userns: limit the maximum depth of user_namespace->parent chain

[linux-imx.git] / include / linux / user_namespace.h

diff --git a/include/linux/user_namespace.h b/include/linux/user_namespace.h
index b6b215f13b453091ff2be0fae11b37a5a51c0c84..14105c26a83618da5d91ae09331fb83ba8f8ad6b 100644 (file)
--- a/include/linux/user_namespace.h
+++ b/include/linux/user_namespace.h
@@ -23,6 +23,7 @@ struct user_namespace {
        struct uid_gid_map      projid_map;
        atomic_t                count;
        struct user_namespace   *parent;
+       int                     level;
        kuid_t                  owner;
        kgid_t                  group;
        unsigned int            proc_inum;