Kernel panic: paging oops around nf_conntrack

Issue

• Our customer encountered a kernel panic. Could you please investigate the cause?

2014-06-02 07:33:34 Call Trace:
2014-06-02 07:33:34  <IRQ> 
2014-06-02 07:33:34  [<ffffffffa030d8f6>] ? nf_ct_helper_destroy+0x36/0x40 [nf_conntrack]
2014-06-02 07:33:34  [<ffffffffa0309efb>] nf_ct_delete_from_lists+0x1b/0xd0 [nf_conntrack]
2014-06-02 07:33:34  [<ffffffffa030a01d>] death_by_timeout+0x6d/0x160 [nf_conntrack]
2014-06-02 07:33:34  [<ffffffff81081937>] run_timer_softirq+0x197/0x340
2014-06-02 07:33:34  [<ffffffff810a8060>] ? tick_sched_timer+0x0/0xc0
2014-06-02 07:33:34  [<ffffffff8102ea2d>] ? lapic_next_event+0x1d/0x30
2014-06-02 07:33:34  [<ffffffff810770b1>] __do_softirq+0xc1/0x1e0
2014-06-02 07:33:34  [<ffffffff8109b87b>] ? hrtimer_interrupt+0x14b/0x260
2014-06-02 07:33:34  [<ffffffff8100c1cc>] call_softirq+0x1c/0x30
2014-06-02 07:33:34  [<ffffffff8100de05>] do_softirq+0x65/0xa0
2014-06-02 07:33:34  [<ffffffff81076e95>] irq_exit+0x85/0x90
2014-06-02 07:33:34  [<ffffffff81517860>] smp_apic_timer_interrupt+0x70/0x9b
2014-06-02 07:33:34  [<ffffffff8100bb93>] apic_timer_interrupt+0x13/0x20
2014-06-02 07:33:34  <EOI> 
2014-06-02 07:33:34  [<ffffffff812d3cfe>] ? intel_idle+0xde/0x170
2014-06-02 07:33:34  [<ffffffff812d3ce1>] ? intel_idle+0xc1/0x170
2014-06-02 07:33:34  [<ffffffff81415647>] cpuidle_idle_call+0xa7/0x140
2014-06-02 07:33:34  [<ffffffff81009fc6>] cpu_idle+0xb6/0x110
2014-06-02 07:33:34  [<ffffffff81507600>] start_secondary+0x2ac/0x2ef
2014-06-02 07:33:34 Code:  Bad RIP value.