From: Michael Niedermayer <michaelni@gmx.at>
Date: Thu, 4 Jun 2015 20:59:34 +0000 (+0200)
Subject: avcodec/alsdec: Check for overread
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=c2657633187e325a439e3297fd9ccd0522ab2e39;p=ffmpeg

avcodec/alsdec: Check for overread

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---

diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c
index 75be55cc1ed..b7d147d681f 100644
--- a/libavcodec/alsdec.c
+++ b/libavcodec/alsdec.c
@@ -1493,6 +1493,11 @@ static int read_frame_data(ALSDecContext *ctx, unsigned int ra_frame)
 
     // TODO: read_diff_float_data
 
+    if (get_bits_left(gb) < 0) {
+        av_log(ctx->avctx, AV_LOG_ERROR, "Overread %d\n", -get_bits_left(gb));
+        return AVERROR_INVALIDDATA;
+    }
+
     return 0;
 }