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    SubjectRe: [PATCH 31/43] userns: Teach inode_capable to understand inodes whose uids map to other namespaces.
    Quoting Eric W. Beiderman (ebiederm@xmission.com):
    > From: Eric W. Biederman <ebiederm@xmission.com>
    >
    > Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

    Acked-by: Serge Hallyn <serge.hallyn@canonical.com>

    > ---
    > kernel/capability.c | 6 ++++--
    > 1 files changed, 4 insertions(+), 2 deletions(-)
    >
    > diff --git a/kernel/capability.c b/kernel/capability.c
    > index cc5f071..493d972 100644
    > --- a/kernel/capability.c
    > +++ b/kernel/capability.c
    > @@ -429,12 +429,14 @@ bool nsown_capable(int cap)
    > * targeted at it's own user namespace and that the given inode is owned
    > * by the current user namespace or a child namespace.
    > *
    > - * Currently inodes can only be owned by the initial user namespace.
    > + * Currently we check to see if an inode is owned by the current
    > + * user namespace by seeing if the inode's owner maps into the
    > + * current user namespace.
    > *
    > */
    > bool inode_capable(const struct inode *inode, int cap)
    > {
    > struct user_namespace *ns = current_user_ns();
    >
    > - return ns_capable(ns, cap) && (ns == &init_user_ns);
    > + return ns_capable(ns, cap) && kuid_has_mapping(ns, inode->i_uid);
    > }
    > --
    > 1.7.2.5
    >
    > _______________________________________________
    > Containers mailing list
    > Containers@lists.linux-foundation.org
    > https://lists.linuxfoundation.org/mailman/listinfo/containers


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