MIME-Version: 1.0
From: Rolf <baflubaf@gmail.com>
Date: Sun, 10 Aug 2025 19:50:19 +0200
Message-ID: <CALVR4_07MK9b_eUBydkuw4EOLvcerPZkp_7iBZnXr-2wLbEFbQ@mail.gmail.com>
Subject: Mount option `noexec` not working as expected?
To: alpine-user@lists.alpinelinux.org
Content-Type: text/plain; charset="UTF-8"

Dear friends

Alpine 3.22.1 x86_64

In my `/etc/fstab`, there is the following entry for my data
partition, as suggested in
https://wiki.alpinelinux.org/wiki/Securing_Alpine_Linux#User_and_access_management,
"2. Configure mount options":
'UUID=<uuid>  /vol/ext4  ext4  defaults,nosuid,nodev,noexec 0 2'

However, shell scripts in /vol/ext4/bin appear to be executable by the
owner all the
same:
```
$ ls -l /vol/ext4/bin/
total 4
-rwx------    1 <user>    <group>           24 Aug 10 18:55 hallo.sh
$ ./hallo.sh
/bin/ash: ./hallo.sh: Permission denied
$ $ ash ./hallo.sh
hallo!
```

If done by a different user:
```
$ ./hallo.sh
-ash: ./hallo.sh: Permission denied
$ ash ./hallo.sh
ash: can't open './hallo.sh': Permission denied
``

Is there something I have misunderstood about the concept of the `noexec`
option and shell scripts, or have I misconfigured something?

Many thanks and best regards

Rolf