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From:   Vincent RUBY <vruby@cube-technologies.net>
To:     "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
Subject: Kernel crash when scanning for APs in huge WiFi environment -
 Ath10K - ARMV7 - Linux 4.14.73
Thread-Topic: Kernel crash when scanning for APs in huge WiFi environment -
 Ath10K - ARMV7 - Linux 4.14.73
Thread-Index: Add00g30B+V1wjYvQ12HCt8vs0rm9wAB60sA
Date:   Fri, 9 Jul 2021 15:48:21 +0000
Message-ID: <e23f3f12dcab42ea9ab4b7384080cdf2@Cube-mail.cube.local>
References: <1cef8054e4e447f2ba02d1de1e6afdf8@Cube-mail.cube.local>
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Hi,

I apologize in advance if I am writing at the wrong place.
We have developed a custom embedded board based on ARMV7. On the board there is a Telit WE866C3-P Wifi module (based on ath10k).
Linux : 4.14.73 (YOCTO/poky)
Microcontroller : SAMA5D27

The board is working perfectly in a normal Wifi environment (e.g., at office).
But when the board is put in a huge Wifi environment (e.g., 350 APs with 2 antennas each with more than 600 visible BSSIDS) the Linux kernel crashes when attempting to connect to a Wifi network using wpa_supplicant.
When the Wifi antenna is attenuated with some electromagnetic obstacle (e.g., hand or metallic shield), the board connects without any problem.

The problem is the same when running a scan from wpa_cli .

Do you have any idea where I can find some clue to resolve this issue?

Many thanks in advance !

VinceCube