From: Peter Hutterer <peter.hutterer@who-t.net>
Date: Wed, 26 Jun 2013 06:47:43 +0000 (+1000)
Subject: Don't crash peeking at a zero-sized queue
X-Git-Tag: libevdev-0.2~89
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=70c17eac019a3801f3e748d9366e5d2b4fbca9b8;p=platform%2Fupstream%2Flibevdev.git

Don't crash peeking at a zero-sized queue

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
---

diff --git a/libevdev/libevdev-int.h b/libevdev/libevdev-int.h
index 5d3502a..1a4f224 100644
--- a/libevdev/libevdev-int.h
+++ b/libevdev/libevdev-int.h
@@ -121,7 +121,7 @@ queue_pop(struct libevdev *dev, struct input_event *ev)
 static inline int
 queue_peek(struct libevdev *dev, size_t idx, struct input_event *ev)
 {
-	if (idx > dev->queue_next)
+	if (dev->queue_next == 0 || idx > dev->queue_next)
 		return 1;
 	*ev = dev->queue[idx];
 	return 0;