Additional info:
reporter:       libreport-2.1.10
WARNING: at drivers/net/wireless/iwlwifi/dvm/tx.c:431 iwlagn_tx_skb+0x883/0xcd0 [iwldvm]()
Tx while agg.state = 3
Modules linked in: tcp_lp ebtable_nat nf_conntrack_netbios_ns nf_conntrack_broadcast ipt_MASQUERADE ip6table_nat nf_nat_ipv6 ip6table_mangle fuse ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 iptable_nat nf_nat_ipv4 nf_nat iptable_mangle bnep nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack bluetooth ebtable_filter ebtables ip6table_filter ip6_tables ses iTCO_wdt iTCO_vendor_support dell_wmi sparse_keymap enclosure arc4 iwldvm mac80211 dell_laptop snd_hda_codec_hdmi dcdbas acpi_cpufreq mperf coretemp snd_hda_codec_idt iwlwifi snd_hda_intel snd_hda_codec cfg80211 snd_hwdep snd_seq snd_seq_device uvcvideo snd_pcm rfkill tg3 ptp pps_core videobuf2_vmalloc videobuf2_memops snd_page_alloc snd_timer snd sdhci_pci sdhci mmc_core usb_storage shpchp r592 memstick videobuf2_core soundcore lpc_ich mfd_core microcode videodev serio_raw i2c_i801 media wmi joydev uinput binfmt_misc dm_crypt hid_logitech_dj i915 firewire_ohci firewire_core crc_itu_t i2c_algo_bit drm_kms_helper drm i2c_core video
CPU: 1 PID: 475 Comm: irq/47-iwlwifi Not tainted 3.10.11-200.fc19.x86_64 #1
Hardware name: Dell Inc. Studio 1555/0D176M, BIOS A11 03/29/2010
 0000000000000009 ffff88013fd03d10 ffffffff816396c7 ffff88013fd03d48
 ffffffff8105c221 ffff880037260900 ffff88004e5e2400 0000000000000000
 ffff8801306d31b0 ffff8801306d1810 ffff88013fd03da8 ffffffff8105c28c
Call Trace:
 <IRQ>  [<ffffffff816396c7>] dump_stack+0x19/0x1b
 [<ffffffff8105c221>] warn_slowpath_common+0x61/0x80
 [<ffffffff8105c28c>] warn_slowpath_fmt+0x4c/0x50
 [<ffffffffa04a46ee>] ? iwlagn_tx_skb+0xee/0xcd0 [iwldvm]
 [<ffffffffa04a4e83>] iwlagn_tx_skb+0x883/0xcd0 [iwldvm]
 [<ffffffffa04a22a2>] iwlagn_mac_tx+0x22/0x40 [iwldvm]
 [<ffffffffa0406f45>] __ieee80211_tx+0x125/0x350 [mac80211]
 [<ffffffffa040a6c6>] ieee80211_tx_pending+0x146/0x200 [mac80211]
 [<ffffffff810e8f51>] ? handle_irq_event_percpu+0xe1/0x1e0
 [<ffffffff810647fe>] tasklet_action+0x6e/0x110
 [<ffffffff81064997>] __do_softirq+0xf7/0x240
 [<ffffffff8164909c>] call_softirq+0x1c/0x30
 <EOI>  [<ffffffff81013355>] do_softirq+0x55/0x90
 [<ffffffff81063f54>] local_bh_enable_ip+0x94/0xa0
 [<ffffffff8163f575>] _raw_spin_unlock_bh+0x15/0x20
 [<ffffffffa04a5fff>] iwlagn_rx_reply_tx+0x28f/0xbe0 [iwldvm]
 [<ffffffffa04b04cb>] iwl_rx_dispatch+0x9b/0x120 [iwldvm]
 [<ffffffffa03580fa>] iwl_pcie_irq_handler+0x84a/0xcb0 [iwlwifi]
 [<ffffffff810e9b30>] ? irq_finalize_oneshot.part.29+0xe0/0xe0
 [<ffffffff810e9b50>] irq_thread_fn+0x20/0x50
 [<ffffffff810e9b30>] ? irq_finalize_oneshot.part.29+0xe0/0xe0
 [<ffffffff810e9e4f>] irq_thread+0x12f/0x160
 [<ffffffff810e9bd0>] ? irq_forced_thread_fn+0x50/0x50
 [<ffffffff810e9d20>] ? irq_thread_check_affinity+0x90/0x90
 [<ffffffff81080b70>] kthread+0xc0/0xd0
 [<ffffffff81080ab0>] ? insert_kthread_work+0x40/0x40
 [<ffffffff81647c2c>] ret_from_fork+0x7c/0xb0
 [<ffffffff81080ab0>] ? insert_kthread_work+0x40/0x40