From f421ec23ada99f2fd0c3d77e23e4faa01155e2fd Mon Sep 17 00:00:00 2001
From: Benjamin Walsh <benjamin.walsh@windriver.com>
Date: Wed, 30 Nov 2016 17:41:16 -0500
Subject: [PATCH] kernel: fix race condition when spawning a thread with a
 delay

Interrupt must be locked before inserting a timeout in the timeout
queue.

Change-Id: Iab0bf01f393e66a6403d2f85e899dbf737da4afc
Signed-off-by: Benjamin Walsh <benjamin.walsh@windriver.com>
---
 kernel/unified/thread.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/unified/thread.c b/kernel/unified/thread.c
index b2a14259db6..6862a1a99e9 100644
--- a/kernel/unified/thread.c
+++ b/kernel/unified/thread.c
@@ -221,8 +221,10 @@ static void schedule_new_thread(struct k_thread *thread, int32_t delay)
 		start_thread(thread);
 	} else {
 		int32_t ticks = _TICK_ALIGN + _ms_to_ticks(delay);
+		int key = irq_lock();
 
 		_add_thread_timeout(thread, NULL, ticks);
+		irq_unlock(key);
 	}
 #else
 	ARG_UNUSED(delay);