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-rw-r--r--ipc/msgutil.c2
-rw-r--r--ipc/namespace.c32
2 files changed, 27 insertions, 7 deletions
diff --git a/ipc/msgutil.c b/ipc/msgutil.c
index 26143d377c95..6471f1bdae96 100644
--- a/ipc/msgutil.c
+++ b/ipc/msgutil.c
@@ -16,6 +16,7 @@
#include <linux/msg.h>
#include <linux/ipc_namespace.h>
#include <linux/utsname.h>
+#include <linux/proc_fs.h>
#include <asm/uaccess.h>
#include "util.h"
@@ -30,6 +31,7 @@ DEFINE_SPINLOCK(mq_lock);
struct ipc_namespace init_ipc_ns = {
.count = ATOMIC_INIT(1),
.user_ns = &init_user_ns,
+ .proc_inum = PROC_IPC_INIT_INO,
};
atomic_t nr_ipc_ns = ATOMIC_INIT(1);
diff --git a/ipc/namespace.c b/ipc/namespace.c
index f362298c5ce4..cf3386a51de2 100644
--- a/ipc/namespace.c
+++ b/ipc/namespace.c
@@ -16,7 +16,7 @@
#include "util.h"
-static struct ipc_namespace *create_ipc_ns(struct task_struct *tsk,
+static struct ipc_namespace *create_ipc_ns(struct user_namespace *user_ns,
struct ipc_namespace *old_ns)
{
struct ipc_namespace *ns;
@@ -26,9 +26,16 @@ static struct ipc_namespace *create_ipc_ns(struct task_struct *tsk,
if (ns == NULL)
return ERR_PTR(-ENOMEM);
+ err = proc_alloc_inum(&ns->proc_inum);
+ if (err) {
+ kfree(ns);
+ return ERR_PTR(err);
+ }
+
atomic_set(&ns->count, 1);
err = mq_init_ns(ns);
if (err) {
+ proc_free_inum(ns->proc_inum);
kfree(ns);
return ERR_PTR(err);
}
@@ -46,19 +53,17 @@ static struct ipc_namespace *create_ipc_ns(struct task_struct *tsk,
ipcns_notify(IPCNS_CREATED);
register_ipcns_notifier(ns);
- ns->user_ns = get_user_ns(task_cred_xxx(tsk, user_ns));
+ ns->user_ns = get_user_ns(user_ns);
return ns;
}
struct ipc_namespace *copy_ipcs(unsigned long flags,
- struct task_struct *tsk)
+ struct user_namespace *user_ns, struct ipc_namespace *ns)
{
- struct ipc_namespace *ns = tsk->nsproxy->ipc_ns;
-
if (!(flags & CLONE_NEWIPC))
return get_ipc_ns(ns);
- return create_ipc_ns(tsk, ns);
+ return create_ipc_ns(user_ns, ns);
}
/*
@@ -113,6 +118,7 @@ static void free_ipc_ns(struct ipc_namespace *ns)
*/
ipcns_notify(IPCNS_REMOVED);
put_user_ns(ns->user_ns);
+ proc_free_inum(ns->proc_inum);
kfree(ns);
}
@@ -161,8 +167,12 @@ static void ipcns_put(void *ns)
return put_ipc_ns(ns);
}
-static int ipcns_install(struct nsproxy *nsproxy, void *ns)
+static int ipcns_install(struct nsproxy *nsproxy, void *new)
{
+ struct ipc_namespace *ns = new;
+ if (!ns_capable(ns->user_ns, CAP_SYS_ADMIN))
+ return -EPERM;
+
/* Ditch state from the old ipc namespace */
exit_sem(current);
put_ipc_ns(nsproxy->ipc_ns);
@@ -170,10 +180,18 @@ static int ipcns_install(struct nsproxy *nsproxy, void *ns)
return 0;
}
+static unsigned int ipcns_inum(void *vp)
+{
+ struct ipc_namespace *ns = vp;
+
+ return ns->proc_inum;
+}
+
const struct proc_ns_operations ipcns_operations = {
.name = "ipc",
.type = CLONE_NEWIPC,
.get = ipcns_get,
.put = ipcns_put,
.install = ipcns_install,
+ .inum = ipcns_inum,
};

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