From: SeokYeon Hwang <syeon.hwang@samsung.com>
Date: Tue, 23 Aug 2016 06:38:51 +0000 (+0900)
Subject: input: fix null pointer dereference before device realizing
X-Git-Tag: Tizen_Studio_1.3_Release_p2.3.2~27^2~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=943131895499f7f0040be0d94772f42d339de3f3;p=sdk%2Femulator%2Fqemu.git

input: fix null pointer dereference before device realizing

Change-Id: Ic988464da57ab65509eb28ea53effd23c1e54d73
Signed-off-by: SeokYeon Hwang <syeon.hwang@samsung.com>
---

diff --git a/tizen/src/hw/virtio/maru_virtio_input.c b/tizen/src/hw/virtio/maru_virtio_input.c
index 78775e7878..bf72295709 100644
--- a/tizen/src/hw/virtio/maru_virtio_input.c
+++ b/tizen/src/hw/virtio/maru_virtio_input.c
@@ -162,6 +162,11 @@ static void input_common_reset(VirtIODevice *vdev)
 
 static bool check_ready(VirtIOMaruInput *input)
 {
+    if (!input) {
+        // device is not realized yet.
+        return false;
+    }
+
     if (unlikely(!virtio_queue_ready(input->vq))) {
         LOG_INFO("virtqueue is not ready, dropping event.\n");
         return false;
@@ -420,11 +425,11 @@ static void virtio_keyboard_device_unrealize(DeviceState *dev, Error **errp)
 
 static void virtio_keyboard_device_reset(VirtIODevice *vdev)
 {
-    VirtIOKeyboard *vkbd = (VirtIOKeyboard *)vdev;
+    VirtIOKeyboard *kbd = (VirtIOKeyboard *)vdev;
 
     LOG_INFO("%s\n", __func__);
 
-    vkbd->extension_key = 0;
+    kbd->extension_key = 0;
     input_common_reset(vdev);
 }