Description of problem:
Random kernel oops with latest kernel:
2.6.32-220.2.1.el6.x86_64 #1 SMP
Happens every few days, has caused a sstem hang already.

Version-Release number of selected component (if applicable):
2.6.32-220.2.1.el6.x86_64 #1 SMP

How reproducible: random


Steps to Reproduce: NA
  
Actual results:
------------[ cut here ]------------
WARNING: at kernel/sched.c:5914 thread_return+0x232/0x79d() (Not tainted)
Hardware name:         
Modules linked in: ipt_REDIRECT xt_conntrack iptable_mangle nf_conntrack_ftp ipt_LOG xt_limit xt_multiport iptable_nat nf_nat cpufreq_ondemand acpi_cpufreq freq_table mperf ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4 iptable_filter ip_tables ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables ipv6 microcode i2c_i801 sg iTCO_wdt iTCO_vendor_support e1000e ext4 mbcache jbd2 sd_mod crc_t10dif ahci i915 drm_kms_helper drm i2c_algo_bit i2c_core video output dm_mirror dm_region_hash dm_log dm_mod [last unloaded: scsi_wait_scan]
Pid: 1371, comm: kondemand/7 Not tainted 2.6.32-220.2.1.el6.x86_64 #1
Call Trace:
 [<ffffffff81069997>] ? warn_slowpath_common+0x87/0xc0
 [<ffffffff810699ea>] ? warn_slowpath_null+0x1a/0x20
 [<ffffffff814eccc5>] ? thread_return+0x232/0x79d
 [<ffffffffa031b1cc>] ? do_dbs_timer+0x28c/0x384 [cpufreq_ondemand]
 [<ffffffffa031af40>] ? do_dbs_timer+0x0/0x384 [cpufreq_ondemand]
 [<ffffffff8108b15c>] ? worker_thread+0x1fc/0x2a0
 [<ffffffff81090a10>] ? autoremove_wake_function+0x0/0x40
 [<ffffffff8108af60>] ? worker_thread+0x0/0x2a0
 [<ffffffff810906a6>] ? kthread+0x96/0xa0
 [<ffffffff8100c14a>] ? child_rip+0xa/0x20
 [<ffffffff81090610>] ? kthread+0x0/0xa0
 [<ffffffff8100c140>] ? child_rip+0x0/0x20
---[ end trace 8dc13bfd9675045e ]---
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