pidns: fix free_pid() to handle the first fork failure

[platform/adaptation/renesas_rcar/renesas_kernel.git] / kernel / pid.c

diff --git a/kernel/pid.c b/kernel/pid.c
index 66505c1..9b9a266 100644 (file)
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -265,6 +265,7 @@ void free_pid(struct pid *pid)
                struct pid_namespace *ns = upid->ns;
                hlist_del_rcu(&upid->pid_chain);
                switch(--ns->nr_hashed) {
+               case 2:
                case 1:
                        /* When all that is left in the pid namespace
                         * is the reaper wake up the reaper.  The reaper
@@ -272,6 +273,11 @@ void free_pid(struct pid *pid)
                         */
                        wake_up_process(ns->child_reaper);
                        break;
+               case PIDNS_HASH_ADDING:
+                       /* Handle a fork failure of the first process */
+                       WARN_ON(ns->child_reaper);
+                       ns->nr_hashed = 0;
+                       /* fall through */
                case 0:
                        schedule_work(&ns->proc_work);
                        break;