1 files changed, 6 insertions, 2 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index 06d759ab4c62..aa1076c5e4a9 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -1845,11 +1845,13 @@ static __latent_entropy struct task_struct *copy_process(
         */
         recalc_sigpending();
         if (signal_pending(current)) {
-                spin_unlock(&current->sighand->siglock);
-                write_unlock_irq(&tasklist_lock);
                 retval = -ERESTARTNOINTR;
                 goto bad_fork_cancel_cgroup;
         }
+        if (unlikely(!(ns_of_pid(pid)->nr_hashed & PIDNS_HASH_ADDING))) {
+                retval = -ENOMEM;
+                goto bad_fork_cancel_cgroup;
+        }
 
         if (likely(p->pid)) {
                 ptrace_init_task(p, (clone_flags & CLONE_PTRACE) || trace);
@@ -1907,6 +1909,8 @@ static __latent_entropy struct task_struct *copy_process(
         return p;
 
 bad_fork_cancel_cgroup:
+        spin_unlock(&current->sighand->siglock);
+        write_unlock_irq(&tasklist_lock);
         cgroup_cancel_fork(p);
 bad_fork_free_pid:
         cgroup_threadgroup_change_end(current);