commit d9a6b2fd34665384b52225e8ec99a2d3070430f0
author Ruchi Kandoi <kandoiruchi@google.com> Tue Nov 10 10:53:55 2015 -0800
committer Ruchi Kandoi <kandoiruchi@google.com> Tue Nov 10 11:19:05 2015 -0800
tree c5151b8427488fae62734c626f14906d68cd2514
parent 52687d29b62f2ee22ee75a8304130391ad9f5226

wakeup: Add the guard condition for len in pm_get_active_wakeup_sources

Check if the len is not greater than maximum to prevent buffer overflow.

Signed-off-by: Ruchi Kandoi <kandoiruchi@google.com>
Change-Id: I575b0a72bb5448b68353408d71fa8b83420c9088

drivers/base/power/wakeup.c

diff --git a/drivers/base/power/wakeup.c b/drivers/base/power/wakeup.c
index ebe6c73..6cfdf97 100644
--- a/drivers/base/power/wakeup.c
+++ b/drivers/base/power/wakeup.c
@@ -688,7 +688,7 @@
 
 	rcu_read_lock();
 	list_for_each_entry_rcu(ws, &wakeup_sources, entry) {
-		if (ws->active) {
+		if (ws->active && len < max) {
 			if (!active)
 				len += scnprintf(pending_wakeup_source, max,
 						"Pending Wakeup Sources: ");