[Bug 222250] New: v7.4-rc2: Bluetooth: hci0: Opcode 0x041a failed: -22

[Bug 222250] New: v7.4-rc2: Bluetooth: hci0: Opcode 0x041a failed: -22

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=222250

            Bug ID: 222250
           Summary: v7.4-rc2: Bluetooth: hci0: Opcode 0x041a failed: -22
           Product: Drivers
           Version: 2.5
    Kernel Version: v7.4-rc2
          Hardware: AMD
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Bluetooth
          Assignee: linux-bluetooth@vger.kernel.org
          Reporter: frc.gabriel@gmail.com
        Regression: Yes

Hi, good morning,


I just booted v7.4-rc2 and noticed that bluetooth no longer connects to paired
headphones. Removing + trying to repair doesn't work either.


Dmesg shows:


root@localhost:~# journalctl -b -1 | grep -i "Opcode 0x041a failed:" -A2 -B100
| grep -i "kernel\|bluetooth"
Nov 09 09:50:45 localhost kernel: Bluetooth: hci0: Loading BT firmware:
mediatek/mt7925/BT_RAM_CODE_MT7925_1_1_hdr.bin
Nov 09 09:50:45 localhost kernel: Bluetooth: hci0: BT HW ver: 0x7925, SW ver:
0x0000, Build Time: 20260813113236
Nov 09 09:50:46 localhost kernel: Bluetooth: hci0: Device setup in 349484 usecs
Nov 09 09:50:46 localhost kernel: Bluetooth: hci0: HCI Enhanced Setup
Synchronous Connection command is advertised, but not supported.
Nov 09 09:50:54 localhost bluetoothd[7697]: src/service.c:btd_service_connect()
a2dp-sink profile connect failed for XX:XX:XX:XX:XX:XX: Protocol not available
Nov 09 09:51:57 localhost bluetoothd[7697]: src/service.c:btd_service_connect()
a2dp-sink profile connect failed for XX:XX:XX:XX:XX:XX:: Protocol not available
Nov 09 09:51:58 localhost bluetoothd[7697]: src/service.c:btd_service_connect()
a2dp-sink profile connect failed for XX:XX:XX:XX:XX:XX:: Protocol not available
Nov 09 09:51:58 localhost bluetoothd[7697]: src/service.c:btd_service_connect()
a2dp-sink profile connect failed for XX:XX:XX:XX:XX:XX:: Protocol not available
Nov 09 09:51:59 localhost bluetoothd[7697]: src/service.c:btd_service_connect()
a2dp-sink profile connect failed for XX:XX:XX:XX:XX:XX:: Protocol not available
Nov 09 09:51:59 localhost bluetoothd[7697]: src/service.c:btd_service_connect()
a2dp-sink profile connect failed for XX:XX:XX:XX:XX:XX:: Protocol not available
Nov 09 09:52:00 localhost bluetoothd[7697]: src/service.c:btd_service_connect()
a2dp-sink profile connect failed for XX:XX:XX:XX:XX:XX:: Protocol not available
Nov 09 09:52:00 localhost bluetoothd[7697]: src/service.c:btd_service_connect()
a2dp-sink profile connect failed for XX:XX:XX:XX:XX:XX:: Protocol not available
Nov 09 09:52:02 localhost kernel: Bluetooth: hci0: Opcode 0x041a failed: -22
Nov 09 09:52:07 localhost bluetoothd[7697]: src/service.c:btd_service_connect()
a2dp-sink profile connect failed for XX:XX:XX:XX:XX:XX:: Protocol not available
Nov 09 09:52:07 localhost kernel: Bluetooth: hci0: Opcode 0x041a failed: -22


It works OK with v7.4-rc1.

Greetings,
Gabriel Francisco

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[Bug 222250] v7.4-rc2: Bluetooth: hci0: Opcode 0x041a failed: -22

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=222250

Artem S. Tashkinov (aros@gmx.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO

--- Comment #1 from Artem S. Tashkinov (aros@gmx.com) ---
Since you're willing to test development snapshots, why not go further and
bisect?

https://docs.kernel.org/admin-guide/bug-bisect.html

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[Bug 222250] v7.4-rc2: Bluetooth: hci0: Opcode 0x041a failed: -22

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=222250

--- Comment #2 from Gabriel Francisco (fgbreel@posteo.com) ---
I just got the time to finish bisecting and this is the result:

git bisect start
# status: waiting for both good and bad commits
# good: [6628e7d4c6b25c8d18f1345e3a20d21829aae7e4] Linux 7.4-rc1
git bisect good 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4
# status: waiting for bad commit, 1 good commit known
# bad: [7475ea8b58616b33c04afb976cf0fbaad9dd63fb] Linux 7.4-rc2
git bisect bad 7475ea8b58616b33c04afb976cf0fbaad9dd63fb
# good: [f66469d9905b39d2c260a15d7d6db450f4db67c1] Merge tag 'net-7.4-rc2' of
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
git bisect good f66469d9905b39d2c260a15d7d6db450f4db67c1
# good: [543b7d2ca09b4b08d518d668ac2fdc361f231785] Merge tag
'drm-fixes-2026-11-07' of https://gitlab.freedesktop.org/drm/kernel
git bisect good 543b7d2ca09b4b08d518d668ac2fdc361f231785
# good: [a41e364995bbcfa627418a70fe913c35b7510728] Merge tag 'scsi-fixes' of
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
git bisect good a41e364995bbcfa627418a70fe913c35b7510728
# good: [2ebb9de23bbd942b1a2431384e4a62908c31bb2a] Merge tag
'sched-urgent-2026-11-08' of
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 2ebb9de23bbd942b1a2431384e4a62908c31bb2a
# good: [2651f6deb3326129a052897df193052dc28ea94f] Merge tag 'mips-fixes_7.4_1'
of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux
git bisect good 2651f6deb3326129a052897df193052dc28ea94f
# good: [a4845f077415ef32fe672c841e2fc58ae9e28273] ata: libata-scsi: reject
data-in commands with a data-out buffer
git bisect good a4845f077415ef32fe672c841e2fc58ae9e28273
# good: [8a65162514fbad21a2c58ffed65f42b27e92b163] Merge tag
'driver-core-7.4-rc2' of
git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core
git bisect good 8a65162514fbad21a2c58ffed65f42b27e92b163
# good: [bcd347f31e84ecfb1e45be488b1c7c835b8feb4c] coccinelle: kmalloc_obj:
Include devm_kmalloc_obj conversion rules
git bisect good bcd347f31e84ecfb1e45be488b1c7c835b8feb4c
# bad: [e0d8e8de8bcb1ef7b749033b5af5518ba8df7bec] Merge tag
'devm_kmalloc_obj-v7.4-rc2' of
git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux
git bisect bad e0d8e8de8bcb1ef7b749033b5af5518ba8df7bec
# bad: [4dd10fbbeb9c33709edc89916e19c03c780a0751] treewide: Convert
devm_kmalloc() family to the devm_kmalloc_obj() family
git bisect bad 4dd10fbbeb9c33709edc89916e19c03c780a0751
# first bad commit: [4dd10fbbeb9c33709edc89916e19c03c780a0751] treewide:
Convert devm_kmalloc() family to the devm_kmalloc_obj() family


I also booted v7.4-rc2 once more to double check and this time I got a kernel
oops with a bit more info:

[   15.592533] BUG: kernel NULL pointer dereference, address: 0000000000000018
[   15.592546] #PF: supervisor write access in kernel mode
[   15.592549] #PF: error_code(0x0002) - not-present page
[   15.592552] PGD 0 P4D 0 
[   15.592558] Oops: Oops: 0002 [#1] SMP NOPTI
[   15.592563] CPU: 14 UID: 60580 PID: 1634 Comm: wireplumber Not tainted
7.4.0-rc2 #45 PREEMPT(lazy) 
[   15.592569] Hardware name: LENOVO 21QL003UGE/21QL003UGE, BIOS R2XET39W (1.19
) 03/19/2026
[   15.592572] RIP: 0010:acp_dmic_dai_startup+0x2d/0x70 [snd_acp_pdm]
[   15.592579] Code: fa 0f 1f 44 00 00 48 8b 87 c0 00 00 00 48 8b 90 a0 01 00
00 48 8b 46 70 48 be 00 00 00 02 00 04 00 00 48 8b 40 10 48 8b 40 70 <48> c7 42
18 00 00 01 00 48 89 72 30 48 8b 50 48 48 8b 48 28 8b 52
[   15.592582] RSP: 0018:ffffce5188357a48 EFLAGS: 00010286
[   15.592585] RAX: ffff8b4246cde500 RBX: 0000000000000000 RCX:
ffff8b42428b7000
[   15.592588] RDX: 0000000000000000 RSI: 0000040002000000 RDI:
ffff8b42428b7000
[   15.592590] RBP: ffff8b424576e838 R08: ffffffffc2ee5390 R09:
0000000000000002
[   15.592592] R10: 00000000ffffffff R11: ffff8b426494fc00 R12:
ffff8b42428b7000
[   15.592593] R13: 0000000000000000 R14: ffff8b424576e838 R15:
ffff8b424576eee8
[   15.592595] FS:  00007fd67f32cc80(0000) GS:ffff8b48e84e5000(0000)
knlGS:0000000000000000
[   15.592598] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   15.592600] CR2: 0000000000000018 CR3: 0000000188d05000 CR4:
0000000000f50ef0
[   15.592602] PKRU: 55555554
[   15.592604] Call Trace:
[   15.592605]  <TASK>
[   15.592608]  snd_soc_dai_startup+0x5d/0xa0 [snd_soc_core]
[   15.592642]  __soc_pcm_open+0x124/0x6b0 [snd_soc_core]
[   15.592665]  ? snd_refcount_init+0x2a/0x40 [snd]
[   15.592676]  soc_pcm_open+0x2a/0x50 [snd_soc_core]
[   15.592694]  snd_pcm_open_substream+0x57b/0x9c0 [snd_pcm]
[   15.592706]  ? snd_card_file_add+0x109/0x140 [snd]
[   15.592714]  ? add_wait_queue+0x6d/0xa0
[   15.592722]  snd_pcm_open+0x13d/0x310 [snd_pcm]
[   15.592730]  ? __pfx_default_wake_function+0x10/0x10
[   15.592737]  snd_pcm_capture_open+0x3c/0x60 [snd_pcm]
[   15.592745]  chrdev_open+0xc7/0x290
[   15.592751]  ? __pfx_chrdev_open+0x10/0x10
[   15.592755]  do_dentry_open+0x123/0x470
[   15.592760]  vfs_open_consume+0x3f/0x100
[   15.592764]  path_openat+0x48d/0xb90
[   15.592770]  do_file_open+0xe7/0x1a0
[   15.592775]  ? do_getname+0x62/0x1c0
[   15.592778]  do_sys_openat2+0xa5/0xe0
[   15.592783]  __x64_sys_openat+0x61/0xa0
[   15.592787]  do_syscall_64+0xc1/0x580
[   15.592791]  ? kmem_cache_free+0x288/0x480
[   15.592796]  ? __x64_sys_close+0x47/0xa0
[   15.592799]  ? trace_syscall_exit+0x5e/0xa0
[   15.592803]  ? do_syscall_64+0xfe/0x580
[   15.592805]  ? __x64_sys_openat+0x61/0xa0
[   15.592809]  ? trace_syscall_exit+0x5e/0xa0
[   15.592811]  ? do_syscall_64+0xfe/0x580
[   15.592813]  ? do_syscall_64+0x37/0x580
[   15.592815]  entry_SYSCALL_64_after_hwframe+0x76/0x7e
[   15.592819] RIP: 0033:0x7fd67f8eaefe
[   15.592841] Code: 08 0f 85 35 4a ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce
4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 90 48
83 ec 08 bf 01 00 00 00 e8 a2 dc 05 00 bf 01 00 00 00 89
[   15.592843] RSP: 002b:00007ffd5eabeb88 EFLAGS: 00000246 ORIG_RAX:
0000000000000101
[   15.592847] RAX: ffffffffffffffda RBX: 00000000ffffffff RCX:
00007fd67f8eaefe
[   15.592848] RDX: 0000000000080802 RSI: 00007ffd5eabed90 RDI:
ffffffffffffff9c
[   15.592850] RBP: 0000000000000004 R08: 0000000000000000 R09:
0000000000000000
[   15.592851] R10: 0000000000000000 R11: 0000000000000246 R12:
0000000000080802
[   15.592853] R13: 00007ffd5eabed90 R14: 00007ffd5eabf0b0 R15:
0000000000000002
[   15.592856]  </TASK>
[   15.592858] Modules linked in: nft_queue nft_ct nfnetlink_queue tcp_diag
inet_diag overlay qrtr algif_hash algif_skcipher af_alg bnep binfmt_misc
nft_chain_nat xt_MASQUERADE nf_nat xt_addrtype xt_tcpudp xt_conntrack
nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 nft_compat x_tables nf_tables
nls_ascii nls_cp437 vfat fat snd_acp_legacy_mach snd_acp_mach snd_soc_nau8821
intel_rapl_msr intel_rapl_common snd_acp3x_rn snd_acp70 snd_acp_i2s snd_acp_pdm
snd_acp_pcm snd_soc_dmic mt7925e snd_sof_amd_rembrandt snd_hda_codec_alc269
mt7925_common snd_sof_amd_acp snd_sof_pci snd_hda_codec_realtek_lib
snd_sof_xtensa_dsp edac_mce_amd mt792x_lib snd_hda_scodec_component btusb
snd_sof snd_hda_codec_generic btmtk snd_hda_codec_atihdmi mt76_connac_lib
uvcvideo snd_hda_codec_hdmi btrtl snd_sof_utils kvm_amd mt76 snd_pci_acp7x
btbcm videobuf2_vmalloc snd_pci_ps btintel uvc snd_soc_acpi_amd_match
videobuf2_memops mac80211 snd_soc_sdca videobuf2_v4l2 amdxdna snd_hda_intel
snd_soc_core videodev snd_hda_codec bluetooth kvm think_lmi gpio_keys
[   15.592902]  videobuf2_common snd_ctl_led snd_hda_core snd_compress cfg80211
snd_pcm_dmaengine mc snd_acp_pci irqbypass snd_intel_dspcfg rapl
snd_amd_acpi_mach pcspkr snd_acp_legacy_common snd_intel_sdw_acpi snd_hwdep
snd_pci_acp6x wmi_bmof firmware_attributes_class thinkpad_acpi snd_pcm spd5118
amd_pmf nvram snd_timer drm_shmem_helper sparse_keymap k10temp ac snd_pci_acp5x
amdtee snd_rn_pci_acp3x snd rfkill snd_acp_config amd_sfh libarc4 ccp
snd_soc_acpi soundcore snd_pci_acp3x tee soc_button_array amd_pmc joydev evdev
lp ppdev parport_pc i2c_dev parport msr nvme_fabrics efi_pstore autofs4 ext4
mbcache jbd2 btrfs libblake2b dm_crypt dm_mod raid10 raid456 async_raid6_recov
async_memcpy async_pq async_xor async_tx raid6_pq xor raid1 raid0 md_mod amdgpu
drm_buddy amdxcp drm_panel_backlight_quirks gpu_sched ucsi_acpi drm_ttm_helper
typec_ucsi ttm hid_multitouch typec drm_exec i2c_algo_bit hid_generic roles
drm_suballoc_helper drm_display_helper i2c_hid_acpi i2c_hid cec hid rc_core
xhci_pci drm_client_lib drm_panel
[   15.592933]  xhci_hcd drm_kms_helper r8169 psmouse aesni_intel realtek drm
thunderbolt nvme phy_package gf128mul serio_raw usbcore video battery phylink
nvme_core sp5100_tco mdio_devres watchdog libphy configfs nvme_keyring fan
crc16 i2c_piix4 nvme_auth mdio_bus wmi button usb_common i2c_smbus efivarfs
[   15.592945] CR2: 0000000000000018
[   15.592947] ---[ end trace 0000000000000000 ]---
[   15.939478] RIP: 0010:acp_dmic_dai_startup+0x2d/0x70 [snd_acp_pdm]
[   15.939486] Code: fa 0f 1f 44 00 00 48 8b 87 c0 00 00 00 48 8b 90 a0 01 00
00 48 8b 46 70 48 be 00 00 00 02 00 04 00 00 48 8b 40 10 48 8b 40 70 <48> c7 42
18 00 00 01 00 48 89 72 30 48 8b 50 48 48 8b 48 28 8b 52
[   15.939487] RSP: 0018:ffffce5188357a48 EFLAGS: 00010286
[   15.939488] RAX: ffff8b4246cde500 RBX: 0000000000000000 RCX:
ffff8b42428b7000
[   15.939489] RDX: 0000000000000000 RSI: 0000040002000000 RDI:
ffff8b42428b7000
[   15.939490] RBP: ffff8b424576e838 R08: ffffffffc2ee5390 R09:
0000000000000002
[   15.939490] R10: 00000000ffffffff R11: ffff8b426494fc00 R12:
ffff8b42428b7000
[   15.939491] R13: 0000000000000000 R14: ffff8b424576e838 R15:
ffff8b424576eee8
[   15.939492] FS:  00007fd67f32cc80(0000) GS:ffff8b48e84e5000(0000)
knlGS:0000000000000000
[   15.939493] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   15.939493] CR2: 0000000000000018 CR3: 0000000188d05000 CR4:
0000000000f50ef0
[   15.939494] PKRU: 55555554
[   15.939495] note: wireplumber[1634] exited with irqs disabled


It does look similar to bug bugzilla.kernel.org/show_bug.cgi?id=222249 which
was reported a few minutes before this one and has a patch mentioned in a
comment there.

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[Bug 222250] v7.4-rc2: Bluetooth: hci0: Opcode 0x041a failed: -22

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=222250

Gabriel Francisco (fgbreel@posteo.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
 Bisected commit-id|                            |4dd10fbbeb9c33709edc89916e1
                   |                            |9c03c780a0751

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[Bug 222250] v7.4-rc2: Bluetooth: hci0: Opcode 0x041a failed: -22

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=222250

Gabriel Francisco (fgbreel@posteo.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #3 from Gabriel Francisco (fgbreel@posteo.com) ---
The patch mentioned in https://bugzilla.kernel.org/show_bug.cgi?id=222249#c1
does solve this bug.

Marking this one as duplicate.

Thanks,
Gabriel

*** This bug has been marked as a duplicate of bug 222249 ***

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