I have the same issue with the current Ubuntu 18.04 kernel 4.15.0-23-generic, and also with ubuntu mainline kernel 4.17.0-041700, using Intel Wireless 8260 (Firmware 34.0.1) in AP mode.
Not sure if this is relevant or not: if i reboot the system, the wifi card vanishes completely (even from lspci), i always have to shut down and press the power button instead. ------ BUG: unable to handle kernel NULL pointer dereference at 0000000000000068 IP: iwl_trans_pcie_txq_enable+0x62/0x460 [iwlwifi] PGD 0 P4D 0 Oops: 0002 [#1] SMP PTI Modules linked in: ccm bridge stp llc pppoe pppox nf_conntrack_ipv6 nf_defrag_ipv6 ip6t_rt ip6table_filter ip6_tables nf_log_ipv4 nf_log_common xt_LOG ipt_REJECT nf_reject_ipv4 xt_policy xt_multiport xt_conntrack iptable_filter bnep ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack libcrc32c xt_TCPMSS xt_tcpudp iptable_mangle nls_iso8859_1 snd_soc_skl snd_soc_skl_ipc snd_hda_ext_core intel_rapl snd_soc_sst_dsp intel_telemetry_pltdrv snd_soc_sst_ipc intel_punit_ipc snd_soc_acpi intel_telemetry_core intel_pmc_ipc snd_soc_core x86_pkg_temp_thermal arc4 intel_powerclamp coretemp kvm_intel snd_compress ac97_bus kvm snd_hda_codec_hdmi irqbypass snd_hda_codec_realtek crct10dif_pclmul snd_hda_codec_generic crc32_pclmul ghash_clmulni_intel snd_pcm_dmaengine pcbc snd_hda_intel snd_hda_codec snd_hda_core iwlmvm snd_hwdep mac80211 aesni_intel aes_x86_64 crypto_simd glue_helper cryptd intel_cstate intel_rapl_perf iwlwifi snd_pcm btusb btrtl btbcm btintel serio_raw bluetooth snd_seq_midi snd_seq_midi_event ecdh_generic cfg80211 snd_rawmidi lpc_ich snd_seq snd_seq_device snd_timer snd mei_me mei mac_hid soundcore shpchp sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 uas usb_storage i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops psmouse sdhci_pci drm sdhci r8169 ahci mii libahci i2c_hid hid video pinctrl_broxton CPU: 3 PID: 5529 Comm: kworker/3:0 Not tainted 4.15.0-23-generic #25-Ubuntu Hardware name: NA ZBOX-CI327NANO-GS-01/ZBOX-CI327NANO-GS-01, BIOS 5.12 01/16/2018 Workqueue: events iwl_mvm_add_new_dqa_stream_wk [iwlmvm] RIP: 0010:iwl_trans_pcie_txq_enable+0x62/0x460 [iwlwifi] RSP: 0018:ffffa38b41577c10 EFLAGS: 00010246 RAX: 00000000000009c4 RBX: 000000000000001f RCX: 0000000000000000 RDX: 0000000000000000 RSI: 000000000000001f RDI: 0000000000002710 RBP: ffffa38b41577c60 R08: 0000000000002710 R09: 0000000000000001 R10: 0000000000000000 R11: ffff8d6db6399fd0 R12: 0000000000000000 R13: ffff8d6db5aa0018 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8d6dbfd80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000068 CR3: 0000000136e0a000 CR4: 00000000003406e0 Call Trace: iwl_mvm_enable_txq+0x21a/0x3b0 [iwlmvm] iwl_mvm_add_new_dqa_stream_wk+0x809/0x1690 [iwlmvm] ? iwl_mvm_add_new_dqa_stream_wk+0x809/0x1690 [iwlmvm] ? __switch_to+0xad/0x500 ? put_prev_entity+0x25/0x100 process_one_work+0x1de/0x410 worker_thread+0x32/0x410 kthread+0x121/0x140 ? process_one_work+0x410/0x410 ? kthread_create_worker_on_cpu+0x70/0x70 ret_from_fork+0x35/0x40 Code: 4c 8b b4 c7 e8 7d 00 00 f0 48 0f ab 87 e8 8d 00 00 73 0d 80 3d 16 ad 02 00 00 0f 84 c1 03 00 00 44 89 c7 e8 61 aa ac f6 4d 85 e4 <49> 89 46 68 0f 84 cf 02 00 00 41 0f b6 04 24 89 45 b8 41 0f b6 RIP: iwl_trans_pcie_txq_enable+0x62/0x460 [iwlwifi] RSP: ffffa38b41577c10 CR2: 0000000000000068 ---[ end trace 5d2a3090feef8ec6 ]--- -- 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/1733194 Title: kernel NULL pointer dereference in iwlmvm iwl_mvm_enable_txq Status in linux package in Ubuntu: Confirmed Bug description: When in AP mode after some time, get this BUG: Nov 18 23:21:31 bifrost kernel: [18345.860393] BUG: unable to handle kernel NULL pointer dereference at 0000000000000070 Nov 18 23:21:31 bifrost kernel: [18345.860552] IP: iwl_trans_pcie_txq_enable+0x62/0x440 [iwlwifi] Nov 18 23:21:31 bifrost kernel: [18345.860644] PGD 0 Nov 18 23:21:31 bifrost kernel: [18345.860646] P4D 0 Nov 18 23:21:31 bifrost kernel: [18345.860682] Nov 18 23:21:31 bifrost kernel: [18345.860747] Oops: 0002 [#1] SMP Nov 18 23:21:31 bifrost kernel: [18345.860800] Modules linked in: nfnetlink_queue nfnetlink_log nfnetlink dummy ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs ccm xfrm_user xfrm4_tunnel tunnel4 ipcomp xfrm_ipcomp esp4 ah4 af_key xfrm_algo xt_policy xt_multiport ip6table_filter ip6_tables ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 nf_nat ipt_REJECT nf_reject_ipv4 xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack iptable_filter nls_iso8859_1 cmdlinepart intel_spi_platform intel_spi spi_nor mtd arc4 intel_rapl intel_soc_dts_thermal intel_soc_dts_iosf intel_powerclamp coretemp kvm_intel bridge kvm stp llc iwlmvm irqbypass punit_atom_debug mac80211 intel_cstate snd_hda_codec_hdmi iwlwifi snd_hda_codec_realtek snd_hda_codec_generic cfg80211 btusb snd_hda_intel lpc_ich btrtl snd_hda_codec snd_intel_sst_acpi Nov 18 23:21:31 bifrost kernel: [18345.861897] mei_txe snd_hda_core mei snd_hwdep shpchp snd_intel_sst_core snd_soc_sst_atom_hifi2_platform hci_uart snd_soc_sst_match snd_soc_core btbcm serdev snd_compress btqca ac97_bus btintel snd_pcm_dmaengine snd_pcm dw_dmac dw_dmac_core snd_timer bluetooth snd soundcore mac_hid intel_int0002_vgpio ecdh_generic spi_pxa2xx_platform rfkill_gpio pwm_lpss_platform pwm_lpss 8250_dw ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables autofs4 btrfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear i915 drm_kms_helper crct10dif_pclmul igb syscopyarea sysfillrect crc32_pclmul sysimgblt fb_sys_fops dca ghash_clmulni_intel i2c_algo_bit cryptd ahci ptp drm pps_core libahci video Nov 18 23:21:31 bifrost kernel: [18345.862995] i2c_hid hid sdhci_acpi sdhci Nov 18 23:21:31 bifrost kernel: [18345.863068] CPU: 1 PID: 1202 Comm: kworker/1:2 Tainted: G W 4.13.0-16-generic #19-Ubuntu Nov 18 23:21:31 bifrost kernel: [18345.863203] Hardware name: NF541 NF541/NF541, BIOS BAR1NA02 02/25/2016 Nov 18 23:21:31 bifrost kernel: [18345.863326] Workqueue: events iwl_mvm_add_new_dqa_stream_wk [iwlmvm] Nov 18 23:21:31 bifrost kernel: [18345.863428] task: ffff96862c1c5800 task.stack: ffffa98a817c0000 Nov 18 23:21:31 bifrost kernel: [18345.863539] RIP: 0010:iwl_trans_pcie_txq_enable+0x62/0x440 [iwlwifi] Nov 18 23:21:31 bifrost kernel: [18345.863635] RSP: 0018:ffffa98a817c3be0 EFLAGS: 00010246 Nov 18 23:21:31 bifrost kernel: [18345.863718] RAX: 00000000000009c4 RBX: 000000000000001f RCX: 0000000000000000 Nov 18 23:21:31 bifrost kernel: [18345.863824] RDX: 0000000000000000 RSI: 000000000000001f RDI: 0000000000002710 Nov 18 23:21:31 bifrost kernel: [18345.863932] RBP: ffffa98a817c3c30 R08: 0000000000002710 R09: 0000000000000001 Nov 18 23:21:31 bifrost kernel: [18345.864039] R10: 0000000000000000 R11: ffff9686344ce010 R12: 0000000000000000 Nov 18 23:21:31 bifrost kernel: [18345.864145] R13: ffff96862c9d0018 R14: 0000000000000000 R15: 0000000000000000 Nov 18 23:21:31 bifrost kernel: [18345.864253] FS: 0000000000000000(0000) GS:ffff96863fc80000(0000) knlGS:0000000000000000 Nov 18 23:21:31 bifrost kernel: [18345.864373] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Nov 18 23:21:31 bifrost kernel: [18345.864461] CR2: 0000000000000070 CR3: 000000023068b000 CR4: 00000000001006e0 Nov 18 23:21:31 bifrost kernel: [18345.864568] Call Trace: Nov 18 23:21:31 bifrost kernel: [18345.864633] iwl_mvm_enable_txq+0x212/0x3a0 [iwlmvm] Nov 18 23:21:31 bifrost kernel: [18345.864732] iwl_mvm_add_new_dqa_stream_wk+0x7e8/0x15e0 [iwlmvm] Nov 18 23:21:31 bifrost kernel: [18345.864843] ? iwl_mvm_add_new_dqa_stream_wk+0x7e8/0x15e0 [iwlmvm] Nov 18 23:21:31 bifrost kernel: [18345.864945] ? __switch_to+0x211/0x520 Nov 18 23:21:31 bifrost kernel: [18345.865008] ? put_prev_entity+0x23/0xf0 Nov 18 23:21:31 bifrost kernel: [18345.865075] process_one_work+0x1e7/0x410 Nov 18 23:21:31 bifrost kernel: [18345.865143] worker_thread+0x4a/0x410 Nov 18 23:21:31 bifrost kernel: [18345.865204] kthread+0x125/0x140 Nov 18 23:21:31 bifrost kernel: [18345.865260] ? process_one_work+0x410/0x410 Nov 18 23:21:31 bifrost kernel: [18345.869337] ? kthread_create_on_node+0x70/0x70 Nov 18 23:21:31 bifrost kernel: [18345.873431] ret_from_fork+0x25/0x30 Nov 18 23:21:31 bifrost kernel: [18345.877527] Code: 4c 8b b4 c7 08 7e 00 00 f0 48 0f ab 87 08 8e 00 00 73 0d 80 3d d6 3b 02 00 00 0f 84 a1 03 00 00 44 89 c7 e8 21 2f 6b dc 4d 85 e4 <49> 89 46 70 0f 84 d9 02 00 00 41 0f b6 04 24 89 45 b8 41 0f b6 Nov 18 23:21:31 bifrost kernel: [18345.886085] RIP: iwl_trans_pcie_txq_enable+0x62/0x440 [iwlwifi] RSP: ffffa98a817c3be0 Nov 18 23:21:31 bifrost kernel: [18345.890363] CR2: 0000000000000070 Nov 18 23:21:31 bifrost kernel: [18345.894670] ---[ end trace 128827eedfd09435 ]--- --- AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.13.0-16-generic. AplayDevices: Error: [Errno 2] No such file or directory ApportVersion: 2.20.7-0ubuntu3.4 Architecture: amd64 ArecordDevices: Error: [Errno 2] No such file or directory AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/hwC0D2', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D3p', '/dev/snd/pcmC0D1p', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/controlC0', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Card0.Amixer.info: Error: [Errno 2] No such file or directory Card0.Amixer.values: Error: [Errno 2] No such file or directory DistroRelease: Ubuntu 17.10 HibernationDevice: RESUME=/dev/mapper/bifrost--vg-swap_1 InstallationDate: Installed on 2017-02-18 (274 days ago) InstallationMedia: Ubuntu-Server 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.8) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 05e3:0608 Genesys Logic, Inc. Hub Bus 001 Device 002: ID 8087:07dc Intel Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: NF541 NF541 Package: linux (not installed) ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0-16-generic.efi.signed root=/dev/mapper/hostname--vg-root ro ProcVersionSignature: Ubuntu 4.13.0-16.19-generic 4.13.4 RelatedPackageVersions: linux-restricted-modules-4.13.0-16-generic N/A linux-backports-modules-4.13.0-16-generic N/A linux-firmware 1.169 RfKill: Error: [Errno 2] No such file or directory Tags: artful Uname: Linux 4.13.0-16-generic x86_64 UnreportableReason: The report belongs to a package that is not installed. UpgradeStatus: Upgraded to artful on 2017-11-18 (0 days ago) UserGroups: _MarkForUpload: False dmi.bios.date: 02/25/2016 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: BAR1NA02 dmi.board.asset.tag: To be filled by O.E.M. dmi.board.name: NF541 dmi.board.vendor: NF541 dmi.board.version: 1.0 dmi.chassis.type: 3 dmi.chassis.vendor: NF541 dmi.chassis.version: 1.0 dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrBAR1NA02:bd02/25/2016:svnNF541:pnNF541:pvr1.0:rvnNF541:rnNF541:rvr1.0:cvnNF541:ct3:cvr1.0: dmi.product.family: To be filled by O.E.M. dmi.product.name: NF541 dmi.product.version: 1.0 dmi.sys.vendor: NF541 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1733194/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
