[Pkg-samba-maint] Bug#586009: cifs-utils: mount.cifs will mount as user, but requires root to unmount

[James Zuelow]

Package: cifs-utils
Version: 2:4.5-2
Severity: normal


I appreciate the new cifs.utils version coming down as I can now mount CIFS shares as a regular user.

However I cannot UNMOUNT the shares as a regular user.

In the past, this was accomplished by ensuring that both mount.cifs and umount.cifs were setuid root.

With the current version it appears that the cifs.utils package no longer includes umount.cifs.

Here is an example of the behavior I am seeing:

        Mount cifs share:
james at mis-jz-lnx:~$ mount G

        List mounts:
james at mis-jz-lnx:~$ mount
/dev/sda1 on / type ext3 (rw,acl,errors=remount-ro)
tmpfs on /lib/init/rw type tmpfs (rw,nosuid,mode=0755)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
udev on /dev type tmpfs (rw,mode=0755)
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev)
devpts on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=620)
/dev/sdb1 on /home type ext3 (rw,acl)
fusectl on /sys/fs/fuse/connections type fusectl (rw)
binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev)
//files.ci.juneau.ak.us/james$/ on /home/james/G type cifs (rw,mand,nosuid,nodev,user=james)

        Attempt to umount cifs share:
james at mis-jz-lnx:~$ umount G
umount: /home/james/G mount disagrees with the fstab

        Unmount cifs share:
james at mis-jz-lnx:~$ sudo umount G
james at mis-jz-lnx:~$   [this was a success]

        Relevant fstab entry:

//files.ci.juneau.ak.us/james$      /home/james/G        cifs    acl,rw,user,noauto,credentials=/home/james/.nt/creds 0 0

I do some file archiving via cifs mounts that are manipulated via script, and the ability to run these scripts as a non-root user is important to me.  In the sudo example above, my password had not timed out yet so I was not prompted for one.  However when the script runs I would need to present the password, or edit /etc/sudoers to allow the command to complete without a password.

Editing the sudoers file to specifically allow unmounting this share without a password is a relatively simple workaround, but I would prefer the ability to mount and unmount as a regular user without that requirement.

Thank you!


-- System Information:
Debian Release: squeeze/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.32-5-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages cifs-utils depends on:
ii  libc6                     2.11.1-3       Embedded GNU C Library: Shared lib
ii  libcap2                   1:2.17-2       support for getting/setting POSIX.
ii  libkeyutils1              1.4-1          Linux Key Management Utilities (li
ii  libkrb5-3                 1.8.1+dfsg-5   MIT Kerberos runtime libraries
ii  libtalloc2                2.0.1-1        hierarchical pool based memory all
ii  samba-common              2:3.4.8~dfsg-1 common files used by both the Samb

cifs-utils recommends no packages.

Versions of packages cifs-utils suggests:
ii  smbclient                 2:3.4.8~dfsg-1 command-line SMB/CIFS clients for 

-- no debconf information