https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=256586
Bug ID: 256586
Summary: running firefox from a tmpfs backed unionfs causes
instant crash, no panic seen. system resets
Product: Base System
Version: 13.0-RELEASE
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: [email protected]
Reporter: [email protected]
Created attachment 225782
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=225782&action=edit
video displaying instant crash
For the purpose of testing new hardware without installing anything on it I
created a nanobsd image that unionfs mounts some tmpfs filesystems over the
readonly ones so some testing can be done:
/dev/gpt/rescuebins1a on / (ufs, local, read-only)
devfs on /dev (devfs)
tmpfs on /etc (tmpfs, local)
tmpfs on /var (tmpfs, local)
fdescfs on /dev/fd (fdescfs)
tmpfs on /boot/zfs (tmpfs, local)
tmpfs on /mnt/localfs/boot (tmpfs, local)
tmpfs on /mnt/localfs/home (tmpfs, local)
tmpfs on /mnt/localfs/usrlocal (tmpfs, local)
<above>:/mnt/localfs/boot on /boot (unionfs, local)
<above>:/mnt/localfs/home on /home (unionfs, local)
<above>:/mnt/localfs/usrlocal on /usr/local (unionfs, local)
This makes it somewhat easier to install packages on the fly without rebuilding
the nanobsd image.
I'm able to reset the system instantaneously when I install X, and run firefox
from there
sudo pkg install xfce xinit xf86-video-vmware open-vm-tools xf86-input-evdev
firefox
pkg info xfce xinit xf86-video-vmware open-vm-tools xf86-input-evdev firefox
xfce-4.16
xinit-1.4.1,1
xf86-video-vmware-13.3.0_6
open-vm-tools-11.2.5,2
xf86-input-evdev-2.10.6_6
firefox-89.0_2,2
startxfce
then from the desktop enviroment start the browser where xfce will select
firefox.
Just after firefox started the system resets.
I realise that this is an unusual setup. However, it should not cause an
unprivileged user to instantaneously reset the system without a panic and
indicates an issue.
There might be an easier way to reproduce it, by installing / uninstalling
software. But I couldn't reproduce this in a reliable manner.
the vm has 12GB memory
space before installing:
Filesystem Size Used Avail Capacity Mounted on
/dev/gpt/rescuebins1a 2.0G 1.8G 63M 97% /
devfs 1.0K 1.0K 0B 100% /dev
tmpfs 2.0G 3.2M 2.0G 0% /etc
tmpfs 2.0G 56M 1.9G 3% /var
fdescfs 1.0K 1.0K 0B 100% /dev/fd
tmpfs 100K 4.0K 96K 4% /boot/zfs
tmpfs 1.0G 4.0K 1.0G 0%
/mnt/localfs/boot
tmpfs 100M 4.0K 100M 0%
/mnt/localfs/home
tmpfs 4.0G 12K 4.0G 0%
/mnt/localfs/usrlocal
<above>:/mnt/localfs/boot 3.0G 2.0G 1.0G 67% /boot
<above>:/mnt/localfs/home 2.1G 2.0G 100M 95% /home
<above>:/mnt/localfs/usrlocal 6.0G 2.0G 4.0G 33% /usr/local
space after installing mentioned packages
Filesystem Size Used Avail Capacity Mounted on
/dev/gpt/rescuebins1a 2.0G 1.8G 63M 97% /
devfs 1.0K 1.0K 0B 100% /dev
tmpfs 2.0G 3.9M 2.0G 0% /etc
tmpfs 2.0G 457M 1.6G 22% /var
fdescfs 1.0K 1.0K 0B 100% /dev/fd
tmpfs 100K 4.0K 96K 4% /boot/zfs
tmpfs 1.0G 84K 1.0G 0%
/mnt/localfs/boot
tmpfs 100M 4.0K 100M 0%
/mnt/localfs/home
tmpfs 4.0G 2.4G 1.6G 60%
/mnt/localfs/usrlocal
<above>:/mnt/localfs/boot 3.0G 2.0G 1.0G 67% /boot
<above>:/mnt/localfs/home 2.1G 2.0G 100M 95% /home
<above>:/mnt/localfs/usrlocal 6.0G 4.4G 1.6G 73% /usr/local
fstab
/dev/gpt/rescuebins1a / ufs ro 1 1
/dev/gpt/rescuebins3 /cfg ufs rw,noauto 2 2
fdesc /dev/fd fdescfs rw 0 0
tmpfs /boot/zfs tmpfs rw,size=100k 0 0
tmpfs /mnt/localfs/boot tmpfs rw,size=1G 0 0
tmpfs /mnt/localfs/home tmpfs rw,size=100M 0 0
tmpfs /mnt/localfs/usrlocal tmpfs rw,size=4G 0 0
/mnt/localfs/boot /boot unionfs rw,noatime,late 0 0
/mnt/localfs/home /home unionfs rw,noatime,late 0 0
/mnt/localfs/usrlocal /usr/local unionfs rw,noatime,late 0 0
after xfce4 startup approximately 4G is still free
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