X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=kernel%2Futsname.c;h=08b197e8c485e4cb79dcee37a1b578f45566ad68;hb=edea0d03ee5f0ae0051b6adb6681ebdf976b1ca4;hp=fdc619eb61ef7497fa7a841277cdfd6e874ecbe3;hpb=bcf58e725ddc45d31addbc6627d4f0edccc824c1;p=firefly-linux-kernel-4.4.55.git

diff --git a/kernel/utsname.c b/kernel/utsname.c
index fdc619eb61ef..08b197e8c485 100644
--- a/kernel/utsname.c
+++ b/kernel/utsname.c
@@ -36,11 +36,18 @@ static struct uts_namespace *clone_uts_ns(struct user_namespace *user_ns,
 					  struct uts_namespace *old_ns)
 {
 	struct uts_namespace *ns;
+	int err;
 
 	ns = create_uts_ns();
 	if (!ns)
 		return ERR_PTR(-ENOMEM);
 
+	err = proc_alloc_inum(&ns->proc_inum);
+	if (err) {
+		kfree(ns);
+		return ERR_PTR(err);
+	}
+
 	down_read(&uts_sem);
 	memcpy(&ns->name, &old_ns->name, sizeof(ns->name));
 	ns->user_ns = get_user_ns(user_ns);
@@ -77,6 +84,7 @@ void free_uts_ns(struct kref *kref)
 
 	ns = container_of(kref, struct uts_namespace, kref);
 	put_user_ns(ns->user_ns);
+	proc_free_inum(ns->proc_inum);
 	kfree(ns);
 }
 
@@ -105,7 +113,8 @@ static int utsns_install(struct nsproxy *nsproxy, void *new)
 {
 	struct uts_namespace *ns = new;
 
-	if (!ns_capable(ns->user_ns, CAP_SYS_ADMIN))
+	if (!ns_capable(ns->user_ns, CAP_SYS_ADMIN) ||
+	    !nsown_capable(CAP_SYS_ADMIN))
 		return -EPERM;
 
 	get_uts_ns(ns);
@@ -114,11 +123,18 @@ static int utsns_install(struct nsproxy *nsproxy, void *new)
 	return 0;
 }
 
+static unsigned int utsns_inum(void *vp)
+{
+	struct uts_namespace *ns = vp;
+
+	return ns->proc_inum;
+}
+
 const struct proc_ns_operations utsns_operations = {
 	.name		= "uts",
 	.type		= CLONE_NEWUTS,
 	.get		= utsns_get,
 	.put		= utsns_put,
 	.install	= utsns_install,
+	.inum		= utsns_inum,
 };
-