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Eric W. Biederman authored
Sharing mount subtress with mount namespaces created by unprivileged users allows unprivileged mounts created by unprivileged users to propagate to mount namespaces controlled by privileged users. Prevent nasty consequences by changing shared subtrees to slave subtress when an unprivileged users creates a new mount namespace. Acked-by:
Serge Hallyn <serge.hallyn@canonical.com> Signed-off-by:
"Eric W. Biederman" <ebiederm@xmission.com> (cherry picked from commit 7a472ef4be8387bc05a42e16309b02c8ca943a40)
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