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-rw-r--r--gnu/packages/patches/libvpx-use-after-free-in-postproc.patch34
1 files changed, 34 insertions, 0 deletions
diff --git a/gnu/packages/patches/libvpx-use-after-free-in-postproc.patch b/gnu/packages/patches/libvpx-use-after-free-in-postproc.patch
new file mode 100644
index 0000000000..04f2a953b7
--- /dev/null
+++ b/gnu/packages/patches/libvpx-use-after-free-in-postproc.patch
@@ -0,0 +1,34 @@
+From 52add5896661d186dec284ed646a4b33b607d2c7 Mon Sep 17 00:00:00 2001
+From: Jerome Jiang <jianj@google.com>
+Date: Wed, 23 May 2018 15:43:00 -0700
+Subject: [PATCH] VP8: Fix use-after-free in postproc.
+
+The pointer in vp8 postproc refers to show_frame_mi which is only
+updated on show frame. However, when there is a no-show frame which also
+changes the size (thus new frame buffers allocated), show_frame_mi is
+not updated with new frame buffer memory.
+
+Change the pointer in postproc to mi which is always updated.
+
+Bug: 842265
+Change-Id: I33874f2112b39f74562cba528432b5f239e6a7bd
+---
+ vp8/common/postproc.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/vp8/common/postproc.c b/vp8/common/postproc.c
+index d67ee8a57..8c292d616 100644
+--- a/vp8/common/postproc.c
++++ b/vp8/common/postproc.c
+@@ -65,7 +65,7 @@ void vp8_deblock(VP8_COMMON *cm, YV12_BUFFER_CONFIG *source,
+ double level = 6.0e-05 * q * q * q - .0067 * q * q + .306 * q + .0065;
+ int ppl = (int)(level + .5);
+
+- const MODE_INFO *mode_info_context = cm->show_frame_mi;
++ const MODE_INFO *mode_info_context = cm->mi;
+ int mbr, mbc;
+
+ /* The pixel thresholds are adjusted according to if or not the macroblock
+--
+2.19.0
+