Description of problem:
Laptop is connected via eth0. Wireless is turned on. When attempt to connect
secured wifi network is done - kernel crash shows up.
Connection via eth0 is not interrupted.  
When the laptop is disconnected from eth0, attempt to connect secured wifi is
done without errors. With kernel kernel 2.6.32-217.el6.x86_64 is also 
done without errors.

Version-Release number of selected component (if applicable):
kernel 2.6.32-220.el6.x86_64

How reproducible:
Always

Steps to Reproduce:
1.Be connected with eth0, have wifi turned on
2.Have some secured wifi networks available
3.Try to connect to one of secured wifi network

Actual results:
Kernel crash shows up

Expected results:
Laptop is connected via wifi

Additional info:
Wifi adapter : Intel Corporation Centrino Ultimate-N 6300
Laptop : Lenovo T520
Dock station : Lenovo 4337

Trace:
kernel: WARNING: at net/wireless/mlme.c:300 __cfg80211_auth_remove+0x6f/0xf0 [cfg80211]() (Not tainted)
kernel: Hardware name: 4243BQ9
kernel: Modules linked in: ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat xt_CHECKSUM iptable_mangle rfcomm sco bridge stp llc bnep l2cap autofs4 sunrpc 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 be2iscsi iscsi_boot_sysfs bnx2i cnic uio cxgb4i cxgb4 cxgb3i libcxgbi cxgb3 mdio ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr ipv6 iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi fuse ext2 vhost_net macvtap macvlan tun kvm_intel kvm uinput thinkpad_acpi arc4 ecb iwlagn iwlcore mac80211 cfg80211 sg btusb bluetooth rfkill uvcvideo videodev v4l2_compat_ioctl32 microcode i2c_i801 iTCO_wdt iTCO_vendor_support shpchp snd_hda_codec_hdmi snd_hda_codec_conexant snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm snd_timer snd soundcore snd_page_alloc e1000e ext4 mbcache jbd2 sr_mod cdrom sd_mod crc_t1
kernel: 0dif firewire_ohci firewire_core crc_itu_t ahci wmi 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]
kernel: Pid: 1248, comm: phy0 Not tainted 2.6.32-220.2.1.el6.x86_64 #1
kernel: Call Trace:
kernel: [<ffffffff81069997>] ? warn_slowpath_common+0x87/0xc0
kernel: [<ffffffff810699ea>] ? warn_slowpath_null+0x1a/0x20
kernel: [<ffffffffa037025f>] ? __cfg80211_auth_remove+0x6f/0xf0 [cfg80211]
kernel: [<ffffffffa0370371>] ? cfg80211_send_auth_timeout+0x71/0xd0 [cfg80211]
kernel: [<ffffffff8108bf21>] ? queue_delayed_work+0x21/0x40
kernel: [<ffffffffa039b93c>] ? ieee80211_sta_work+0x5fc/0x10d0 [mac80211]
kernel: [<ffffffffa039466e>] ? __ieee80211_start_scan+0xce/0x310 [mac80211]
kernel: [<ffffffffa039b340>] ? ieee80211_sta_work+0x0/0x10d0 [mac80211]
kernel: [<ffffffff8108b0d0>] ? worker_thread+0x170/0x2a0
kernel: [<ffffffff81090a10>] ? autoremove_wake_function+0x0/0x40
kernel: [<ffffffff8108af60>] ? worker_thread+0x0/0x2a0
kernel: [<ffffffff810906a6>] ? kthread+0x96/0xa0
kernel: [<ffffffff8100c14a>] ? child_rip+0xa/0x20
kernel: [<ffffffff81090610>] ? kthread+0x0/0xa0
kernel: [<ffffffff8100c140>] ? child_rip+0x0/0x20