[Mesa-dev] [RFC 1/3] i965: prepare_depthbuffer: fix segfault, rhbz#735794

[Alon Levy]

Also fixes a segfault immediatelly after in the same case, i.e.
srb->region is also NULL in the run of virtualbox described in
the bug report in the subject.

Signed-off-by: Alon Levy <alevy at redhat.com>
---
 src/mesa/drivers/dri/i965/brw_misc_state.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/brw_misc_state.c b/src/mesa/drivers/dri/i965/brw_misc_state.c
index f7e6e7c..479cf82 100644
--- a/src/mesa/drivers/dri/i965/brw_misc_state.c
+++ b/src/mesa/drivers/dri/i965/brw_misc_state.c
@@ -204,11 +204,11 @@ static void prepare_depthbuffer(struct brw_context *brw)
    struct intel_renderbuffer *drb = intel_get_renderbuffer(fb, BUFFER_DEPTH);
    struct intel_renderbuffer *srb = intel_get_renderbuffer(fb, BUFFER_STENCIL);
 
-   if (drb)
+   if (drb && drb->region)
       brw_add_validated_bo(brw, drb->region->buffer);
    if (drb && drb->hiz_region)
       brw_add_validated_bo(brw, drb->hiz_region->buffer);
-   if (srb)
+   if (srb && srb->region)
       brw_add_validated_bo(brw, srb->region->buffer);
 }
 
-- 
1.7.6.1