Exception in __wake_up_common+0x50

Issue

• Server rebooted automatically without any manual intervention
• System panicked with this stack trace:

Unable to handle kernel NULL pointer dereference at 0000000000000000 RIP: 
 [<ffffffff8006548f>] do_general_protection+0xe/0x107
PGD 0 
Oops: 0000 [1] SMP 
last sysfs file: /devices/system/cpu/cpu31/topology/thread_siblings
CPU 15 
Modules linked in: nfs nfs_acl lockd sunrpc bonding be2iscsi ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp bnx2i cnic ipv6 xfrm_nalgo crypto_api uio cxgb3i libcxgbi cxgb3 libiscsi_tcp libiscsi2 scsi_transport_iscsi2 scsi_transport_iscsi ext3 jbd dm_multipath scsi_dh video backlight sbs power_meter hwmon i2c_ec dell_wmi wmi button battery asus_acpi acpi_memhotplug ac parport_pc lp parport joydev nvidia(PU) shpchp tpm_tis tpm hpilo tpm_bios serio_raw igb i2c_core 8021q dca hpwdt(U) pcspkr dm_raid45 dm_message dm_region_hash dm_mem_cache dm_snapshot dm_zero dm_mirror dm_log dm_mod usb_storage ahci libata cciss mpt2sas scsi_transport_sas sd_mod scsi_mod ext4 jbd2 crc16 uhci_hcd ohci_hcd ehci_hcd
Pid: 0, comm: swapper Tainted: P     ---- 2.6.18-308.el5 #1
RIP: 0010:[<ffffffff8006548f>]  [<ffffffff8006548f>] do_general_protection+0xe/0x107
RSP: 0018:ffff81011df7bd88  EFLAGS: 00010086
RAX: ffffffff80065481 RBX: ffff81011df7bdc8 RCX: 00000000000003e8
RDX: 000000000000006e RSI: 0000000000000000 RDI: ffff81011df7bdc8
RBP: 000000008005d67c R08: 00036a52c5950498 R09: ffff81011df75e38
R10: 0000000000000001 R11: ffff81107fc87440 R12: 0000000000000000
R13: ffff81087f8ca700 R14: ffff81107f89d2f0 R15: ffff81089c15d1a0
FS:  0000000000000000(0000) GS:ffff81089c36d0c0(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 0000000000000000 CR3: 0000000000201000 CR4: 00000000000006a0
Process swapper (pid: 0, threadinfo ffff81011df74000, task ffff81089c36e100)
Stack:  ffff81089c15d1a0 ffff81011df7bdc0 ffffffff8008e621 0000000000000003
 0000000000000001 000000008005d67c 000000000000000f ffffffff8005dde9
 ffff81089c15d1a0 ffff81107f89d2f0 ffff81087f8ca700 000000000000000f
Call Trace:
 <IRQ>  [<ffffffff8008e621>] task_rq_lock+0x3d/0x6f
 [<ffffffff8005dde9>] error_exit+0x0/0x84
 [<ffffffff8008d2a9>] __wake_up_common+0x50/0x68
 [<ffffffff8002df0f>] __wake_up+0x38/0x4f
 [<ffffffff8008fa8e>] rebalance_tick+0x183/0x3cd
 [<ffffffff800a0156>] delayed_work_timer_fn+0x0/0x34
 [<ffffffff800a0146>] __queue_work+0x49/0x59
 [<ffffffff8009a18f>] run_timer_softirq+0x18d/0x23a
 [<ffffffff80012551>] __do_softirq+0x89/0x133
 [<ffffffff8005e2fc>] call_softirq+0x1c/0x28
 [<ffffffff8006d646>] do_softirq+0x2c/0x7d
 [<ffffffff80056c59>] mwait_idle+0x0/0x20
 [<ffffffff8005dc8e>] apic_timer_interrupt+0x66/0x6c
 <EOI>  [<ffffffff8006b9cf>] mwait_idle_with_hints+0x66/0x67
 [<ffffffff80056c65>] mwait_idle+0xc/0x20
 [<ffffffff80048f92>] cpu_idle+0x95/0xb8
 [<ffffffff80078ae2>] start_secondary+0x479/0x488


Code: 65 48 8b 2c 25 00 00 00 00 f6 87 91 00 00 00 02 74 01 fb 4c 
RIP  [<ffffffff8006548f>] do_general_protection+0xe/0x107
 RSP <ffff81011df7bd88>