Kernel panic (WiFi AP, USB 4G modem, Buster only, not Stretch)

Describe the bug Kernel Panic. See these screenshots: https://photos.app.goo.gl/BvdtMs27CNhryomFA https://photos.app.goo.gl/TmY1zZb7CYgSAZsr8 https://photos.app.goo.gl/gjsSxQPw4Ewwz2p68 https://photos.app.goo.gl/VkFwEKoVsm5SeF7N9 https://photos.app.goo.gl/8FS4oYKGGLQFDzZQ6 https://photos.app.goo.gl/sBZ6QSNbKdp4Srs68 https://photos.app.goo.gl/fv1EE4y2y89nWw6n9 https://photos.app.goo.gl/RbabvMLpC7kX7qb76

To reproduce This happens when trying to login to wifi AP using software installed from this repo: gitlab.com/pjbca/4GUAV.

I have reproduced it on THREE Raspberry Pi's with THREE SD cards. (All separate). All using Buster. I did NOT find it when using Stretch, also on FOUR Rasperry Pi's with FOUR SD cards (all separate.)

Expected behaviour Pi does not crash.

Actual behaviour Pi crashes. Monitor connected with HDMI gives "Kernel Panic" errors. Screenshots of errors.

System

Which model of Raspberry Pi? PiZeroW
Which OS and version (cat /etc/rpi-issue)? Raspberry Pi reference 2019-07-10 Generated using pi-gen, https://github.com/RPi-Distro/pi-gen, 175dfb027ffabd4b8d5080097af0e51ed9a4a56c, stage2
Which firmware version (vcgencmd version)? Jul 9 2019 14:42:57 Copyright (c) 2012 Broadcom version 6c3fe3f096a93de3b34252ad98cdccadeb534be2 (clean) (release) (start_x)
Which kernel version (uname -a)? Linux raspberrypi 4.19.58+ #1245 Fri Jul 12 17:20:08 BST 2019 armv6l GNU/Linux Logs See screenshots.

Additional context Using USB 4G Verizon modem on USB and Wifi AP with this software: gitlab.com/pjbca/4GUAV

Hi, I get the same thing as you. RPi model 2B+ with TPLink WiFi USB dongle with Buster. I have setup my WiFi AP in bridge mode as per this thread. https://raspberrypi.stackexchange.com/questions/88214/setting-up-a-raspberry-pi-as-an-access-point-the-easy-way

pi@raspberrypi:~ $ cat /etc/rpi-issue
Raspberry Pi reference 2019-07-10
Generated using pi-gen, https://github.com/RPi-Distro/pi-gen, 175dfb027ffabd4b8d5080097af0e51ed9a4a56c, stage2
pi@raspberrypi:~ $ vcgencmd version
Aug 15 2019 12:06:42 
Copyright (c) 2012 Broadcom
version 0e6daa5106dd4164474616408e0dc24f997ffcf3 (clean) (release) (start)
pi@raspberrypi:~ $ uname -a
Linux raspberrypi 4.19.66-v7+ #1253 SMP Thu Aug 15 11:49:46 BST 2019 armv7l GNU/Linux

raspberrypi / linux

Kernel panic (WiFi AP, USB 4G modem, Buster only, not Stretch) #3167