Issue

BUG: unable to handle kernel NULL pointer dereference at 0000000000000011
IP: [<ffffffff8127de60>] rb_erase+0x1e0/0x310
PGD 70f416067 PUD 70f40f067 PMD 0 
Oops: 0000 [#1] SMP 
last sysfs file: /sys/devices/pci0000:40/0000:40:03.0/0000:42:00.0/host3/rport-3:0-0/target3:0:0/3:0:0:18/state
CPU 23 
Modules linked in: oracleacfs(P)(U) oracleadvm(P)(U) oracleoks(P)(U) hangcheck_timer mpt2sas raid_class mptctl ipmi_devintf dell_rbu nfs lockd fscache auth_rpcgss nfs_acl sunrpc bonding 8021q garp stp llc dcdbas microcode power_meter sg shpchp sb_edac edac_core iTCO_wdt iTCO_vendor_support ext4 jbd2 mbcache dm_round_robin sr_mod cdrom ahci sd_mod crc_t10dif wmi bnx2x libcrc32c dm_multipath dm_mirror dm_region_hash dm_log dm_mod be2iscsi bnx2i cnic uio ipv6 cxgb4i cxgb4 cxgb3i libcxgbi cxgb3 mdio libiscsi_tcp qla4xxx iscsi_boot_sysfs libiscsi scsi_transport_iscsi qla2xxx scsi_transport_fc scsi_tgt mptsas mptscsih mptbase scsi_transport_sas megaraid_sas [last unloaded: scsi_wait_scan]

Pid: 0, comm: swapper Tainted: P        W  ---------------    2.6.32-358.28.1.el6.x86_64 #1 Dell Inc. PowerEdge R620/0PXXHP
RIP: 0010:[<ffffffff8127de60>]  [<ffffffff8127de60>] rb_erase+0x1e0/0x310
RSP: 0018:ffff88305b0dfd98  EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff883055f7c0c8 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffff8818d4976798 RDI: ffff883055f7c0c8
RBP: ffff88305b0dfda8 R08: 0000000000000001 R09: 00002140322a0a90
R10: 000021403247031a R11: 0000000000000001 R12: ffff8818d4976798
R13: ffff883055f7c0b8 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8818d4960000(0000) knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 0000000000000011 CR3: 000000073dfac000 CR4: 00000000000407e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process swapper (pid: 0, threadinfo ffff88305b0de000, task ffff88185b062ae0)
Stack:
 ffff883055f7c0c8 ffff8818d4976768 ffff88305b0dfdc8 ffffffff81057520
<d> ffff883055f7c0b8 ffff8818d4976768 ffff88305b0dfde8 ffffffff81064c40
<d> ffff8818d4976768 ffff883055f7c0b8 ffff88305b0dfe38 ffffffff81064d03
Call Trace:
 [<ffffffff81057520>] __dequeue_entity+0x30/0x50
 [<ffffffff81064c40>] set_next_entity+0x90/0xa0
 [<ffffffff81064d03>] pick_next_task_fair+0x63/0x130
 [<ffffffff8150def8>] schedule+0x178/0x3b2
 [<ffffffff8109bf04>] ? hrtimer_start_range_ns+0x14/0x20
 [<ffffffff81009ffe>] cpu_idle+0xee/0x110
 [<ffffffff815075e0>] start_secondary+0x2ac/0x2ef
Code: 08 01 e8 c4 fb ff ff 49 8b 04 24 48 85 c0 0f 84 eb fe ff ff 48 8b 10 48 83 ca 01 48 89 10 5b 41 5c c9 c3 0f 1f 84 00 00 00 00 00 <4c> 8b 07 48 8b 47 08 4c 89 c2 41 83 e0 01 48 83 e2 fc 48 85 c0 
RIP  [<ffffffff8127de60>] rb_erase+0x1e0/0x310
 RSP <ffff88305b0dfd98>
CR2: 0000000000000011