[PATCH 11/43] userns: Start out with a full set of capabilities.

"Eric W. Beiderman
2012-04-08T05:22:30Z

From: Eric W. Biederman <ebiederm@xmission.com>

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
---
kernel/user_namespace.c | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)

diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c
index c15e533..e216e1e 100644
--- a/kernel/user_namespace.c
+++ b/kernel/user_namespace.c
@@ -11,6 +11,7 @@
#include <linux/user_namespace.h>
#include <linux/highuid.h>
#include <linux/cred.h>
+#include <linux/securebits.h>

static struct kmem_cache *user_ns_cachep __read_mostly;

@@ -52,6 +53,14 @@ int create_user_ns(struct cred *new)
new->gid = new->egid = new->sgid = new->fsgid = 0;
put_group_info(new->group_info);
new->group_info = get_group_info(&init_groups);
+ /* Start with the same capabilities as init but useless for doing
+ * anything as the capabilities are bound to the new user namespace.
+ */
+ new->securebits = SECUREBITS_DEFAULT;
+ new->cap_inheritable = CAP_EMPTY_SET;
+ new->cap_permitted = CAP_FULL_SET;
+ new->cap_effective = CAP_FULL_SET;
+ new->cap_bset = CAP_FULL_SET;
#ifdef CONFIG_KEYS
key_put(new->request_key_auth);
new->request_key_auth = NULL;
--
1.7.2.5