From d8a1eb11b72071ba88946191f8bc9701167d39a6 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Tue, 13 Nov 2012 01:12:26 +0100
Subject: wavpack: check the blocks sample count, fix out of array accesses

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
 libavcodec/wavpack.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavcodec/wavpack.c b/libavcodec/wavpack.c
index b36fa0a28e..bc038a9534 100644
--- a/libavcodec/wavpack.c
+++ b/libavcodec/wavpack.c
@@ -806,6 +806,10 @@ static int wavpack_decode_block(AVCodecContext *avctx, int block_no,
             *got_frame_ptr = 0;
             return 0;
         }
+        if (s->samples > wc->samples) {
+            av_log(avctx, AV_LOG_ERROR, "too many samples in block");
+            return -1;
+        }
     } else {
         s->samples = wc->samples;
     }
-- 
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