github-starred/firejail
2
0
Fork 0
mirror of https://github.com/netblue30/firejail.git synced 2026-05-15 14:16:14 -06:00
Code Issues 531 Projects Packages Wiki Activity Actions 6

[GH-ISSUE #4646] private-bin throws fopen: Permission denied after latest related commits #2738

New issue
Closed
opened 2026-05-05 09:24:13 -06:00 by gitea-mirror · 6 comments
gitea-mirror commented 2026-05-05 09:24:13 -06:00
Owner
Copy link

Originally created by @ghost on GitHub (Oct 27, 2021).
Original GitHub issue: https://github.com/netblue30/firejail/issues/4646

Profiles with private-bin recently started to throw fopen: Permission denied for me with firejail built from git:

$ firejail --ignore=quiet --private-bin=bash
Reading profile /etc/firejail/default.profile
Reading profile /etc/firejail/disable-common.inc
Reading profile /etc/firejail/disable-common.local
Reading profile /etc/firejail/disable-programs.inc
Reading profile /etc/firejail/disable-programs.local

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

Parent pid 3823180, child pid 3823200
fopen: Permission denied
1 program installed in 23.09 ms
Child process initialized in 778.53 ms

Compare that to:

$ firejail --ignore=quiet
Reading profile /etc/firejail/default.profile
Reading profile /etc/firejail/disable-common.inc
Reading profile /etc/firejail/disable-common.local
Reading profile /etc/firejail/disable-programs.inc
Reading profile /etc/firejail/disable-programs.local

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

Parent pid 3828120, child pid 3828125
Child process initialized in 342.88 ms

Bisecting points to these commits:

7f0b5ddd88
ee1d5d7c8c
98df98e998

@smitsohu Any insights on why this could be happening?

Originally created by @ghost on GitHub (Oct 27, 2021). Original GitHub issue: https://github.com/netblue30/firejail/issues/4646 Profiles with `private-bin` recently started to throw `fopen: Permission denied` for me with firejail built from git: ``` $ firejail --ignore=quiet --private-bin=bash Reading profile /etc/firejail/default.profile Reading profile /etc/firejail/disable-common.inc Reading profile /etc/firejail/disable-common.local Reading profile /etc/firejail/disable-programs.inc Reading profile /etc/firejail/disable-programs.local ** Note: you can use --noprofile to disable default.profile ** Parent pid 3823180, child pid 3823200 fopen: Permission denied 1 program installed in 23.09 ms Child process initialized in 778.53 ms ``` Compare that to: ``` $ firejail --ignore=quiet Reading profile /etc/firejail/default.profile Reading profile /etc/firejail/disable-common.inc Reading profile /etc/firejail/disable-common.local Reading profile /etc/firejail/disable-programs.inc Reading profile /etc/firejail/disable-programs.local ** Note: you can use --noprofile to disable default.profile ** Parent pid 3828120, child pid 3828125 Child process initialized in 342.88 ms ``` Bisecting points to these commits: https://github.com/netblue30/firejail/commit/7f0b5ddd8881c5276138b061109ab48eb5165201 https://github.com/netblue30/firejail/commit/ee1d5d7c8cb2f7b3ab81125168881040f5d17d48 https://github.com/netblue30/firejail/commit/98df98e9987357f893cdd1b0f5c9aa8d93ae8d23 @smitsohu Any insights on why this could be happening?
gitea-mirror commented 2026-05-05 09:24:15 -06:00
Author
Owner
Copy link

@rusty-snake commented on GitHub (Oct 27, 2021):

Minimal STR: firejail --noprofile --private-bin=true true

Snipped from --debug:

Copying files in the new bin directory
Checking /usr/local/bin/true
Checking /usr/bin/true
sbox run: /run/firejail/lib/fcopy /usr/bin/true /run/firejail/mnt/bin 
Relabeling /run/firejail/mnt/bin/true as /usr/bin/true (system_u:object_r:bin_t:s0)
fopen: Permission denied
Mount-bind /run/firejail/mnt/bin on top of /usr/local/bin
Mount-bind /run/firejail/mnt/bin on top of /usr/bin
Mount-bind /run/firejail/mnt/bin on top of /bin
Mount-bind /run/firejail/mnt/bin on top of /usr/games
Mount-bind /run/firejail/mnt/bin on top of /usr/sbin
Mount-bind /run/firejail/mnt/bin on top of /sbin
Relabeling /run/firejail/mnt/bin as /bin (system_u:object_r:bin_t:s0)
1 program installed in 8.21 ms
<!-- gh-comment-id:952720310 --> @rusty-snake commented on GitHub (Oct 27, 2021): Minimal STR: `firejail --noprofile --private-bin=true true` Snipped from `--debug`: ``` Copying files in the new bin directory Checking /usr/local/bin/true Checking /usr/bin/true sbox run: /run/firejail/lib/fcopy /usr/bin/true /run/firejail/mnt/bin Relabeling /run/firejail/mnt/bin/true as /usr/bin/true (system_u:object_r:bin_t:s0) fopen: Permission denied Mount-bind /run/firejail/mnt/bin on top of /usr/local/bin Mount-bind /run/firejail/mnt/bin on top of /usr/bin Mount-bind /run/firejail/mnt/bin on top of /bin Mount-bind /run/firejail/mnt/bin on top of /usr/games Mount-bind /run/firejail/mnt/bin on top of /usr/sbin Mount-bind /run/firejail/mnt/bin on top of /sbin Relabeling /run/firejail/mnt/bin as /bin (system_u:object_r:bin_t:s0) 1 program installed in 8.21 ms ```
gitea-mirror commented 2026-05-05 09:24:16 -06:00
Author
Owner
Copy link

@smitsohu commented on GitHub (Oct 27, 2021):

Thanks!

The message is coming from here:
efbf74e124/src/firejail/fs_logger.c (L91-L100)

If private-bin is the first to call fs_logger_print() it must be root to create the file. I'll push a fix shortly.

<!-- gh-comment-id:952886837 --> @smitsohu commented on GitHub (Oct 27, 2021): Thanks! The message is coming from here: https://github.com/netblue30/firejail/blob/efbf74e12421c97d8a1756649422f83f4a0b7e50/src/firejail/fs_logger.c#L91-L100 If `private-bin` is the first to call fs_logger_print() it must be root to create the file. I'll push a fix shortly.
gitea-mirror commented 2026-05-05 09:24:17 -06:00
Author
Owner
Copy link

@smitsohu commented on GitHub (Oct 27, 2021):

I'll push a fix shortly.

Ah sorry, I didn't see that @glitsj16 already wanted to work on it. It's yours :)

<!-- gh-comment-id:952895865 --> @smitsohu commented on GitHub (Oct 27, 2021): > I'll push a fix shortly. Ah sorry, I didn't see that @glitsj16 already wanted to work on it. It's yours :)
gitea-mirror commented 2026-05-05 09:24:17 -06:00
Author
Owner
Copy link

@ghost commented on GitHub (Oct 27, 2021):

Ah sorry, I didn't see that @glitsj16 already wanted to work on it. It's yours :)

I'm not sure what happened, but I think GitHub assigned me automatically somehow.
@smitsohu I don't want to break things, please push your fix :)

<!-- gh-comment-id:953170716 --> @ghost commented on GitHub (Oct 27, 2021): > Ah sorry, I didn't see that @glitsj16 already wanted to work on it. It's yours :) I'm not sure what happened, but I think GitHub assigned me automatically somehow. @smitsohu I don't want to break things, please push your fix :)
gitea-mirror commented 2026-05-05 09:24:18 -06:00
Author
Owner
Copy link

@smitsohu commented on GitHub (Oct 28, 2021):

Well... it looks like I am breaking things, too ;)

<!-- gh-comment-id:953865839 --> @smitsohu commented on GitHub (Oct 28, 2021): Well... it looks like I am breaking things, too ;)
gitea-mirror commented 2026-05-05 09:24:18 -06:00
Author
Owner
Copy link

@smitsohu commented on GitHub (Oct 29, 2021):

Fixed!

<!-- gh-comment-id:954610484 --> @smitsohu commented on GitHub (Oct 29, 2021): Fixed!
Sign in to join this conversation.
No Branch/Tag specified
Branches Tags
master
serialize_remounts_v2
landlock_v4
landlock
release-0.9.64
release-0.9.62
gitlab_ci
LTSbase
fred_ctests
docs
0.9.80
0.9.80-rc1
0.9.78
0.9.76
0.9.76-rc4
0.9.76-rc3
0.9.76-rc2
0.9.76-rc1
0.9.74
landlock-split
0.9.72
0.9.72rc1
0.9.70
0.9.68
0.9.68rc1
0.9.66
0.9.66rc1
0.9.64.4
0.9.64.2
0.9.64
0.9.64rc1
0.9.62.4
0.9.62.2
0.9.62
0.9.56.2-LTS
0.9.60
0.9.60-rc1
0.9.58.2
0.9.58
0.9.58-rc1
0.9.56-LTS-release
0.9.56-LTS
0.9.56
0.9.56-rc1
0.9.54
0.9.54-rc2
0.9.54-rc1
0.9.52
0.9.38.12
0.9.50
0.9.50-rc1
0.9.48
0.9.46
0.9.46-rc1
0.9.44.10
0.9.44.8
0.9.44.6
0.9.38.10
0.9.44.4
0.9.38.8
0.9.44.2
0.9.44
0.9.44-rc1
0.9.38.4
0.9.42
0.9.42-rc2
0.9.38.2
0.9.42-rc1
disable-globalcfg
0.9.40
0.9.40-rc1
0.9.38
0.9.38-rc1
0.9.36
0.9.36-rc1
0.9.34
0.9.34-rc1
0.9.32
0.9.32-rc1
0.9.30
0.9.30-rc1
Labels
Clear labels   
LTS merge

   
LTS merge

   
bug

   
bug

   
converted-to-discussion

   
doc-todo

   
documentation

   
duplicate

   
enhancement

   
file-transfer

   
firecfg

   
firejail-in-firejail

   
firetools

   
graphics

   
help wanted

   
information_old

   
installation

   
invalid

   
modif

   
moved

   
needinfo

   
networking

   
notabug

   
notourbug

   
old-version

   
overlayfs

   
packaging

   
profile-request

   
pull-request

Mirrored from GitHub Pull Request

  
question

   
question_old

   
removal

   
runtime-permissions

   
sandbox-ipc

   
security

   
stale

   
wiki

   
wiki

   
wontfix

   
wordpress

   
workaround
No labels
LTS merge
LTS merge
bug
bug
converted-to-discussion
doc-todo
documentation
duplicate
enhancement
file-transfer
firecfg
firejail-in-firejail
firetools
graphics
help wanted
information_old
installation
invalid
modif
moved
needinfo
networking
notabug
notourbug
old-version
overlayfs
packaging
profile-request
pull-request
question
question_old
removal
runtime-permissions
sandbox-ipc
security
stale
wiki
wiki
wontfix
wordpress
workaround
Milestone
Clear milestone
No items
No milestone
Projects
Clear projects
No items
No project
Assignees
Clear assignees
No assignees
1 participant
Notifications
Due date
The due date is invalid or out of range. Please use the format "yyyy-mm-dd".

No due date set.

Dependencies

No dependencies set.

Reference: github-starred/firejail#2738
No description provided.
Delete branch "%!s()"

Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?