Comment 10 for bug 1863627

A similar WARNING occurred on my system with the 5.4.8 kernel:

[197381.258666] wlan0: deauthenticating from e4:aa:5d:e0:e5:60 by local choice (Reason: 3=DEAUTH_LEAVING)
[197381.271296] iwlwifi 0000:02:00.0: RF_KILL bit toggled to disable radio.
[197381.271301] iwlwifi 0000:02:00.0: reporting RF_KILL (radio disabled)
[197381.306489] ------------[ cut here ]------------
[197381.306495] UMAC scan UID 0 status was not cleaned
[197381.306696] WARNING: CPU: 3 PID: 1589 at drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c:1221 __iwl_mvm_mac_stop+0x14f/0x160 [iwlmvm]
[197381.306700] Modules linked in: ccm md4 cmac nls_utf8 fscache libdes snd_usb_audio snd_usbmidi_lib uas usb_storage xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp ip6table_mangle ip6table_nat iptable_mangle iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip6table_filter ip6_tables iptable_filter bpfilter bridge stp llc overlay bnep binfmt_misc nls_iso8859_1 snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_soc_skl snd_soc_sst_ipc snd_soc_sst_dsp snd_hda_ext_core snd_soc_acpi_intel_match snd_soc_acpi snd_soc_core snd_compress ac97_bus snd_pcm_dmaengine snd_hda_intel snd_intel_nhlt snd_hda_codec snd_hda_core snd_hwdep dell_rbtn snd_pcm snd_seq_midi snd_seq_midi_event x86_pkg_temp_thermal intel_powerclamp coretemp snd_rawmidi mei_hdcp intel_rapl_msr snd_seq crct10dif_pclmul crc32_pclmul iwlmvm snd_seq_device mac80211 snd_timer ghash_clmulni_intel libarc4 iwlwifi dell_laptop dell_wmi joydev btusb ledtrig_audio uvcvideo btrtl
[197381.306777] videobuf2_vmalloc aesni_intel btbcm videobuf2_memops btintel videobuf2_v4l2 i915 dell_smm_hwmon crypto_simd videobuf2_common cryptd dell_smbios glue_helper dcdbas input_leds snd intel_cstate videodev serio_raw wmi_bmof intel_rapl_perf soundcore mc cfg80211 bluetooth drm_kms_helper rtsx_pci_ms intel_wmi_thunderbolt dell_wmi_descriptor memstick drm mei_me hid_multitouch mei i2c_algo_bit fb_sys_fops syscopyarea ecdh_generic sysfillrect ucsi_acpi processor_thermal_device typec_ucsi intel_xhci_usb_role_switch intel_rapl_common ecc intel_pch_thermal roles sysimgblt intel_soc_dts_iosf typec dell_smo8800 int3403_thermal int340x_thermal_zone int3400_thermal acpi_pad intel_hid acpi_thermal_rel sparse_keymap mac_hid sch_fq_codel kvm_intel nf_tables kvm irqbypass nfnetlink parport_pc ppdev lp parport ip_tables x_tables autofs4 btrfs xor zstd_compress raid6_pq libcrc32c usbhid hid_generic nvme rtsx_pci_sdmmc e1000e i2c_i801 nvme_core rtsx_pci intel_lpss_pci ahci intel_lpss libahci idma64
[197381.306892] virt_dma wmi i2c_hid hid video [last unloaded: cifs]
[197381.306909] CPU: 3 PID: 1589 Comm: NetworkManager Not tainted 5.4.8-050408-generic #202001041436
[197381.306912] Hardware name: Dell Inc. Latitude 5590/0VYDFF, BIOS 1.11.1 09/19/2019
[197381.306937] RIP: 0010:__iwl_mvm_mac_stop+0x14f/0x160 [iwlmvm]
[197381.306942] Code: 5f 04 00 00 74 0e 42 c7 84 a3 c4 1d 00 00 00 00 00 00 eb be 44 89 e6 48 c7 c7 b8 f7 cb c0 c6 05 cb 5f 04 00 01 e8 9c 99 a1 e9 <0f> 0b eb d8 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 0f 1f 44 00 00
[197381.306945] RSP: 0018:ffffb163008ffc20 EFLAGS: 00010282
[197381.306949] RAX: 0000000000000000 RBX: ffff96d014d69e48 RCX: 0000000000000006
[197381.306951] RDX: 0000000000000007 RSI: 0000000000000092 RDI: ffff96d01e397440
[197381.306953] RBP: ffffb163008ffc38 R08: 00000000000007bc R09: 0000000000000004
[197381.306955] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
[197381.306957] R13: ffff96d014d6acc8 R14: ffff96d014d69e48 R15: ffff96d014d68f98
[197381.306961] FS: 00007ff0aa087bc0(0000) GS:ffff96d01e380000(0000) knlGS:0000000000000000
[197381.306964] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[197381.306966] CR2: 00007f3a744321ec CR3: 00000003fbc5a005 CR4: 00000000003606e0
[197381.306968] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[197381.306970] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[197381.306972] Call Trace:
[197381.307003] iwl_mvm_mac_stop+0xbb/0xe0 [iwlmvm]
[197381.307130] drv_stop+0x39/0x110 [mac80211]
[197381.307190] ieee80211_stop_device+0x46/0x50 [mac80211]
[197381.307235] ieee80211_do_stop+0x58e/0x830 [mac80211]
[197381.307292] ieee80211_stop+0x1a/0x20 [mac80211]
[197381.307307] __dev_close_many+0xa5/0x120
[197381.307313] dev_close_many+0x91/0x150
[197381.307320] dev_close.part.0+0x4a/0x70
[197381.307326] dev_close+0x18/0x20
[197381.307438] cfg80211_shutdown_all_interfaces+0x77/0xd0 [cfg80211]
[197381.307478] cfg80211_rfkill_set_block+0x26/0x30 [cfg80211]
[197381.307494] rfkill_set_block+0x9b/0x150
[197381.307501] rfkill_fop_write+0x136/0x1e0
[197381.307513] __vfs_write+0x1b/0x40
[197381.307520] vfs_write+0xb9/0x1a0
[197381.307526] ksys_write+0xb1/0xe0
[197381.307533] __x64_sys_write+0x1a/0x20
[197381.307545] do_syscall_64+0x57/0x190
[197381.307561] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[197381.307568] RIP: 0033:0x7ff0ab6c027f
[197381.307575] Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 19 fd ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 2d 44 89 c7 48 89 44 24 08 e8 4c fd ff ff 48
[197381.307578] RSP: 002b:00007ffe9ba963a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
[197381.307583] RAX: ffffffffffffffda RBX: 0000563468408f85 RCX: 00007ff0ab6c027f
[197381.307585] RDX: 0000000000000008 RSI: 00007ffe9ba963d8 RDI: 000000000000001b
[197381.307587] RBP: 000000000000001b R08: 0000000000000000 R09: 0000000000000001
[197381.307590] R10: 0000000000000000 R11: 0000000000000293 R12: 000056346a518020
[197381.307591] R13: 0000000000000000 R14: 0000000000000000 R15: 000056346a524a10
[197381.307601] ---[ end trace 5e11734125da294e ]---