Comment 14 for bug 1863627

This bug still exists in the 5.8.7 kernel:

[ 8947.646422] ------------[ cut here ]------------
[ 8947.646427] UMAC scan UID 0 status was not cleaned
[ 8947.646508] WARNING: CPU: 3 PID: 1233 at drivers/net/wireless/intel/iwlwifi/mvm/mac80211.c:1238 __iwl_mvm_mac_s
top+0x14a/0x150 [iwlmvm]
[ 8947.646510] Modules linked in: ccm usbhid xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_reject_ipv4 xt_t
cpudp 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 snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic binfmt_misc nls_iso8859_1 snd_hda_intel snd_intel_dspcfg snd_hda_codec snd_hda_core snd_hwdep snd_pcm mei_hdcp dell_rbtn intel_rapl_msr snd_seq_midi snd_seq_midi_event snd_rawmidi dell_laptop ledtrig_audio dell_smm_hwmon uvcvideo btusb btrtl videobuf2_vmalloc videobuf2_memops snd_seq btbcm btintel x86_pkg_temp_thermal intel_powerclamp snd_seq_device coretemp snd_timer iwlmvm videobuf2_v4l2 kvm_intel kvm crct10dif_pclmul ghash_clmulni_intel dell_wmi aesni_intel crypto_simd cryptd glue_helper rapl intel_cstate dell_smbios i915 mac80211 joydev libarc4 videobuf2_common dcdbas bluetooth videodev mc iwlwifi efi_pstore snd mei_me
[ 8947.646569] input_leds serio_raw cfg80211 intel_wmi_thunderbolt ucsi_acpi wmi_bmof ecdh_generic ee1004 dell_wmi_descriptor ecc typec_ucsi drm_kms_helper hid_multitouch soundcore cec mei rc_core i2c_algo_bit fb_sys_fops syscopyarea sysfillrect intel_xhci_usb_role_switch processor_thermal_device intel_rapl_common sysimgblt roles intel_soc_dts_iosf intel_pch_thermal typec dell_smo8800 int3403_thermal int340x_thermal_zone acpi_pad int3400_thermal acpi_thermal_rel intel_hid mac_hid sparse_keymap sch_fq_codel parport_pc ppdev nf_tables nfnetlink lp parport drm ip_tables x_tables autofs4 btrfs blake2b_generic xor raid6_pq libcrc32c hid_generic rtsx_pci_sdmmc crc32_pclmul e1000e i2c_i801 ahci nvme i2c_smbus libahci nvme_core intel_lpss_pci intel_lpss rtsx_pci idma64 virt_dma xhci_pci xhci_pci_renesas i2c_hid wmi hid video
[ 8947.646632] CPU: 3 PID: 1233 Comm: NetworkManager Not tainted 5.8.7-050807-lowlatency #202009051031
[ 8947.646634] Hardware name: Dell Inc. Latitude 5590/0VYDFF, BIOS 1.13.1 03/13/2020
[ 8947.646654] RIP: 0010:__iwl_mvm_mac_stop+0x14a/0x150 [iwlmvm]
[ 8947.646659] Code: 9b 04 00 00 74 0e 42 c7 84 a3 fc 17 00 00 00 00 00 00 eb be 44 89 e6 48 c7 c7 68 fa ff c0 c6 05 94 9b 04 00 01 e8 bb cc ce d3 <0f> 0b eb d8 66 90 0f 1f 44 00 00 55 48 89 e5 41 56 41 55 41 54 4c
[ 8947.646662] RSP: 0018:ffffb19680c33c40 EFLAGS: 00010286
[ 8947.646666] RAX: 0000000000000000 RBX: ffff9fef58b61e88 RCX: ffff9fef5e598cd8
[ 8947.646668] RDX: 00000000ffffffd8 RSI: 0000000000000027 RDI: ffff9fef5e598cd0
[ 8947.646670] RBP: ffffb19680c33c58 R08: 0000000000000001 R09: 00000000000004d8
[ 8947.646672] R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000
[ 8947.646674] R13: ffff9fef58b62d08 R14: ffff9fef58b61e88 R15: ffff9fef58b60fe0
[ 8947.646678] FS: 00007f3b19981240(0000) GS:ffff9fef5e580000(0000) knlGS:0000000000000000
[ 8947.646680] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 8947.646683] CR2: 000055c5ee0d97c0 CR3: 00000003f8be8001 CR4: 00000000003606e0
[ 8947.646685] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 8947.646687] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 8947.646689] Call Trace:
[ 8947.646712] iwl_mvm_mac_stop+0x6a/0x90 [iwlmvm]
[ 8947.646762] drv_stop+0x34/0x130 [mac80211]
[ 8947.646811] ieee80211_stop_device+0x46/0x50 [mac80211]
[ 8947.646851] ieee80211_do_stop+0x546/0x860 [mac80211]
[ 8947.646862] ? _raw_spin_unlock_bh+0x1e/0x20
[ 8947.646898] ieee80211_stop+0x1a/0x20 [mac80211]
[ 8947.646906] __dev_close_many+0x9d/0x110
[ 8947.646912] dev_close_many+0x85/0x130
[ 8947.646919] dev_close+0x5e/0x80
[ 8947.646968] cfg80211_shutdown_all_interfaces+0x77/0xd0 [cfg80211]
[ 8947.646994] cfg80211_rfkill_set_block+0x26/0x40 [cfg80211]
[ 8947.647000] rfkill_set_block+0x9b/0x170
[ 8947.647005] rfkill_fop_write+0x136/0x1e0
[ 8947.647011] vfs_write+0xc9/0x200
[ 8947.647015] ksys_write+0xb1/0xe0
[ 8947.647020] __x64_sys_write+0x1a/0x20
[ 8947.647025] do_syscall_64+0x52/0xc0
[ 8947.647030] entry_SYSCALL_64_after_hwframe+0x44/0xa9
[ 8947.647069] RIP: 0033:0x7f3b1adf32cf
[ 8947.647075] Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 29 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 5c fd ff ff 48
[ 8947.647077] RSP: 002b:00007ffea2567f20 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
[ 8947.647081] RAX: ffffffffffffffda RBX: 000055a6dbb7a5c5 RCX: 00007f3b1adf32cf
[ 8947.647083] RDX: 0000000000000008 RSI: 00007ffea2567f58 RDI: 0000000000000020
[ 8947.647085] RBP: 0000000000000020 R08: 0000000000000000 R09: 0000000000000001
[ 8947.647087] R10: 0000000000000000 R11: 0000000000000293 R12: 000055a6dc86d030
[ 8947.647089] R13: 0000000000000000 R14: 0000000000000000 R15: 000055a6dc868820
[ 8947.647097] ---[ end trace 2e88ba49c240cbfe ]---