[GH-ISSUE #3304] firefox: Error while opening directory: fs.c:442 fs_tmpfs: No such file or directory #2074

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opened 2026-05-05 08:44:33 -06:00 by gitea-mirror · 15 comments

gitea-mirror commented 2026-05-05 08:44:33 -06:00

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Originally created by @houseofsuns on GitHub (Mar 29, 2020).
Original GitHub issue: https://github.com/netblue30/firejail/issues/3304

I use firejail to contain my firefox browser, but this unfortunately stopped working. I'm running Gentoo ~amd64 with a self-compiled kernel. I have the suspicion, that the problem is due to some interaction with another system component, but I was travelling a lot when the issue started and sadly can no longer reproduce any of the relevant configuration.

I tried to diagnose this, but was not very successful. Here come the observations:

• firejail firefox -no-remote starts firefox which shows me a popup "Your Firefox profile cannot be loaded. It may be missing or inaccessible" and exits.
• firejail --private firefox -no-remote gives up with "Error while opening directory: fs.c:450 fs_tmpfs: No such file or directory"
• mkdir /tmp/myhome ; firejail --private=/tmp/myhome firefox -no-remote gives up with "Error opening home directory: fs_home.c:265 fs_private_homedir: No such file or directory"
• firejail emacs seems to work fine, but the --private variants show the same behaviour as above

Everything happens exactly the same with --noprofile.

Finally firejail --version:

firejail version 0.9.62

Compile time support:
	- AppArmor support is disabled
	- AppImage support is enabled
	- chroot support is enabled
	- file and directory whitelisting support is enabled
	- file transfer support is enabled
	- firetunnel support is disabled
	- networking support is enabled
	- overlayfs support is enabled
	- private-home support is enabled
	- seccomp-bpf support is enabled
	- user namespace support is enabled
	- X11 sandboxing support is disabled

Originally created by @houseofsuns on GitHub (Mar 29, 2020). Original GitHub issue: https://github.com/netblue30/firejail/issues/3304 I use firejail to contain my firefox browser, but this unfortunately stopped working. I'm running Gentoo ~amd64 with a self-compiled kernel. I have the suspicion, that the problem is due to some interaction with another system component, but I was travelling a lot when the issue started and sadly can no longer reproduce any of the relevant configuration. I tried to diagnose this, but was not very successful. Here come the observations: * ``firejail firefox -no-remote`` starts firefox which shows me a popup "Your Firefox profile cannot be loaded. It may be missing or inaccessible" and exits. * ``firejail --private firefox -no-remote`` gives up with "Error while opening directory: fs.c:450 fs_tmpfs: No such file or directory" * ``mkdir /tmp/myhome ; firejail --private=/tmp/myhome firefox -no-remote`` gives up with "Error opening home directory: fs_home.c:265 fs_private_homedir: No such file or directory" * ``firejail emacs`` seems to work fine, but the ``--private`` variants show the same behaviour as above Everything happens exactly the same with ``--noprofile``. Finally ``firejail --version``: <pre> firejail version 0.9.62 Compile time support: - AppArmor support is disabled - AppImage support is enabled - chroot support is enabled - file and directory whitelisting support is enabled - file transfer support is enabled - firetunnel support is disabled - networking support is enabled - overlayfs support is enabled - private-home support is enabled - seccomp-bpf support is enabled - user namespace support is enabled - X11 sandboxing support is disabled </pre>

gitea-mirror commented 2026-05-05 08:44:35 -06:00

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@smitsohu commented on GitHub (Mar 29, 2020):

If a user home directory doesn't exist, Firejail fails with these admittedly somewhat cryptic errors. What I don't understand right now is

mkdir /tmp/myhome ; firejail --private=/tmp/myhome firefox -no-remote gives up with "Error opening home directory: fs_home.c:265 fs_private_homedir: No such file or directory"

Is there something special about the home directory (symbolic links, file system)?

<!-- gh-comment-id:605665412 --> @smitsohu commented on GitHub (Mar 29, 2020): If a user home directory doesn't exist, Firejail fails with these admittedly somewhat cryptic errors. What I don't understand right now is > `mkdir /tmp/myhome ; firejail --private=/tmp/myhome firefox -no-remote` gives up with "Error opening home directory: fs_home.c:265 fs_private_homedir: No such file or directory" Is there something special about the home directory (symbolic links, file system)?

gitea-mirror commented 2026-05-05 08:44:36 -06:00

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@houseofsuns commented on GitHub (Mar 29, 2020):

If a user home directory doesn't exist, Firejail fails with these admittedly somewhat cryptic errors. What I don't understand right now is

mkdir /tmp/myhome ; firejail --private=/tmp/myhome firefox -no-remote gives up with "Error opening home directory: fs_home.c:265 fs_private_homedir: No such file or directory"

Is there something special about the home directory (symbolic links, file system)?

On /tmp a tmpfs is mounted and myhome is a simple directory so that should be a no.

However my real home directory /home/houseofsuns actually is behind a symlink /home -> /compat/home due to historic reasons. I hope this does not impact usage.

<!-- gh-comment-id:605669327 --> @houseofsuns commented on GitHub (Mar 29, 2020): > If a user home directory doesn't exist, Firejail fails with these admittedly somewhat cryptic errors. What I don't understand right now is > > > `mkdir /tmp/myhome ; firejail --private=/tmp/myhome firefox -no-remote` gives up with "Error opening home directory: fs_home.c:265 fs_private_homedir: No such file or directory" > > Is there something special about the home directory (symbolic links, file system)? On /tmp a tmpfs is mounted and `myhome` is a simple directory so that should be a no. However my real home directory /home/houseofsuns actually is behind a symlink /home -> /compat/home due to historic reasons. I hope this does not impact usage.

gitea-mirror commented 2026-05-05 08:44:37 -06:00

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@smitsohu commented on GitHub (Mar 29, 2020):

I hope this does not impact usage.

It should be possible to rule it out: The home directory path in /etc/passwd, is it the link or is it the resolved path? If it is the link you could replace it with the resolved path and try again.

But actually I don't think that's the primary cause here.

For some reason Firejail cannot see your home directory. We had similar issues with filesystems that impose restrictions on the root user (like FUSE), but then I would expect a Permission denied error rather than No such file or directory, so probably it is something else.

<!-- gh-comment-id:605693429 --> @smitsohu commented on GitHub (Mar 29, 2020): > I hope this does not impact usage. It should be possible to rule it out: The home directory path in `/etc/passwd`, is it the link or is it the resolved path? If it is the link you could replace it with the resolved path and try again. But actually I don't think that's the primary cause here. For some reason Firejail cannot see your home directory. We had similar issues with filesystems that impose restrictions on the root user (like FUSE), but then I would expect a `Permission denied` error rather than `No such file or directory`, so probably it is something else.

gitea-mirror commented 2026-05-05 08:44:38 -06:00

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@houseofsuns commented on GitHub (Mar 29, 2020):

I hope this does not impact usage.

It should be possible to rule it out: The home directory path in /etc/passwd, is it the link or is it the resolved path? If it is the link you could replace it with the resolved path and try again.

I just checked and /etc/passwd contains /compat/home/houseofsuns so this should be ruled out. (I dimly remember doing a quick search for this exact issue and finding something about symlinks and hence replacing this.)

For some reason Firejail cannot see your home directory. We had similar issues with filesystems that impose restrictions on the root user (like FUSE), but then I would expect a Permission denied error rather than No such file or directory, so probably it is something else.

I'm at a loss here. As it seems like it could be relevant I'll add the output of mount.

/dev/sda4 on / type btrfs (rw,relatime,compress=lzo,ssd,discard,space_cache,subvolid=257,subvol=/system)
devtmpfs on /dev type devtmpfs (rw,relatime,size=16373220k,nr_inodes=4093305,mode=755)
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
tmpfs on /run type tmpfs (rw,nosuid,nodev,mode=755)
cgroup2 on /sys/fs/cgroup type cgroup2 (rw,nosuid,nodev,noexec,relatime,nsdelegate)
pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime)
efivarfs on /sys/firmware/efi/efivars type efivarfs (rw,nosuid,nodev,noexec,relatime)
none on /sys/fs/bpf type bpf (rw,nosuid,nodev,noexec,relatime,mode=700)
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime,pagesize=2M)
mqueue on /dev/mqueue type mqueue (rw,nosuid,nodev,noexec,relatime)
nfsd on /proc/fs/nfsd type nfsd (rw,relatime)
fusectl on /sys/fs/fuse/connections type fusectl (rw,nosuid,nodev,noexec,relatime)
configfs on /sys/kernel/config type configfs (rw,nosuid,nodev,noexec,relatime)
tmpfs on /tmp type tmpfs (rw,nosuid,nodev)
tmpfs on /var/tmp/portage type tmpfs (rw,relatime,size=31457280k)
/dev/sdb1 on /compat type ext4 (rw,relatime)
/dev/sdc1 on /archive type ext4 (rw,relatime)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime)
tmpfs on /run/user/112 type tmpfs (rw,nosuid,nodev,relatime,size=3281720k,mode=700,uid=112,gid=237)
tmpfs on /run/user/1001 type tmpfs (rw,nosuid,nodev,relatime,size=3281720k,mode=700,uid=1001,gid=1001)
tmpfs on /sys/fs/cgroup/portage type cgroup (rw,nosuid,nodev,noexec,relatime,release_agent=/usr/lib/portage/python3.8/cgroup-release-agent,name=portage)

<!-- gh-comment-id:605696046 --> @houseofsuns commented on GitHub (Mar 29, 2020): > > I hope this does not impact usage. > > It should be possible to rule it out: The home directory path in `/etc/passwd`, is it the link or is it the resolved path? If it is the link you could replace it with the resolved path and try again. I just checked and `/etc/passwd` contains `/compat/home/houseofsuns` so this should be ruled out. (I dimly remember doing a quick search for this exact issue and finding something about symlinks and hence replacing this.) > For some reason Firejail cannot see your home directory. We had similar issues with filesystems that impose restrictions on the root user (like FUSE), but then I would expect a `Permission denied` error rather than `No such file or directory`, so probably it is something else. I'm at a loss here. As it seems like it could be relevant I'll add the output of `mount`. <pre> /dev/sda4 on / type btrfs (rw,relatime,compress=lzo,ssd,discard,space_cache,subvolid=257,subvol=/system) devtmpfs on /dev type devtmpfs (rw,relatime,size=16373220k,nr_inodes=4093305,mode=755) sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime) proc on /proc type proc (rw,nosuid,nodev,noexec,relatime) securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime) tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev) devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000) tmpfs on /run type tmpfs (rw,nosuid,nodev,mode=755) cgroup2 on /sys/fs/cgroup type cgroup2 (rw,nosuid,nodev,noexec,relatime,nsdelegate) pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime) efivarfs on /sys/firmware/efi/efivars type efivarfs (rw,nosuid,nodev,noexec,relatime) none on /sys/fs/bpf type bpf (rw,nosuid,nodev,noexec,relatime,mode=700) hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime,pagesize=2M) mqueue on /dev/mqueue type mqueue (rw,nosuid,nodev,noexec,relatime) nfsd on /proc/fs/nfsd type nfsd (rw,relatime) fusectl on /sys/fs/fuse/connections type fusectl (rw,nosuid,nodev,noexec,relatime) configfs on /sys/kernel/config type configfs (rw,nosuid,nodev,noexec,relatime) tmpfs on /tmp type tmpfs (rw,nosuid,nodev) tmpfs on /var/tmp/portage type tmpfs (rw,relatime,size=31457280k) /dev/sdb1 on /compat type ext4 (rw,relatime) /dev/sdc1 on /archive type ext4 (rw,relatime) sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime) tmpfs on /run/user/112 type tmpfs (rw,nosuid,nodev,relatime,size=3281720k,mode=700,uid=112,gid=237) tmpfs on /run/user/1001 type tmpfs (rw,nosuid,nodev,relatime,size=3281720k,mode=700,uid=1001,gid=1001) tmpfs on /sys/fs/cgroup/portage type cgroup (rw,nosuid,nodev,noexec,relatime,release_agent=/usr/lib/portage/python3.8/cgroup-release-agent,name=portage) </pre>

gitea-mirror commented 2026-05-05 08:44:39 -06:00

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@smitsohu commented on GitHub (Mar 30, 2020):

That mount table looks fairly standard. For the moment I'm out of ideas. Somebody else?

Maybe if you could post the output of

mkdir /tmp/myhome
firejail --private=/tmp/myhome --noprofile --debug | grep Mount-bind

just to rule out that Firejail tries to do something stupid?

<!-- gh-comment-id:605977247 --> @smitsohu commented on GitHub (Mar 30, 2020): That mount table looks fairly standard. For the moment I'm out of ideas. Somebody else? Maybe if you could post the output of ``` mkdir /tmp/myhome firejail --private=/tmp/myhome --noprofile --debug | grep Mount-bind ``` just to rule out that Firejail tries to do something stupid?

gitea-mirror commented 2026-05-05 08:44:40 -06:00

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@houseofsuns commented on GitHub (Mar 30, 2020):

Here you go:

$ mkdir /tmp/myhome ; firejail --private=/tmp/myhome --noprofile --debug | grep Mount-bind
DISPLAY=:1 parsed as 1
Parent pid 4388, child pid 4392
Error opening home directory: fs_home.c:265 fs_private_homedir: No such file or directory
Mount-bind /tmp/myhome on top of /compat/home/houseofsuns
Error: proc 4388 cannot sync with peer: unexpected EOF
Peer 4392 unexpectedly exited with status 1

<!-- gh-comment-id:606101803 --> @houseofsuns commented on GitHub (Mar 30, 2020): Here you go: <pre> $ mkdir /tmp/myhome ; firejail --private=/tmp/myhome --noprofile --debug | grep Mount-bind DISPLAY=:1 parsed as 1 Parent pid 4388, child pid 4392 Error opening home directory: fs_home.c:265 fs_private_homedir: No such file or directory Mount-bind /tmp/myhome on top of /compat/home/houseofsuns Error: proc 4388 cannot sync with peer: unexpected EOF Peer 4392 unexpectedly exited with status 1 </pre>

gitea-mirror commented 2026-05-05 08:44:40 -06:00

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@ghost commented on GitHub (Apr 5, 2020):

@houseofsuns Any progress? If not, and you have the time to git bisect, that would definately help to get to the bottom of this issue. We definately would like to see firejail working as expected on Gentoo.

<!-- gh-comment-id:609368192 --> @ghost commented on GitHub (Apr 5, 2020): @houseofsuns Any progress? If not, and you have the time to git bisect, that would definately help to get to the bottom of this issue. We definately would like to see firejail working as expected on Gentoo.

gitea-mirror commented 2026-05-05 08:44:41 -06:00

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@houseofsuns commented on GitHub (Apr 5, 2020):

I did a git bisect and for the case firejail --private firefox -no-remote it returned 74e5911806 as the first bad commit.

<!-- gh-comment-id:609416240 --> @houseofsuns commented on GitHub (Apr 5, 2020): I did a git bisect and for the case ``firejail --private firefox -no-remote`` it returned 74e5911806d6f456819c65db37b0e29bc1f402d7 as the first bad commit.

gitea-mirror commented 2026-05-05 08:44:42 -06:00

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@houseofsuns commented on GitHub (Apr 5, 2020):

However for mkdir /tmp/myhome ; firejail --private=/tmp/myhome firefox -no-remote I went back to version 0.9.56 (which was one and a half years ago) and it shows the same error. Which means that it is some interaction problem as my setup definitely worked at that time (it stopped working at most six month ago).

<!-- gh-comment-id:609417193 --> @houseofsuns commented on GitHub (Apr 5, 2020): However for ``mkdir /tmp/myhome ; firejail --private=/tmp/myhome firefox -no-remote`` I went back to version 0.9.56 (which was one and a half years ago) and it shows the same error. Which means that it is some interaction problem as my setup definitely worked at that time (it stopped working at most six month ago).

gitea-mirror commented 2026-05-05 08:44:42 -06:00

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@ghost commented on GitHub (Apr 5, 2020):

@houseofsuns Thanks for taking the time to git bisect. Hopefully @smitsohu can have another look at this.

<!-- gh-comment-id:609417397 --> @ghost commented on GitHub (Apr 5, 2020): @houseofsuns Thanks for taking the time to git bisect. Hopefully @smitsohu can have another look at this.

gitea-mirror commented 2026-05-05 08:44:43 -06:00

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@smitsohu commented on GitHub (Apr 5, 2020):

@glitsj16 Failing hard was maybe always a bit excessive, at least in a number of places. What I can do right now, without understanding the underlying issue, is to fail softly with a warning where it is easy to do.

But of course this is not really going to solve the problems of @houseofsuns

<!-- gh-comment-id:609424599 --> @smitsohu commented on GitHub (Apr 5, 2020): @glitsj16 Failing hard was maybe always a bit excessive, at least in a number of places. What I can do right now, without understanding the underlying issue, is to fail softly with a warning where it is easy to do. But of course this is not really going to solve the problems of @houseofsuns

gitea-mirror commented 2026-05-05 08:44:43 -06:00

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@smitsohu commented on GitHub (Apr 5, 2020):

@houseofsuns
Does Firejail print the following warning message, maybe despite you updating /etc/passwd with a resolved path?

No full support for symbolic links in path of user directory.
Please provide resolved path in password database (/etc/passwd).

Or do you see something in the syslog?

<!-- gh-comment-id:609424738 --> @smitsohu commented on GitHub (Apr 5, 2020): @houseofsuns Does Firejail print the following warning message, maybe despite you updating `/etc/passwd` with a resolved path? ``` No full support for symbolic links in path of user directory. Please provide resolved path in password database (/etc/passwd). ``` Or do you see something in the syslog?

gitea-mirror commented 2026-05-05 08:44:44 -06:00

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@ghost commented on GitHub (Apr 5, 2020):

What I can do right now, without understanding the underlying issue, is to fail softly with a warning where it is easy to do.

@smitsohu I have full confidence you know what's the best way to deal with this :) I was doing a bit of issue triaging when I noticed this, so I took the liberty to ping you.

<!-- gh-comment-id:609426146 --> @ghost commented on GitHub (Apr 5, 2020): > What I can do right now, without understanding the underlying issue, is to fail softly with a warning where it is easy to do. @smitsohu I have full confidence you know what's the best way to deal with this :) I was doing a bit of issue triaging when I noticed this, so I took the liberty to ping you.

gitea-mirror commented 2026-05-05 08:44:44 -06:00

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@houseofsuns commented on GitHub (Apr 5, 2020):

@smitsohu I just had another go at it, but no different result.

Here my passwd-settings:

$ grep houseofsuns /etc/passwd
houseofsuns:x:1001:1001::/compat/home/houseofsuns:/bin/zsh

And here a full debug output:

$ firejail --debug --noprofile --private firefox -no-remote
Autoselecting /bin/zsh as shell
Building quoted command line: 'firefox' '-no-remote' 
Command name #firefox#
DISPLAY=:1 parsed as 1
Using the local network stack
Parent pid 2594539, child pid 2594540
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
Creating empty /run/firejail/mnt/seccomp/seccomp.postexec32 file
Mounting /proc filesystem representing the PID namespace
Basic read-only filesystem:
Mounting read-only /etc
537 508 0:19 /system/etc /etc ro,relatime master:1 - btrfs /dev/sda4 rw,compress=lzo,ssd,discard,space_cache,subvolid=257,subvol=/system/etc
mountid=537 fsname=/system/etc dir=/etc fstype=btrfs
Mounting noexec /etc
538 537 0:19 /system/etc /etc ro,nosuid,nodev,noexec,relatime master:1 - btrfs /dev/sda4 rw,compress=lzo,ssd,discard,space_cache,subvolid=257,subvol=/system/etc
mountid=538 fsname=/system/etc dir=/etc fstype=btrfs
Mounting read-only /var
599 597 0:39 / /var/lib/nfs/rpc_pipefs rw,relatime master:70 - rpc_pipefs sunrpc rw
mountid=599 fsname=/ dir=/var/lib/nfs/rpc_pipefs fstype=rpc_pipefs
Mounting read-only /var/tmp/portage
600 598 0:34 / /var/tmp/portage ro,relatime master:58 - tmpfs tmpfs rw,size=31457280k
mountid=600 fsname=/ dir=/var/tmp/portage fstype=tmpfs
Mounting read-only /var/lib/nfs/rpc_pipefs
601 599 0:39 / /var/lib/nfs/rpc_pipefs ro,relatime master:70 - rpc_pipefs sunrpc rw
mountid=601 fsname=/ dir=/var/lib/nfs/rpc_pipefs fstype=rpc_pipefs
Mounting noexec /var
606 605 0:39 / /var/lib/nfs/rpc_pipefs ro,relatime master:70 - rpc_pipefs sunrpc rw
mountid=606 fsname=/ dir=/var/lib/nfs/rpc_pipefs fstype=rpc_pipefs
Mounting noexec /var/tmp/portage
607 604 0:34 / /var/tmp/portage ro,nosuid,nodev,noexec,relatime master:58 - tmpfs tmpfs rw,size=31457280k
mountid=607 fsname=/ dir=/var/tmp/portage fstype=tmpfs
Mounting noexec /var/lib/nfs/rpc_pipefs
608 606 0:39 / /var/lib/nfs/rpc_pipefs ro,nosuid,nodev,noexec,relatime master:70 - rpc_pipefs sunrpc rw
mountid=608 fsname=/ dir=/var/lib/nfs/rpc_pipefs fstype=rpc_pipefs
Mounting read-only /usr
609 508 0:19 /system/usr /usr ro,relatime master:1 - btrfs /dev/sda4 rw,compress=lzo,ssd,discard,space_cache,subvolid=257,subvol=/system/usr
mountid=609 fsname=/system/usr dir=/usr fstype=btrfs
Mounting read-only /bin
610 508 0:19 /system/bin /bin ro,relatime master:1 - btrfs /dev/sda4 rw,compress=lzo,ssd,discard,space_cache,subvolid=257,subvol=/system/bin
mountid=610 fsname=/system/bin dir=/bin fstype=btrfs
Mounting read-only /sbin
611 508 0:19 /system/sbin /sbin ro,relatime master:1 - btrfs /dev/sda4 rw,compress=lzo,ssd,discard,space_cache,subvolid=257,subvol=/system/sbin
mountid=611 fsname=/system/sbin dir=/sbin fstype=btrfs
Mounting read-only /lib
612 508 0:19 /system/lib /lib ro,relatime master:1 - btrfs /dev/sda4 rw,compress=lzo,ssd,discard,space_cache,subvolid=257,subvol=/system/lib
mountid=612 fsname=/system/lib dir=/lib fstype=btrfs
Mounting read-only /lib64
613 508 0:19 /system/lib64 /lib64 ro,relatime master:1 - btrfs /dev/sda4 rw,compress=lzo,ssd,discard,space_cache,subvolid=257,subvol=/system/lib64
mountid=613 fsname=/system/lib64 dir=/lib64 fstype=btrfs
Mounting tmpfs on /var/lock
Mounting tmpfs on /var/tmp
Mounting tmpfs on /var/log
Create the new utmp file
Mount the new utmp file
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 a new /home directory
Mounting a new /root directory
Mounting tmpfs on /compat/home/houseofsuns
Error while opening directory: fs.c:442 fs_tmpfs: No such file or directory
Error: proc 2594539 cannot sync with peer: unexpected EOF
Peer 2594540 unexpectedly exited with status 1

I also did not see any messages in the log files originating from firejail.

<!-- gh-comment-id:609473220 --> @houseofsuns commented on GitHub (Apr 5, 2020): @smitsohu I just had another go at it, but no different result. Here my passwd-settings: <pre> $ grep houseofsuns /etc/passwd houseofsuns:x:1001:1001::/compat/home/houseofsuns:/bin/zsh </pre> And here a full debug output: <pre> $ firejail --debug --noprofile --private firefox -no-remote Autoselecting /bin/zsh as shell Building quoted command line: 'firefox' '-no-remote' Command name #firefox# DISPLAY=:1 parsed as 1 Using the local network stack Parent pid 2594539, child pid 2594540 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 Creating empty /run/firejail/mnt/seccomp/seccomp.postexec32 file Mounting /proc filesystem representing the PID namespace Basic read-only filesystem: Mounting read-only /etc 537 508 0:19 /system/etc /etc ro,relatime master:1 - btrfs /dev/sda4 rw,compress=lzo,ssd,discard,space_cache,subvolid=257,subvol=/system/etc mountid=537 fsname=/system/etc dir=/etc fstype=btrfs Mounting noexec /etc 538 537 0:19 /system/etc /etc ro,nosuid,nodev,noexec,relatime master:1 - btrfs /dev/sda4 rw,compress=lzo,ssd,discard,space_cache,subvolid=257,subvol=/system/etc mountid=538 fsname=/system/etc dir=/etc fstype=btrfs Mounting read-only /var 599 597 0:39 / /var/lib/nfs/rpc_pipefs rw,relatime master:70 - rpc_pipefs sunrpc rw mountid=599 fsname=/ dir=/var/lib/nfs/rpc_pipefs fstype=rpc_pipefs Mounting read-only /var/tmp/portage 600 598 0:34 / /var/tmp/portage ro,relatime master:58 - tmpfs tmpfs rw,size=31457280k mountid=600 fsname=/ dir=/var/tmp/portage fstype=tmpfs Mounting read-only /var/lib/nfs/rpc_pipefs 601 599 0:39 / /var/lib/nfs/rpc_pipefs ro,relatime master:70 - rpc_pipefs sunrpc rw mountid=601 fsname=/ dir=/var/lib/nfs/rpc_pipefs fstype=rpc_pipefs Mounting noexec /var 606 605 0:39 / /var/lib/nfs/rpc_pipefs ro,relatime master:70 - rpc_pipefs sunrpc rw mountid=606 fsname=/ dir=/var/lib/nfs/rpc_pipefs fstype=rpc_pipefs Mounting noexec /var/tmp/portage 607 604 0:34 / /var/tmp/portage ro,nosuid,nodev,noexec,relatime master:58 - tmpfs tmpfs rw,size=31457280k mountid=607 fsname=/ dir=/var/tmp/portage fstype=tmpfs Mounting noexec /var/lib/nfs/rpc_pipefs 608 606 0:39 / /var/lib/nfs/rpc_pipefs ro,nosuid,nodev,noexec,relatime master:70 - rpc_pipefs sunrpc rw mountid=608 fsname=/ dir=/var/lib/nfs/rpc_pipefs fstype=rpc_pipefs Mounting read-only /usr 609 508 0:19 /system/usr /usr ro,relatime master:1 - btrfs /dev/sda4 rw,compress=lzo,ssd,discard,space_cache,subvolid=257,subvol=/system/usr mountid=609 fsname=/system/usr dir=/usr fstype=btrfs Mounting read-only /bin 610 508 0:19 /system/bin /bin ro,relatime master:1 - btrfs /dev/sda4 rw,compress=lzo,ssd,discard,space_cache,subvolid=257,subvol=/system/bin mountid=610 fsname=/system/bin dir=/bin fstype=btrfs Mounting read-only /sbin 611 508 0:19 /system/sbin /sbin ro,relatime master:1 - btrfs /dev/sda4 rw,compress=lzo,ssd,discard,space_cache,subvolid=257,subvol=/system/sbin mountid=611 fsname=/system/sbin dir=/sbin fstype=btrfs Mounting read-only /lib 612 508 0:19 /system/lib /lib ro,relatime master:1 - btrfs /dev/sda4 rw,compress=lzo,ssd,discard,space_cache,subvolid=257,subvol=/system/lib mountid=612 fsname=/system/lib dir=/lib fstype=btrfs Mounting read-only /lib64 613 508 0:19 /system/lib64 /lib64 ro,relatime master:1 - btrfs /dev/sda4 rw,compress=lzo,ssd,discard,space_cache,subvolid=257,subvol=/system/lib64 mountid=613 fsname=/system/lib64 dir=/lib64 fstype=btrfs Mounting tmpfs on /var/lock Mounting tmpfs on /var/tmp Mounting tmpfs on /var/log Create the new utmp file Mount the new utmp file 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 a new /home directory Mounting a new /root directory Mounting tmpfs on /compat/home/houseofsuns Error while opening directory: fs.c:442 fs_tmpfs: No such file or directory Error: proc 2594539 cannot sync with peer: unexpected EOF Peer 2594540 unexpectedly exited with status 1 </pre> I also did not see any messages in the log files originating from firejail.

gitea-mirror commented 2026-05-05 08:44:44 -06:00

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@matu3ba commented on GitHub (Apr 9, 2020):

@houseofsuns
In fs.c:442 fs_tmpfs:
// get a file descriptor for dir, fails if there is any symlink
Not sure, if printing dir in line 441 would help.
Did you try that to check the output?

The comment states that symlinks are not implemented yet, but I cant find the issue on that.

<!-- gh-comment-id:611311355 --> @matu3ba commented on GitHub (Apr 9, 2020): @houseofsuns In `fs.c:442 fs_tmpfs`: // get a file descriptor for dir, fails if there is any symlink Not sure, if [printing](https://stackoverflow.com/questions/15545285/can-gdb-print-a-specific-variable-every-time-it-breaks/15546929#15546929) dir in line 441 would help. Did you try that to check the output? The comment states that symlinks are not implemented yet, but I cant find the issue on that.

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