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From:   Kalle Valo <kvalo@codeaurora.org>
To:     Steve French <smfrench@gmail.com>
Cc:     LKML <linux-kernel@vger.kernel.org>, linux-wireless@vger.kernel.org
Subject: Re: 5.5-rc1 oops on boot in 802.11 kernel driver
References: <CAH2r5mvZ=S0FHGP+Y_r5f37TXVehv2shj9f6w67zBxfjR+Zt-Q@mail.gmail.com>
Date:   Mon, 9 Dec 2019 10:27:42 +0000
In-Reply-To: <CAH2r5mvZ=S0FHGP+Y_r5f37TXVehv2shj9f6w67zBxfjR+Zt-Q@mail.gmail.com>
        (Steve French's message of "Sun, 8 Dec 2019 20:49:56 -0600")
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Sender: linux-wireless-owner@vger.kernel.org
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Hi Steve,

Steve French <smfrench@gmail.com> writes:

> Noticed this crash in the Linux kernel Wifi driver on boot a few
> minutes ago immediately after updating to latest mainline kernel about
> an hour ago. I didn't see it last week and certainly not in 5.4.

please CC linux-wireless on all wireless related problems, we don't
follow lkml very closely and I found your email just by chance.

Full warning below. Steve is using iwlwifi.

>
> [   36.904191] ------------[ cut here ]------------
> [   36.904192] STA e0:3f:49:98:14:80 AC 2 txq pending airtime
> underflow: 4294967132, 260
> [   36.904231] WARNING: CPU: 11 PID: 680 at
> net/mac80211/sta_info.c:1931
> ieee80211_sta_update_pending_airtime+0x115/0x120 [mac80211]
> [   36.904232] Modules linked in: uinput ccm xt_CHECKSUM xt_MASQUERADE
> nf_nat_tftp nf_conntrack_tftp tun bridge stp llc
> nf_conntrack_netbios_ns nf_conntrack_broadcast xt_CT ip6t_REJECT
> nf_reject_ipv6 ip6t_rpfilter ipt_REJECT nf_reject_ipv4 xt_conntrack
> ebtable_nat ebtable_broute ip6table_nat ip6table_mangle ip6table_raw
> ip6table_security iptable_nat nf_nat iptable_mangle iptable_raw
> iptable_security nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set
> nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables
> iptable_filter bnep sunrpc xfs vfat fat libcrc32c typec_displayport
> elan_i2c x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel
> snd_soc_skl kvm snd_hda_codec_hdmi snd_soc_hdac_hda snd_hda_ext_core
> snd_soc_sst_ipc irqbypass snd_soc_sst_dsp snd_soc_acpi_intel_match
> snd_soc_acpi snd_soc_core crct10dif_pclmul snd_hda_codec_realtek
> iTCO_wdt crc32_pclmul iwlmvm snd_hda_codec_generic snd_compress
> iTCO_vendor_support ac97_bus snd_pcm_dmaengine mei_hdcp mei_wdt
> ghash_clmulni_intel
> [   36.904245]  intel_rapl_msr snd_hda_intel snd_intel_dspcfg mac80211
> snd_hda_codec intel_cstate snd_hda_core intel_uncore uvcvideo libarc4
> btusb intel_rapl_perf snd_hwdep videobuf2_vmalloc btrtl snd_seq
> videobuf2_memops btbcm videobuf2_v4l2 btintel videobuf2_common pcspkr
> snd_seq_device wmi_bmof intel_wmi_thunderbolt bluetooth i2c_i801
> iwlwifi videodev snd_pcm thinkpad_acpi thunderbolt mei_me
> intel_lpss_pci cfg80211 ecdh_generic intel_lpss ledtrig_audio joydev
> mei snd_timer mc ecc idma64 snd ucsi_acpi processor_thermal_device
> typec_ucsi intel_rapl_common int3403_thermal soundcore
> intel_pch_thermal intel_soc_dts_iosf typec rfkill int340x_thermal_zone
> int3400_thermal acpi_pad acpi_thermal_rel ip_tables wacom nouveau
> mxm_wmi i2c_algo_bit rtsx_pci_sdmmc mmc_core drm_kms_helper ttm nvme
> drm e1000e crc32c_intel nvme_core serio_raw rtsx_pci wmi
> pinctrl_cannonlake video pinctrl_intel fuse
> [   36.904263] CPU: 11 PID: 680 Comm: irq/162-iwlwifi Not tainted
> 5.5.0-0.rc0.git7.1.vanilla.knurd.1.fc31.x86_64 #1
> [   36.904263] Hardware name: LENOVO 20MAS08500/20MAS08500, BIOS
> N2CET48W (1.31 ) 11/04/2019
> [   36.904271] RIP:
> 0010:ieee80211_sta_update_pending_airtime+0x115/0x120 [mac80211]
> [   36.904272] Code: 3f e3 0f 0b 8b 44 24 04 eb 9d 48 83 c6 40 41 89
> e8 89 c1 48 c7 c7 20 dd d5 c0 89 44 24 04 c6 05 35 99 0b 00 01 e8 bd
> cc 3f e3 <0f> 0b 8b 44 24 04 eb 8c 0f 1f 00 0f 1f 44 00 00 55 89 f5 53
> 48 89
> [   36.904273] RSP: 0018:ffffa4e3809c7ba8 EFLAGS: 00010286
> [   36.904273] RAX: 0000000000000000 RBX: 00000000fffffefc RCX: 0000000000000000
> [   36.904274] RDX: 0000000000000049 RSI: ffffffffa6150489 RDI: 0000000000000246
> [   36.904274] RBP: 0000000000000104 R08: 0000000897a94ba5 R09: 0000000000000049
> [   36.904275] R10: 0000000000000002 R11: 00000000a6150443 R12: ffff8a0774e607c0
> [   36.904275] R13: 0000000000000002 R14: ffff8a07778025c8 R15: ffff8a07044f3000
> [   36.904276] FS:  0000000000000000(0000) GS:ffff8a077bcc0000(0000)
> knlGS:0000000000000000
> [   36.904276] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [   36.904277] CR2: 00003446319a8000 CR3: 000000042c60a004 CR4: 00000000003606e0
> [   36.904277] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [   36.904277] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> [   36.904278] Call Trace:
> [   36.904286]  __ieee80211_tx_status+0x720/0x900 [mac80211]
> [   36.904293]  ieee80211_tx_status+0x6a/0x90 [mac80211]
> [   36.904299]  iwl_mvm_tx_reclaim+0x2a2/0x3c0 [iwlmvm]
> [   36.904304]  iwl_mvm_rx_ba_notif+0xff/0x2e0 [iwlmvm]
> [   36.904307]  ? __switch_to_asm+0x40/0x70
> [   36.904311]  iwl_mvm_rx_common+0xdd/0x2c0 [iwlmvm]
> [   36.904317]  iwl_pcie_rx_handle+0x3af/0x9c0 [iwlwifi]
> [   36.904319]  ? irq_finalize_oneshot.part.0+0xf0/0xf0
> [   36.904322]  iwl_pcie_irq_rx_msix_handler+0x45/0x80 [iwlwifi]
> [   36.904323]  irq_thread_fn+0x20/0x60
> [   36.904325]  irq_thread+0xdc/0x170
> [   36.904326]  ? irq_forced_thread_fn+0x80/0x80
> [   36.904327]  kthread+0xf9/0x130
> [   36.904328]  ? irq_thread_check_affinity+0xf0/0xf0
> [   36.904329]  ? kthread_park+0x90/0x90
> [   36.904330]  ret_from_fork+0x35/0x40
> [   36.904332] ---[ end trace ce4946b8661ca7fd ]---
> [   36.904332] ------------[ cut here ]------------

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