How to prevent ChromeOS from placing a noexec flag on a mounted device?

[undyinglight]

I am not much of a power user so please forgive me if some of my terminology is not 100% accurate in what I am trying to describe. I know that as a security measure ChromeOS prevents things like USB drives and SD Cards from running executable programs. I often use Ubuntu through Crouton for things that I do and it would make things far more convenient for me if this was possible to disable.

For example if I want to play DOTA 2 installed on an SD Card I would swap over to Ubuntu plug in the SD Card and then need to mount it via the command Line in Ubuntu by typing in something like 'sudo mount -t vfat -o defaults,nosuid,nodev /dev/mmcblk1p1 /home/ubuntu/SDcard'

Is it possible to disable this feature so that I could just plug in an SD Card and run DOTA 2 without first inputting that into the command line, or plug in a USB Drive with an exe of Blender on it without having to mount that from the command line either? This would be of massive convenience and a big time saver if I could get this working as I want it. Thank you all for your help.

[beliefless dogmasless]

Here, some track:
https://www.reddit.com/r/chromeos/comments/7q57dm/where_is_fstab_on_chromeos/

Perso., I did not 'yet' figure out, where it was "exaclty".

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[Mike Frysinger]

it is not possible to disable noexec/nodev/nosuid by design.  your only option is to remount.

-mike

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[Mike Frysinger]

there is no /etc/fstab in CrOS.  any mount points are hardcoded in various startup scripts (like pre-startup.conf and pstore.conf in /etc/init/, or /sbin/chromeos_startup).  CrOS, by design, does not need or want /etc/fstab.  i'm not sure where the blank file is coming from in CrOS, but we could install a stub file with a comment like "CrOS does not use this at all.".

all the dynamic mounts from zip/rar/USB sticks are managed by the cros-disks daemon.  it doesn't look at /etc/fstab either.

-mike

On Tue, Feb 13, 2018 at 4:13 PM, beliefless dogmasless <katr...@gmail.com> wrote:

Here, some track:
https://www.reddit.com/r/chromeos/comments/7q57dm/where_is_fstab_on_chromeos/

Perso., I did not 'yet' figure out, where it was "exaclty".

On Tue, Feb 13, 2018 at 10:10 PM undyinglight <sammywil...@gmail.com> wrote:

I am not much of a power user so please forgive me if some of my terminology is not 100% accurate in what I am trying to describe. I know that as a security measure ChromeOS prevents things like USB drives and SD Cards from running executable programs. I often use Ubuntu through Crouton for things that I do and it would make things far more convenient for me if this was possible to disable.

For example if I want to play DOTA 2 installed on an SD Card I would swap over to Ubuntu plug in the SD Card and then need to mount it via the command Line in Ubuntu by typing in something like 'sudo mount -t vfat -o defaults,nosuid,nodev /dev/mmcblk1p1 /home/ubuntu/SDcard'

Is it possible to disable this feature so that I could just plug in an SD Card and run DOTA 2 without first inputting that into the command line, or plug in a USB Drive with an exe of Blender on it without having to mount that from the command line either? This would be of massive convenience and a big time saver if I could get this working as I want it. Thank you all for your help.

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[undyinglight]

That is unfortunate.  Just a minor inconvenience to live with then.  Thank you for the clarification.

On Tuesday, February 13, 2018 at 1:17:45 PM UTC-8, Mike Frysinger wrote:

it is not possible to disable noexec/nodev/nosuid by design.  your only option is to remount.

-mike

On Tue, Feb 13, 2018 at 4:10 PM, undyinglight <sammywil...@gmail.com> wrote:

I am not much of a power user so please forgive me if some of my terminology is not 100% accurate in what I am trying to describe. I know that as a security measure ChromeOS prevents things like USB drives and SD Cards from running executable programs. I often use Ubuntu through Crouton for things that I do and it would make things far more convenient for me if this was possible to disable.

For example if I want to play DOTA 2 installed on an SD Card I would swap over to Ubuntu plug in the SD Card and then need to mount it via the command Line in Ubuntu by typing in something like 'sudo mount -t vfat -o defaults,nosuid,nodev /dev/mmcblk1p1 /home/ubuntu/SDcard'

Is it possible to disable this feature so that I could just plug in an SD Card and run DOTA 2 without first inputting that into the command line, or plug in a USB Drive with an exe of Blender on it without having to mount that from the command line either? This would be of massive convenience and a big time saver if I could get this working as I want it. Thank you all for your help.

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