userns: add a user namespace owner of ipc ns
Changelog:
Feb 15: Don't set new ipc->user_ns if we didn't create a new
ipc_ns.
Feb 23: Move extern declaration to ipc_namespace.h, and group
fwd declarations at top.
Signed-off-by: Serge E. Hallyn <serge.hallyn@canonical.com>
Acked-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Daniel Lezcano <daniel.lezcano@free.fr>
Acked-by: David Howells <dhowells@redhat.com>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c
index b97fc9d..ac8a56e 100644
--- a/kernel/nsproxy.c
+++ b/kernel/nsproxy.c
@@ -80,6 +80,11 @@
err = PTR_ERR(new_nsp->ipc_ns);
goto out_ipc;
}
+ if (new_nsp->ipc_ns != tsk->nsproxy->ipc_ns) {
+ put_user_ns(new_nsp->ipc_ns->user_ns);
+ new_nsp->ipc_ns->user_ns = task_cred_xxx(tsk, user)->user_ns;
+ get_user_ns(new_nsp->ipc_ns->user_ns);
+ }
new_nsp->pid_ns = copy_pid_ns(flags, task_active_pid_ns(tsk));
if (IS_ERR(new_nsp->pid_ns)) {