Comment 2 for bug 304959

Thanks for your suggestion. As you noted, Ubuntu doesn't create a partition for /tmp, and unfortunately binding and remounting the tmp directory doesn't prevent users from executing files.

$ sudo mount -o bind /tmp /tmp
$ sudo mount -o remount,bind,nosuid /tmp /tmp
$ echo '#!/bin/echo' > foo
$ chmod +x foo
$ ./foo
./foo

The mount manual page explains this:

"Note that the filesystem mount options will remain the same as those on the original mount point, and cannot be changed by passing the -o option along with --bind/--rbind."

I'm marking this bug as invalid because it's not something we can currently impliment.

Thank You,

-Dave