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[Launchpad Bug Tracker <1354690@xxxxxxxxxxxxxxxxxx>]

[Expired for linux (Ubuntu) because there has been no activity for 60
days.]

** Changed in: linux (Ubuntu)
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/1354690

Title:
  iwlwifi (Intel Centrio Ultimate-N 6300) intermittently has issues with
  ieee80211_crypto_ccmp_encrypt+0xbc/0x270

Status in “linux” package in Ubuntu:
  Expired

Bug description:
  The actual stack trace of the issue is here:

  [313819.476992] ------------[ cut here ]------------
  [313819.477052] WARNING: CPU: 0 PID: 0 at /build/buildd/linux-3.13.0/net/mac80211/wpa.c:427 ieee80211_crypto_ccmp_encrypt+0xbc/0x270 [mac80211]()
  [313819.477060] Modules linked in: ctr ccm ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp bridge stp llc ip6table_filter ip6_tables iptable_filter ip_tables ebtable_nat ebtables x_tables acpi_call(OF) pci_stub vboxpci(OF) vboxnetadp(OF) vboxnetflt(OF) vboxdrv(OF) rfcomm bnep binfmt_misc dm_crypt uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core videodev btusb bluetooth arc4 iwldvm mac80211 dm_multipath scsi_dh intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel(OF) kvm(OF) crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd snd_hda_codec_hdmi snd_hda_codec_realtek joydev serio_raw iwlwifi snd_hda_intel snd_hda_codec cfg80211 snd_hwdep lpc_ich snd_pcm thinkpad_acpi nvram snd_page_alloc mei_me mei snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd soundcore parport_pc ppdev mac_hid lp parport usb_storage hid_generic hid_logitech_dj usbhid hid e1000e i915 i2c_algo_bit psmouse drm_kms_helper ahci drm sdhci_pci libahci ptp sdhci pps_core wmi video
  [313819.477198] CPU: 0 PID: 0 Comm: swapper/0 Tainted: GF       W  O 3.13.0-32-generic #57-Ubuntu
  [313819.477202] Hardware name: LENOVO 2342CTO/2342CTO, BIOS G1ET93WW (2.53 ) 03/08/2013
  [313819.477205]  0000000000000009 ffff88021e203880 ffffffff8171bcb4 0000000000000000
  [313819.477210]  ffff88021e2038b8 ffffffff810676cd ffff880041e4f8e8 ffff880004d6ec00
  [313819.477215]  ffff88021e203a20 00000000000005c6 000000000000001a ffff88021e2038c8
  [313819.477220] Call Trace:
  [313819.477224]  <IRQ>  [<ffffffff8171bcb4>] dump_stack+0x45/0x56
  [313819.477252]  [<ffffffff810676cd>] warn_slowpath_common+0x7d/0xa0
  [313819.477257]  [<ffffffff810677aa>] warn_slowpath_null+0x1a/0x20
  [313819.477279]  [<ffffffffa050644c>] ieee80211_crypto_ccmp_encrypt+0xbc/0x270 [mac80211]
  [313819.477293]  [<ffffffffa05c837f>] ? rs_get_rate+0x8f/0x2e0 [iwldvm]
  [313819.477323]  [<ffffffffa052627a>] invoke_tx_handlers+0x14ea/0x1560 [mac80211]
  [313819.477380]  [<ffffffffa0526427>] ieee80211_tx+0x77/0xf0 [mac80211]
  [313819.477404]  [<ffffffffa052668d>] ieee80211_xmit+0x9d/0x100 [mac80211]
  [313819.477459]  [<ffffffffa052709a>] ieee80211_subif_start_xmit+0x68a/0xd70 [mac80211]
  [313819.477472]  [<ffffffff81621d38>] dev_hard_start_xmit+0x318/0x560
  [313819.477482]  [<ffffffff81640d6e>] sch_direct_xmit+0xee/0x1c0
  [313819.477496]  [<ffffffff816221b0>] __dev_queue_xmit+0x230/0x500
  [313819.477506]  [<ffffffff81622490>] dev_queue_xmit+0x10/0x20
  [313819.477515]  [<ffffffff8165aa89>] ip_finish_output+0x2c9/0x3b0
  [313819.477525]  [<ffffffff8165bed8>] ip_output+0x58/0x90
  [313819.477533]  [<ffffffff8165b635>] ip_local_out+0x25/0x30
  [313819.477538]  [<ffffffff8165b98d>] ip_queue_xmit+0x13d/0x3e0
  [313819.477548]  [<ffffffff81672749>] tcp_transmit_skb+0x469/0x8d0
  [313819.477558]  [<ffffffff81673bdc>] __tcp_retransmit_skb+0x14c/0x510
  [313819.477568]  [<ffffffff810cd536>] ? ktime_get_real+0x16/0x50
  [313819.477575]  [<ffffffff816741c9>] tcp_retransmit_skb+0x19/0x120
  [313819.477584]  [<ffffffff8167615c>] tcp_retransmit_timer+0x28c/0x730
  [313819.477593]  [<ffffffff816767b0>] ? tcp_write_timer_handler+0x1b0/0x1b0
  [313819.477600]  [<ffffffff816766a0>] tcp_write_timer_handler+0xa0/0x1b0
  [313819.477609]  [<ffffffff8167682c>] tcp_write_timer+0x7c/0x80
  [313819.477619]  [<ffffffff81074236>] call_timer_fn+0x36/0x100
  [313819.477626]  [<ffffffff816767b0>] ? tcp_write_timer_handler+0x1b0/0x1b0
  [313819.477636]  [<ffffffff810751cf>] run_timer_softirq+0x1ef/0x2f0
  [313819.477646]  [<ffffffff8106cafc>] __do_softirq+0xec/0x2c0
  [313819.477657]  [<ffffffff8106d045>] irq_exit+0x105/0x110
  [313819.477667]  [<ffffffff8172ea45>] smp_apic_timer_interrupt+0x45/0x60
  [313819.477677]  [<ffffffff8172d3dd>] apic_timer_interrupt+0x6d/0x80
  [313819.477684]  <EOI>  [<ffffffff815ceb02>] ? cpuidle_enter_state+0x52/0xc0
  [313819.477701]  [<ffffffff815cec29>] cpuidle_idle_call+0xb9/0x1f0
  [313819.477712]  [<ffffffff8101cebe>] arch_cpu_idle+0xe/0x30
  [313819.477723]  [<ffffffff810bec65>] cpu_startup_entry+0xc5/0x290
  [313819.477732]  [<ffffffff8170a187>] rest_init+0x77/0x80
  [313819.477741]  [<ffffffff81d35f70>] start_kernel+0x438/0x443
  [313819.477746]  [<ffffffff81d35941>] ? repair_env_string+0x5c/0x5c
  [313819.477756]  [<ffffffff81d35120>] ? early_idt_handlers+0x120/0x120
  [313819.477763]  [<ffffffff81d355ee>] x86_64_start_reservations+0x2a/0x2c
  [313819.477773]  [<ffffffff81d35733>] x86_64_start_kernel+0x143/0x152
  [313819.477780] ---[ end trace d26dd8b1269598a9 ]---

  
  I had to reboot before I could submit a report as when the problem occurs, internet connectivity only works for sites without SSL from my observations. Happens about every 3 days of my laptop running at constant use.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-32-generic 3.13.0-32.57 [modified: lib/modules/3.13.0-32-generic/kernel/arch/x86/kvm/kvm-amd.ko lib/modules/3.13.0-32-generic/kernel/arch/x86/kvm/kvm-intel.ko lib/modules/3.13.0-32-generic/kernel/arch/x86/kvm/kvm.ko]
  ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
  Uname: Linux 3.13.0-32-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  anthony    2950 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sat Aug  9 08:41:30 2014
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=0a661885-ed6d-4d4a-9aad-54e22250a0a2
  InstallationDate: Installed on 2013-08-16 (357 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  MachineType: LENOVO 2342CTO
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-32-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-32-generic N/A
   linux-backports-modules-3.13.0-32-generic  N/A
   linux-firmware                             1.127.5
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-04-18 (113 days ago)
  dmi.bios.date: 03/08/2013
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G1ET93WW (2.53 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2342CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrG1ET93WW(2.53):bd03/08/2013:svnLENOVO:pn2342CTO:pvrThinkPadT430:rvnLENOVO:rn2342CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2342CTO
  dmi.product.version: ThinkPad T430
  dmi.sys.vendor: LENOVO

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