[Bug 215713] New: New (useless?) warning messages from BlueTooth in kernel 5.17

[Bug 215713] New: New (useless?) warning messages from BlueTooth in kernel 5.17

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=215713

            Bug ID: 215713
           Summary: New (useless?) warning messages from BlueTooth in
                    kernel 5.17
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.17
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: low
          Priority: P1
         Component: Bluetooth
          Assignee: linux-bluetooth@vger.kernel.org
          Reporter: aros@gmx.com
        Regression: No

I've just upgraded from 5.15.30 to 5.17 and now upon pairing my BT headphones I
see brand new warning messages I've never seen before:

Bluetooth: hci0: unexpected event 0xff length: 25 > 0
Bluetooth: hci0: unexpected event 0xff length: 4 > 0

I wonder if it's a kernel bug or it's a valid message. 

The BT headphones work without any issues though.

The device is 8087:0025 Intel Corp. Wireless-AC 9260 Bluetooth Adapter.

# lsmod | grep bt
btusb                  40960  0
btbcm                  20480  1 btusb
btintel                32768  1 btusb
bluetooth             471040  52 btintel,btbcm,bnep,btusb,rfcomm

# dmesg -t | egrep -i "bt|blue" 
Bluetooth: Core ver 2.22
NET: Registered PF_BLUETOOTH protocol family
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: L2CAP socket layer initialized
Bluetooth: SCO socket layer initialized
usbcore: registered new interface driver btusb
Bluetooth: hci0: Found device firmware: intel/ibt-18-16-1.sfi
Bluetooth: hci0: Boot Address: 0x40800
Bluetooth: hci0: Firmware Version: 86-46.21
Bluetooth: hci0: Firmware already loaded
Bluetooth: BNEP (Ethernet Emulation) ver 1.3
Bluetooth: BNEP socket layer initialized
Bluetooth: RFCOMM TTY layer initialized
Bluetooth: RFCOMM socket layer initialized
Bluetooth: RFCOMM ver 1.11
Bluetooth: hci0: unexpected event 0xff length: 25 > 0
Bluetooth: hci0: unexpected event 0xff length: 4 > 0

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[Bug 215713] New (useless?) warning messages from BlueTooth in kernel 5.17

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=215713

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Regression|No                          |Yes

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[Bug 215713] New (useless?) warning messages from BlueTooth in kernel 5.17

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=215713

Luiz Von Dentz (luiz.dentz@gmail.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |luiz.dentz@gmail.com

--- Comment #1 from Luiz Von Dentz (luiz.dentz@gmail.com) ---
https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/net/bluetooth/hci_event.c?id=314d8cd2787418c5ac6b02035c344644f47b292b

It haven't made to 5.17 though but it is already fixed in bluetooth-next.

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[Bug 215713] New (useless?) warning messages from BlueTooth in kernel 5.17

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=215713

--- Comment #2 from Artem S. Tashkinov (aros@gmx.com) ---
(In reply to Luiz Von Dentz from comment #1)
> https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/
> commit/net/bluetooth/hci_event.c?id=314d8cd2787418c5ac6b02035c344644f47b292b
> 
> It haven't made to 5.17 though but it is already fixed in bluetooth-next.

I'm not sure what to make of this patch (don't quite understand the code -
error logging looks to be the same regardless albeit it's rate limited) - I
hope to see it applied to future stable releases.

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[Bug 215713] New (useless?) warning messages from BlueTooth in kernel 5.17

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=215713

--- Comment #3 from Luiz Von Dentz (luiz.dentz@gmail.com) ---
(In reply to Artem S. Tashkinov from comment #2)
> (In reply to Luiz Von Dentz from comment #1)
> >
> https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/
> >
> commit/net/bluetooth/hci_event.c?id=314d8cd2787418c5ac6b02035c344644f47b292b
> > 
> > It haven't made to 5.17 though but it is already fixed in bluetooth-next.
> 
> I'm not sure what to make of this patch (don't quite understand the code -
> error logging looks to be the same regardless albeit it's rate limited) - I
> hope to see it applied to future stable releases.

It does switch to HCI_EV_VENDOR (0xff) to be variable size so it won't be
triggering the error, the rate limite is just a safeguard in case some other
event start spamming.

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[Bug 215713] New (useless?) warning messages from BlueTooth in kernel 5.17

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=215713

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |CODE_FIX

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