1 files changed, 18 insertions, 0 deletions

diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
index 77262009f89d..7b5ad9a5a6b6 100644
--- a/drivers/base/power/wakeup.c
+++ b/drivers/base/power/wakeup.c
@@ -351,6 +351,20 @@ int device_set_wakeup_enable(struct device *dev, bool enable)
 }
 EXPORT_SYMBOL_GPL(device_set_wakeup_enable);
 
+/**
+ * wakeup_source_not_registered - validate the given wakeup source.
+ * @ws: Wakeup source to be validated.
+ */
+static bool wakeup_source_not_registered(struct wakeup_source *ws)
+{
+        /*
+         * Use timer struct to check if the given source is initialized
+         * by wakeup_source_add.
+         */
+        return ws->timer.function != pm_wakeup_timer_fn ||
+                   ws->timer.data != (unsigned long)ws;
+}
+
 /*
  * The functions below use the observation that each wakeup event starts a
  * period in which the system should not be suspended.  The moment this period
@@ -391,6 +405,10 @@ static void wakeup_source_activate(struct wakeup_source *ws)
 {
         unsigned int cec;
 
+        if (WARN_ONCE(wakeup_source_not_registered(ws),
+                        "unregistered wakeup source\n"))
+                return;
+
         /*
          * active wakeup source should bring the system
          * out of PM_SUSPEND_FREEZE state