81698dd3>] ? start_kernel+0x334/0x33f
 [<ffffffff8169840d>] ? x86_64_start_kernel+0xf3/0xf7
Code: 00 48 8b 05 84 e3 20 00 48 3d 00 ce 66 81 74 5c 48 8d 58 e8 48 8b 15 31 5e 22 00 2b 53 28 48 39 ea 72 49 48 8b 4b 18 48 8b 53 20 <48> 89 51 08 48 89 0a 48 89 43 18 48 89 43 20 f0 ff 40 14 48 c7
RIP  [<ffffffff8145ea9f>] cleanup_once+0x3f/0xa0
 RSP <ffff8800cfc03e40>
CR2: 0000000000000008
---[ end trace 9259bc3408260abc ]---
Kernel panic - not syncing: Fatal exception in interrupt
Pid: 0, comm: swapper Tainted: G      D     2.6.37.1 #1
Call Trace:
 <IRQ>  [<ffffffff814e4152>] ? panic+0xa1/0x19e
 [<ffffffff810068eb>] ? oops_end+0x9b/0xa0
 [<ffffffff81024523>] ? no_context+0x103/0x270
 [<ffffffff81024d10>] ? do_page_fault+0x290/0x430
 [<ffffffff813f2b35>] ? netif_receive_skb+0x85/0x90
 [<ffffffff813f2d2c>] ? napi_gro_complete+0xbc/0x100
 [<ffffffff814e780f>] ? page_fault+0x1f/0x30
 [<ffffffff8145ea9f>] ? cleanup_once+0x3f/0xa0
 [<ffffffff8145ed68>] ? peer_check_expire+0x38/0x110
 [<ffffffff81044cb8>] ? run_timer_softirq+0x138/0x250
 [<ffffffff81034079>] ? scheduler_tick+0xd9/0x2e0
 [<ffffffff8145ed30>] ? peer_check_expire+0x0/0x110
 [<ffffffff8103eb0d>] ? __do_softirq+0x9d/0x130
 [<ffffffff8100320c>] ? call_softirq+0x1c/0x30
 [<ffffffff8100531d>] ? do_softirq+0x4d/0x80
 [<ffffffff8103e9cd>] ? irq_exit+0x8d/0x90
 [<ffffffff8101d5ea>] ? smp_apic_timer_interrupt+0x6a/0xa0
 [<ffffffff81002cd3>] ? apic_timer_interrupt+0x13/0x20
 <EOI>  [<ffffffff8100a93a>] ? mwait_idle+0x6a/0x80
 [<ffffffff81001528>] ? cpu_idle+0x58/0xb0
 [<ffffffff81698dd3>] ? start_kernel+0x334/0x33f
 [<ffffffff8169840d>] ? x86_64_start_kernel+0xf3/0xf7