[Bug 215681] New: Malicious advertising data showed in dmesg

[Bug 215681] New: Malicious advertising data showed in dmesg

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=215681

            Bug ID: 215681
           Summary: Malicious advertising data showed in dmesg
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.10.95
          Hardware: ARM
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Bluetooth
          Assignee: linux-bluetooth@vger.kernel.org
          Reporter: gnulux@gmail.com
        Regression: No

Hi, 

I have recently moved from Raspbian 9 to 10 which means kernel 4.19 to kernem
5.10 . 
I use an application that advertises permanently and scans ble devices. 
Since the upgrade i noticed plenty of messages in  dmesg output like this : 

[Mon Mar 14 15:16:44 2022] Bluetooth: hci0: Malicious advertising data.
Stopping processing

This kind of messages were not displayed with 4.19 kernel

Any suggestions, how I can disable this flooding message?

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[Bug 215681] Malicious advertising data showed in dmesg

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=215681

--- Comment #1 from Artem S. Tashkinov (aros@gmx.com) ---
If you can compile the kernel, please do.

Find the code which prints it and patch it this way:

https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git/commit/?id=2d4b37b67cacbbad6fdb8621333f5ce48ae0e5fd

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[Bug 215681] Malicious advertising data showed in dmesg

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=215681

--- Comment #2 from Olivier JUDITH (gnulux@gmail.com) ---


Hi, 

Yes i compiled before and i can do it again. 
In the meanwhile i tried 5.15 and i've no Malicious messages displayed.

i'll we apply you suggestion

The issue come from hci_le_adv_report_evt in hci_event.h. i noticed that this
function is a bit different in 5.15. 

i also understood that the change was to evict flow of messages but the real
cause seems to be a packet size is exceeded. Does this mean that my advertising
is not correct ?

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