/dev/shm is a world-writable directory, like /tmp, and should also
have the sticky bit set. Without this, any user can delete and
replace another user's files in /dev/shm.
This bug has been present since /dev/shm was added to the skeleton
/etc/fstab, but appears to have been fixed for systems using systemd
by commit 76fc9275f1 "system: separate sysv and systemd parts of the
skeleton" which went into Buildroot 2017.08.
Signed-off-by: Ben Hutchings <ben.hutchings@mind.be>
Fixes: 22fde22e35
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 0b2967e158)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
3d1c04c05c