diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/pid_namespace.c | 14 | ||||
| -rw-r--r-- | kernel/user_namespace.c | 14 | ||||
| -rw-r--r-- | kernel/utsname.c | 15 |
3 files changed, 27 insertions, 16 deletions
diff --git a/kernel/pid_namespace.c b/kernel/pid_namespace.c index 99e27e5bf906..dd961ad86fbd 100644 --- a/kernel/pid_namespace.c +++ b/kernel/pid_namespace.c @@ -313,6 +313,11 @@ int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd) return 0; } +static inline struct pid_namespace *to_pid_ns(struct ns_common *ns) +{ + return container_of(ns, struct pid_namespace, ns); +} + static void *pidns_get(struct task_struct *task) { struct pid_namespace *ns; @@ -323,18 +328,18 @@ static void *pidns_get(struct task_struct *task) get_pid_ns(ns); rcu_read_unlock(); - return ns; + return ns ? &ns->ns : NULL; } static void pidns_put(void *ns) { - put_pid_ns(ns); + put_pid_ns(to_pid_ns(ns)); } static int pidns_install(struct nsproxy *nsproxy, void *ns) { struct pid_namespace *active = task_active_pid_ns(current); - struct pid_namespace *ancestor, *new = ns; + struct pid_namespace *ancestor, *new = to_pid_ns(ns); if (!ns_capable(new->user_ns, CAP_SYS_ADMIN) || !ns_capable(current_user_ns(), CAP_SYS_ADMIN)) @@ -364,8 +369,7 @@ static int pidns_install(struct nsproxy *nsproxy, void *ns) static unsigned int pidns_inum(void *ns) { - struct pid_namespace *pid_ns = ns; - return pid_ns->ns.inum; + return ((struct ns_common *)ns)->inum; } const struct proc_ns_operations pidns_operations = { diff --git a/kernel/user_namespace.c b/kernel/user_namespace.c index fde584082673..1ab2209228ff 100644 --- a/kernel/user_namespace.c +++ b/kernel/user_namespace.c @@ -841,6 +841,11 @@ static bool new_idmap_permitted(const struct file *file, return false; } +static inline struct user_namespace *to_user_ns(struct ns_common *ns) +{ + return container_of(ns, struct user_namespace, ns); +} + static void *userns_get(struct task_struct *task) { struct user_namespace *user_ns; @@ -849,17 +854,17 @@ static void *userns_get(struct task_struct *task) user_ns = get_user_ns(__task_cred(task)->user_ns); rcu_read_unlock(); - return user_ns; + return user_ns ? &user_ns->ns : NULL; } static void userns_put(void *ns) { - put_user_ns(ns); + put_user_ns(to_user_ns(ns)); } static int userns_install(struct nsproxy *nsproxy, void *ns) { - struct user_namespace *user_ns = ns; + struct user_namespace *user_ns = to_user_ns(ns); struct cred *cred; /* Don't allow gaining capabilities by reentering @@ -890,8 +895,7 @@ static int userns_install(struct nsproxy *nsproxy, void *ns) static unsigned int userns_inum(void *ns) { - struct user_namespace *user_ns = ns; - return user_ns->ns.inum; + return ((struct ns_common *)ns)->inum; } const struct proc_ns_operations userns_operations = { diff --git a/kernel/utsname.c b/kernel/utsname.c index b1cd00b828f2..1917f74be8ec 100644 --- a/kernel/utsname.c +++ b/kernel/utsname.c @@ -88,6 +88,11 @@ void free_uts_ns(struct kref *kref) kfree(ns); } +static inline struct uts_namespace *to_uts_ns(struct ns_common *ns) +{ + return container_of(ns, struct uts_namespace, ns); +} + static void *utsns_get(struct task_struct *task) { struct uts_namespace *ns = NULL; @@ -101,17 +106,17 @@ static void *utsns_get(struct task_struct *task) } task_unlock(task); - return ns; + return ns ? &ns->ns : NULL; } static void utsns_put(void *ns) { - put_uts_ns(ns); + put_uts_ns(to_uts_ns(ns)); } static int utsns_install(struct nsproxy *nsproxy, void *new) { - struct uts_namespace *ns = new; + struct uts_namespace *ns = to_uts_ns(new); if (!ns_capable(ns->user_ns, CAP_SYS_ADMIN) || !ns_capable(current_user_ns(), CAP_SYS_ADMIN)) @@ -125,9 +130,7 @@ static int utsns_install(struct nsproxy *nsproxy, void *new) static unsigned int utsns_inum(void *vp) { - struct uts_namespace *ns = vp; - - return ns->ns.inum; + return ((struct ns_common *)vp)->inum; } const struct proc_ns_operations utsns_operations = { |