From: Thomas Hellstrom <thellstrom@vmware.com>
Date: Wed, 13 Jan 2010 21:28:37 +0000 (+0100)
Subject: drm/vmwgfx: Fix an error path causing an oops.
X-Git-Tag: v2.6.33-rc6~27^2~19
X-Git-Url: https://bbs.cooldavid.org/git/?a=commitdiff_plain;h=50ec3b7c35fda131e92abc6f9d93a230b7e009eb;p=net-next-2.6.git

drm/vmwgfx: Fix an error path causing an oops.

An error happening before the snooper.image member had been set up
would cause a kfree of an arbitrary pointer. Set up the snooper.image
member early.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
index c012d5927f6..125c2f44f98 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_resource.c
@@ -599,6 +599,27 @@ int vmw_surface_define_ioctl(struct drm_device *dev, void *data,
 	if (unlikely(ret != 0))
 		goto out_err1;
 
+
+	if (srf->flags & (1 << 9) &&
+	    srf->num_sizes == 1 &&
+	    srf->sizes[0].width == 64 &&
+	    srf->sizes[0].height == 64 &&
+	    srf->format == SVGA3D_A8R8G8B8) {
+
+		srf->snooper.image = kmalloc(64 * 64 * 4, GFP_KERNEL);
+		/* clear the image */
+		if (srf->snooper.image) {
+			memset(srf->snooper.image, 0x00, 64 * 64 * 4);
+		} else {
+			DRM_ERROR("Failed to allocate cursor_image\n");
+			ret = -ENOMEM;
+			goto out_err1;
+		}
+	} else {
+		srf->snooper.image = NULL;
+	}
+	srf->snooper.crtc = NULL;
+
 	user_srf->base.shareable = false;
 	user_srf->base.tfile = NULL;
 
@@ -622,24 +643,6 @@ int vmw_surface_define_ioctl(struct drm_device *dev, void *data,
 		return ret;
 	}
 
-	if (srf->flags & (1 << 9) &&
-	    srf->num_sizes == 1 &&
-	    srf->sizes[0].width == 64 &&
-	    srf->sizes[0].height == 64 &&
-	    srf->format == SVGA3D_A8R8G8B8) {
-
-		srf->snooper.image = kmalloc(64 * 64 * 4, GFP_KERNEL);
-		/* clear the image */
-		if (srf->snooper.image)
-			memset(srf->snooper.image, 0x00, 64 * 64 * 4);
-		else
-			DRM_ERROR("Failed to allocate cursor_image\n");
-
-	} else {
-		srf->snooper.image = NULL;
-	}
-	srf->snooper.crtc = NULL;
-
 	rep->sid = user_srf->base.hash.key;
 	if (rep->sid == SVGA3D_INVALID_ID)
 		DRM_ERROR("Created bad Surface ID.\n");