Bug 215681

Summary:	Malicious advertising data showed in dmesg
Product:	Drivers	Reporter:	Olivier JUDITH (gnulux)
Component:	Bluetooth	Assignee:	linux-bluetooth (linux-bluetooth)
Status:	NEW ---
Severity:	normal
Priority:	P1
Hardware:	ARM
OS:	Linux
Kernel Version:	5.10.95	Subsystem:
Regression:	No	Bisected commit-id:

Description Olivier JUDITH 2022-03-14 15:35:35 UTC

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?

Comment 1 Artem S. Tashkinov 2022-03-15 15:41:09 UTC

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

Comment 2 Olivier JUDITH 2022-03-16 16:55:22 UTC


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 ?