Bluetooth: hci4: Opcode 0x0c1a failed: -4
Bluetooth: hci4: Error when powering off device on rfkill (-4)
------------[ cut here ]------------
WARNING: CPU: 0 PID: 7987 at kernel/kcov.c:872 kcov_remote_start+0xf7/0x6d0 kernel/kcov.c:872
Modules linked in:
CPU: 0 UID: 0 PID: 7987 Comm: syz.4.595 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:kcov_remote_start+0xf7/0x6d0 kernel/kcov.c:872
Code: 65 4c 8b 3d 23 a5 1a 12 4d 89 7c 24 28 8b 95 18 16 00 00 65 8b 05 29 a5 1a 12 a9 00 01 ff 00 75 53 81 e2 ff ff ff bf 74 4b 90 <0f> 0b 90 e8 81 29 d8 09 44 8b 1d 5a 15 2a 19 89 c0 48 03 1c c5 60
RSP: 0018:ffffc90004a3f490 EFLAGS: 00010002
RAX: 0000000080000200 RBX: ffffffff93d6c948 RCX: 0000000000000001
RDX: 0000000000000002 RSI: ffffffff8de2a820 RDI: ffffffff8c162900
RBP: ffff888034e48000 R08: 95645fb723e96674 R09: 0000000000000023
R10: ffffc90004a3f348 R11: 0000000000000000 R12: ffff8880b8428948
R13: 0000000000000200 R14: 0000000000000000 R15: ffff888034e48000
FS:  00007fc57725e6c0(0000) GS:ffff8881246bc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8a2aa5bfeb CR3: 000000001c76b000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 kcov_remote_start_common include/linux/kcov.h:50 [inline]
 ieee80211_rx_list+0x45f/0x2980 net/mac80211/rx.c:5405
 ieee80211_rx_napi+0xdc/0x410 net/mac80211/rx.c:5446
 ieee80211_rx include/net/mac80211.h:5210 [inline]
 ieee80211_handle_queued_frames+0xd5/0x130 net/mac80211/main.c:453
 ieee80211_stop_device+0x32/0x110 net/mac80211/util.c:1563
 ieee80211_do_stop+0x1ac8/0x2520 net/mac80211/iface.c:721
 ieee80211_stop+0x169/0x320 net/mac80211/iface.c:814
 __dev_close_many+0x298/0x760 net/core/dev.c:1755
 netif_close_many+0x233/0x630 net/core/dev.c:1780
 netif_close net/core/dev.c:1797 [inline]
 netif_close+0x17f/0x230 net/core/dev.c:1791
 dev_close+0xaa/0x240 net/core/dev_api.c:220
 cfg80211_shutdown_all_interfaces+0x9a/0x220 net/wireless/core.c:277
 cfg80211_rfkill_set_block net/wireless/core.c:307 [inline]
 cfg80211_rfkill_set_block+0x35/0x50 net/wireless/core.c:299
 rfkill_set_block+0x1fb/0x550 net/rfkill/core.c:346
 rfkill_fop_write+0x2c0/0x580 net/rfkill/core.c:1301
 vfs_write+0x29d/0x11d0 fs/read_write.c:684
 ksys_write+0x1f8/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc57638ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc57725e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fc5765b5fa0 RCX: 00007fc57638ebe9
RDX: 0000000000000008 RSI: 0000200000000080 RDI: 0000000000000005
RBP: 00007fc576411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc5765b6038 R14: 00007fc5765b5fa0 R15: 00007ffe9ce927c8
 </TASK>