The error has not occurred after boot:

$ rfkill list
0: hci0: Bluetooth
        Soft blocked: no
        Hard blocked: no
1: phy0: Wireless LAN
        Soft blocked: no
        Hard blocked: no

$ rfkill block 1

The command did not terminate and generated the following output in
dmesg:

[16394.658215] ath10k_pci 0000:02:00.0: wmi command 16387 timeout, restarting 
hardware
[16394.658221] ath10k_pci 0000:02:00.0: failed to set 5g txpower 30: -11
[16394.658223] ath10k_pci 0000:02:00.0: failed to setup tx power 30: -11
[16394.658225] ath10k_pci 0000:02:00.0: failed to recalc tx power: -11
[16394.658348] ath10k_pci 0000:02:00.0: failed to set inactivity time for vdev 
0: -108
[16394.658350] ath10k_pci 0000:02:00.0: failed to setup powersave: -108
[16394.658376] wlp2s0: deauthenticating from 5a:ef:68:b7:22:f2 by local choice 
(Reason: 3=DEAUTH_LEAVING)
[16394.658386] ath10k_pci 0000:02:00.0: failed to set inactivity time for vdev 
0: -108
[16394.658388] ath10k_pci 0000:02:00.0: failed to setup powersave: -108
[16394.658391] ath10k_pci 0000:02:00.0: failed to set PS Mode 0 for vdev 0: -108
[16394.658393] ath10k_pci 0000:02:00.0: failed to setup powersave: -108
[16397.715380] ath10k_pci 0000:02:00.0: failed to receive initialized event 
from target: 00000000
[16400.747627] ath10k_pci 0000:02:00.0: failed to receive initialized event 
from target: 00000000
[16400.747631] ath10k_warn: 2 callbacks suppressed
[16400.747632] ath10k_pci 0000:02:00.0: failed to wait for target init: -110
[16400.749353] ieee80211 phy0: Hardware restart was requested
[16400.749369] ath10k_pci 0000:02:00.0: failed to flush transmit queue (skip 1 
ar-state 2): 1250
[16400.749566] ath10k_pci 0000:02:00.0: failed to delete peer 5a:ef:68:b7:22:f2 
for vdev 0: -108
[16400.749603] ------------[ cut here ]------------
[16400.749630] WARNING: CPU: 3 PID: 17861 at net/mac80211/sta_info.c:1057 
__sta_info_destroy_part2+0x14e/0x160 [mac80211]
[16400.749631] Modules linked in: uas usb_storage usbhid thunderbolt rfcomm 
vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) ccm typec_displayport cmac algif_hash 
algif_skcipher af_alg bnep binfmt_misc mei_hdcp intel_rapl_msr 
snd_hda_codec_hdmi cdc_ether usbnet nls_iso8859_1 snd_hda_codec_realtek 
snd_hda_codec_generic snd_hda_intel dell_laptop snd_intel_nhlt ledtrig_audio 
snd_hda_codec r8152 mii snd_usb_audio ath10k_pci snd_hda_core snd_usbmidi_lib 
ath10k_core snd_hwdep snd_seq_midi snd_seq_midi_event ath snd_pcm joydev 
x86_pkg_temp_thermal snd_rawmidi btusb intel_powerclamp btrtl coretemp btbcm 
btintel kvm_intel uvcvideo bluetooth videobuf2_vmalloc videobuf2_memops 
dell_wmi mac80211 dell_smbios videobuf2_v4l2 dcdbas videobuf2_common kvm 
videodev intel_cstate ecdh_generic mc input_leds ecc snd_seq intel_rapl_perf 
wmi_bmof dell_wmi_descriptor serio_raw intel_wmi_thunderbolt cfg80211 
snd_seq_device snd_timer rtsx_pci_ms snd intel_xhci_usb_role_switch 
processor_thermal_device intel_rapl_common memstick
[16400.749659]  libarc4 soundcore mei_me ucsi_acpi typec_ucsi hid_multitouch 
roles intel_pch_thermal mei typec intel_soc_dts_iosf intel_hid int3403_thermal 
int340x_thermal_zone int3400_thermal sparse_keymap acpi_thermal_rel acpi_pad 
mac_hid sch_fq_codel parport_pc ppdev lp parport ip_tables x_tables autofs4 
mmc_block dm_crypt hid_generic crct10dif_pclmul crc32_pclmul 
ghash_clmulni_intel i915 rtsx_pci_sdmmc nvme aesni_intel crypto_simd 
i2c_algo_bit cryptd glue_helper drm_kms_helper psmouse syscopyarea sysfillrect 
sysimgblt i2c_i801 fb_sys_fops nvme_core intel_lpss_pci drm intel_lpss idma64 
rtsx_pci virt_dma i2c_hid wmi hid pinctrl_sunrisepoint pinctrl_intel video
[16400.749681] CPU: 3 PID: 17861 Comm: rfkill Tainted: G        W  OE     
5.4.0-21-generic #25-Ubuntu
[16400.749682] Hardware name: Dell Inc. XPS 13 9370/0F6P3V, BIOS 1.12.1 
12/11/2019
[16400.749701] RIP: 0010:__sta_info_destroy_part2+0x14e/0x160 [mac80211]
[16400.749702] Code: 24 0c 01 00 00 00 0f 84 52 ff ff ff 45 31 c0 b9 01 00 00 
00 4c 89 e2 48 89 de 4c 89 ef e8 0a a6 ff ff 85 c0 0f 84 34 ff ff ff <0f> 0b e9 
2d ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00
[16400.749703] RSP: 0018:ffffb27f8527f918 EFLAGS: 00010282
[16400.749704] RAX: 00000000ffffff94 RBX: ffff989b07b528c0 RCX: 0000000000000000
[16400.749705] RDX: ffff989afd69af80 RSI: 0000000000000000 RDI: ffff989b03d52f48
[16400.749705] RBP: ffffb27f8527f938 R08: 00000000000005ba R09: 0000000000000004
[16400.749706] R10: 0000000000000000 R11: 0000000000000000 R12: ffff989b3ac8c000
[16400.749707] R13: ffff989b03d507a0 R14: ffff989b07b528c0 R15: ffff989b03d50d68
[16400.749708] FS:  00007fdd1181c740(0000) GS:ffff989b5e4c0000(0000) 
knlGS:0000000000000000
[16400.749708] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[16400.749709] CR2: 000001ce142e0000 CR3: 00000001a639c002 CR4: 00000000003626e0
[16400.749710] Call Trace:
[16400.749725]  __sta_info_flush+0x128/0x180 [mac80211]
[16400.749743]  ieee80211_set_disassoc+0xc0/0x5f0 [mac80211]
[16400.749760]  ieee80211_mgd_deauth+0x104/0x490 [mac80211]
[16400.749776]  ieee80211_deauth+0x18/0x20 [mac80211]
[16400.749808]  cfg80211_mlme_deauth+0xb6/0x1e0 [cfg80211]
[16400.749824]  cfg80211_mlme_down+0x66/0x80 [cfg80211]
[16400.749839]  cfg80211_disconnect+0x127/0x1e0 [cfg80211]
[16400.749845]  ? _raw_spin_unlock_bh+0x1e/0x20
[16400.749858]  __cfg80211_leave+0x133/0x1b0 [cfg80211]
[16400.749872]  cfg80211_leave+0x2c/0x40 [cfg80211]
[16400.749885]  cfg80211_netdev_notifier_call+0x1b2/0x590 [cfg80211]
[16400.749888]  ? try_to_wake_up+0x65/0x6a0
[16400.749890]  ? __mutex_lock.isra.0+0x37/0x4f0
[16400.749891]  ? wake_up_q+0x40/0x70
[16400.749893]  ? wake_up_q+0x40/0x70
[16400.749895]  ? rtnl_is_locked+0x15/0x20
[16400.749898]  ? inetdev_event+0x47/0x560
[16400.749900]  ? skb_dequeue+0x5a/0x70
[16400.749902]  notifier_call_chain+0x55/0x80
[16400.749904]  raw_notifier_call_chain+0x16/0x20
[16400.749906]  call_netdevice_notifiers_info+0x2e/0x60
[16400.749907]  __dev_close_many+0x63/0x120
[16400.749908]  dev_close_many+0x91/0x150
[16400.749910]  dev_close.part.0+0x4a/0x70
[16400.749911]  dev_close+0x18/0x20
[16400.749923]  cfg80211_shutdown_all_interfaces+0x77/0xd0 [cfg80211]
[16400.749935]  cfg80211_rfkill_set_block+0x26/0x30 [cfg80211]
[16400.749937]  rfkill_set_block+0x9b/0x150
[16400.749939]  rfkill_fop_write+0x1a6/0x1e0
[16400.749941]  __vfs_write+0x1b/0x40
[16400.749942]  vfs_write+0xb9/0x1a0
[16400.749943]  ksys_write+0xb1/0xe0
[16400.749945]  __x64_sys_write+0x1a/0x20
[16400.749947]  do_syscall_64+0x57/0x190
[16400.749949]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[16400.749950] RIP: 0033:0x7fdd11930057
[16400.749952] 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 01 00 00 00 0f 05 <48> 3d 00 
f0 ff ff 77 51 c3 48 83 ec 28 48 89 54 24 18 48 89 74 24
[16400.749953] RSP: 002b:00007ffea9f2ea78 EFLAGS: 00000246 ORIG_RAX: 
0000000000000001
[16400.749954] RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007fdd11930057
[16400.749954] RDX: 0000000000000008 RSI: 00007ffea9f2ea90 RDI: 0000000000000003
[16400.749955] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000004
[16400.749956] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
[16400.749956] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
[16400.749958] ---[ end trace e6342b25b0d28a1b ]---
[16400.750022] ath10k_pci 0000:02:00.0: failed to recalculate rts/cts prot for 
vdev 0: -108
[16400.750024] ath10k_pci 0000:02:00.0: failed to set cts protection for vdev 
0: -108
[16400.750027] ath10k_pci 0000:02:00.0: failed to set erp slot for vdev 0: -108
[16400.750028] ath10k_pci 0000:02:00.0: failed to set preamble for vdev 0: -108
[16400.750030] ath10k_pci 0000:02:00.0: failed to down vdev 0: -108
[16400.750032] ath10k_pci 0000:02:00.0: failed to submit vdev param txbf 0x0: 
-108
[16400.750033] ath10k_pci 0000:02:00.0: failed to recalc txbf for vdev 0: -108

I then attempted to do:
$ sudo -s

which also hung.

Subsequent dmesg errors:
16554.906648] INFO: task NetworkManager:1178 blocked for more than 120 seconds.
[16554.906656]       Tainted: G        W  OE     5.4.0-21-generic #25-Ubuntu
[16554.906659] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[16554.906663] NetworkManager  D    0  1178      1 0x00000000
[16554.906668] Call Trace:
[16554.906684]  __schedule+0x2e3/0x740
[16554.906691]  schedule+0x42/0xb0
[16554.906698]  schedule_preempt_disabled+0xe/0x10
[16554.906701]  __mutex_lock.isra.0+0x182/0x4f0
[16554.906711]  ? kmalloc_large_node+0x88/0xa0
[16554.906715]  ? __kmalloc_node_track_caller+0x250/0x310
[16554.906719]  ? __switch_to_asm+0x34/0x70
[16554.906723]  __mutex_lock_slowpath+0x13/0x20
[16554.906727]  mutex_lock+0x2e/0x40
[16554.906731]  rtnl_lock+0x15/0x20
[16554.906786]  nl80211_dump_scan+0x34/0x160 [cfg80211]
[16554.906791]  ? __alloc_skb+0x98/0x1d0
[16554.906799]  netlink_dump+0x18b/0x390
[16554.906806]  __netlink_dump_start+0x191/0x200
[16554.906810]  genl_family_rcv_msg+0x3e9/0x470
[16554.906850]  ? nl80211_dump_survey+0x2c0/0x2c0 [cfg80211]
[16554.906856]  ? do_sys_poll+0x480/0x520
[16554.906861]  ? copyout+0x2c/0x30
[16554.906866]  genl_rcv_msg+0x4c/0xa0
[16554.906872]  ? _cond_resched+0x19/0x30
[16554.906875]  ? genl_family_rcv_msg+0x470/0x470
[16554.906881]  netlink_rcv_skb+0x50/0x120
[16554.906885]  genl_rcv+0x29/0x40
[16554.906890]  netlink_unicast+0x187/0x220
[16554.906896]  netlink_sendmsg+0x222/0x3e0
[16554.906902]  sock_sendmsg+0x65/0x70
[16554.906905]  ____sys_sendmsg+0x212/0x280
[16554.906910]  ___sys_sendmsg+0x88/0xd0
[16554.906915]  ? poll_select_finish+0x210/0x210
[16554.906919]  ? poll_select_finish+0x210/0x210
[16554.906922]  ? poll_select_finish+0x210/0x210
[16554.906927]  ? ep_poll+0x294/0x420
[16554.906931]  ? __fget_light+0x57/0x70
[16554.906935]  __sys_sendmsg+0x5c/0xa0
[16554.906942]  __x64_sys_sendmsg+0x1f/0x30
[16554.906950]  do_syscall_64+0x57/0x190
[16554.906956]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[16554.906963] RIP: 0033:0x7fda87f4c12d
[16554.906976] Code: Bad RIP value.
[16554.906979] RSP: 002b:00007ffca2c12840 EFLAGS: 00000293 ORIG_RAX: 
000000000000002e
[16554.906984] RAX: ffffffffffffffda RBX: 0000559237020840 RCX: 00007fda87f4c12d
[16554.906986] RDX: 0000000000000000 RSI: 00007ffca2c12890 RDI: 000000000000000b
[16554.906988] RBP: 00007ffca2c12890 R08: 0000000000000000 R09: 0000000000001000
[16554.906990] R10: 0000559236ff2010 R11: 0000000000000293 R12: 0000559237020840
[16554.906992] R13: 0000559237020980 R14: 00007fda88087280 R15: 000055923716b350
[16554.907015] INFO: task wpa_supplicant:1216 blocked for more than 120 seconds.
[16554.907020]       Tainted: G        W  OE     5.4.0-21-generic #25-Ubuntu
[16554.907022] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[16554.907025] wpa_supplicant  D    0  1216      1 0x00000000
[16554.907029] Call Trace:
[16554.907036]  __schedule+0x2e3/0x740
[16554.907042]  schedule+0x42/0xb0
[16554.907048]  schedule_preempt_disabled+0xe/0x10
[16554.907051]  __mutex_lock.isra.0+0x182/0x4f0
[16554.907057]  __mutex_lock_slowpath+0x13/0x20
[16554.907060]  mutex_lock+0x2e/0x40
[16554.907063]  rtnl_lock+0x15/0x20
[16554.907102]  nl80211_pre_doit+0x104/0x1b0 [cfg80211]
[16554.907106]  genl_family_rcv_msg+0x1a5/0x470
[16554.907112]  genl_rcv_msg+0x4c/0xa0
[16554.907117]  ? _cond_resched+0x19/0x30
[16554.907120]  ? genl_family_rcv_msg+0x470/0x470
[16554.907126]  netlink_rcv_skb+0x50/0x120
[16554.907130]  genl_rcv+0x29/0x40
[16554.907135]  netlink_unicast+0x187/0x220
[16554.907141]  netlink_sendmsg+0x222/0x3e0
[16554.907146]  sock_sendmsg+0x65/0x70
[16554.907150]  ____sys_sendmsg+0x212/0x280
[16554.907154]  ___sys_sendmsg+0x88/0xd0
[16554.907161]  ? destroy_inode+0x65/0x80
[16554.907166]  ? evict+0x14c/0x1b0
[16554.907171]  ? iput+0x148/0x210
[16554.907177]  ? _cond_resched+0x19/0x30
[16554.907183]  ? get_max_files+0x20/0x20
[16554.907189]  ? __cgroup_bpf_run_filter_setsockopt+0xae/0x2c0
[16554.907194]  ? _cond_resched+0x19/0x30
[16554.907199]  ? aa_sk_perm+0x43/0x170
[16554.907204]  __sys_sendmsg+0x5c/0xa0
[16554.907209]  __x64_sys_sendmsg+0x1f/0x30
[16554.907215]  do_syscall_64+0x57/0x190
[16554.907220]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[16554.907223] RIP: 0033:0x7fb7db08c5b7
[16554.907229] Code: Bad RIP value.
[16554.907232] RSP: 002b:00007ffda972d8f8 EFLAGS: 00000246 ORIG_RAX: 
000000000000002e
[16554.907235] RAX: ffffffffffffffda RBX: 000055b27117f590 RCX: 00007fb7db08c5b7
[16554.907237] RDX: 0000000000000000 RSI: 00007ffda972d930 RDI: 0000000000000006
[16554.907239] RBP: 000055b2711b38e0 R08: 0000000000000004 R09: 00007fb7db154b80
[16554.907241] R10: 00007ffda972da04 R11: 0000000000000246 R12: 000055b27117f4a0
[16554.907243] R13: 00007ffda972d930 R14: 00007ffda972da04 R15: 000055b2711c5dc0
[16554.907337] INFO: task DNS Resolver #7:12790 blocked for more than 120 
seconds.
[16554.907341]       Tainted: G        W  OE     5.4.0-21-generic #25-Ubuntu
[16554.907344] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[16554.907346] DNS Resolver #7 D    0 12790   2278 0x00000000
[16554.907350] Call Trace:
[16554.907357]  __schedule+0x2e3/0x740
[16554.907362]  ? fib6_table_lookup+0xf2/0x2e0
[16554.907368]  schedule+0x42/0xb0
[16554.907374]  schedule_preempt_disabled+0xe/0x10
[16554.907377]  __mutex_lock.isra.0+0x182/0x4f0
[16554.907382]  __mutex_lock_slowpath+0x13/0x20
[16554.907385]  mutex_lock+0x2e/0x40
[16554.907391]  __netlink_dump_start+0x59/0x200
[16554.907395]  rtnetlink_rcv_msg+0x23a/0x380
[16554.907399]  ? __switch_to_asm+0x34/0x70
[16554.907403]  ? rtnl_xdp_prog_skb+0x70/0x70
[16554.907406]  ? rtnl_xdp_prog_skb+0x70/0x70
[16554.907410]  ? rtnl_calcit.isra.0+0x100/0x100
[16554.907416]  netlink_rcv_skb+0x50/0x120
[16554.907420]  rtnetlink_rcv+0x15/0x20
[16554.907425]  netlink_unicast+0x187/0x220
[16554.907431]  netlink_sendmsg+0x222/0x3e0
[16554.907436]  sock_sendmsg+0x65/0x70
[16554.907440]  __sys_sendto+0x113/0x190
[16554.907446]  ? fd_install+0x27/0x30
[16554.907450]  ? __sys_socket+0x9e/0xf0
[16554.907454]  __x64_sys_sendto+0x29/0x30
[16554.907459]  do_syscall_64+0x57/0x190
[16554.907464]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[16554.907466] RIP: 0033:0x7fbe1534a6b4
[16554.907472] Code: Bad RIP value.
[16554.907474] RSP: 002b:00007fbde8868120 EFLAGS: 00000293 ORIG_RAX: 
000000000000002c
[16554.907477] RAX: ffffffffffffffda RBX: 00007fbde8869240 RCX: 00007fbe1534a6b4
[16554.907479] RDX: 0000000000000014 RSI: 00007fbde8869240 RDI: 00000000000000bb
[16554.907481] RBP: 0000000000000000 R08: 00007fbde88691e4 R09: 000000000000000c
[16554.907482] R10: 0000000000000000 R11: 0000000000000293 R12: 00007fbde88691e4
[16554.907484] R13: 00007fbde8869870 R14: 00007fbde8869200 R15: 00000000000000bb
[16554.907499] INFO: task Qt bearer threa:2770 blocked for more than 120 
seconds.
[16554.907502]       Tainted: G        W  OE     5.4.0-21-generic #25-Ubuntu
[16554.907504] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[16554.907507] Qt bearer threa D    0  2770   2278 0x00000000
[16554.907510] Call Trace:
[16554.907516]  __schedule+0x2e3/0x740
[16554.907522]  schedule+0x42/0xb0
[16554.907528]  schedule_preempt_disabled+0xe/0x10
[16554.907531]  __mutex_lock.isra.0+0x182/0x4f0
[16554.907536]  __mutex_lock_slowpath+0x13/0x20
[16554.907539]  mutex_lock+0x2e/0x40
[16554.907544]  __netlink_dump_start+0x59/0x200
[16554.907548]  rtnetlink_rcv_msg+0x23a/0x380
[16554.907552]  ? rtnl_fill_ifinfo+0xea0/0xea0
[16554.907556]  ? rtnl_fill_ifinfo+0xea0/0xea0
[16554.907559]  ? rtnl_calcit.isra.0+0x100/0x100
[16554.907565]  netlink_rcv_skb+0x50/0x120
[16554.907569]  rtnetlink_rcv+0x15/0x20
[16554.907574]  netlink_unicast+0x187/0x220
[16554.907580]  netlink_sendmsg+0x222/0x3e0
[16554.907585]  sock_sendmsg+0x65/0x70
[16554.907589]  __sys_sendto+0x113/0x190
[16554.907596]  ? fput+0x13/0x15
[16554.907600]  ? __sys_setsockopt+0x153/0x180
[16554.907604]  __x64_sys_sendto+0x29/0x30
[16554.907609]  do_syscall_64+0x57/0x190
[16554.907614]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[16554.907616] RIP: 0033:0x7fcd9a84754c
[16554.907621] Code: Bad RIP value.
[16554.907623] RSP: 002b:00007fcd7bb4a740 EFLAGS: 00000246 ORIG_RAX: 
000000000000002c
[16554.907626] RAX: ffffffffffffffda RBX: 0000000000000022 RCX: 00007fcd9a84754c
[16554.907627] RDX: 0000000000000020 RSI: 00007fcd7bb4a7d0 RDI: 0000000000000022
[16554.907629] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[16554.907631] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcd7bb4a888
[16554.907633] R13: 00007fcd7bb4a7a8 R14: 0000000000000000 R15: 00007fcd60036038
[16554.907747] INFO: task kworker/6:0:17454 blocked for more than 120 seconds.
[16554.907750]       Tainted: G        W  OE     5.4.0-21-generic #25-Ubuntu
[16554.907752] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[16554.907755] kworker/6:0     D    0 17454      2 0x80004000
[16554.907804] Workqueue: events disconnect_work [cfg80211]
[16554.907806] Call Trace:
[16554.907814]  __schedule+0x2e3/0x740
[16554.907820]  schedule+0x42/0xb0
[16554.907825]  schedule_preempt_disabled+0xe/0x10
[16554.907828]  __mutex_lock.isra.0+0x182/0x4f0
[16554.907833]  ? __switch_to_asm+0x40/0x70
[16554.907837]  ? __switch_to_asm+0x34/0x70
[16554.907841]  ? __switch_to_asm+0x34/0x70
[16554.907844]  ? __switch_to_asm+0x40/0x70
[16554.907848]  ? __switch_to_asm+0x40/0x70
[16554.907851]  __mutex_lock_slowpath+0x13/0x20
[16554.907854]  mutex_lock+0x2e/0x40
[16554.907857]  rtnl_lock+0x15/0x20
[16554.907896]  disconnect_work+0x17/0xd0 [cfg80211]
[16554.907903]  process_one_work+0x1eb/0x3b0
[16554.907908]  worker_thread+0x4d/0x400
[16554.907914]  kthread+0x104/0x140
[16554.907918]  ? process_one_work+0x3b0/0x3b0
[16554.907922]  ? kthread_park+0x90/0x90
[16554.907926]  ret_from_fork+0x35/0x40
[16554.907933] INFO: task kworker/1:1:17590 blocked for more than 120 seconds.
[16554.907936]       Tainted: G        W  OE     5.4.0-21-generic #25-Ubuntu
[16554.907939] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[16554.907942] kworker/1:1     D    0 17590      2 0x80004000
[16554.907952] Workqueue: events linkwatch_event
[16554.907955] Call Trace:
[16554.907963]  __schedule+0x2e3/0x740
[16554.907971]  schedule+0x42/0xb0
[16554.907977]  schedule_preempt_disabled+0xe/0x10
[16554.907980]  __mutex_lock.isra.0+0x182/0x4f0
[16554.907984]  ? __switch_to_asm+0x40/0x70
[16554.907988]  ? __switch_to_asm+0x34/0x70
[16554.907994]  ? __switch_to+0x7f/0x470
[16554.907997]  ? __switch_to_asm+0x40/0x70
[16554.908001]  __mutex_lock_slowpath+0x13/0x20
[16554.908004]  mutex_lock+0x2e/0x40
[16554.908007]  rtnl_lock+0x15/0x20
[16554.908011]  linkwatch_event+0xe/0x30
[16554.908016]  process_one_work+0x1eb/0x3b0
[16554.908021]  worker_thread+0x4d/0x400
[16554.908025]  kthread+0x104/0x140
[16554.908029]  ? process_one_work+0x3b0/0x3b0
[16554.908032]  ? kthread_park+0x90/0x90
[16554.908037]  ret_from_fork+0x35/0x40
[16554.908055] INFO: task kworker/6:2:17714 blocked for more than 120 seconds.
[16554.908059]       Tainted: G        W  OE     5.4.0-21-generic #25-Ubuntu
[16554.908061] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[16554.908063] kworker/6:2     D    0 17714      2 0x80004000
[16554.908112] Workqueue: events_freezable ieee80211_restart_work [mac80211]
[16554.908114] Call Trace:
[16554.908122]  __schedule+0x2e3/0x740
[16554.908128]  schedule+0x42/0xb0
[16554.908133]  schedule_preempt_disabled+0xe/0x10
[16554.908136]  __mutex_lock.isra.0+0x182/0x4f0
[16554.908141]  ? flush_workqueue_prep_pwqs+0x12e/0x140
[16554.908146]  __mutex_lock_slowpath+0x13/0x20
[16554.908149]  mutex_lock+0x2e/0x40
[16554.908151]  rtnl_lock+0x15/0x20
[16554.908184]  ieee80211_restart_work+0x5d/0xf0 [mac80211]
[16554.908189]  process_one_work+0x1eb/0x3b0
[16554.908194]  worker_thread+0x4d/0x400
[16554.908198]  kthread+0x104/0x140
[16554.908202]  ? process_one_work+0x3b0/0x3b0
[16554.908205]  ? kthread_park+0x90/0x90
[16554.908210]  ret_from_fork+0x35/0x40
[16675.735992] INFO: task NetworkManager:1178 blocked for more than 241 seconds.
[16675.736004]       Tainted: G        W  OE     5.4.0-21-generic #25-Ubuntu
[16675.736007] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[16675.736012] NetworkManager  D    0  1178      1 0x00000000
[16675.736020] Call Trace:
[16675.736039]  __schedule+0x2e3/0x740
[16675.736048]  schedule+0x42/0xb0
[16675.736057]  schedule_preempt_disabled+0xe/0x10
[16675.736062]  __mutex_lock.isra.0+0x182/0x4f0
[16675.736073]  ? kmalloc_large_node+0x88/0xa0
[16675.736079]  ? __kmalloc_node_track_caller+0x250/0x310
[16675.736085]  ? __switch_to_asm+0x34/0x70
[16675.736090]  __mutex_lock_slowpath+0x13/0x20
[16675.736094]  mutex_lock+0x2e/0x40
[16675.736100]  rtnl_lock+0x15/0x20
[16675.736181]  nl80211_dump_scan+0x34/0x160 [cfg80211]
[16675.736188]  ? __alloc_skb+0x98/0x1d0
[16675.736196]  netlink_dump+0x18b/0x390
[16675.736203]  __netlink_dump_start+0x191/0x200
[16675.736207]  genl_family_rcv_msg+0x3e9/0x470
[16675.736250]  ? nl80211_dump_survey+0x2c0/0x2c0 [cfg80211]
[16675.736257]  ? do_sys_poll+0x480/0x520
[16675.736263]  ? copyout+0x2c/0x30
[16675.736268]  genl_rcv_msg+0x4c/0xa0
[16675.736274]  ? _cond_resched+0x19/0x30
[16675.736277]  ? genl_family_rcv_msg+0x470/0x470
[16675.736283]  netlink_rcv_skb+0x50/0x120
[16675.736287]  genl_rcv+0x29/0x40
[16675.736293]  netlink_unicast+0x187/0x220
[16675.736299]  netlink_sendmsg+0x222/0x3e0
[16675.736305]  sock_sendmsg+0x65/0x70
[16675.736309]  ____sys_sendmsg+0x212/0x280
[16675.736314]  ___sys_sendmsg+0x88/0xd0
[16675.736319]  ? poll_select_finish+0x210/0x210
[16675.736323]  ? poll_select_finish+0x210/0x210
[16675.736327]  ? poll_select_finish+0x210/0x210
[16675.736332]  ? ep_poll+0x294/0x420
[16675.736336]  ? __fget_light+0x57/0x70
[16675.736340]  __sys_sendmsg+0x5c/0xa0
[16675.736346]  __x64_sys_sendmsg+0x1f/0x30
[16675.736353]  do_syscall_64+0x57/0x190
[16675.736358]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[16675.736363] RIP: 0033:0x7fda87f4c12d
[16675.736374] Code: Bad RIP value.
[16675.736377] RSP: 002b:00007ffca2c12840 EFLAGS: 00000293 ORIG_RAX: 
000000000000002e
[16675.736381] RAX: ffffffffffffffda RBX: 0000559237020840 RCX: 00007fda87f4c12d
[16675.736384] RDX: 0000000000000000 RSI: 00007ffca2c12890 RDI: 000000000000000b
[16675.736386] RBP: 00007ffca2c12890 R08: 0000000000000000 R09: 0000000000001000
[16675.736388] R10: 0000559236ff2010 R11: 0000000000000293 R12: 0000559237020840
[16675.736389] R13: 0000559237020980 R14: 00007fda88087280 R15: 000055923716b350
[16675.736415] INFO: task wpa_supplicant:1216 blocked for more than 241 seconds.
[16675.736421]       Tainted: G        W  OE     5.4.0-21-generic #25-Ubuntu
[16675.736423] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[16675.736426] wpa_supplicant  D    0  1216      1 0x00000000
[16675.736430] Call Trace:
[16675.736437]  __schedule+0x2e3/0x740
[16675.736444]  schedule+0x42/0xb0
[16675.736450]  schedule_preempt_disabled+0xe/0x10
[16675.736453]  __mutex_lock.isra.0+0x182/0x4f0
[16675.736459]  __mutex_lock_slowpath+0x13/0x20
[16675.736462]  mutex_lock+0x2e/0x40
[16675.736465]  rtnl_lock+0x15/0x20
[16675.736504]  nl80211_pre_doit+0x104/0x1b0 [cfg80211]
[16675.736509]  genl_family_rcv_msg+0x1a5/0x470
[16675.736514]  genl_rcv_msg+0x4c/0xa0
[16675.736520]  ? _cond_resched+0x19/0x30
[16675.736523]  ? genl_family_rcv_msg+0x470/0x470
[16675.736529]  netlink_rcv_skb+0x50/0x120
[16675.736533]  genl_rcv+0x29/0x40
[16675.736539]  netlink_unicast+0x187/0x220
[16675.736545]  netlink_sendmsg+0x222/0x3e0
[16675.736550]  sock_sendmsg+0x65/0x70
[16675.736554]  ____sys_sendmsg+0x212/0x280
[16675.736559]  ___sys_sendmsg+0x88/0xd0
[16675.736565]  ? destroy_inode+0x65/0x80
[16675.736570]  ? evict+0x14c/0x1b0
[16675.736576]  ? iput+0x148/0x210
[16675.736581]  ? _cond_resched+0x19/0x30
[16675.736587]  ? get_max_files+0x20/0x20
[16675.736594]  ? __cgroup_bpf_run_filter_setsockopt+0xae/0x2c0
[16675.736599]  ? _cond_resched+0x19/0x30
[16675.736604]  ? aa_sk_perm+0x43/0x170
[16675.736610]  __sys_sendmsg+0x5c/0xa0
[16675.736615]  __x64_sys_sendmsg+0x1f/0x30
[16675.736621]  do_syscall_64+0x57/0x190
[16675.736626]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[16675.736629] RIP: 0033:0x7fb7db08c5b7
[16675.736636] Code: Bad RIP value.
[16675.736638] RSP: 002b:00007ffda972d8f8 EFLAGS: 00000246 ORIG_RAX: 
000000000000002e
[16675.736642] RAX: ffffffffffffffda RBX: 000055b27117f590 RCX: 00007fb7db08c5b7
[16675.736644] RDX: 0000000000000000 RSI: 00007ffda972d930 RDI: 0000000000000006
[16675.736646] RBP: 000055b2711b38e0 R08: 0000000000000004 R09: 00007fb7db154b80
[16675.736648] R10: 00007ffda972da04 R11: 0000000000000246 R12: 000055b27117f4a0
[16675.736650] R13: 00007ffda972d930 R14: 00007ffda972da04 R15: 000055b2711c5dc0
[16675.736740] INFO: task DNS Resolver #7:12790 blocked for more than 241 
seconds.
[16675.736744]       Tainted: G        W  OE     5.4.0-21-generic #25-Ubuntu
[16675.736746] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[16675.736749] DNS Resolver #7 D    0 12790   2278 0x00000000
[16675.736753] Call Trace:
[16675.736760]  __schedule+0x2e3/0x740
[16675.736765]  ? fib6_table_lookup+0xf2/0x2e0
[16675.736771]  schedule+0x42/0xb0
[16675.736777]  schedule_preempt_disabled+0xe/0x10
[16675.736781]  __mutex_lock.isra.0+0x182/0x4f0
[16675.736788]  __mutex_lock_slowpath+0x13/0x20
[16675.736792]  mutex_lock+0x2e/0x40
[16675.736801]  __netlink_dump_start+0x59/0x200
[16675.736807]  rtnetlink_rcv_msg+0x23a/0x380
[16675.736812]  ? __switch_to_asm+0x34/0x70
[16675.736816]  ? rtnl_xdp_prog_skb+0x70/0x70
[16675.736821]  ? rtnl_xdp_prog_skb+0x70/0x70
[16675.736830]  ? rtnl_calcit.isra.0+0x100/0x100
[16675.736836]  netlink_rcv_skb+0x50/0x120
[16675.736840]  rtnetlink_rcv+0x15/0x20
[16675.736845]  netlink_unicast+0x187/0x220
[16675.736851]  netlink_sendmsg+0x222/0x3e0
[16675.736857]  sock_sendmsg+0x65/0x70
[16675.736861]  __sys_sendto+0x113/0x190
[16675.736868]  ? fd_install+0x27/0x30
[16675.736872]  ? __sys_socket+0x9e/0xf0
[16675.736876]  __x64_sys_sendto+0x29/0x30
[16675.736882]  do_syscall_64+0x57/0x190
[16675.736886]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[16675.736889] RIP: 0033:0x7fbe1534a6b4
[16675.736896] Code: Bad RIP value.
[16675.736898] RSP: 002b:00007fbde8868120 EFLAGS: 00000293 ORIG_RAX: 
000000000000002c
[16675.736901] RAX: ffffffffffffffda RBX: 00007fbde8869240 RCX: 00007fbe1534a6b4
[16675.736903] RDX: 0000000000000014 RSI: 00007fbde8869240 RDI: 00000000000000bb
[16675.736906] RBP: 0000000000000000 R08: 00007fbde88691e4 R09: 000000000000000c
[16675.736908] R10: 0000000000000000 R11: 0000000000000293 R12: 00007fbde88691e4
[16675.736909] R13: 00007fbde8869870 R14: 00007fbde8869200 R15: 00000000000000bb
[16987.865772] perf: interrupt took too long (3984 > 3980), lowering 
kernel.perf_event_max_sample_rate to 50000

I had to use the power button to reboot my computer. I could not do this
from the UI or cli.

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https://bugs.launchpad.net/bugs/1872351

Title:
  Qualcomm Atheros QCA6174 Killer 1435 Wireless-AC: Disabling wifi
  causes kernel warning in __sta_info_destroy_part2

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I have multiple issues with wifi on my Dell XPS 9380.
  This error was triggered when I tried to disable my wifi.

  [ 3634.322471] ------------[ cut here ]------------
  [ 3634.322524] WARNING: CPU: 3 PID: 1188 at net/mac80211/sta_info.c:1057 
__sta_info_destroy_part2+0x14e/0x160 [mac80211]
  [ 3634.322525] Modules linked in: rfcomm vboxnetadp(OE) vboxnetflt(OE) 
vboxdrv(OE) ccm typec_displayport cmac algif_hash algif_skcipher af_alg bnep 
binfmt_misc nls_iso8859_1 mei_hdcp intel_rapl_msr snd_hda_codec_hdmi 
dell_laptop snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio 
snd_hda_intel snd_intel_nhlt snd_hda_codec snd_hda_core snd_usb_audio 
ath10k_pci x86_pkg_temp_thermal snd_usbmidi_lib snd_seq_midi snd_hwdep 
snd_seq_midi_event ath10k_core intel_powerclamp coretemp cdc_ether snd_rawmidi 
usbnet btusb kvm_intel r8152 ath btrtl mii btbcm kvm snd_seq uvcvideo 
videobuf2_vmalloc btintel videobuf2_memops intel_cstate videobuf2_v4l2 joydev 
snd_seq_device snd_pcm dell_wmi intel_rapl_perf videobuf2_common bluetooth 
mac80211 dell_smbios videodev snd_timer dcdbas mc input_leds ecdh_generic ecc 
wmi_bmof snd dell_wmi_descriptor serio_raw intel_wmi_thunderbolt cfg80211 
soundcore rtsx_pci_ms libarc4 memstick hid_multitouch processor_thermal_device 
ucsi_acpi typec_ucsi mei_me intel_rapl_common
  [ 3634.322564]  intel_xhci_usb_role_switch mei typec intel_soc_dts_iosf 
intel_pch_thermal roles int3403_thermal int340x_thermal_zone int3400_thermal 
mac_hid acpi_pad intel_hid acpi_thermal_rel sparse_keymap sch_fq_codel 
parport_pc ppdev lp parport ip_tables x_tables autofs4 mmc_block dm_crypt 
usbhid hid_generic crct10dif_pclmul crc32_pclmul rtsx_pci_sdmmc i915 
ghash_clmulni_intel aesni_intel crypto_simd cryptd i2c_algo_bit glue_helper 
drm_kms_helper psmouse syscopyarea sysfillrect nvme sysimgblt i2c_i801 
fb_sys_fops nvme_core drm intel_lpss_pci rtsx_pci intel_lpss idma64 i2c_hid 
virt_dma wmi hid pinctrl_sunrisepoint video pinctrl_intel
  [ 3634.322599] CPU: 3 PID: 1188 Comm: NetworkManager Tainted: G           OE  
   5.4.0-21-generic #25-Ubuntu
  [ 3634.322600] Hardware name: Dell Inc. XPS 13 9370/0F6P3V, BIOS 1.12.1 
12/11/2019
  [ 3634.322633] RIP: 0010:__sta_info_destroy_part2+0x14e/0x160 [mac80211]
  [ 3634.322635] Code: 24 0c 01 00 00 00 0f 84 52 ff ff ff 45 31 c0 b9 01 00 00 
00 4c 89 e2 48 89 de 4c 89 ef e8 0a a6 ff ff 85 c0 0f 84 34 ff ff ff <0f> 0b e9 
2d ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00
  [ 3634.322636] RSP: 0018:ffffa70c009c3918 EFLAGS: 00010282
  [ 3634.322638] RAX: 00000000ffffff94 RBX: ffff9006104cc8c0 RCX: 
0000000000000000
  [ 3634.322640] RDX: ffff90061ba3c740 RSI: 0000000000000000 RDI: 
ffff900613a62f48
  [ 3634.322641] RBP: ffffa70c009c3938 R08: ffff90061e4d78c8 R09: 
0000000000000004
  [ 3634.322642] R10: 0000000000000000 R11: 0000000000000000 R12: 
ffff900613f28000
  [ 3634.322643] R13: ffff900613a607a0 R14: ffff9006104cc8c0 R15: 
ffff900613a60d68
  [ 3634.322644] FS:  00007f596b396240(0000) GS:ffff90061e4c0000(0000) 
knlGS:0000000000000000
  [ 3634.322645] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  [ 3634.322646] CR2: 00000db00945f000 CR3: 0000000494824005 CR4: 
00000000003606e0
  [ 3634.322647] Call Trace:
  [ 3634.322670]  __sta_info_flush+0x128/0x180 [mac80211]
  [ 3634.322696]  ieee80211_set_disassoc+0xc0/0x5f0 [mac80211]
  [ 3634.322719]  ieee80211_mgd_deauth+0x104/0x490 [mac80211]
  [ 3634.322743]  ieee80211_deauth+0x18/0x20 [mac80211]
  [ 3634.322782]  cfg80211_mlme_deauth+0xb6/0x1e0 [cfg80211]
  [ 3634.322804]  cfg80211_mlme_down+0x66/0x80 [cfg80211]
  [ 3634.322823]  cfg80211_disconnect+0x127/0x1e0 [cfg80211]
  [ 3634.322827]  ? _raw_spin_unlock_bh+0x1e/0x20
  [ 3634.322845]  __cfg80211_leave+0x133/0x1b0 [cfg80211]
  [ 3634.322862]  cfg80211_leave+0x2c/0x40 [cfg80211]
  [ 3634.322879]  cfg80211_netdev_notifier_call+0x1b2/0x590 [cfg80211]
  [ 3634.322902]  ? ath10k_warn.cold+0x1a/0x1f [ath10k_core]
  [ 3634.322911]  ? ath10k_config_ps+0x52/0x70 [ath10k_core]
  [ 3634.322913]  ? rtnl_is_locked+0x15/0x20
  [ 3634.322917]  ? inetdev_event+0x47/0x560
  [ 3634.322919]  ? skb_dequeue+0x5a/0x70
  [ 3634.322923]  notifier_call_chain+0x55/0x80
  [ 3634.322925]  raw_notifier_call_chain+0x16/0x20
  [ 3634.322927]  call_netdevice_notifiers_info+0x2e/0x60
  [ 3634.322929]  __dev_close_many+0x63/0x120
  [ 3634.322931]  dev_close_many+0x91/0x150
  [ 3634.322933]  dev_close.part.0+0x4a/0x70
  [ 3634.322936]  dev_close+0x18/0x20
  [ 3634.322955]  cfg80211_shutdown_all_interfaces+0x77/0xd0 [cfg80211]
  [ 3634.322971]  cfg80211_rfkill_set_block+0x26/0x30 [cfg80211]
  [ 3634.322974]  rfkill_set_block+0x9b/0x150
  [ 3634.322976]  rfkill_fop_write+0x136/0x1e0
  [ 3634.322979]  __vfs_write+0x1b/0x40
  [ 3634.322981]  vfs_write+0xb9/0x1a0
  [ 3634.322983]  ksys_write+0xb1/0xe0
  [ 3634.322985]  __x64_sys_write+0x1a/0x20
  [ 3634.322988]  do_syscall_64+0x57/0x190
  [ 3634.322991]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
  [ 3634.322993] RIP: 0033:0x7f596c8062cf
  [ 3634.322995] 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
  [ 3634.322996] RSP: 002b:00007ffc165340c0 EFLAGS: 00000293 ORIG_RAX: 
0000000000000001
  [ 3634.322998] RAX: ffffffffffffffda RBX: 0000559d02bf45c5 RCX: 
00007f596c8062cf
  [ 3634.322999] RDX: 0000000000000008 RSI: 00007ffc165340f8 RDI: 
0000000000000020
  [ 3634.323000] RBP: 0000000000000020 R08: 0000000000000000 R09: 
0000000000000001
  [ 3634.323001] R10: 0000000000000000 R11: 0000000000000293 R12: 
0000559d03d01040
  [ 3634.323002] R13: 0000000000000000 R14: 0000000000000000 R15: 
0000559d03cf8820
  [ 3634.323004] ---[ end trace 3dc4d97c4ae22dea ]---

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: linux-image-5.4.0-21-generic 5.4.0-21.25
  ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
  Uname: Linux 5.4.0-21-generic x86_64
  ApportVersion: 2.20.11-0ubuntu26
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  nikolaj    1961 F.... pulseaudio
   /dev/snd/controlC0:  nikolaj    1961 F.... pulseaudio
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Apr 12 22:42:46 2020
  InstallationDate: Installed on 2019-11-15 (149 days ago)
  InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
  MachineType: Dell Inc. XPS 13 9370
  ProcFB: 0 i915drmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-21-generic 
root=/dev/mapper/vgubuntu-root ro quiet splash mem_sleep_default=deep 
vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-5.4.0-21-generic N/A
   linux-backports-modules-5.4.0-21-generic  N/A
   linux-firmware                            1.187
  SourcePackage: linux
  UpgradeStatus: Upgraded to focal on 2020-04-04 (8 days ago)
  dmi.bios.date: 12/11/2019
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.12.1
  dmi.board.name: 0F6P3V
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 10
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvr1.12.1:bd12/11/2019:svnDellInc.:pnXPS139370:pvr:rvnDellInc.:rn0F6P3V:rvrA00:cvnDellInc.:ct10:cvr:
  dmi.product.family: XPS
  dmi.product.name: XPS 13 9370
  dmi.product.sku: 07E6
  dmi.sys.vendor: Dell Inc.

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