When EXA is enabled, X crashes when I start sugar because of a NULL pointer
dereference.
All of the other checks in this function first check that pMaskPicture is
non-NULL, but this one was left out.
Index: xf86-video-openchrome-0.2.903/src/via_accel.c
===================================================================
--- xf86-video-openchrome-0.2.903.orig/src/via_accel.c
+++ xf86-video-openchrome-0.2.903/src/via_accel.c
@@ -2069,7 +2069,7 @@ viaExaCheckComposite(int op, PicturePtr
pMaskPicture->pDrawable->height < VIA_MIN_COMPOSITE)
return FALSE;
- if (pMaskPicture->repeat != RepeatNormal)
+ if (pMaskPicture && pMaskPicture->repeat != RepeatNormal)
return FALSE;
if (pMaskPicture && pMaskPicture->componentAlpha) {
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