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[GH-ISSUE #4629] /var not mounted with --overlay and failed to do dpkg related things #2731

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opened 2026-05-05 09:23:47 -06:00 by gitea-mirror · 5 comments
gitea-mirror commented 2026-05-05 09:23:47 -06:00
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Originally created by @SalimTerryLi on GitHub (Oct 21, 2021).
Original GitHub issue: https://github.com/netblue30/firejail/issues/4629

Description

After launching firejail with command firejail --overlay, /var directory is empty and seems not correctly mounted. This causes apt and dpkg not working.

Steps to Reproduce

  1. Execute firejail --name=test --overlay
  2. Join the jail with sudo firejail --join=test in another session
  3. try apt or dpkg

Expected behavior

There should be something in /var and apt & dpkg should work

Actual behavior

Nothing in /var so apt and dpkg won't work

Behavior without a profile

What changed calling LC_ALL=C firejail --noprofile /path/to/program in a terminal?

Without --overlay it works as expected.

Additional context

I didn't run sudo firecfg, as I don't want to apply all profiles to my system. Instead I want to isolate one manually and keep its data with overlayfs.

Found similar closed issue https://github.com/netblue30/firejail/issues/11

Environment

  • Linux Mint 20.2
  • Firejail version 0.9.62
  • 5.11 HWE kernel: 5.11.0-38-generic

Checklist

  • The issues is caused by firejail (i.e. running the program by path (e.g. /usr/bin/vlc) "fixes" it).
  • I can reproduce the issue without custom modifications (e.g. globals.local).
  • The program has a profile. (If not, request one in https://github.com/netblue30/firejail/issues/1139)
  • The profile (and redirect profile if exists) hasn't already been fixed upstream.
  • I have performed a short search for similar issues (to avoid opening a duplicate).
    • I'm aware of browser-allow-drm yes/browser-disable-u2f no in firejail.config to allow DRM/U2F in browsers.
  • I used --profile=PROFILENAME to set the right profile. (Only relevant for AppImages)

Log

Output of LC_ALL=C firejail --noprofile 

Parent pid 6360, child pid 6361
Child process initialized in 6.99 ms

Output of LC_ALL=C firejail --debug --overlay 

Autoselecting /bin/bash as shell
Command name #/bin/bash#
Attempting to find default.profile...
Found default.profile profile in /etc/firejail directory
Reading profile /etc/firejail/default.profile
Found disable-common.inc profile in /etc/firejail directory
Reading profile /etc/firejail/disable-common.inc
Found disable-passwdmgr.inc profile in /etc/firejail directory
Reading profile /etc/firejail/disable-passwdmgr.inc
Found disable-programs.inc profile in /etc/firejail directory
Reading profile /etc/firejail/disable-programs.inc
Warning: networking feature is disabled in Firejail configuration file

** Note: you can use --noprofile to disable default.profile **

Warning: --overlay and --noroot are mutually exclusive, noroot disabled
DISPLAY=:0.0 parsed as 0
Using the local network stack
Parent pid 6406, child pid 6407
Initializing child process
Host network configured
PID namespace installed
Mounting tmpfs on /run/firejail/mnt directory
Creating empty /run/firejail/mnt/seccomp directory
Creating empty /run/firejail/mnt/seccomp/seccomp.protocol file
Creating empty /run/firejail/mnt/seccomp/seccomp.postexec file
Build protocol filter: unix,inet,inet6
sbox run: /run/firejail/lib/fseccomp protocol build unix,inet,inet6 /run/firejail/mnt/seccomp/seccomp.protocol (null) 
Dropping all capabilities
Drop privileges: pid 2, uid 1000, gid 1000, nogroups 1
No supplementary groups

**     Warning: dropping all Linux capabilities     **

Linux kernel version 5.11
Mounting OverlayFS
DEBUG: chroot dirs are oroot /run/firejail/mnt/oroot  odiff /home/salimterryli/.firejail/6406/odiff  owork /home/salimterryli/.firejail/6406/owork
DEBUG: overlayhome var holds ##/run/firejail/mnt/oroot/home/salimterryli##
OverlayFS for /home configured in /home/salimterryli/.firejail/6406 directory
OverlayFS configured in /home/salimterryli/.firejail/6406 directory
Mounting /dev
Mounting /run
Mounting /tmp
Mounting /proc filesystem representing the PID namespace
Warning: /var/lock not mounted
Warning: /var/tmp not mounted
Warning: cannot hide /var/log directory
Warning: cannot find /var/run/utmp
Cleaning /home directory
Cleaning /run/user directory
Sanitizing /etc/passwd, UID_MIN 1000
Sanitizing /etc/group, GID_MIN 1000
Disable /run/firejail/network
Disable /run/firejail/bandwidth
Disable /run/firejail/name
Disable /run/firejail/profile
Disable /run/firejail/x11
Mounting read-only /proc/sys
Remounting /sys directory
Disable /sys/firmware
Disable /sys/hypervisor
Disable /sys/power
Disable /sys/kernel/debug
Disable /sys/kernel/vmcoreinfo
Disable /sys/kernel/uevent_helper
Disable /proc/sys/fs/binfmt_misc
Disable /proc/sys/kernel/core_pattern
Disable /proc/sys/kernel/modprobe
Disable /proc/sysrq-trigger
Disable /proc/sys/kernel/hotplug
Disable /proc/sys/vm/panic_on_oom
Disable /proc/irq
Disable /proc/bus
Disable /proc/sched_debug
Disable /proc/timer_list
Disable /proc/kcore
Disable /proc/kallsyms
Disable /usr/lib/modules (requested /lib/modules)
Disable /usr/lib/debug
Disable /boot
Disable /dev/port
Disable /run/user/1000/gnupg
Disable /run/user/1000/systemd
Disable /dev/kmsg
Disable /proc/kmsg
Disable /home/salimterryli/.bash_history
Disable /home/salimterryli/.python_history
Disable /home/salimterryli/.python_history
Disable /home/salimterryli/.lesshst
Disable /home/salimterryli/.config/autostart
Disable /etc/X11/Xsession.d
Disable /etc/xdg/autostart
Mounting read-only /home/salimterryli/.Xauthority
1075 862 0:70 /salimterryli/.Xauthority /home/salimterryli/.Xauthority ro,relatime - overlay overlay rw,lowerdir=/home,upperdir=/home/salimterryli/.firejail/6406/hdiff,workdir=/home/salimterryli/.firejail/6406/hwork
mountid=1075 fsname=/salimterryli/.Xauthority dir=/home/salimterryli/.Xauthority fstype=overlay
Mounting read-only /home/salimterryli/.config/dconf
1076 862 0:70 /salimterryli/.config/dconf /home/salimterryli/.config/dconf ro,relatime - overlay overlay rw,lowerdir=/home,upperdir=/home/salimterryli/.firejail/6406/hdiff,workdir=/home/salimterryli/.firejail/6406/hwork
mountid=1076 fsname=/salimterryli/.config/dconf dir=/home/salimterryli/.config/dconf fstype=overlay
Disable /home/salimterryli/.config/systemd
Disable /home/salimterryli/.config/VirtualBox
Disable /home/salimterryli/VirtualBox VMs
Disable /etc/anacrontab
Disable /etc/cron.hourly
Disable /etc/crontab
Disable /etc/cron.d
Disable /etc/cron.daily
Disable /etc/cron.weekly
Disable /etc/cron.monthly
Disable /etc/profile.d
Disable /etc/rcS.d
Disable /etc/rc4.d
Disable /etc/rc6.d
Disable /etc/rc1.d
Disable /etc/rc5.d
Disable /etc/rc2.d
Disable /etc/rc3.d
Disable /etc/rc0.d
Disable /etc/kerneloops.conf
Disable /etc/kernel-img.conf
Disable /etc/kernel
Disable /etc/grub.d
Disable /etc/dkms
Disable /etc/apparmor
Disable /etc/apparmor.d
Disable /etc/selinux
Disable /etc/modules-load.d
Disable /etc/modules
Disable /etc/logrotate.d
Disable /etc/logrotate.conf
Disable /etc/adduser.conf
Mounting read-only /home/salimterryli/.bash_logout
1109 862 0:70 /salimterryli/.bash_logout /home/salimterryli/.bash_logout ro,relatime - overlay overlay rw,lowerdir=/home,upperdir=/home/salimterryli/.firejail/6406/hdiff,workdir=/home/salimterryli/.firejail/6406/hwork
mountid=1109 fsname=/salimterryli/.bash_logout dir=/home/salimterryli/.bash_logout fstype=overlay
Mounting read-only /home/salimterryli/.bashrc
1110 862 0:70 /salimterryli/.bashrc /home/salimterryli/.bashrc ro,relatime - overlay overlay rw,lowerdir=/home,upperdir=/home/salimterryli/.firejail/6406/hdiff,workdir=/home/salimterryli/.firejail/6406/hwork
mountid=1110 fsname=/salimterryli/.bashrc dir=/home/salimterryli/.bashrc fstype=overlay
Mounting read-only /home/salimterryli/.profile
1111 862 0:70 /salimterryli/.profile /home/salimterryli/.profile ro,relatime - overlay overlay rw,lowerdir=/home,upperdir=/home/salimterryli/.firejail/6406/hdiff,workdir=/home/salimterryli/.firejail/6406/hwork
mountid=1111 fsname=/salimterryli/.profile dir=/home/salimterryli/.profile fstype=overlay
Mounting read-only /home/salimterryli/.ssh/authorized_keys
1112 862 0:70 /salimterryli/.ssh/authorized_keys /home/salimterryli/.ssh/authorized_keys ro,relatime - overlay overlay rw,lowerdir=/home,upperdir=/home/salimterryli/.firejail/6406/hdiff,workdir=/home/salimterryli/.firejail/6406/hwork
mountid=1112 fsname=/salimterryli/.ssh/authorized_keys dir=/home/salimterryli/.ssh/authorized_keys fstype=overlay
Mounting read-only /home/salimterryli/.local/bin
1113 862 0:70 /salimterryli/.local/bin /home/salimterryli/.local/bin ro,relatime - overlay overlay rw,lowerdir=/home,upperdir=/home/salimterryli/.firejail/6406/hdiff,workdir=/home/salimterryli/.firejail/6406/hwork
mountid=1113 fsname=/salimterryli/.local/bin dir=/home/salimterryli/.local/bin fstype=overlay
Mounting read-only /home/salimterryli/.config/menus
1114 862 0:70 /salimterryli/.config/menus /home/salimterryli/.config/menus ro,relatime - overlay overlay rw,lowerdir=/home,upperdir=/home/salimterryli/.firejail/6406/hdiff,workdir=/home/salimterryli/.firejail/6406/hwork
mountid=1114 fsname=/salimterryli/.config/menus dir=/home/salimterryli/.config/menus fstype=overlay
Mounting read-only /home/salimterryli/.gnome/apps
1115 862 0:70 /salimterryli/.gnome/apps /home/salimterryli/.gnome/apps ro,relatime - overlay overlay rw,lowerdir=/home,upperdir=/home/salimterryli/.firejail/6406/hdiff,workdir=/home/salimterryli/.firejail/6406/hwork
mountid=1115 fsname=/salimterryli/.gnome/apps dir=/home/salimterryli/.gnome/apps fstype=overlay
Mounting read-only /home/salimterryli/.local/share/applications
1116 862 0:70 /salimterryli/.local/share/applications /home/salimterryli/.local/share/applications ro,relatime - overlay overlay rw,lowerdir=/home,upperdir=/home/salimterryli/.firejail/6406/hdiff,workdir=/home/salimterryli/.firejail/6406/hwork
mountid=1116 fsname=/salimterryli/.local/share/applications dir=/home/salimterryli/.local/share/applications fstype=overlay
Disable /home/salimterryli/.gnupg
Disable /home/salimterryli/.local/share/keyrings
Disable /home/salimterryli/.pki
Disable /home/salimterryli/.ssh
Disable /etc/group-
Disable /etc/gshadow
Disable /etc/gshadow-
Disable /etc/passwd-
Disable /etc/shadow
Disable /etc/shadow-
Disable /etc/ssh
Disable /usr/sbin (requested /sbin)
Disable /usr/local/sbin
Disable /usr/sbin
Disable /usr/bin/at
Disable /usr/bin/at (requested /bin/at)
Disable /usr/bin/chage
Disable /usr/bin/chage (requested /bin/chage)
Disable /usr/bin/chfn
Disable /usr/bin/chfn (requested /bin/chfn)
Disable /usr/bin/chsh
Disable /usr/bin/chsh (requested /bin/chsh)
Disable /usr/bin/crontab
Disable /usr/bin/crontab (requested /bin/crontab)
Disable /usr/bin/expiry
Disable /usr/bin/expiry (requested /bin/expiry)
Disable /usr/bin/fusermount
Disable /usr/bin/fusermount (requested /bin/fusermount)
Disable /usr/bin/gpasswd
Disable /usr/bin/gpasswd (requested /bin/gpasswd)
Disable /usr/bin/mount
Disable /usr/bin/mount (requested /bin/mount)
Disable /usr/bin/nc.openbsd (requested /usr/bin/nc)
Disable /usr/bin/nc.openbsd (requested /bin/nc)
Disable /usr/bin/newgrp
Disable /usr/bin/newgrp (requested /bin/newgrp)
Disable /usr/bin/ntfs-3g
Disable /usr/bin/ntfs-3g (requested /bin/ntfs-3g)
Disable /usr/bin/pkexec
Disable /usr/bin/pkexec (requested /bin/pkexec)
Disable /usr/bin/newgrp (requested /usr/bin/sg)
Disable /usr/bin/newgrp (requested /bin/sg)
Disable /usr/bin/strace
Disable /usr/bin/strace (requested /bin/strace)
Disable /usr/bin/su
Disable /usr/bin/su (requested /bin/su)
Disable /usr/bin/sudo
Disable /usr/bin/sudo (requested /bin/sudo)
Disable /usr/bin/umount
Disable /usr/bin/umount (requested /bin/umount)
Disable /usr/bin/xev
Disable /usr/bin/xev (requested /bin/xev)
Disable /usr/bin/xinput
Disable /usr/bin/xinput (requested /bin/xinput)
Disable /usr/lib/virtualbox
Disable /usr/bin/xfce4-terminal
Disable /usr/bin/xfce4-terminal (requested /bin/xfce4-terminal)
Disable /usr/bin/xfce4-terminal.wrapper
Disable /usr/bin/xfce4-terminal.wrapper (requested /bin/xfce4-terminal.wrapper)
Disable /usr/share/flatpak
Disable /usr/bin/bwrap
Disable /usr/bin/bwrap (requested /bin/bwrap)
Disable /home/salimterryli/.config/keepassxc
Disable /home/salimterryli/.local/share/KeePass
Disable /home/salimterryli/Arduino
Disable /home/salimterryli/.android
Disable /home/salimterryli/.arduino15
Disable /home/salimterryli/.config/Thunar
Disable /home/salimterryli/.config/VirtualBox
Disable /home/salimterryli/.config/caja
Disable /home/salimterryli/.config/catfish
Disable /home/salimterryli/.config/celluloid
Disable /home/salimterryli/.config/enchant
Disable /home/salimterryli/.config/evolution
Disable /home/salimterryli/.config/hexchat
Disable /home/salimterryli/.config/libreoffice
Disable /home/salimterryli/.config/pavucontrol.ini
Disable /home/salimterryli/.config/pix
Disable /home/salimterryli/.config/wireshark
Disable /home/salimterryli/.config/xed
Disable /home/salimterryli/.config/xfce4/xfconf/xfce-perchannel-xml/thunar.xml
Disable /home/salimterryli/.config/xviewer
Disable /home/salimterryli/.gitconfig
Disable /home/salimterryli/.java
Disable /home/salimterryli/.local/share/JetBrains
Disable /home/salimterryli/.local/share/TelegramDesktop
Disable /home/salimterryli/.local/share/evolution
Disable /home/salimterryli/.local/share/pix
Disable /home/salimterryli/.local/share/rhythmbox
Disable /home/salimterryli/.mozilla
Disable /home/salimterryli/.nv
Disable /home/salimterryli/.subversion
Disable /home/salimterryli/.thunderbird
Disable /home/salimterryli/.wget-hsts
Disable /tmp/ssh-WIGurBBayqCM
Disable /home/salimterryli/.cache/evolution
Disable /home/salimterryli/.cache/mozilla
Disable /home/salimterryli/.cache/rhythmbox
Disable /home/salimterryli/.cache/thunderbird
Disable /home/salimterryli/.cache/xreader
Disable /sys/fs
Disable /sys/module
Mounting noexec /run/firejail/mnt/pulse
Mounting /run/firejail/mnt/pulse on /home/salimterryli/.config/pulse
1220 862 0:64 /pulse /home/salimterryli/.config/pulse rw,nosuid,nodev,noexec - tmpfs tmpfs rw,mode=755,inode64
mountid=1220 fsname=/pulse dir=/home/salimterryli/.config/pulse fstype=tmpfs
Current directory: /home/salimterryli
DISPLAY=:0.0 parsed as 0
Install protocol filter: unix,inet,inet6
configuring 14 seccomp entries in /run/firejail/mnt/seccomp/seccomp.protocol
sbox run: /usr/lib/x86_64-linux-gnu/firejail/fsec-print /run/firejail/mnt/seccomp/seccomp.protocol (null) 
Dropping all capabilities
Drop privileges: pid 3, uid 1000, gid 1000, nogroups 1
No supplementary groups
 line  OP JT JF    K
=================================
 0000: 20 00 00 00000004   ld  data.architecture
 0001: 15 01 00 c000003e   jeq ARCH_64 0003 (false 0002)
 0002: 06 00 00 7fff0000   ret ALLOW
 0003: 20 00 00 00000000   ld  data.syscall-number
 0004: 15 01 00 00000029   jeq socket 0006 (false 0005)
 0005: 06 00 00 7fff0000   ret ALLOW
 0006: 20 00 00 00000010   ld  data.args[0]
 0007: 15 00 01 00000001   jeq 1 0008 (false 0009)
 0008: 06 00 00 7fff0000   ret ALLOW
 0009: 15 00 01 00000002   jeq 2 000a (false 000b)
 000a: 06 00 00 7fff0000   ret ALLOW
 000b: 15 00 01 0000000a   jeq a 000c (false 000d)
 000c: 06 00 00 7fff0000   ret ALLOW
 000d: 06 00 00 0005005f   ret ERRNO(95)
configuring 54 seccomp entries in /run/firejail/mnt/seccomp/seccomp.32
sbox run: /usr/lib/x86_64-linux-gnu/firejail/fsec-print /run/firejail/mnt/seccomp/seccomp.32 (null) 
Dropping all capabilities
Drop privileges: pid 4, uid 1000, gid 1000, nogroups 1
No supplementary groups
 line  OP JT JF    K
=================================
 0000: 20 00 00 00000004   ld  data.architecture
 0001: 15 01 00 40000003   jeq ARCH_32 0003 (false 0002)
 0002: 06 00 00 7fff0000   ret ALLOW
 0003: 20 00 00 00000000   ld  data.syscall-number
 0004: 15 30 00 00000015   jeq 15 0035 (false 0005)
 0005: 15 2f 00 00000034   jeq 34 0035 (false 0006)
 0006: 15 2e 00 0000001a   jeq 1a 0035 (false 0007)
 0007: 15 2d 00 0000011b   jeq 11b 0035 (false 0008)
 0008: 15 2c 00 00000155   jeq 155 0035 (false 0009)
 0009: 15 2b 00 00000156   jeq 156 0035 (false 000a)
 000a: 15 2a 00 0000007f   jeq 7f 0035 (false 000b)
 000b: 15 29 00 00000080   jeq 80 0035 (false 000c)
 000c: 15 28 00 0000015e   jeq 15e 0035 (false 000d)
 000d: 15 27 00 00000081   jeq 81 0035 (false 000e)
 000e: 15 26 00 0000006e   jeq 6e 0035 (false 000f)
 000f: 15 25 00 00000065   jeq 65 0035 (false 0010)
 0010: 15 24 00 00000121   jeq 121 0035 (false 0011)
 0011: 15 23 00 00000057   jeq 57 0035 (false 0012)
 0012: 15 22 00 00000073   jeq 73 0035 (false 0013)
 0013: 15 21 00 00000067   jeq 67 0035 (false 0014)
 0014: 15 20 00 0000015b   jeq 15b 0035 (false 0015)
 0015: 15 1f 00 0000015c   jeq 15c 0035 (false 0016)
 0016: 15 1e 00 00000087   jeq 87 0035 (false 0017)
 0017: 15 1d 00 00000095   jeq 95 0035 (false 0018)
 0018: 15 1c 00 0000007c   jeq 7c 0035 (false 0019)
 0019: 15 1b 00 00000157   jeq 157 0035 (false 001a)
 001a: 15 1a 00 000000fd   jeq fd 0035 (false 001b)
 001b: 15 19 00 00000150   jeq 150 0035 (false 001c)
 001c: 15 18 00 00000152   jeq 152 0035 (false 001d)
 001d: 15 17 00 0000015d   jeq 15d 0035 (false 001e)
 001e: 15 16 00 0000011e   jeq 11e 0035 (false 001f)
 001f: 15 15 00 0000011f   jeq 11f 0035 (false 0020)
 0020: 15 14 00 00000120   jeq 120 0035 (false 0021)
 0021: 15 13 00 00000056   jeq 56 0035 (false 0022)
 0022: 15 12 00 00000033   jeq 33 0035 (false 0023)
 0023: 15 11 00 0000007b   jeq 7b 0035 (false 0024)
 0024: 15 10 00 000000d9   jeq d9 0035 (false 0025)
 0025: 15 0f 00 000000f5   jeq f5 0035 (false 0026)
 0026: 15 0e 00 000000f6   jeq f6 0035 (false 0027)
 0027: 15 0d 00 000000f7   jeq f7 0035 (false 0028)
 0028: 15 0c 00 000000f8   jeq f8 0035 (false 0029)
 0029: 15 0b 00 000000f9   jeq f9 0035 (false 002a)
 002a: 15 0a 00 00000101   jeq 101 0035 (false 002b)
 002b: 15 09 00 00000112   jeq 112 0035 (false 002c)
 002c: 15 08 00 00000114   jeq 114 0035 (false 002d)
 002d: 15 07 00 00000126   jeq 126 0035 (false 002e)
 002e: 15 06 00 0000013d   jeq 13d 0035 (false 002f)
 002f: 15 05 00 0000013c   jeq 13c 0035 (false 0030)
 0030: 15 04 00 0000003d   jeq 3d 0035 (false 0031)
 0031: 15 03 00 00000058   jeq 58 0035 (false 0032)
 0032: 15 02 00 000000a9   jeq a9 0035 (false 0033)
 0033: 15 01 00 00000082   jeq 82 0035 (false 0034)
 0034: 06 00 00 7fff0000   ret ALLOW
 0035: 06 00 00 00000000   ret KILL
Dual 32/64 bit seccomp filter configured
configuring 72 seccomp entries in /run/firejail/mnt/seccomp/seccomp
sbox run: /usr/lib/x86_64-linux-gnu/firejail/fsec-print /run/firejail/mnt/seccomp/seccomp (null) 
Dropping all capabilities
Drop privileges: pid 5, uid 1000, gid 1000, nogroups 1
No supplementary groups
 line  OP JT JF    K
=================================
 0000: 20 00 00 00000004   ld  data.architecture
 0001: 15 01 00 c000003e   jeq ARCH_64 0003 (false 0002)
 0002: 06 00 00 7fff0000   ret ALLOW
 0003: 20 00 00 00000000   ld  data.syscall-number
 0004: 35 01 00 40000000   jge X32_ABI 0006 (false 0005)
 0005: 35 01 00 00000000   jge read 0007 (false 0006)
 0006: 06 00 00 00050001   ret ERRNO(1)
 0007: 15 3f 00 0000009f   jeq adjtimex 0047 (false 0008)
 0008: 15 3e 00 00000131   jeq clock_adjtime 0047 (false 0009)
 0009: 15 3d 00 000000e3   jeq clock_settime 0047 (false 000a)
 000a: 15 3c 00 000000a4   jeq settimeofday 0047 (false 000b)
 000b: 15 3b 00 0000009a   jeq modify_ldt 0047 (false 000c)
 000c: 15 3a 00 000000d4   jeq lookup_dcookie 0047 (false 000d)
 000d: 15 39 00 0000012a   jeq perf_event_open 0047 (false 000e)
 000e: 15 38 00 00000137   jeq process_vm_writev 0047 (false 000f)
 000f: 15 37 00 000000b0   jeq delete_module 0047 (false 0010)
 0010: 15 36 00 00000139   jeq finit_module 0047 (false 0011)
 0011: 15 35 00 000000af   jeq init_module 0047 (false 0012)
 0012: 15 34 00 0000009c   jeq _sysctl 0047 (false 0013)
 0013: 15 33 00 000000b7   jeq afs_syscall 0047 (false 0014)
 0014: 15 32 00 000000ae   jeq create_module 0047 (false 0015)
 0015: 15 31 00 000000b1   jeq get_kernel_syms 0047 (false 0016)
 0016: 15 30 00 000000b5   jeq getpmsg 0047 (false 0017)
 0017: 15 2f 00 000000b6   jeq putpmsg 0047 (false 0018)
 0018: 15 2e 00 000000b2   jeq query_module 0047 (false 0019)
 0019: 15 2d 00 000000b9   jeq security 0047 (false 001a)
 001a: 15 2c 00 0000008b   jeq sysfs 0047 (false 001b)
 001b: 15 2b 00 000000b8   jeq tuxcall 0047 (false 001c)
 001c: 15 2a 00 00000086   jeq uselib 0047 (false 001d)
 001d: 15 29 00 00000088   jeq ustat 0047 (false 001e)
 001e: 15 28 00 000000ec   jeq vserver 0047 (false 001f)
 001f: 15 27 00 000000ad   jeq ioperm 0047 (false 0020)
 0020: 15 26 00 000000ac   jeq iopl 0047 (false 0021)
 0021: 15 25 00 000000f6   jeq kexec_load 0047 (false 0022)
 0022: 15 24 00 00000140   jeq kexec_file_load 0047 (false 0023)
 0023: 15 23 00 000000a9   jeq reboot 0047 (false 0024)
 0024: 15 22 00 000000a7   jeq swapon 0047 (false 0025)
 0025: 15 21 00 000000a8   jeq swapoff 0047 (false 0026)
 0026: 15 20 00 00000130   jeq open_by_handle_at 0047 (false 0027)
 0027: 15 1f 00 0000012f   jeq name_to_handle_at 0047 (false 0028)
 0028: 15 1e 00 000000fb   jeq ioprio_set 0047 (false 0029)
 0029: 15 1d 00 00000067   jeq syslog 0047 (false 002a)
 002a: 15 1c 00 0000012c   jeq fanotify_init 0047 (false 002b)
 002b: 15 1b 00 00000138   jeq kcmp 0047 (false 002c)
 002c: 15 1a 00 000000f8   jeq add_key 0047 (false 002d)
 002d: 15 19 00 000000f9   jeq request_key 0047 (false 002e)
 002e: 15 18 00 000000ed   jeq mbind 0047 (false 002f)
 002f: 15 17 00 00000100   jeq migrate_pages 0047 (false 0030)
 0030: 15 16 00 00000117   jeq move_pages 0047 (false 0031)
 0031: 15 15 00 000000fa   jeq keyctl 0047 (false 0032)
 0032: 15 14 00 000000ce   jeq io_setup 0047 (false 0033)
 0033: 15 13 00 000000cf   jeq io_destroy 0047 (false 0034)
 0034: 15 12 00 000000d0   jeq io_getevents 0047 (false 0035)
 0035: 15 11 00 000000d1   jeq io_submit 0047 (false 0036)
 0036: 15 10 00 000000d2   jeq io_cancel 0047 (false 0037)
 0037: 15 0f 00 000000d8   jeq remap_file_pages 0047 (false 0038)
 0038: 15 0e 00 00000143   jeq userfaultfd 0047 (false 0039)
 0039: 15 0d 00 000000a3   jeq acct 0047 (false 003a)
 003a: 15 0c 00 00000141   jeq bpf 0047 (false 003b)
 003b: 15 0b 00 000000a1   jeq chroot 0047 (false 003c)
 003c: 15 0a 00 000000a5   jeq mount 0047 (false 003d)
 003d: 15 09 00 000000b4   jeq nfsservctl 0047 (false 003e)
 003e: 15 08 00 0000009b   jeq pivot_root 0047 (false 003f)
 003f: 15 07 00 000000ab   jeq setdomainname 0047 (false 0040)
 0040: 15 06 00 000000aa   jeq sethostname 0047 (false 0041)
 0041: 15 05 00 000000a6   jeq umount2 0047 (false 0042)
 0042: 15 04 00 00000099   jeq vhangup 0047 (false 0043)
 0043: 15 03 00 00000065   jeq ptrace 0047 (false 0044)
 0044: 15 02 00 00000087   jeq personality 0047 (false 0045)
 0045: 15 01 00 00000136   jeq process_vm_readv 0047 (false 0046)
 0046: 06 00 00 7fff0000   ret ALLOW
 0047: 06 00 01 00000000   ret KILL
seccomp filter configured
Mounting read-only /run/firejail/mnt/seccomp
Dropping all capabilities
NO_NEW_PRIVS set
Drop privileges: pid 1, uid 1000, gid 1000, nogroups 1
No supplementary groups
starting application
LD_PRELOAD=(null)
Running /bin/bash command through /bin/bash
execvp argument 0: /bin/bash
execvp argument 1: -c
execvp argument 2: /bin/bash
Child process initialized in 86.87 ms
Installing /run/firejail/mnt/seccomp/seccomp seccomp filter
Installing /run/firejail/mnt/seccomp/seccomp.32 seccomp filter
Installing /run/firejail/mnt/seccomp/seccomp.protocol seccomp filter
monitoring pid 6

Originally created by @SalimTerryLi on GitHub (Oct 21, 2021). Original GitHub issue: https://github.com/netblue30/firejail/issues/4629 ### Description After launching firejail with command `firejail --overlay`, `/var` directory is empty and seems not correctly mounted. This causes apt and dpkg not working. ### Steps to Reproduce 1. Execute `firejail --name=test --overlay` 2. Join the jail with `sudo firejail --join=test` in another session 3. try apt or dpkg ### Expected behavior There should be something in `/var` and apt & dpkg should work ### Actual behavior Nothing in `/var` so apt and dpkg won't work ### Behavior without a profile _What changed calling `LC_ALL=C firejail --noprofile /path/to/program` in a terminal?_ Without `--overlay` it works as expected. ### Additional context I didn't run `sudo firecfg`, as I don't want to apply all profiles to my system. Instead I want to isolate one manually and keep its data with overlayfs. Found similar closed issue https://github.com/netblue30/firejail/issues/11 ### Environment - Linux Mint 20.2 - Firejail version 0.9.62 - 5.11 HWE kernel: 5.11.0-38-generic ### Checklist <!-- Note: Items are checked with an "x", like so: - [x] This is a checked item. --> - [x] The issues is caused by firejail (i.e. running the program by path (e.g. `/usr/bin/vlc`) "fixes" it). - [x] I can reproduce the issue without custom modifications (e.g. globals.local). - [ ] The program has a profile. (If not, request one in `https://github.com/netblue30/firejail/issues/1139`) - [ ] The profile (and redirect profile if exists) hasn't already been fixed [upstream](https://github.com/netblue30/firejail/tree/master/etc). - [x] I have performed a short search for similar issues (to avoid opening a duplicate). - [ ] I'm aware of `browser-allow-drm yes`/`browser-disable-u2f no` in `firejail.config` to allow DRM/U2F in browsers. - [ ] I used `--profile=PROFILENAME` to set the right profile. (Only relevant for AppImages) ### Log <details> <summary>Output of <code>LC_ALL=C firejail --noprofile</code></summary> <p> ``` Parent pid 6360, child pid 6361 Child process initialized in 6.99 ms ``` </p> </details> <details> <summary>Output of <code>LC_ALL=C firejail --debug --overlay</code></summary> <p> ``` Autoselecting /bin/bash as shell Command name #/bin/bash# Attempting to find default.profile... Found default.profile profile in /etc/firejail directory Reading profile /etc/firejail/default.profile Found disable-common.inc profile in /etc/firejail directory Reading profile /etc/firejail/disable-common.inc Found disable-passwdmgr.inc profile in /etc/firejail directory Reading profile /etc/firejail/disable-passwdmgr.inc Found disable-programs.inc profile in /etc/firejail directory Reading profile /etc/firejail/disable-programs.inc Warning: networking feature is disabled in Firejail configuration file ** Note: you can use --noprofile to disable default.profile ** Warning: --overlay and --noroot are mutually exclusive, noroot disabled DISPLAY=:0.0 parsed as 0 Using the local network stack Parent pid 6406, child pid 6407 Initializing child process Host network configured PID namespace installed Mounting tmpfs on /run/firejail/mnt directory Creating empty /run/firejail/mnt/seccomp directory Creating empty /run/firejail/mnt/seccomp/seccomp.protocol file Creating empty /run/firejail/mnt/seccomp/seccomp.postexec file Build protocol filter: unix,inet,inet6 sbox run: /run/firejail/lib/fseccomp protocol build unix,inet,inet6 /run/firejail/mnt/seccomp/seccomp.protocol (null) Dropping all capabilities Drop privileges: pid 2, uid 1000, gid 1000, nogroups 1 No supplementary groups ** Warning: dropping all Linux capabilities ** Linux kernel version 5.11 Mounting OverlayFS DEBUG: chroot dirs are oroot /run/firejail/mnt/oroot odiff /home/salimterryli/.firejail/6406/odiff owork /home/salimterryli/.firejail/6406/owork DEBUG: overlayhome var holds ##/run/firejail/mnt/oroot/home/salimterryli## OverlayFS for /home configured in /home/salimterryli/.firejail/6406 directory OverlayFS configured in /home/salimterryli/.firejail/6406 directory Mounting /dev Mounting /run Mounting /tmp Mounting /proc filesystem representing the PID namespace Warning: /var/lock not mounted Warning: /var/tmp not mounted Warning: cannot hide /var/log directory Warning: cannot find /var/run/utmp Cleaning /home directory Cleaning /run/user directory Sanitizing /etc/passwd, UID_MIN 1000 Sanitizing /etc/group, GID_MIN 1000 Disable /run/firejail/network Disable /run/firejail/bandwidth Disable /run/firejail/name Disable /run/firejail/profile Disable /run/firejail/x11 Mounting read-only /proc/sys Remounting /sys directory Disable /sys/firmware Disable /sys/hypervisor Disable /sys/power Disable /sys/kernel/debug Disable /sys/kernel/vmcoreinfo Disable /sys/kernel/uevent_helper Disable /proc/sys/fs/binfmt_misc Disable /proc/sys/kernel/core_pattern Disable /proc/sys/kernel/modprobe Disable /proc/sysrq-trigger Disable /proc/sys/kernel/hotplug Disable /proc/sys/vm/panic_on_oom Disable /proc/irq Disable /proc/bus Disable /proc/sched_debug Disable /proc/timer_list Disable /proc/kcore Disable /proc/kallsyms Disable /usr/lib/modules (requested /lib/modules) Disable /usr/lib/debug Disable /boot Disable /dev/port Disable /run/user/1000/gnupg Disable /run/user/1000/systemd Disable /dev/kmsg Disable /proc/kmsg Disable /home/salimterryli/.bash_history Disable /home/salimterryli/.python_history Disable /home/salimterryli/.python_history Disable /home/salimterryli/.lesshst Disable /home/salimterryli/.config/autostart Disable /etc/X11/Xsession.d Disable /etc/xdg/autostart Mounting read-only /home/salimterryli/.Xauthority 1075 862 0:70 /salimterryli/.Xauthority /home/salimterryli/.Xauthority ro,relatime - overlay overlay rw,lowerdir=/home,upperdir=/home/salimterryli/.firejail/6406/hdiff,workdir=/home/salimterryli/.firejail/6406/hwork mountid=1075 fsname=/salimterryli/.Xauthority dir=/home/salimterryli/.Xauthority fstype=overlay Mounting read-only /home/salimterryli/.config/dconf 1076 862 0:70 /salimterryli/.config/dconf /home/salimterryli/.config/dconf ro,relatime - overlay overlay rw,lowerdir=/home,upperdir=/home/salimterryli/.firejail/6406/hdiff,workdir=/home/salimterryli/.firejail/6406/hwork mountid=1076 fsname=/salimterryli/.config/dconf dir=/home/salimterryli/.config/dconf fstype=overlay Disable /home/salimterryli/.config/systemd Disable /home/salimterryli/.config/VirtualBox Disable /home/salimterryli/VirtualBox VMs Disable /etc/anacrontab Disable /etc/cron.hourly Disable /etc/crontab Disable /etc/cron.d Disable /etc/cron.daily Disable /etc/cron.weekly Disable /etc/cron.monthly Disable /etc/profile.d Disable /etc/rcS.d Disable /etc/rc4.d Disable /etc/rc6.d Disable /etc/rc1.d Disable /etc/rc5.d Disable /etc/rc2.d Disable /etc/rc3.d Disable /etc/rc0.d Disable /etc/kerneloops.conf Disable /etc/kernel-img.conf Disable /etc/kernel Disable /etc/grub.d Disable /etc/dkms Disable /etc/apparmor Disable /etc/apparmor.d Disable /etc/selinux Disable /etc/modules-load.d Disable /etc/modules Disable /etc/logrotate.d Disable /etc/logrotate.conf Disable /etc/adduser.conf Mounting read-only /home/salimterryli/.bash_logout 1109 862 0:70 /salimterryli/.bash_logout /home/salimterryli/.bash_logout ro,relatime - overlay overlay rw,lowerdir=/home,upperdir=/home/salimterryli/.firejail/6406/hdiff,workdir=/home/salimterryli/.firejail/6406/hwork mountid=1109 fsname=/salimterryli/.bash_logout dir=/home/salimterryli/.bash_logout fstype=overlay Mounting read-only /home/salimterryli/.bashrc 1110 862 0:70 /salimterryli/.bashrc /home/salimterryli/.bashrc ro,relatime - overlay overlay rw,lowerdir=/home,upperdir=/home/salimterryli/.firejail/6406/hdiff,workdir=/home/salimterryli/.firejail/6406/hwork mountid=1110 fsname=/salimterryli/.bashrc dir=/home/salimterryli/.bashrc fstype=overlay Mounting read-only /home/salimterryli/.profile 1111 862 0:70 /salimterryli/.profile /home/salimterryli/.profile ro,relatime - overlay overlay rw,lowerdir=/home,upperdir=/home/salimterryli/.firejail/6406/hdiff,workdir=/home/salimterryli/.firejail/6406/hwork mountid=1111 fsname=/salimterryli/.profile dir=/home/salimterryli/.profile fstype=overlay Mounting read-only /home/salimterryli/.ssh/authorized_keys 1112 862 0:70 /salimterryli/.ssh/authorized_keys /home/salimterryli/.ssh/authorized_keys ro,relatime - overlay overlay rw,lowerdir=/home,upperdir=/home/salimterryli/.firejail/6406/hdiff,workdir=/home/salimterryli/.firejail/6406/hwork mountid=1112 fsname=/salimterryli/.ssh/authorized_keys dir=/home/salimterryli/.ssh/authorized_keys fstype=overlay Mounting read-only /home/salimterryli/.local/bin 1113 862 0:70 /salimterryli/.local/bin /home/salimterryli/.local/bin ro,relatime - overlay overlay rw,lowerdir=/home,upperdir=/home/salimterryli/.firejail/6406/hdiff,workdir=/home/salimterryli/.firejail/6406/hwork mountid=1113 fsname=/salimterryli/.local/bin dir=/home/salimterryli/.local/bin fstype=overlay Mounting read-only /home/salimterryli/.config/menus 1114 862 0:70 /salimterryli/.config/menus /home/salimterryli/.config/menus ro,relatime - overlay overlay rw,lowerdir=/home,upperdir=/home/salimterryli/.firejail/6406/hdiff,workdir=/home/salimterryli/.firejail/6406/hwork mountid=1114 fsname=/salimterryli/.config/menus dir=/home/salimterryli/.config/menus fstype=overlay Mounting read-only /home/salimterryli/.gnome/apps 1115 862 0:70 /salimterryli/.gnome/apps /home/salimterryli/.gnome/apps ro,relatime - overlay overlay rw,lowerdir=/home,upperdir=/home/salimterryli/.firejail/6406/hdiff,workdir=/home/salimterryli/.firejail/6406/hwork mountid=1115 fsname=/salimterryli/.gnome/apps dir=/home/salimterryli/.gnome/apps fstype=overlay Mounting read-only /home/salimterryli/.local/share/applications 1116 862 0:70 /salimterryli/.local/share/applications /home/salimterryli/.local/share/applications ro,relatime - overlay overlay rw,lowerdir=/home,upperdir=/home/salimterryli/.firejail/6406/hdiff,workdir=/home/salimterryli/.firejail/6406/hwork mountid=1116 fsname=/salimterryli/.local/share/applications dir=/home/salimterryli/.local/share/applications fstype=overlay Disable /home/salimterryli/.gnupg Disable /home/salimterryli/.local/share/keyrings Disable /home/salimterryli/.pki Disable /home/salimterryli/.ssh Disable /etc/group- Disable /etc/gshadow Disable /etc/gshadow- Disable /etc/passwd- Disable /etc/shadow Disable /etc/shadow- Disable /etc/ssh Disable /usr/sbin (requested /sbin) Disable /usr/local/sbin Disable /usr/sbin Disable /usr/bin/at Disable /usr/bin/at (requested /bin/at) Disable /usr/bin/chage Disable /usr/bin/chage (requested /bin/chage) Disable /usr/bin/chfn Disable /usr/bin/chfn (requested /bin/chfn) Disable /usr/bin/chsh Disable /usr/bin/chsh (requested /bin/chsh) Disable /usr/bin/crontab Disable /usr/bin/crontab (requested /bin/crontab) Disable /usr/bin/expiry Disable /usr/bin/expiry (requested /bin/expiry) Disable /usr/bin/fusermount Disable /usr/bin/fusermount (requested /bin/fusermount) Disable /usr/bin/gpasswd Disable /usr/bin/gpasswd (requested /bin/gpasswd) Disable /usr/bin/mount Disable /usr/bin/mount (requested /bin/mount) Disable /usr/bin/nc.openbsd (requested /usr/bin/nc) Disable /usr/bin/nc.openbsd (requested /bin/nc) Disable /usr/bin/newgrp Disable /usr/bin/newgrp (requested /bin/newgrp) Disable /usr/bin/ntfs-3g Disable /usr/bin/ntfs-3g (requested /bin/ntfs-3g) Disable /usr/bin/pkexec Disable /usr/bin/pkexec (requested /bin/pkexec) Disable /usr/bin/newgrp (requested /usr/bin/sg) Disable /usr/bin/newgrp (requested /bin/sg) Disable /usr/bin/strace Disable /usr/bin/strace (requested /bin/strace) Disable /usr/bin/su Disable /usr/bin/su (requested /bin/su) Disable /usr/bin/sudo Disable /usr/bin/sudo (requested /bin/sudo) Disable /usr/bin/umount Disable /usr/bin/umount (requested /bin/umount) Disable /usr/bin/xev Disable /usr/bin/xev (requested /bin/xev) Disable /usr/bin/xinput Disable /usr/bin/xinput (requested /bin/xinput) Disable /usr/lib/virtualbox Disable /usr/bin/xfce4-terminal Disable /usr/bin/xfce4-terminal (requested /bin/xfce4-terminal) Disable /usr/bin/xfce4-terminal.wrapper Disable /usr/bin/xfce4-terminal.wrapper (requested /bin/xfce4-terminal.wrapper) Disable /usr/share/flatpak Disable /usr/bin/bwrap Disable /usr/bin/bwrap (requested /bin/bwrap) Disable /home/salimterryli/.config/keepassxc Disable /home/salimterryli/.local/share/KeePass Disable /home/salimterryli/Arduino Disable /home/salimterryli/.android Disable /home/salimterryli/.arduino15 Disable /home/salimterryli/.config/Thunar Disable /home/salimterryli/.config/VirtualBox Disable /home/salimterryli/.config/caja Disable /home/salimterryli/.config/catfish Disable /home/salimterryli/.config/celluloid Disable /home/salimterryli/.config/enchant Disable /home/salimterryli/.config/evolution Disable /home/salimterryli/.config/hexchat Disable /home/salimterryli/.config/libreoffice Disable /home/salimterryli/.config/pavucontrol.ini Disable /home/salimterryli/.config/pix Disable /home/salimterryli/.config/wireshark Disable /home/salimterryli/.config/xed Disable /home/salimterryli/.config/xfce4/xfconf/xfce-perchannel-xml/thunar.xml Disable /home/salimterryli/.config/xviewer Disable /home/salimterryli/.gitconfig Disable /home/salimterryli/.java Disable /home/salimterryli/.local/share/JetBrains Disable /home/salimterryli/.local/share/TelegramDesktop Disable /home/salimterryli/.local/share/evolution Disable /home/salimterryli/.local/share/pix Disable /home/salimterryli/.local/share/rhythmbox Disable /home/salimterryli/.mozilla Disable /home/salimterryli/.nv Disable /home/salimterryli/.subversion Disable /home/salimterryli/.thunderbird Disable /home/salimterryli/.wget-hsts Disable /tmp/ssh-WIGurBBayqCM Disable /home/salimterryli/.cache/evolution Disable /home/salimterryli/.cache/mozilla Disable /home/salimterryli/.cache/rhythmbox Disable /home/salimterryli/.cache/thunderbird Disable /home/salimterryli/.cache/xreader Disable /sys/fs Disable /sys/module Mounting noexec /run/firejail/mnt/pulse Mounting /run/firejail/mnt/pulse on /home/salimterryli/.config/pulse 1220 862 0:64 /pulse /home/salimterryli/.config/pulse rw,nosuid,nodev,noexec - tmpfs tmpfs rw,mode=755,inode64 mountid=1220 fsname=/pulse dir=/home/salimterryli/.config/pulse fstype=tmpfs Current directory: /home/salimterryli DISPLAY=:0.0 parsed as 0 Install protocol filter: unix,inet,inet6 configuring 14 seccomp entries in /run/firejail/mnt/seccomp/seccomp.protocol sbox run: /usr/lib/x86_64-linux-gnu/firejail/fsec-print /run/firejail/mnt/seccomp/seccomp.protocol (null) Dropping all capabilities Drop privileges: pid 3, uid 1000, gid 1000, nogroups 1 No supplementary groups line OP JT JF K ================================= 0000: 20 00 00 00000004 ld data.architecture 0001: 15 01 00 c000003e jeq ARCH_64 0003 (false 0002) 0002: 06 00 00 7fff0000 ret ALLOW 0003: 20 00 00 00000000 ld data.syscall-number 0004: 15 01 00 00000029 jeq socket 0006 (false 0005) 0005: 06 00 00 7fff0000 ret ALLOW 0006: 20 00 00 00000010 ld data.args[0] 0007: 15 00 01 00000001 jeq 1 0008 (false 0009) 0008: 06 00 00 7fff0000 ret ALLOW 0009: 15 00 01 00000002 jeq 2 000a (false 000b) 000a: 06 00 00 7fff0000 ret ALLOW 000b: 15 00 01 0000000a jeq a 000c (false 000d) 000c: 06 00 00 7fff0000 ret ALLOW 000d: 06 00 00 0005005f ret ERRNO(95) configuring 54 seccomp entries in /run/firejail/mnt/seccomp/seccomp.32 sbox run: /usr/lib/x86_64-linux-gnu/firejail/fsec-print /run/firejail/mnt/seccomp/seccomp.32 (null) Dropping all capabilities Drop privileges: pid 4, uid 1000, gid 1000, nogroups 1 No supplementary groups line OP JT JF K ================================= 0000: 20 00 00 00000004 ld data.architecture 0001: 15 01 00 40000003 jeq ARCH_32 0003 (false 0002) 0002: 06 00 00 7fff0000 ret ALLOW 0003: 20 00 00 00000000 ld data.syscall-number 0004: 15 30 00 00000015 jeq 15 0035 (false 0005) 0005: 15 2f 00 00000034 jeq 34 0035 (false 0006) 0006: 15 2e 00 0000001a jeq 1a 0035 (false 0007) 0007: 15 2d 00 0000011b jeq 11b 0035 (false 0008) 0008: 15 2c 00 00000155 jeq 155 0035 (false 0009) 0009: 15 2b 00 00000156 jeq 156 0035 (false 000a) 000a: 15 2a 00 0000007f jeq 7f 0035 (false 000b) 000b: 15 29 00 00000080 jeq 80 0035 (false 000c) 000c: 15 28 00 0000015e jeq 15e 0035 (false 000d) 000d: 15 27 00 00000081 jeq 81 0035 (false 000e) 000e: 15 26 00 0000006e jeq 6e 0035 (false 000f) 000f: 15 25 00 00000065 jeq 65 0035 (false 0010) 0010: 15 24 00 00000121 jeq 121 0035 (false 0011) 0011: 15 23 00 00000057 jeq 57 0035 (false 0012) 0012: 15 22 00 00000073 jeq 73 0035 (false 0013) 0013: 15 21 00 00000067 jeq 67 0035 (false 0014) 0014: 15 20 00 0000015b jeq 15b 0035 (false 0015) 0015: 15 1f 00 0000015c jeq 15c 0035 (false 0016) 0016: 15 1e 00 00000087 jeq 87 0035 (false 0017) 0017: 15 1d 00 00000095 jeq 95 0035 (false 0018) 0018: 15 1c 00 0000007c jeq 7c 0035 (false 0019) 0019: 15 1b 00 00000157 jeq 157 0035 (false 001a) 001a: 15 1a 00 000000fd jeq fd 0035 (false 001b) 001b: 15 19 00 00000150 jeq 150 0035 (false 001c) 001c: 15 18 00 00000152 jeq 152 0035 (false 001d) 001d: 15 17 00 0000015d jeq 15d 0035 (false 001e) 001e: 15 16 00 0000011e jeq 11e 0035 (false 001f) 001f: 15 15 00 0000011f jeq 11f 0035 (false 0020) 0020: 15 14 00 00000120 jeq 120 0035 (false 0021) 0021: 15 13 00 00000056 jeq 56 0035 (false 0022) 0022: 15 12 00 00000033 jeq 33 0035 (false 0023) 0023: 15 11 00 0000007b jeq 7b 0035 (false 0024) 0024: 15 10 00 000000d9 jeq d9 0035 (false 0025) 0025: 15 0f 00 000000f5 jeq f5 0035 (false 0026) 0026: 15 0e 00 000000f6 jeq f6 0035 (false 0027) 0027: 15 0d 00 000000f7 jeq f7 0035 (false 0028) 0028: 15 0c 00 000000f8 jeq f8 0035 (false 0029) 0029: 15 0b 00 000000f9 jeq f9 0035 (false 002a) 002a: 15 0a 00 00000101 jeq 101 0035 (false 002b) 002b: 15 09 00 00000112 jeq 112 0035 (false 002c) 002c: 15 08 00 00000114 jeq 114 0035 (false 002d) 002d: 15 07 00 00000126 jeq 126 0035 (false 002e) 002e: 15 06 00 0000013d jeq 13d 0035 (false 002f) 002f: 15 05 00 0000013c jeq 13c 0035 (false 0030) 0030: 15 04 00 0000003d jeq 3d 0035 (false 0031) 0031: 15 03 00 00000058 jeq 58 0035 (false 0032) 0032: 15 02 00 000000a9 jeq a9 0035 (false 0033) 0033: 15 01 00 00000082 jeq 82 0035 (false 0034) 0034: 06 00 00 7fff0000 ret ALLOW 0035: 06 00 00 00000000 ret KILL Dual 32/64 bit seccomp filter configured configuring 72 seccomp entries in /run/firejail/mnt/seccomp/seccomp sbox run: /usr/lib/x86_64-linux-gnu/firejail/fsec-print /run/firejail/mnt/seccomp/seccomp (null) Dropping all capabilities Drop privileges: pid 5, uid 1000, gid 1000, nogroups 1 No supplementary groups line OP JT JF K ================================= 0000: 20 00 00 00000004 ld data.architecture 0001: 15 01 00 c000003e jeq ARCH_64 0003 (false 0002) 0002: 06 00 00 7fff0000 ret ALLOW 0003: 20 00 00 00000000 ld data.syscall-number 0004: 35 01 00 40000000 jge X32_ABI 0006 (false 0005) 0005: 35 01 00 00000000 jge read 0007 (false 0006) 0006: 06 00 00 00050001 ret ERRNO(1) 0007: 15 3f 00 0000009f jeq adjtimex 0047 (false 0008) 0008: 15 3e 00 00000131 jeq clock_adjtime 0047 (false 0009) 0009: 15 3d 00 000000e3 jeq clock_settime 0047 (false 000a) 000a: 15 3c 00 000000a4 jeq settimeofday 0047 (false 000b) 000b: 15 3b 00 0000009a jeq modify_ldt 0047 (false 000c) 000c: 15 3a 00 000000d4 jeq lookup_dcookie 0047 (false 000d) 000d: 15 39 00 0000012a jeq perf_event_open 0047 (false 000e) 000e: 15 38 00 00000137 jeq process_vm_writev 0047 (false 000f) 000f: 15 37 00 000000b0 jeq delete_module 0047 (false 0010) 0010: 15 36 00 00000139 jeq finit_module 0047 (false 0011) 0011: 15 35 00 000000af jeq init_module 0047 (false 0012) 0012: 15 34 00 0000009c jeq _sysctl 0047 (false 0013) 0013: 15 33 00 000000b7 jeq afs_syscall 0047 (false 0014) 0014: 15 32 00 000000ae jeq create_module 0047 (false 0015) 0015: 15 31 00 000000b1 jeq get_kernel_syms 0047 (false 0016) 0016: 15 30 00 000000b5 jeq getpmsg 0047 (false 0017) 0017: 15 2f 00 000000b6 jeq putpmsg 0047 (false 0018) 0018: 15 2e 00 000000b2 jeq query_module 0047 (false 0019) 0019: 15 2d 00 000000b9 jeq security 0047 (false 001a) 001a: 15 2c 00 0000008b jeq sysfs 0047 (false 001b) 001b: 15 2b 00 000000b8 jeq tuxcall 0047 (false 001c) 001c: 15 2a 00 00000086 jeq uselib 0047 (false 001d) 001d: 15 29 00 00000088 jeq ustat 0047 (false 001e) 001e: 15 28 00 000000ec jeq vserver 0047 (false 001f) 001f: 15 27 00 000000ad jeq ioperm 0047 (false 0020) 0020: 15 26 00 000000ac jeq iopl 0047 (false 0021) 0021: 15 25 00 000000f6 jeq kexec_load 0047 (false 0022) 0022: 15 24 00 00000140 jeq kexec_file_load 0047 (false 0023) 0023: 15 23 00 000000a9 jeq reboot 0047 (false 0024) 0024: 15 22 00 000000a7 jeq swapon 0047 (false 0025) 0025: 15 21 00 000000a8 jeq swapoff 0047 (false 0026) 0026: 15 20 00 00000130 jeq open_by_handle_at 0047 (false 0027) 0027: 15 1f 00 0000012f jeq name_to_handle_at 0047 (false 0028) 0028: 15 1e 00 000000fb jeq ioprio_set 0047 (false 0029) 0029: 15 1d 00 00000067 jeq syslog 0047 (false 002a) 002a: 15 1c 00 0000012c jeq fanotify_init 0047 (false 002b) 002b: 15 1b 00 00000138 jeq kcmp 0047 (false 002c) 002c: 15 1a 00 000000f8 jeq add_key 0047 (false 002d) 002d: 15 19 00 000000f9 jeq request_key 0047 (false 002e) 002e: 15 18 00 000000ed jeq mbind 0047 (false 002f) 002f: 15 17 00 00000100 jeq migrate_pages 0047 (false 0030) 0030: 15 16 00 00000117 jeq move_pages 0047 (false 0031) 0031: 15 15 00 000000fa jeq keyctl 0047 (false 0032) 0032: 15 14 00 000000ce jeq io_setup 0047 (false 0033) 0033: 15 13 00 000000cf jeq io_destroy 0047 (false 0034) 0034: 15 12 00 000000d0 jeq io_getevents 0047 (false 0035) 0035: 15 11 00 000000d1 jeq io_submit 0047 (false 0036) 0036: 15 10 00 000000d2 jeq io_cancel 0047 (false 0037) 0037: 15 0f 00 000000d8 jeq remap_file_pages 0047 (false 0038) 0038: 15 0e 00 00000143 jeq userfaultfd 0047 (false 0039) 0039: 15 0d 00 000000a3 jeq acct 0047 (false 003a) 003a: 15 0c 00 00000141 jeq bpf 0047 (false 003b) 003b: 15 0b 00 000000a1 jeq chroot 0047 (false 003c) 003c: 15 0a 00 000000a5 jeq mount 0047 (false 003d) 003d: 15 09 00 000000b4 jeq nfsservctl 0047 (false 003e) 003e: 15 08 00 0000009b jeq pivot_root 0047 (false 003f) 003f: 15 07 00 000000ab jeq setdomainname 0047 (false 0040) 0040: 15 06 00 000000aa jeq sethostname 0047 (false 0041) 0041: 15 05 00 000000a6 jeq umount2 0047 (false 0042) 0042: 15 04 00 00000099 jeq vhangup 0047 (false 0043) 0043: 15 03 00 00000065 jeq ptrace 0047 (false 0044) 0044: 15 02 00 00000087 jeq personality 0047 (false 0045) 0045: 15 01 00 00000136 jeq process_vm_readv 0047 (false 0046) 0046: 06 00 00 7fff0000 ret ALLOW 0047: 06 00 01 00000000 ret KILL seccomp filter configured Mounting read-only /run/firejail/mnt/seccomp Dropping all capabilities NO_NEW_PRIVS set Drop privileges: pid 1, uid 1000, gid 1000, nogroups 1 No supplementary groups starting application LD_PRELOAD=(null) Running /bin/bash command through /bin/bash execvp argument 0: /bin/bash execvp argument 1: -c execvp argument 2: /bin/bash Child process initialized in 86.87 ms Installing /run/firejail/mnt/seccomp/seccomp seccomp filter Installing /run/firejail/mnt/seccomp/seccomp.32 seccomp filter Installing /run/firejail/mnt/seccomp/seccomp.protocol seccomp filter monitoring pid 6 ``` </p> </details>
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 label 2026-05-05 09:23:47 -06:00
gitea-mirror commented 2026-05-05 09:23:49 -06:00
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@rusty-snake commented on GitHub (Oct 21, 2021):

OT: You should consider to install security updates (and to use a different distro as Ubuntu/Mint don't have security updates).

Is /var on a separate partition?

<!-- gh-comment-id:948306146 --> @rusty-snake commented on GitHub (Oct 21, 2021): OT: You should consider to install security updates (and to use a different distro as Ubuntu/Mint don't have security updates). --- Is `/var` on a separate partition?
gitea-mirror commented 2026-05-05 09:23:50 -06:00
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@SalimTerryLi commented on GitHub (Oct 21, 2021):

OT: You should consider to install security updates (and to use a different distro as Ubuntu/Mint don't have security updates).

Is /var on a separate partition?

Yes, I have /home and /var mounted on separate partitions. /home works just fine.

Any other dpkg based distro recommend? I have almost all my devices managed with dpkg and find Mint to be the best choice for PC...

<!-- gh-comment-id:948319414 --> @SalimTerryLi commented on GitHub (Oct 21, 2021): > OT: You should consider to install security updates (and to use a different distro as Ubuntu/Mint don't have security updates). > > Is `/var` on a separate partition? Yes, I have `/home` and `/var` mounted on separate partitions. `/home` works just fine. Any other dpkg based distro recommend? I have almost all my devices managed with dpkg and find Mint to be the best choice for PC...
gitea-mirror commented 2026-05-05 09:23:51 -06:00
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@SalimTerryLi commented on GitHub (Nov 3, 2021):

Any further information available? @rusty-snake

<!-- gh-comment-id:958955843 --> @SalimTerryLi commented on GitHub (Nov 3, 2021): Any further information available? @rusty-snake
gitea-mirror commented 2026-05-05 09:23:52 -06:00
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@rusty-snake commented on GitHub (Nov 7, 2021):

  • Execute firejail --name=test --overlay

  • Join the jail with sudo firejail --join=test in another session

Is only the --joined /var empty or firejail --overlay ls /var too?

<!-- gh-comment-id:962632800 --> @rusty-snake commented on GitHub (Nov 7, 2021): > * Execute `firejail --name=test --overlay` > > * Join the jail with `sudo firejail --join=test` in another session Is only the `--join`ed `/var` empty or `firejail --overlay ls /var` too?
gitea-mirror commented 2026-05-05 09:23:53 -06:00
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@SalimTerryLi commented on GitHub (Nov 7, 2021):

  • Execute firejail --name=test --overlay
  • Join the jail with sudo firejail --join=test in another session

Is only the --joined /var empty or firejail --overlay ls /var too?

Both are empty.

Also tested with firejail --name=test --overlay and sudo firejail --name=test --overlay, and join with or without sudo. Empty, either.

<!-- gh-comment-id:962635751 --> @SalimTerryLi commented on GitHub (Nov 7, 2021): > > * Execute `firejail --name=test --overlay` > > * Join the jail with `sudo firejail --join=test` in another session > > Is only the `--join`ed `/var` empty or `firejail --overlay ls /var` too? Both are empty. Also tested with `firejail --name=test --overlay` and `sudo firejail --name=test --overlay`, and join with or without `sudo`. Empty, either.
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