After applying the patch above the UBSAN issue in devio.c disappeared.
However, I got the following messages in dmesg, probably due to a NetworkManager
malfunctioning, and if I click on the NetworkManager icon I get
"NetworkManager is not running"
but maybe this is another issue and your patch
I can reproduce the UBSAN report by inserting in the USB receptacle a
HUAWEI Mobile Broadband E353 HSPA+ USB Stick.
Alan Stern asked for /sys/kernel/debug/usb/devices:
cat debug-usb-devices
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 2
B: Alloc= 0/800 us ( 0%), #Int= 0,
