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egl: extra null checks for get_xcb_screen() return values 

verify get_xcb_screen() returned pointer before using it.

Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
This commit is contained in:
Juha-Pekka Heikkila 2014-09-08 15:03:35 +03:00 committed by Tapani Pälli
parent b9463813ee
commit 4ed23fd590
1 changed files with 24 additions and 6 deletions
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30
src/egl/drivers/dri2/platform_x11.c
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@ -205,6 +205,7 @@ dri2_x11_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
xcb_screen_iterator_t s;
xcb_generic_error_t *error;
xcb_drawable_t drawable;
xcb_screen_t *screen;
STATIC_ASSERT(sizeof(uintptr_t) == sizeof(native_surface));
drawable = (uintptr_t) native_surface;
@ -222,11 +223,16 @@ dri2_x11_create_surface(_EGLDriver *drv, _EGLDisplay *disp, EGLint type,
dri2_surf->region = XCB_NONE;
if (type == EGL_PBUFFER_BIT) {
screen = get_xcb_screen(s, dri2_dpy->screen);
if (!screen) {
_eglError(EGL_BAD_NATIVE_WINDOW, "dri2_create_surface");
goto cleanup_surf;
}
dri2_surf->drawable = xcb_generate_id(dri2_dpy->conn);
s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
xcb_create_pixmap(dri2_dpy->conn, conf->BufferSize,
dri2_surf->drawable,
get_xcb_screen(s, dri2_dpy->screen)->root,
dri2_surf->drawable, screen->root,
dri2_surf->base.Width, dri2_surf->base.Height);
} else {
dri2_surf->drawable = drawable;
@ -504,6 +510,7 @@ dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
xcb_dri2_connect_cookie_t connect_cookie;
xcb_generic_error_t *error;
xcb_screen_iterator_t s;
xcb_screen_t *screen;
char *driver_name, *device_name;
const xcb_query_extension_reply_t *extension;
@ -527,8 +534,12 @@ dri2_x11_connect(struct dri2_egl_display *dri2_dpy)
XCB_DRI2_MINOR_VERSION);
s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn,
get_xcb_screen(s, dri2_dpy->screen)->root,
screen = get_xcb_screen(s, dri2_dpy->screen);
if (!screen) {
_eglError(EGL_BAD_NATIVE_WINDOW, "dri2_x11_connect");
return EGL_FALSE;
}
connect_cookie = xcb_dri2_connect_unchecked(dri2_dpy->conn, screen->root,
XCB_DRI2_DRIVER_TYPE_DRI);
xfixes_query =
@ -589,12 +600,19 @@ dri2_x11_authenticate(_EGLDisplay *disp, uint32_t id)
xcb_dri2_authenticate_reply_t *authenticate;
xcb_dri2_authenticate_cookie_t authenticate_cookie;
xcb_screen_iterator_t s;
xcb_screen_t *screen;
int ret = 0;
s = xcb_setup_roots_iterator(xcb_get_setup(dri2_dpy->conn));
screen = get_xcb_screen(s, dri2_dpy->screen);
if (!screen) {
_eglError(EGL_BAD_NATIVE_WINDOW, "dri2_x11_authenticate");
return -1;
}
authenticate_cookie =
xcb_dri2_authenticate_unchecked(dri2_dpy->conn,
get_xcb_screen(s, dri2_dpy->screen)->root, id);
xcb_dri2_authenticate_unchecked(dri2_dpy->conn, screen->root, id);
authenticate =
xcb_dri2_authenticate_reply(dri2_dpy->conn, authenticate_cookie, NULL);