pid.c (cc46c03397c1865a181f1a4f66d4645806e5a943) pid.c (63f818f46af9f8b3f17b9695501e8d08959feb60)
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Generic pidhash and scalable, time-bounded PID allocator
4 *
5 * (C) 2002-2003 Nadia Yvette Chambers, IBM
6 * (C) 2004 Nadia Yvette Chambers, Oracle
7 * (C) 2002-2004 Ingo Molnar, Red Hat
8 *

--- 130 unchanged lines hidden (view full) ---

139 * may be sleeping in zap_pid_ns_processes().
140 */
141 wake_up_process(ns->child_reaper);
142 break;
143 case PIDNS_ADDING:
144 /* Handle a fork failure of the first process */
145 WARN_ON(ns->child_reaper);
146 ns->pid_allocated = 0;
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Generic pidhash and scalable, time-bounded PID allocator
4 *
5 * (C) 2002-2003 Nadia Yvette Chambers, IBM
6 * (C) 2004 Nadia Yvette Chambers, Oracle
7 * (C) 2002-2004 Ingo Molnar, Red Hat
8 *

--- 130 unchanged lines hidden (view full) ---

139 * may be sleeping in zap_pid_ns_processes().
140 */
141 wake_up_process(ns->child_reaper);
142 break;
143 case PIDNS_ADDING:
144 /* Handle a fork failure of the first process */
145 WARN_ON(ns->child_reaper);
146 ns->pid_allocated = 0;
147 /* fall through */
148 case 0:
149 schedule_work(&ns->proc_work);
150 break;
151 }
152
153 idr_remove(&ns->idr, upid->nr);
154 }
155 spin_unlock_irqrestore(&pidmap_lock, flags);
156
157 call_rcu(&pid->rcu, delayed_put_pid);

--- 84 unchanged lines hidden (view full) ---

242 goto out_free;
243 }
244
245 pid->numbers[i].nr = nr;
246 pid->numbers[i].ns = tmp;
247 tmp = tmp->parent;
248 }
249
147 break;
148 }
149
150 idr_remove(&ns->idr, upid->nr);
151 }
152 spin_unlock_irqrestore(&pidmap_lock, flags);
153
154 call_rcu(&pid->rcu, delayed_put_pid);

--- 84 unchanged lines hidden (view full) ---

239 goto out_free;
240 }
241
242 pid->numbers[i].nr = nr;
243 pid->numbers[i].ns = tmp;
244 tmp = tmp->parent;
245 }
246
250 /*
251 * ENOMEM is not the most obvious choice especially for the case
252 * where the child subreaper has already exited and the pid
253 * namespace denies the creation of any new processes. But ENOMEM
254 * is what we have exposed to userspace for a long time and it is
255 * documented behavior for pid namespaces. So we can't easily
256 * change it even if there were an error code better suited.
257 */
258 retval = -ENOMEM;
259
260 if (unlikely(is_child_reaper(pid))) {
261 if (pid_ns_prepare_proc(ns))
262 goto out_free;
263 }
264
265 get_pid_ns(ns);
266 refcount_set(&pid->count, 1);
247 get_pid_ns(ns);
248 refcount_set(&pid->count, 1);
249 spin_lock_init(&pid->lock);
267 for (type = 0; type < PIDTYPE_MAX; ++type)
268 INIT_HLIST_HEAD(&pid->tasks[type]);
269
270 init_waitqueue_head(&pid->wait_pidfd);
250 for (type = 0; type < PIDTYPE_MAX; ++type)
251 INIT_HLIST_HEAD(&pid->tasks[type]);
252
253 init_waitqueue_head(&pid->wait_pidfd);
254 INIT_HLIST_HEAD(&pid->inodes);
271
272 upid = pid->numbers + ns->level;
273 spin_lock_irq(&pidmap_lock);
274 if (!(ns->pid_allocated & PIDNS_ADDING))
275 goto out_unlock;
276 for ( ; upid >= pid->numbers; --upid) {
277 /* Make the PID visible to find_pid_ns. */
278 idr_replace(&upid->ns->idr, pid, upid->nr);

--- 310 unchanged lines hidden (view full) ---

589 SLAB_HWCACHE_ALIGN | SLAB_PANIC | SLAB_ACCOUNT);
590}
591
592static struct file *__pidfd_fget(struct task_struct *task, int fd)
593{
594 struct file *file;
595 int ret;
596
255
256 upid = pid->numbers + ns->level;
257 spin_lock_irq(&pidmap_lock);
258 if (!(ns->pid_allocated & PIDNS_ADDING))
259 goto out_unlock;
260 for ( ; upid >= pid->numbers; --upid) {
261 /* Make the PID visible to find_pid_ns. */
262 idr_replace(&upid->ns->idr, pid, upid->nr);

--- 310 unchanged lines hidden (view full) ---

573 SLAB_HWCACHE_ALIGN | SLAB_PANIC | SLAB_ACCOUNT);
574}
575
576static struct file *__pidfd_fget(struct task_struct *task, int fd)
577{
578 struct file *file;
579 int ret;
580
597 ret = mutex_lock_killable(&task->signal->cred_guard_mutex);
581 ret = mutex_lock_killable(&task->signal->exec_update_mutex);
598 if (ret)
599 return ERR_PTR(ret);
600
601 if (ptrace_may_access(task, PTRACE_MODE_ATTACH_REALCREDS))
602 file = fget_task(task, fd);
603 else
604 file = ERR_PTR(-EPERM);
605
582 if (ret)
583 return ERR_PTR(ret);
584
585 if (ptrace_may_access(task, PTRACE_MODE_ATTACH_REALCREDS))
586 file = fget_task(task, fd);
587 else
588 file = ERR_PTR(-EPERM);
589
606 mutex_unlock(&task->signal->cred_guard_mutex);
590 mutex_unlock(&task->signal->exec_update_mutex);
607
608 return file ?: ERR_PTR(-EBADF);
609}
610
611static int pidfd_getfd(struct pid *pid, int fd)
612{
613 struct task_struct *task;
614 struct file *file;

--- 66 unchanged lines hidden --- 		591
592 return file ?: ERR_PTR(-EBADF);
593}
594
595static int pidfd_getfd(struct pid *pid, int fd)
596{
597 struct task_struct *task;
598 struct file *file;

--- 66 unchanged lines hidden ---