From 7c51d79ca7badfb370c410b8f44c9142b938e2e6 Mon Sep 17 00:00:00 2001
From: Vittorio Giovara <vittorio.giovara@gmail.com>
Date: Fri, 23 Jan 2015 15:03:08 +0000
Subject: [PATCH] nsvdec: validate channels and samplerate

Avoid a division by zero.

CC: libav-stable@libav.org
Bug-Id: CID 717749
---
 libavformat/nsvdec.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/nsvdec.c b/libavformat/nsvdec.c
index 670b8678c8..5662279f79 100644
--- a/libavformat/nsvdec.c
+++ b/libavformat/nsvdec.c
@@ -620,6 +620,8 @@ null_chunk_retry:
             bps = avio_r8(pb);
             channels = avio_r8(pb);
             samplerate = avio_rl16(pb);
+            if (!channels || !samplerate)
+                return AVERROR_INVALIDDATA;
             asize-=4;
             av_dlog(s, "NSV RAWAUDIO: bps %d, nchan %d, srate %d\n", bps, channels, samplerate);
             if (fill_header) {