Various mount options have changed in Core Update 169

["Peter Müller" <peter.mueller@ipfire.org>]

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Hello *,

while pre-testing Core Update 169, it came to my attention that, for some reason,
various mount options have changed since Core Update 168, lacking options such as
"nodev", "noexec", "nosuid", which means a security downgrade.

The complete delta is as follows:

$ diff -Naur before after
--- before	2022-06-20 20:04:32.436632074 +0000
+++ after	2022-06-20 20:04:34.500401575 +0000
@@ -1,12 +1,12 @@
-devpts on /dev/pts type devpts (rw,relatime,gid=5,mode=620,ptmxmode=000)
+devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
 /dev/sda1 on /boot type ext4 (rw,relatime)
 /dev/sda2 on /boot/efi type vfat (rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=ascii,shortname=mixed,errors=remount-ro)
 /dev/sda4 on / type ext4 (rw,relatime)
-devtmpfs on /dev type devtmpfs (rw,relatime,size=1963708k,nr_inodes=490927,mode=755)
+devtmpfs on /dev type devtmpfs (rw,nosuid,noexec,size=1949992k,nr_inodes=487498,mode=755)
 efivarfs on /sys/firmware/efi/efivars type efivarfs (rw,relatime)
 none on /sys/fs/cgroup type cgroup2 (rw,relatime)
-/proc on /proc type proc (rw,relatime)
-/run on /run type tmpfs (rw,nosuid,nodev,relatime,size=8192k,mode=755)
-/sys on /sys type sysfs (rw,relatime)
-tmpfs on /dev/shm type tmpfs (rw,relatime)
+proc on /proc type proc (rw,nosuid,nodev,noexec,relatime)
+sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime)
+tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev,noexec)
+tmpfs on /run type tmpfs (rw,nosuid,nodev,noexec,mode=755)
 /var/lock on /var/lock type tmpfs (rw,nosuid,nodev,relatime,size=8192k)

I cannot recall of having this explicitly changed anywhere, and don't understand
the root cause for this (unwanted) change. Could somebody please point me into the
right direction? :-)

Thanks in advance, and best regards,
Peter Müller