From 7a02b364b68c0bf7f065f5c217fae458f0efdb8d Mon Sep 17 00:00:00 2001
From: James Almer <jamrial@gmail.com>
Date: Tue, 31 Oct 2017 20:29:53 -0300
Subject: [PATCH] avcodec/vp9_superframe_bsf: cache packets by creating new
 references rather than moving them

Should hopefully fix the invalid reads after free introduced in
e1bc3f4396ade6033787717d3650fb62663eae8 for all targets.

Signed-off-by: James Almer <jamrial@gmail.com>
---
 libavcodec/vp9_superframe_bsf.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libavcodec/vp9_superframe_bsf.c b/libavcodec/vp9_superframe_bsf.c
index dea2cc232f..ceead5559c 100644
--- a/libavcodec/vp9_superframe_bsf.c
+++ b/libavcodec/vp9_superframe_bsf.c
@@ -147,7 +147,9 @@ static int vp9_superframe_filter(AVBSFContext *ctx, AVPacket *out)
         goto done;
     }
 
-    av_packet_move_ref(s->cache[s->n_cache++], in);
+    res = av_packet_ref(s->cache[s->n_cache++], in);
+    if (res < 0)
+        goto done;
 
     if (invisible) {
         res = AVERROR(EAGAIN);