Just a note, I have the same problem with IntelĀ® Wireless-AC 3168 (firmware version 29.541020.0 op_mode iwlmvm) on Gentoo linux-4.14.8-gentoo-r1 in AP mode (802.11n).
Sometimes kernel only shows warnings from drivers/net/wireless/intel/iwlwifi/mvm/tx.c:1363: ----- case TX_STATUS_FAIL_DEST_PS: /* the FW should have stopped the queue and not * return this status */ WARN_ON(1); info->flags |= IEEE80211_TX_STAT_TX_FILTERED; break; ----- 2018-01-03T21:16:51+01:00 [warning] kernel: ------------[ cut here ]------------ 2018-01-03T21:16:51+01:00 [warning] kernel: WARNING: CPU: 2 PID: 81 at drivers/net/wireless/intel/iwlwifi/mvm/tx.c:1363 iwl_mvm_rx_tx_cmd+0x361/0x610 2018-01-03T21:16:51+01:00 [warning] kernel: Modules linked in: rtl8812au(O) 2018-01-03T21:16:51+01:00 [warning] kernel: CPU: 2 PID: 81 Comm: irq/123-iwlwifi Tainted: G W O 4.14.8-gentoo-r1 #1 2018-01-03T21:16:51+01:00 [warning] kernel: Hardware name: /NUC6CAYB, BIOS AYAPLCEL.86A.0041.2017.0825.1152 08/25/2017 2018-01-03T21:16:51+01:00 [warning] kernel: task: ffff9ea3f4730000 task.stack: ffffb50340270000 2018-01-03T21:16:51+01:00 [warning] kernel: RIP: 0010:iwl_mvm_rx_tx_cmd+0x361/0x610 2018-01-03T21:16:51+01:00 [warning] kernel: RSP: 0018:ffffb50340273cb8 EFLAGS: 00010246 2018-01-03T21:16:51+01:00 [warning] kernel: RAX: 0000000000000088 RBX: ffff9ea3d6107700 RCX: 0000000000031040 2018-01-03T21:16:51+01:00 [warning] kernel: RDX: 000000000003103f RSI: ffff9ea3ffd20dc0 RDI: ffff9ea3f45ed200 2018-01-03T21:16:51+01:00 [warning] kernel: RBP: ffffb50340273d38 R08: 0000000000020dc0 R09: ffffffffb74e5b5d 2018-01-03T21:16:51+01:00 [warning] kernel: R10: ffff9ea3d6107730 R11: ffffffffb737b110 R12: ffff9ea3f40f9388 2018-01-03T21:16:51+01:00 [warning] kernel: R13: 000000000000d000 R14: ffff9ea3d6107700 R15: ffff9ea3e1e93000 2018-01-03T21:16:51+01:00 [warning] kernel: FS: 0000000000000000(0000) GS:ffff9ea3ffd00000(0000) knlGS:0000000000000000 2018-01-03T21:16:51+01:00 [warning] kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 2018-01-03T21:16:51+01:00 [warning] kernel: CR2: 00007ed717e8eee0 CR3: 000000023fe09000 CR4: 00000000003406e0 2018-01-03T21:16:51+01:00 [warning] kernel: Call Trace: 2018-01-03T21:16:51+01:00 [warning] kernel: iwl_mvm_rx_common+0x181/0x2b0 2018-01-03T21:16:51+01:00 [warning] kernel: iwl_mvm_rx+0x6b/0x80 2018-01-03T21:16:51+01:00 [warning] kernel: iwl_pcie_rx_handle+0x2ee/0x860 2018-01-03T21:16:51+01:00 [warning] kernel: iwl_pcie_irq_handler+0x18d/0x6c0 2018-01-03T21:16:51+01:00 [warning] kernel: ? irq_forced_thread_fn+0x80/0x80 2018-01-03T21:16:51+01:00 [warning] kernel: irq_thread_fn+0x2a/0x60 2018-01-03T21:16:51+01:00 [warning] kernel: irq_thread+0x149/0x1b0 2018-01-03T21:16:51+01:00 [warning] kernel: ? __schedule+0x1c6/0x4f0 2018-01-03T21:16:51+01:00 [warning] kernel: ? wake_threads_waitq+0x40/0x40 2018-01-03T21:16:51+01:00 [warning] kernel: kthread+0x106/0x140 2018-01-03T21:16:51+01:00 [warning] kernel: ? irq_thread_dtor+0xb0/0xb0 2018-01-03T21:16:51+01:00 [warning] kernel: ? kthread_create_on_node+0x70/0x70 2018-01-03T21:16:51+01:00 [warning] kernel: ret_from_fork+0x22/0x30 2018-01-03T21:16:51+01:00 [warning] kernel: Code: 00 49 c7 42 20 00 00 00 00 0f 84 b6 fe ff ff 0f 87 98 fe ff ff 66 83 7d b2 01 77 08 41 81 4e 28 00 02 00 00 31 db e9 9f fe ff ff <0f> ff 31 db 41 81 4e 28 00 01 00 00 e9 8e fe ff ff 49 8b 86 c8 2018-01-03T21:16:51+01:00 [warning] kernel: ---[ end trace 0b4f679a324845ac ]--- And here is the crash itself: ----- 2018-01-04T18:03:16+01:00 [alert] kernel: BUG: unable to handle kernel NULL pointer dereference at 0000000000000070 2018-01-04T18:03:16+01:00 [alert] kernel: IP: iwl_trans_pcie_txq_enable+0x6b/0x410 2018-01-04T18:03:16+01:00 [info] kernel: PGD 0 P4D 0 2018-01-04T18:03:16+01:00 [warning] kernel: Oops: 0002 [#1] SMP 2018-01-04T18:03:16+01:00 [warning] kernel: Modules linked in: rtl8812au(O) 2018-01-04T18:03:16+01:00 [warning] kernel: CPU: 1 PID: 30588 Comm: kworker/1:2 Tainted: G W O 4.14.8-gentoo-r1 #1 2018-01-04T18:03:16+01:00 [warning] kernel: Hardware name: /NUC6CAYB, BIOS AYAPLCEL.86A.0041.2017.0825.1152 08/25/2017 2018-01-04T18:03:16+01:00 [warning] kernel: Workqueue: events iwl_mvm_add_new_dqa_stream_wk 2018-01-04T18:03:16+01:00 [warning] kernel: task: ffff9ea3f5b08000 task.stack: ffffb50340894000 2018-01-04T18:03:16+01:00 [warning] kernel: RIP: 0010:iwl_trans_pcie_txq_enable+0x6b/0x410 2018-01-04T18:03:16+01:00 [warning] kernel: RSP: 0018:ffffb50340897bf8 EFLAGS: 00010246 2018-01-04T18:03:16+01:00 [warning] kernel: RAX: 00000000000003e8 RBX: 000000000000001f RCX: 0000000000000000 2018-01-04T18:03:16+01:00 [warning] kernel: RDX: 0000000000000fa3 RSI: 000000000000001f RDI: 0000000000002710 2018-01-04T18:03:16+01:00 [warning] kernel: RBP: ffffb50340897c60 R08: 0000000000002710 R09: 0000000000000001 2018-01-04T18:03:16+01:00 [warning] kernel: R10: 0000000000000000 R11: ffff9ea3f40f9e30 R12: 0000000000000000 2018-01-04T18:03:16+01:00 [warning] kernel: R13: 0000000000000000 R14: 0000000000000000 R15: ffff9ea3f47b0018 2018-01-04T18:03:16+01:00 [warning] kernel: FS: 0000000000000000(0000) GS:ffff9ea3ffc80000(0000) knlGS:0000000000000000 2018-01-04T18:03:16+01:00 [warning] kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 2018-01-04T18:03:16+01:00 [warning] kernel: CR2: 0000000000000070 CR3: 000000023fe09000 CR4: 00000000003406e0 2018-01-04T18:03:16+01:00 [warning] kernel: Call Trace: 2018-01-04T18:03:16+01:00 [warning] kernel: iwl_mvm_enable_txq+0x1eb/0x350 2018-01-04T18:03:16+01:00 [warning] kernel: iwl_mvm_add_new_dqa_stream_wk+0xa89/0x15d0 2018-01-04T18:03:16+01:00 [warning] kernel: ? iwl_mvm_add_new_dqa_stream_wk+0xa89/0x15d0 2018-01-04T18:03:16+01:00 [warning] kernel: ? pick_next_task_fair+0x1e9/0x5b0 2018-01-04T18:03:16+01:00 [warning] kernel: process_one_work+0x164/0x330 2018-01-04T18:03:16+01:00 [warning] kernel: worker_thread+0x5b/0x3b0 2018-01-04T18:03:16+01:00 [warning] kernel: kthread+0x106/0x140 2018-01-04T18:03:16+01:00 [warning] kernel: ? process_one_work+0x330/0x330 2018-01-04T18:03:16+01:00 [warning] kernel: ? kthread_create_on_node+0x70/0x70 2018-01-04T18:03:16+01:00 [warning] kernel: ret_from_fork+0x22/0x30 2018-01-04T18:03:16+01:00 [warning] kernel: Code: c7 48 7d 00 00 f0 48 0f ab 87 48 8d 00 00 73 0d 80 3d 62 9e 9a 00 00 0f 84 ea 02 00 00 44 89 c7 89 55 b0 e8 f8 1b bd ff 4d 85 ed <49> 89 46 70 8b 55 b0 0f 84 07 03 00 00 41 0f b6 87 2a 8e 00 00 2018-01-04T18:03:16+01:00 [alert] kernel: RIP: iwl_trans_pcie_txq_enable+0x6b/0x410 RSP: ffffb50340897bf8 2018-01-04T18:03:16+01:00 [warning] kernel: CR2: 0000000000000070 2018-01-04T18:03:16+01:00 [warning] kernel: ---[ end trace 0b4f679a324845ad ]--- ----- -- 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