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53 lines
1.9 KiB
Diff
53 lines
1.9 KiB
Diff
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From 89e796aef5ca1b35ca4ff6fce9231b4125e07037 Mon Sep 17 00:00:00 2001
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From: Dylan Noblesmith <nobled@dreamwidth.org>
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Date: Fri, 16 Mar 2012 18:38:49 +0000
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Subject: [PATCH] intel: fix null dereference processing HiZ buffer
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Or technically, a near-null dereference.
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https://bugs.freedesktop.org/show_bug.cgi?id=46303
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https://bugs.freedesktop.org/show_bug.cgi?id=46739
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NOTE: This is a candidate for the 8.0 branch.
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Reviewed-by: Chad Versace <chad.versace@linux.intel.com>
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(cherry picked from commit 8d9decb75f0df564abaf9888d9fc5c77de8059cd)
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---
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src/mesa/drivers/dri/intel/intel_context.c | 6 ++++++
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1 files changed, 6 insertions(+), 0 deletions(-)
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diff --git a/src/mesa/drivers/dri/intel/intel_context.c b/src/mesa/drivers/dri/intel/intel_context.c
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index d3c0d70..9cdd804 100644
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--- a/src/mesa/drivers/dri/intel/intel_context.c
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+++ b/src/mesa/drivers/dri/intel/intel_context.c
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@@ -1225,6 +1225,10 @@ intel_process_dri2_buffer_with_separate_stencil(struct intel_context *intel,
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if (!rb)
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return;
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+ /* Check if we failed to allocate the depth miptree earlier. */
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+ if (buffer->attachment == __DRI_BUFFER_HIZ && rb->mt == NULL)
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+ return;
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+
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/* If the renderbuffer's and DRIbuffer's regions match, then continue. */
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if ((buffer->attachment != __DRI_BUFFER_HIZ &&
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rb->mt &&
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@@ -1266,6 +1270,7 @@ intel_process_dri2_buffer_with_separate_stencil(struct intel_context *intel,
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* due to failure to allocate new storage.
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*/
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if (buffer->attachment == __DRI_BUFFER_HIZ) {
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+ assert(rb->mt);
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intel_miptree_release(&rb->mt->hiz_mt);
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} else {
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intel_miptree_release(&rb->mt);
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@@ -1291,6 +1296,7 @@ intel_process_dri2_buffer_with_separate_stencil(struct intel_context *intel,
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/* Associate buffer with new storage. */
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if (buffer->attachment == __DRI_BUFFER_HIZ) {
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+ assert(rb->mt);
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rb->mt->hiz_mt = mt;
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} else {
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rb->mt = mt;
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--
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1.7.7.6
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