** Description changed: I'm trying to mount a Samba share on an Ubuntu system. Both server and client are Ubuntu machines. On the server, the directory shared (outer directory) belongs to a user different from mine, but the owner of the outer directory has granted everyone traverse permission (chmod 0711, basically) to access an inner directory, of which I have been given read access (using setfacl, rx permission). When I am running as myself locally on the server, I can access the inner directory. I can also do so logging in as myself from a Windows machine and accessing the inner directory. However, when accessing the inner directory via an Ubuntu client, I get permission denied even with `noperm` set (but expected this to succeed, exactly like the Windows client.) I have tried to distil this down into a reproduce script which can be run on a single machine: # Install dependencies sudo apt install --yes samba cifs-utils sudo smbpasswd -a $USER # Add a password # Set up shares mkdir ~/samba sudo mkdir -p ~/samba/outer/inner sudo chmod 0711 ~/samba/outer ~/samba/outer/inner sudo setfacl -m u:$USER:rx ~/samba/outer/inner cat <<-SAMBA | sudo tee -a /etc/samba/smb.conf [test] path = $HOME/samba browseable = yes read only = no guest ok = no SAMBA sudo systemctl restart smbd nmbd # Mount the share sudo mkdir /media/$USER sudo chown $USER /media/$USER mkdir /media/$USER/samba sudo mount //localhost/test /media/$USER/samba -t cifs -o vers=3.1.1,user=$USER,noperm # Test local access ls -la ~/samba ~/samba/outer ~/samba/outer/inner # ~/samba lists fine, ~/samba/outer Permission denied, ~/samba/outer/inner lists fine. # Test mount access - ls -la /media/$USER/samba /media/$USER/samba/outer /media/$USER/samba/outer/inner # /media/$USER/samba lists fine, others Permission denied + ls -la /media/$USER/samba /media/$USER/samba/outer /media/$USER/samba/outer/inner # /media/$USER/samba lists fine, others Permission denied (inner should have listed fine) # On a Windows machine net use T: \\<ip>\test /User:$USER * dir T:\ # OK dir T:\outer # File not found dir T:\outer\inner # OK I have run this script on a fresh Ubuntu 21.04 desktop install and observed this behaviour. However, the trigger for this investigation was observed on an Ubuntu 20.04.2 server install (both server and client). lsb_release -rd: Ubuntu 21.04 uname -srv: Linux 5.11.0-25-generic #27-Ubuntu SMP Fri Jul 9 23:06:29 UTC 2021 cifs-utils package version: 2:6.11-1ubuntu1
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1939968 Title: Directory traversal permission not respected even with noperm To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cifs-utils/+bug/1939968/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
