** Changed in: linux (Ubuntu Bionic)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1885271
Title:
kernel oops xr-usb-serial
Status in linux package in Ubuntu:
Confirmed
Status in linux source package in Bionic:
Fix Committed
Bug description:
# Steps to reproduce
# Working case
uname -a
Linux ubuntu 4.15.0-91-generic #92-Ubuntu SMP Fri Feb 28 11:09:48 UTC 2020
x86_64 x86_64 x86_64 GNU/Linux
lsusb -d 04e2:1411 -v > xr-usb-serial-devices.txt
lsusb -t >> xr-usb-serial-devices.txt
# Unbind 2 xr-usb-serial devices
echo '3-14.1' | tee /sys/bus/usb/drivers/usb/unbind
echo '3-14.3' | tee /sys/bus/usb/drivers/usb/unbind
dmesg > dmesg.txt
# Non working case
uname -a
Linux ubuntu 4.15.0-99-generic #100-Ubuntu SMP Wed Apr 22 20:32:56 UTC 2020
x86_64 x86_64 x86_64 GNU/Linux
lsusb -d 04e2:1411 -v > xr-usb-serial-devices.txt
<lsusb hangs here>
dmesg > dmesg.txt
This regression is almost certainly caused by one of the 2020-03-11 commits:
https://kernel.ubuntu.com/git/ubuntu/ubuntu-bionic.git/log/ubuntu/xr-usb-serial?h=Ubuntu-4.15.0-99.100&id=5966ed54d467fa77e7dbd7355177a5a6d1db7004
files attached in tar file.
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