"case 0" in free_pid() assumes that disable_pid_allocation() should
clear PIDNS_HASH_ADDING before the last pid goes away. However this
doesn't happen if the 1st fork() fails to create the child reaper
which should call disable_pid_allocation().
Signed-off-by: Oleg Nesterov <o...@redhat.com>
---
kernel/pid.c | 5 +++++
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/kernel/pid.c b/kernel/pid.c
index 66505c1..606a212 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -272,6 +272,11 @@ 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;
--
1.5.5.1
--
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