Additional info:
reporter:       libreport-2.3.0
WARNING: CPU: 1 PID: 28768 at drivers/net/wireless/iwlwifi/dvm/sta.c:580 iwl_deactivate_station+0x143/0x1c0 [iwldvm]()
Modules linked in: rfcomm btusb ccm xt_CHECKSUM ipt_MASQUERADE tun bnep bluetooth fuse nf_conntrack_netbios_ns nf_conntrack_broadcast ip6t_rpfilter ip6t_REJECT xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw dm_crypt qcserial usb_wwan coretemp kvm_intel snd_hda_codec_conexant snd_hda_codec_generic iTCO_wdt snd_hda_intel iTCO_vendor_support arc4 snd_hda_controller iwldvm kvm mac80211 snd_hda_codec snd_hwdep snd_seq iwlwifi snd_seq_device snd_pcm lpc_ich cfg80211 serio_raw i2c_i801 mfd_core thinkpad_acpi shpchp
 snd_timer snd wmi mei_me soundcore tpm_tis mei rfkill tpm acpi_cpufreq i915 e1000e i2c_algo_bit drm_kms_helper drm ptp pps_core video
CPU: 1 PID: 28768 Comm: kworker/u8:72 Not tainted 3.17.3-300.fc21.x86_64 #1
Hardware name: LENOVO 7458WCC/7458WCC, BIOS 6DET71WW (3.21 ) 12/13/2011
Workqueue: phy0 ieee80211_iface_work [mac80211]
 0000000000000000 000000005af863a1 ffff88012728fb58 ffffffff8173f509
 0000000000000000 ffff88012728fb90 ffffffff810970ad ffff88022eb99a88
 00000000000000ff 00000000000000ff 00000000000000ff ffff88022ebe9358
Call Trace:
 [<ffffffff8173f509>] dump_stack+0x45/0x56
 [<ffffffff810970ad>] warn_slowpath_common+0x7d/0xa0
 [<ffffffff810971da>] warn_slowpath_null+0x1a/0x20
 [<ffffffffa04db063>] iwl_deactivate_station+0x143/0x1c0 [iwldvm]
 [<ffffffffa04d133c>] iwlagn_mac_sta_state+0x1bc/0x320 [iwldvm]
 [<ffffffffa0373456>] __sta_info_destroy_part2+0x196/0x2a0 [mac80211]
 [<ffffffffa037358a>] __sta_info_destroy+0x2a/0x40 [mac80211]
 [<ffffffffa03735d8>] sta_info_destroy_addr+0x38/0x60 [mac80211]
 [<ffffffffa03b0a68>] ieee80211_destroy_auth_data+0x28/0xb0 [mac80211]
 [<ffffffffa03b56da>] ieee80211_sta_work+0x4ca/0x1170 [mac80211]
 [<ffffffff810cc337>] ? dequeue_entity+0x117/0x610
 [<ffffffff8101dabe>] ? native_sched_clock+0x2e/0xa0
 [<ffffffff810cd9e1>] ? put_prev_entity+0x31/0x400
 [<ffffffff810c861f>] ? set_next_entity+0x5f/0x80
 [<ffffffffa0381119>] ieee80211_iface_work+0x379/0x420 [mac80211]
 [<ffffffff810ad5dd>] ? pwq_activate_delayed_work+0x3d/0x80
 [<ffffffff810af88d>] process_one_work+0x14d/0x400
 [<ffffffff810b021b>] worker_thread+0x6b/0x4a0
 [<ffffffff810b01b0>] ? rescuer_thread+0x2a0/0x2a0
 [<ffffffff810b52fa>] kthread+0xea/0x100
 [<ffffffff810b5210>] ? kthread_create_on_node+0x1a0/0x1a0
 [<ffffffff817465fc>] ret_from_fork+0x7c/0xb0
 [<ffffffff810b5210>] ? kthread_create_on_node+0x1a0/0x1a0

Potential duplicate: bug 1167513