From 65cc5a17ad3388f89ddc3d68226a09242656809b Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Mon, 12 Mar 2012 13:08:45 -0700 Subject: userns: Teach inode_capable to understand inodes whose uids map to other namespaces. Acked-by: Serge Hallyn Signed-off-by: Eric W. Biederman --- kernel/capability.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'kernel/capability.c') diff --git a/kernel/capability.c b/kernel/capability.c index cc5f0718215..493d9725948 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); } -- cgit v1.2.3