units: restrict hugepages fs a bit

suid binaries and device nodes should not be placed there, hence forbid
it.

Of all the API VFS we mount from PID 1 or via a unit file this one is
the only one where we didn't add MS_NODEV/MS_NOSUID. Let's address that,
since there's really no reason why device nodes or suid binaries would
be placed in hugetlbfs.

diff --git a/units/dev-hugepages.mount b/units/dev-hugepages.mount
index 1a34da128596848443c6868e6a07a480c043090b..88cd89d56349161cd8b37477944854404098117b 100644 (file)
--- a/units/dev-hugepages.mount
+++ b/units/dev-hugepages.mount
@@ -21,3 +21,4 @@ ConditionVirtualization=!private-users
 What=hugetlbfs
 Where=/dev/hugepages
 Type=hugetlbfs
+Options=nosuid,nodev