Laurent Bonnaud, could you please advise to what usage impact this crash has on using Ubuntu?
As well, the next step is to fully reverse commit bisect from kernel 3.16 to 3.18 in order to identify the last bad commit, followed immediately by the first good one. Once this commit has been identified, then it may be reviewed as a candidate for backporting into your release. Could you please do this following https://wiki.ubuntu.com/Kernel/KernelBisection#How_do_I_reverse_bisect_the_upstream_kernel.3F ? Please note, finding adjacent kernel versions is not fully commit bisecting. Thank you for your understanding. Helpful bug reporting tips: https://wiki.ubuntu.com/ReportingBugs ** Tags added: latest-bios-a19 ** Tags added: kernel-fixed-upstream kernel-fixed-upstream-3.18 needs- reverse-bisect regression-potential ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1401624 Title: kernel WARNINGs when disabling WiFi with RF kill switch on Intel chip Status in linux package in Ubuntu: Incomplete Bug description: I have a laptop with this WiFi controller: 02:00.0 Network controller: Intel Corporation Wireless 7260 (rev 6b) Subsystem: Intel Corporation Dual Band Wireless-AC 7260 Flags: bus master, fast devsel, latency 0, IRQ 47 Memory at e2d00000 (64-bit, non-prefetchable) [size=8K] Capabilities: <access denied> Kernel driver in use: iwlwifi I switched WiFi off with the RF kill switch and got those errors: [19011.796623] iwlwifi 0000:02:00.0: RF_KILL bit toggled to disable radio. [19011.797807] ------------[ cut here ]------------ [19011.797848] WARNING: CPU: 1 PID: 6870 at /build/buildd/linux-3.16.0/net/wireless/core.c:949 cfg80211_netdev_notifier_call+0x5b9/0x630 [cfg80211]() [19011.797853] Modules linked in: ses enclosure uas usb_storage dm_crypt btusb arc4 dell_wmi sparse_keymap intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel iwlmvm kvm mac80211 dell_laptop dcdbas crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd iwlwifi snd_hda_codec_hdmi joydev snd_hda_codec_idt serio_raw snd_hda_codec_generic bnep cfg80211 lpc_ich dell_smo8800 rfcomm bluetooth 6lowpan_iphc snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd mei_me mac_hid shpchp mei soundcore binfmt_misc parport_pc ppdev tpm_rng lp parport btrfs xor raid6_pq hid_generic usbhid hid i915 firewire_ohci i2c_algo_bit sdhci_pci sdhci psmouse firewire_core [19011.797964] ahci e1000e libahci drm_kms_helper drm ptp crc_itu_t pps_core wmi video [19011.797980] CPU: 1 PID: 6870 Comm: kworker/1:1 Not tainted 3.16.0-28-generic #37-Ubuntu [19011.797983] Hardware name: Dell Inc. Latitude E6520/0NVF5K, BIOS A19 11/14/2013 [19011.797999] Workqueue: events cfg80211_rfkill_sync_work [cfg80211] [19011.798003] 0000000000000009 ffff8801b3c47c28 ffffffff81781e6a 0000000000000000 [19011.798008] ffff8801b3c47c60 ffffffff8106fedd ffff88022136a8d0 ffff880035adc260 [19011.798013] 0000000000000002 ffff88022136a000 ffff880035adc000 ffff8801b3c47c70 [19011.798018] Call Trace: [19011.798030] [<ffffffff81781e6a>] dump_stack+0x45/0x56 [19011.798038] [<ffffffff8106fedd>] warn_slowpath_common+0x7d/0xa0 [19011.798044] [<ffffffff8106ffba>] warn_slowpath_null+0x1a/0x20 [19011.798060] [<ffffffffc052f629>] cfg80211_netdev_notifier_call+0x5b9/0x630 [cfg80211] [19011.798068] [<ffffffff8167acab>] ? __dev_remove_pack+0x8b/0xb0 [19011.798075] [<ffffffff81761cbc>] ? __unregister_prot_hook+0xcc/0xd0 [19011.798082] [<ffffffff8109972d>] notifier_call_chain+0x4d/0x70 [19011.798087] [<ffffffff81099856>] raw_notifier_call_chain+0x16/0x20 [19011.798093] [<ffffffff8167b4d5>] call_netdevice_notifiers_info+0x35/0x60 [19011.798099] [<ffffffff8167b878>] dev_close_many+0xc8/0x120 [19011.798105] [<ffffffff8167da46>] dev_close.part.71+0x36/0x50 [19011.798110] [<ffffffff8167da81>] dev_close+0x21/0x30 [19011.798125] [<ffffffffc052e8e5>] cfg80211_shutdown_all_interfaces+0x45/0xc0 [cfg80211] [19011.798140] [<ffffffffc052e98b>] cfg80211_rfkill_sync_work+0x2b/0x40 [cfg80211] [19011.798146] [<ffffffff8108da32>] process_one_work+0x182/0x4e0 [19011.798151] [<ffffffff8108ddfb>] worker_thread+0x6b/0x6a0 [19011.798156] [<ffffffff8108dd90>] ? process_one_work+0x4e0/0x4e0 [19011.798162] [<ffffffff81094c6b>] kthread+0xdb/0x100 [19011.798168] [<ffffffff81094b90>] ? kthread_create_on_node+0x1c0/0x1c0 [19011.798175] [<ffffffff81789dfc>] ret_from_fork+0x7c/0xb0 [19011.798181] [<ffffffff81094b90>] ? kthread_create_on_node+0x1c0/0x1c0 [19011.798184] ---[ end trace 9074ade8075c79de ]--- [19011.798187] ------------[ cut here ]------------ [19011.798210] WARNING: CPU: 1 PID: 6870 at /build/buildd/linux-3.16.0/net/mac80211/driver-ops.h:12 ieee80211_request_sched_scan_stop+0x155/0x170 [mac80211]() [19011.798213] wlan1: Failed check-sdata-in-driver check, flags: 0x0 [19011.798214] Modules linked in: ses enclosure uas usb_storage dm_crypt btusb arc4 dell_wmi sparse_keymap intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel iwlmvm kvm mac80211 dell_laptop dcdbas crct10dif_pclmul crc32_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd iwlwifi snd_hda_codec_hdmi joydev snd_hda_codec_idt serio_raw snd_hda_codec_generic bnep cfg80211 lpc_ich dell_smo8800 rfcomm bluetooth 6lowpan_iphc snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd mei_me mac_hid shpchp mei soundcore binfmt_misc parport_pc ppdev tpm_rng lp parport btrfs xor raid6_pq hid_generic usbhid hid i915 firewire_ohci i2c_algo_bit sdhci_pci sdhci psmouse firewire_core [19011.798283] ahci e1000e libahci drm_kms_helper drm ptp crc_itu_t pps_core wmi video [19011.798295] CPU: 1 PID: 6870 Comm: kworker/1:1 Tainted: G W 3.16.0-28-generic #37-Ubuntu [19011.798298] Hardware name: Dell Inc. Latitude E6520/0NVF5K, BIOS A19 11/14/2013 [19011.798312] Workqueue: events cfg80211_rfkill_sync_work [cfg80211] [19011.798314] 0000000000000009 ffff8801b3c47b58 ffffffff81781e6a ffff8801b3c47ba0 [19011.798319] ffff8801b3c47b90 ffffffff8106fedd 0000000000000000 ffff880035adc680 [19011.798326] ffff880035add3b8 00000000fffffffb ffff88022136a8c0 ffff8801b3c47bf0 [19011.798333] Call Trace: [19011.798341] [<ffffffff81781e6a>] dump_stack+0x45/0x56 [19011.798350] [<ffffffff8106fedd>] warn_slowpath_common+0x7d/0xa0 [19011.798357] [<ffffffff8106ff4c>] warn_slowpath_fmt+0x4c/0x50 [19011.798365] [<ffffffff8177e1af>] ? printk+0x63/0x6b [19011.798386] [<ffffffffc06b17d5>] ieee80211_request_sched_scan_stop+0x155/0x170 [mac80211] [19011.798412] [<ffffffffc06c0e4d>] ieee80211_sched_scan_stop+0x2d/0x40 [mac80211] [19011.798440] [<ffffffffc0538e38>] __cfg80211_stop_sched_scan+0x58/0x130 [cfg80211] [19011.798459] [<ffffffffc052f633>] cfg80211_netdev_notifier_call+0x5c3/0x630 [cfg80211] [19011.798465] [<ffffffff8167acab>] ? __dev_remove_pack+0x8b/0xb0 [19011.798471] [<ffffffff81761cbc>] ? __unregister_prot_hook+0xcc/0xd0 [19011.798477] [<ffffffff8109972d>] notifier_call_chain+0x4d/0x70 [19011.798482] [<ffffffff81099856>] raw_notifier_call_chain+0x16/0x20 [19011.798532] [<ffffffff8167b4d5>] call_netdevice_notifiers_info+0x35/0x60 [19011.798551] [<ffffffff8167b878>] dev_close_many+0xc8/0x120 [19011.798558] [<ffffffff8167da46>] dev_close.part.71+0x36/0x50 [19011.798566] [<ffffffff8167da81>] dev_close+0x21/0x30 [19011.798587] [<ffffffffc052e8e5>] cfg80211_shutdown_all_interfaces+0x45/0xc0 [cfg80211] [19011.798607] [<ffffffffc052e98b>] cfg80211_rfkill_sync_work+0x2b/0x40 [cfg80211] [19011.798614] [<ffffffff8108da32>] process_one_work+0x182/0x4e0 [19011.798620] [<ffffffff8108ddfb>] worker_thread+0x6b/0x6a0 [19011.798627] [<ffffffff8108dd90>] ? process_one_work+0x4e0/0x4e0 [19011.798634] [<ffffffff81094c6b>] kthread+0xdb/0x100 [19011.798643] [<ffffffff81094b90>] ? kthread_create_on_node+0x1c0/0x1c0 [19011.798650] [<ffffffff81789dfc>] ret_from_fork+0x7c/0xb0 [19011.798658] [<ffffffff81094b90>] ? kthread_create_on_node+0x1c0/0x1c0 [19011.798663] ---[ end trace 9074ade8075c79df ]--- ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: linux-image-3.16.0-28-generic 3.16.0-28.37 ProcVersionSignature: Ubuntu 3.16.0-28.37-generic 3.16.7-ckt1 Uname: Linux 3.16.0-28-generic x86_64 ApportVersion: 2.14.7-0ubuntu8 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: bonnaudl 3477 F.... pulseaudio CurrentDesktop: KDE Date: Thu Dec 11 18:55:50 2014 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=cf81afe7-8427-45fa-9149-c11d060a5a26 MachineType: Dell Inc. Latitude E6520 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-28-generic root=UUID=749a9901-bdd3-4b5f-b80e-69414667e058 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.16.0-28-generic N/A linux-backports-modules-3.16.0-28-generic N/A linux-firmware 1.138 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/14/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: A19 dmi.board.name: 0NVF5K dmi.board.vendor: Dell Inc. dmi.board.version: A01 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA19:bd11/14/2013:svnDellInc.:pnLatitudeE6520:pvr01:rvnDellInc.:rn0NVF5K:rvrA01:cvnDellInc.:ct9:cvr: dmi.product.name: Latitude E6520 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. 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