Your message dated Mon, 28 Dec 2020 01:56:47 +0100
with message-id <[email protected]>
and subject line Re: Bug#950771: mount: unexpected behaviour with "-f" option
has caused the Debian Bug report #950771,
regarding mount: unexpected behaviour with "-f" option
to be marked as done.
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--
950771: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=950771
Debian Bug Tracking System
Contact [email protected] with problems
--- Begin Message ---
Package: mount
Version: 2.33.1-0.1
Severity: minor
-- Additional info:
Using mount with '-f' will write to /run/mount/utab.
I think the '-n' option should be included implicitly since it is just a
simulation?
When the root user does a mount with '-f' on a device previously mounted by
another user granted with option 'user' specified in an entry of /etc/fstab,
an umount by the original user will cause a 'umount failed: Operation not
permitted'
-- Comments/feeback/question:
Not sure how and if namespaces/context option can help alter user/group during
a mount by root user.
Is there a way to restict which user/group can mount a device using
user=XXX,group=xxx option in /etc/fstab since that is how /run/mount/utab is
recorded?
-- System Information:
Debian Release: 10.2
APT prefers stable-updates
APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 4.19.0-6-amd64 (SMP w/8 CPU cores)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=C.UTF-8
(charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages mount depends on:
ii libblkid1 2.33.1-0.1
ii libc6 2.28-10
ii libmount1 2.33.1-0.1
ii libselinux1 2.8-1+b1
ii libsmartcols1 2.33.1-0.1
ii util-linux 2.33.1-0.1
mount recommends no packages.
Versions of packages mount suggests:
pn nfs-common <none>
-- no debconf information
--- End Message ---
--- Begin Message ---
* Simon <[email protected]> [201228 00:54]:
> Using mount with '-f' will write to /run/mount/utab.
> I think the '-n' option should be included implicitly since it is just a
> simulation?
No. The man page even says (paraphrased) "-f can be used after -n".
> When the root user does a mount with '-f' on a device previously mounted by
> another user granted with option 'user' specified in an entry of /etc/fstab,
> an umount by the original user will cause a 'umount failed: Operation not
> permitted'
Thats probably expected.
> -- Comments/feeback/question:
> Not sure how and if namespaces/context option can help alter user/group
> during a mount by root user.
> Is there a way to restict which user/group can mount a device using
> user=XXX,group=xxx option in /etc/fstab since that is how /run/mount/utab is
> recorded?
Not using mount or in /etc/fstab. Maybe policykit can provide finer
grained control.
Closing this for now.
Chris
--- End Message ---
