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chroot: remount everything as private in new mntns

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If parent of the destination path is shared, this
path will be unmounted from the parent ns even if
the path itself is private.

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
This commit is contained in:
Tonis Tiigi 2016-10-20 15:29:23 -07:00
parent 2c620d0aa2
commit b511d1f0ca
1 changed files with 6 additions and 1 deletions
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7
pkg/chrootarchive/chroot_linux.go
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@ -26,7 +26,12 @@ func chroot(path string) (err error) {
return fmt.Errorf("Error creating mount namespace before pivot: %v", err)
}
if err := mount.MakeRPrivate(path); err != nil {
// make everything in new ns private
if err := mount.MakeRPrivate("/"); err != nil {
return err
}
// ensure path is a mountpoint
if err := mount.MakePrivate(path); err != nil {
return err
}