Issue

• Kernel panic with kernel NULL pointer dereference at update_cfs_shares+0x95.
• The system crashes with the following crash record in the kernel log:

BUG: unable to handle kernel NULL pointer dereference at 0000000000000058
IP: [<ffffffff81056b85>] update_cfs_shares+0x95/0x170
PGD 6000027067 PUD 6033be0067 PMD 0 
Oops: 0000 [#1] SMP 
last sysfs file: /sys/devices/pci0000:00/0000:00:02.2/0000:02:00.0/host0/target0:1:0/0:1:0:0/block/sda/dev
CPU 12 
Modules linked in: ipmi_devintf autofs4 sunrpc cpufreq_ondemand acpi_cpufreq freq_table mperf bonding 8021q garp
stp llc ipv6 microcode serio_raw ixgbe dca ptp pps_core mdio iTCO_wdt iTCO_vendor_support i2c_i801 i2c_core ses
enclosure sg tg3 ext4 mbcache jbd2 sd_mod crc_t10dif ahci isci libsas mpt2sas scsi_transport_sas raid_class wmi
dm_mirror dm_region_hash dm_log dm_mod [last unloaded: scsi_wait_scan]
Pid: 121599, comm: java Not tainted 2.6.32-358.el6.x86_64 #1 Huawei Technologies Co., Ltd. RH2288H V2-24S/BC11SRSG1
RIP: 0010:[<ffffffff81056b85>]  [<ffffffff81056b85>] update_cfs_shares+0x95/0x170
..
Process java (pid: 121599, threadinfo ffff8830062be000, task ffff88301d8eb500)
Stack:
..
Call Trace:
 [<ffffffff81065363>] dequeue_entity+0x113/0x2e0
 [<ffffffff810664da>] dequeue_task_fair+0x6a/0x130
 [<ffffffff81055ebe>] dequeue_task+0x8e/0xb0
 [<ffffffff81055f03>] deactivate_task+0x23/0x30
 [<ffffffff8150d7b9>] thread_return+0x127/0x76e
 [<ffffffff810e6d0e>] ? call_rcu+0xe/0x10
 [<ffffffff8107196f>] ? release_task+0x33f/0x4b0
 [<ffffffff81073837>] do_exit+0x5b7/0x870
 [<ffffffff81073b48>] do_group_exit+0x58/0xd0
 [<ffffffff81088e16>] get_signal_to_deliver+0x1f6/0x460
 [<ffffffff8100a265>] do_signal+0x75/0x800
 [<ffffffff8100988e>] ? __switch_to+0x26e/0x320
 [<ffffffff8150d6e0>] ? thread_return+0x4e/0x76e
 [<ffffffff810ace0b>] ? sys_futex+0x7b/0x170
 [<ffffffff8100aa80>] do_notify_resume+0x90/0xc0
 [<ffffffff8100b341>] int_signal+0x12/0x17