From: Changyeon Lee <cyeon.lee@samsung.com>
Date: Mon, 19 Sep 2016 10:06:33 +0000 (+0900)
Subject: check null before access import/export(fd) backend interface
X-Git-Tag: accepted/tizen/common/20160920.131948~1
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=53f8e0877b522665e07edf4588e9e707cda1fdf0;p=platform%2Fcore%2Fuifw%2Flibtbm.git

check null before access import/export(fd) backend interface

Change-Id: I2d2b8a74b1713bfbf9a982436eed54e485dcc263
---

diff --git a/src/tbm_bufmgr.c b/src/tbm_bufmgr.c
index 0785ba1..54f1626 100644
--- a/src/tbm_bufmgr.c
+++ b/src/tbm_bufmgr.c
@@ -852,6 +852,9 @@ tbm_bo_import(tbm_bufmgr bufmgr, unsigned int key)
 
 	_tbm_util_check_bo_cnt(bufmgr);
 
+	if (!bufmgr->backend->bo_import)
+		return NULL;
+
 	pthread_mutex_lock(&bufmgr->lock);
 
 	bo = calloc(1, sizeof(struct _tbm_bo));
@@ -919,6 +922,9 @@ tbm_bo_import_fd(tbm_bufmgr bufmgr, tbm_fd fd)
 
 	_tbm_util_check_bo_cnt(bufmgr);
 
+	if (!bufmgr->backend->bo_import_fd)
+		return NULL;
+
 	pthread_mutex_lock(&bufmgr->lock);
 
 	bo = calloc(1, sizeof(struct _tbm_bo));
@@ -984,6 +990,9 @@ tbm_bo_export(tbm_bo bo)
 
 	bufmgr = bo->bufmgr;
 
+	if (!bufmgr->backend->bo_export)
+		return 0;
+
 	pthread_mutex_lock(&bufmgr->lock);
 
 	ret = bufmgr->backend->bo_export(bo);
@@ -1011,6 +1020,9 @@ tbm_bo_export_fd(tbm_bo bo)
 
 	bufmgr = bo->bufmgr;
 
+	if (!bufmgr->backend->bo_export_fd)
+		return -1;
+
 	pthread_mutex_lock(&bufmgr->lock);
 
 	ret = bufmgr->backend->bo_export_fd(bo);