From ba2e82d138eecb451c3d0bf53d9c349fb560f039 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Mon, 31 Mar 2008 10:55:39 +0100
Subject: [PATCH] [cairo-ps-surface] Check error status before potential
 illegal dereference.

After acquiring the source image, check for the error status to ensure
that we do not attempt to deference an invalid surface.
---
 src/cairo-ps-surface.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/cairo-ps-surface.c b/src/cairo-ps-surface.c
index 1ae2158c8..a197ff969 100644
--- a/src/cairo-ps-surface.c
+++ b/src/cairo-ps-surface.c
@@ -2142,17 +2142,23 @@ _cairo_ps_surface_acquire_surface (cairo_ps_surface_t      *surface,
 	cairo_rectangle_int_t pattern_extents;
 
 	status = _cairo_surface_get_extents (meta_surface, &pattern_extents);
+	if (status)
+	    return status;
+
 	*width = pattern_extents.width;
 	*height = pattern_extents.height;
     } else {
 	status = _cairo_surface_acquire_source_image (pattern->surface,
 						      &surface->image,
 						      &surface->image_extra);
+	if (status)
+	    return status;
+
 	*width = surface->image->width;
 	*height = surface->image->height;
     }
 
-    return status;
+    return CAIRO_STATUS_SUCCESS;
 }
 
 static cairo_status_t