Feb 112020
 

Arch Linuxで突如WiFiに接続できなくなりまして、ジャーナルを見ていたら以下のようなログが。

[   25.669989] ------------[ cut here ]------------
[   25.670056] WARNING: CPU: 4 PID: 1026 at net/wireless/nl80211.c:7035 nl80211_get_reg_do+0x228/0x290 [cfg80211]
[   25.670059] Modules linked in: sd_mod snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic x86_pkg_temp_thermal joydev intel_powerclamp mousedev coretemp kvm_intel uvcvideo videobuf2_vmalloc elan_i2c videobuf2_memops kvm vide
obuf2_v4l2 i915 iTCO_wdt btusb iTCO_vendor_support iwlmvm videobuf2_common snd_hda_intel btrtl btbcm mei_hdcp intel_rapl_msr irqbypass crct10dif_pclmul crc32_pclmul videodev btintel snd_intel_dspcfg mac80211 bluetooth wmi_bmof mc snd_hda_
codec ghash_clmulni_intel intel_wmi_thunderbolt uas usb_storage aesni_intel libarc4 scsi_mod ecdh_generic crypto_simd ecc cryptd i2c_algo_bit snd_hda_core iwlwifi nls_iso8859_1 glue_helper nls_cp437 snd_hwdep intel_cstate vfat drm_kms_hel
per fat snd_pcm intel_uncore intel_rapl_perf psmouse input_leds cfg80211 pcspkr e1000e drm i2c_i801 snd_timer intel_gtt agpgart mei_me thunderbolt nxp_nci_i2c intel_xhci_usb_role_switch syscopyarea mei intel_lpss_pci processor_thermal_dev
ice nxp_nci roles sysfillrect intel_lpss nci
[   25.670124]  intel_rapl_common sysimgblt idma64 ucsi_acpi fb_sys_fops intel_pch_thermal intel_soc_dts_iosf typec_ucsi typec tpm_crb nfc wmi thinkpad_acpi nvram ledtrig_audio rfkill snd tpm_tis tpm_tis_core int3403_thermal battery sound
core int340x_thermal_zone ac tpm int3400_thermal evdev acpi_thermal_rel rng_core mac_hid pkcs8_key_parser crypto_user ip_tables x_tables ext4 crc32c_generic crc16 mbcache jbd2 serio_raw atkbd libps2 xhci_pci crc32c_intel xhci_hcd i8042 se
rio
[   25.670170] CPU: 4 PID: 1026 Comm: wpa_supplicant Tainted: G        W         5.5.2-arch1-1 #1
[   25.670172] Hardware name: LENOVO 20L7CTO1WW/20L7CTO1WW, BIOS N22ET60W (1.37 ) 11/25/2019
[   25.670214] RIP: 0010:nl80211_get_reg_do+0x228/0x290 [cfg80211]
[   25.670219] Code: 89 ef c7 44 24 0c 01 00 00 00 e8 d3 d2 91 c5 85 c0 74 cc e9 ff fe ff ff 48 89 ef 48 89 04 24 e8 4e 3e be c5 48 8b 04 24 eb 89 <0f> 0b 48 89 ef e8 3e 3e be c5 b8 ea ff ff ff e9 75 ff ff ff b8 97
[   25.670222] RSP: 0018:ffffa63480ebba60 EFLAGS: 00010202
[   25.670226] RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
[   25.670228] RDX: ffff8ecc14168008 RSI: 0000000000000000 RDI: ffff8ecc14168300
[   25.670230] RBP: ffff8ecc126c8400 R08: 0000000000000004 R09: ffff8ecc1219c014
[   25.670232] R10: 000000000000001e R11: ffffa63480ebbb20 R12: ffffa63480ebbb20
[   25.670234] R13: ffff8ecc1219c014 R14: 0000000000000000 R15: ffff8ecc14168300
[   25.670238] FS:  00007fd9d44f97c0(0000) GS:ffff8ecc1a700000(0000) knlGS:0000000000000000
[   25.670240] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   25.670243] CR2: 000055b3aed81018 CR3: 0000000630858001 CR4: 00000000003606e0
[   25.670245] Call Trace:
[   25.670267]  genl_rcv_msg+0x1d2/0x480
[   25.670276]  ? __alloc_skb+0x87/0x1d0
[   25.670282]  ? kmalloc_large_node+0x84/0x90
[   25.670289]  ? genl_family_rcv_msg_attrs_parse+0x100/0x100
[   25.670293]  netlink_rcv_skb+0x75/0x140
[   25.670299]  genl_rcv+0x24/0x40
[   25.670304]  netlink_unicast+0x199/0x240
[   25.670309]  netlink_sendmsg+0x243/0x480
[   25.670316]  sock_sendmsg+0x5e/0x60
[   25.670321]  ____sys_sendmsg+0x21b/0x290
[   25.670326]  ? copy_msghdr_from_user+0xe1/0x160
[   25.670333]  ___sys_sendmsg+0x9e/0xe0
[   25.670346]  __sys_sendmsg+0x81/0xd0
[   25.670357]  do_syscall_64+0x4e/0x150
[   25.670365]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[   25.670370] RIP: 0033:0x7fd9d485f7b7
[   25.670374] Code: 64 89 02 48 c7 c0 ff ff ff ff eb bb 0f 1f 80 00 00 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
[   25.670377] RSP: 002b:00007ffc2b9fa148 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   25.670380] RAX: ffffffffffffffda RBX: 000055b3aed4d620 RCX: 00007fd9d485f7b7
[   25.670382] RDX: 0000000000000000 RSI: 00007ffc2b9fa180 RDI: 0000000000000004
[   25.670385] RBP: 000055b3aed4d530 R08: 0000000000000004 R09: 000055b3aed4a010
[   25.670387] R10: 00007ffc2b9fa254 R11: 0000000000000246 R12: 000055b3aed7c9d0
[   25.670389] R13: 00007ffc2b9fa180 R14: 00007ffc2b9fa254 R15: 000055b3aed7e130
[   25.670397] ---[ end trace a3d3dd4cae3c209a ]---

wpa_supplicant起動時に発生しているようで、ものは試しにとiwdを使ってみましたが、同じようにエラーになります。いろいろ調べた結果 FS#65041 – Unable to associate with WiFi wireless network with kernel 5.4.7-arch1-1 と同じ症状のようで、rfkillでwlanをunblockedにしたら接続できるようになりました。

$ sudo rfkill unblock wlan

ちなみにrfkillコマンドはutil-linuxパッケージで提供されているのですが、こちらのパッケージではrfkill unblock用のsystemdサービスも用意されていて、以下のとおり有効化することで毎回起動時にunblockされるようになります。

$ sudo systemctl enable rfkill-unblock@wlan.service

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