296 static void put_nsset(struct nsset *nsset)  in put_nsset()  argument
298 	unsigned flags = nsset->flags;  in put_nsset()
301 		put_cred(nsset_cred(nsset));  in put_nsset()
306 	if (nsset->fs && (flags & CLONE_NEWNS) && (flags & ~CLONE_NEWNS))  in put_nsset()
307 		free_fs_struct(nsset->fs);  in put_nsset()
308 	if (nsset->nsproxy)  in put_nsset()
309 		free_nsproxy(nsset->nsproxy);  in put_nsset()
312 static int prepare_nsset(unsigned flags, struct nsset *nsset)  in prepare_nsset()  argument
316 	nsset->nsproxy = create_new_namespaces(0, me, current_user_ns(), me->fs);  in prepare_nsset()
317 	if (IS_ERR(nsset->nsproxy))  in prepare_nsset()
318 		return PTR_ERR(nsset->nsproxy);  in prepare_nsset()
321 		nsset->cred = prepare_creds();  in prepare_nsset()
323 		nsset->cred = current_cred();  in prepare_nsset()
324 	if (!nsset->cred)  in prepare_nsset()
329 		nsset->fs = me->fs;  in prepare_nsset()
331 		nsset->fs = copy_fs_struct(me->fs);  in prepare_nsset()
332 		if (!nsset->fs)  in prepare_nsset()
336 	nsset->flags = flags;  in prepare_nsset()
340 	put_nsset(nsset);  in prepare_nsset()
344 static inline int validate_ns(struct nsset *nsset, struct ns_common *ns)  in validate_ns()  argument
346 	return ns->ops->install(nsset, ns);  in validate_ns()
356 static int validate_nsset(struct nsset *nsset, struct pid *pid)  in validate_nsset()  argument
359 	unsigned flags = nsset->flags;  in validate_nsset()
414 		ret = validate_ns(nsset, &user_ns->ns);  in validate_nsset()
421 		ret = validate_ns(nsset, from_mnt_ns(nsp->mnt_ns));  in validate_nsset()
428 		ret = validate_ns(nsset, &nsp->uts_ns->ns);  in validate_nsset()
436 		ret = validate_ns(nsset, &nsp->ipc_ns->ns);  in validate_nsset()
444 		ret = validate_ns(nsset, &pid_ns->ns);  in validate_nsset()
452 		ret = validate_ns(nsset, &nsp->cgroup_ns->ns);  in validate_nsset()
460 		ret = validate_ns(nsset, &nsp->net_ns->ns);  in validate_nsset()
468 		ret = validate_ns(nsset, &nsp->time_ns->ns);  in validate_nsset()
493 static void commit_nsset(struct nsset *nsset)  in commit_nsset()  argument
495 	unsigned flags = nsset->flags;  in commit_nsset()
501 		commit_creds(nsset_cred(nsset));  in commit_nsset()
502 		nsset->cred = NULL;  in commit_nsset()
508 		set_fs_root(me->fs, &nsset->fs->root);  in commit_nsset()
509 		set_fs_pwd(me->fs, &nsset->fs->pwd);  in commit_nsset()
519 		timens_commit(me, nsset->nsproxy->time_ns);  in commit_nsset()
523 	switch_task_namespaces(me, nsset->nsproxy);  in commit_nsset()
524 	nsset->nsproxy = NULL;  in commit_nsset()
531 	struct nsset nsset = {};  in SYSCALL_DEFINE2()  local
551 	err = prepare_nsset(flags, &nsset);  in SYSCALL_DEFINE2()
556 		err = validate_ns(&nsset, ns);  in SYSCALL_DEFINE2()
558 		err = validate_nsset(&nsset, file->private_data);  in SYSCALL_DEFINE2()
560 		commit_nsset(&nsset);  in SYSCALL_DEFINE2()
563 	put_nsset(&nsset);  in SYSCALL_DEFINE2()