From: Chia-I Wu <olv@lunarg.com>
Date: Thu, 9 Sep 2010 16:02:47 +0000 (+0800)
Subject: egl: Display may be NULL in _eglLookup*.
X-Git-Tag: 062012170305~9722
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=08a482e7a9d13db5d4e6fd974942f6699d7d49dc;p=profile%2Fivi%2Fmesa.git

egl: Display may be NULL in _eglLookup*.

This fixes several NULL dereferences.
---

diff --git a/src/egl/main/eglconfig.h b/src/egl/main/eglconfig.h
index ca63c40..0ad58cf 100644
--- a/src/egl/main/eglconfig.h
+++ b/src/egl/main/eglconfig.h
@@ -117,7 +117,7 @@ static INLINE _EGLConfig *
 _eglLookupConfig(EGLConfig config, _EGLDisplay *dpy)
 {
    _EGLConfig *conf = (_EGLConfig *) config;
-   if (!_eglCheckConfigHandle(config, dpy))
+   if (!dpy || !_eglCheckConfigHandle(config, dpy))
       conf = NULL;
    return conf;
 }
diff --git a/src/egl/main/eglmode.c b/src/egl/main/eglmode.c
index 37594cd..ed107d5 100644
--- a/src/egl/main/eglmode.c
+++ b/src/egl/main/eglmode.c
@@ -25,7 +25,7 @@ _eglLookupMode(EGLModeMESA mode, _EGLDisplay *disp)
 {
    EGLint scrnum;
 
-   if (!disp->Screens)
+   if (!disp || !disp->Screens)
       return NULL;
 
    /* loop over all screens on the display */
diff --git a/src/egl/main/eglscreen.c b/src/egl/main/eglscreen.c
index 8b8966f..9e39335 100644
--- a/src/egl/main/eglscreen.c
+++ b/src/egl/main/eglscreen.c
@@ -69,7 +69,7 @@ _eglLookupScreen(EGLScreenMESA screen, _EGLDisplay *display)
 {
    EGLint i;
 
-   if (!display->Screens)
+   if (!display || !display->Screens)
       return NULL;
 
    for (i = 0; i < display->Screens->Size; i++) {