Comment 0 for bug 1881006

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Dimitri John Ledkov (xnox) wrote :

Previously we decided that ESP should be mounted with umask=0077

See https://bugs.launchpad.net/ubuntu/+source/partman-efi/+bug/1390183

This is also documented in https://wiki.ubuntu.com/FSTAB

However, in GCE instance /boot/efi is not mounted with umask=0077
fstab is:

LABEL=cloudimg-rootfs / ext4 defaults 0 0
LABEL=UEFI /boot/efi vfat defaults 0 0

And in mount options are:
(rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)

fstab should be fixed to specify "umask=0077" instead of "defaults" for the ESP partition