mnt: Implicitly add MNT_NODEV on remount when it was implicitly added by mount
authorEric W. Biederman <ebiederm@xmission.com>
Wed, 13 Aug 2014 08:33:38 +0000 (01:33 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 8 Jan 2015 17:58:16 +0000 (09:58 -0800)
commit4be461b16020beb18a0cd680ec74ba63f83b677c
treec04af38751b5198e710fd6d94b16b9c0794cc449
parent5f37daa4cbd955afb1eba2909bf24daea20fd37c
mnt: Implicitly add MNT_NODEV on remount when it was implicitly added by mount

commit 3e1866410f11356a9fd869beb3e95983dc79c067 upstream.

Now that remount is properly enforcing the rule that you can't remove
nodev at least sandstorm.io is breaking when performing a remount.

It turns out that there is an easy intuitive solution implicitly
add nodev on remount when nodev was implicitly added on mount.

Tested-by: Cedric Bosdonnat <cbosdonnat@suse.com>
Tested-by: Richard Weinberger <richard@nod.at>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
fs/namespace.c