[FFmpeg-cvslog] riffdec: prevent negative bit rate

[Andreas Cadhalpun]

ffmpeg | branch: release/2.7 | Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com> | Sat Jul 11 00:09:46 2015 +0200| [65dc698607388f5bea72a1b249d8bf05a5e8b14a] | committer: Andreas Cadhalpun

riffdec: prevent negative bit rate

Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit 189420cb561929e05f5cc4224cdca83740a24a32)
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=65dc698607388f5bea72a1b249d8bf05a5e8b14a
---

 libavformat/riffdec.c |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/libavformat/riffdec.c b/libavformat/riffdec.c
index 4afe807..632c58c 100644
--- a/libavformat/riffdec.c
+++ b/libavformat/riffdec.c
@@ -103,6 +103,14 @@ int ff_get_wav_header(AVFormatContext *s, AVIOContext *pb,
         codec->bit_rate    = avio_rb32(pb) * 8;
         codec->block_align = avio_rb16(pb);
     }
+    if (codec->bit_rate < 0) {
+        av_log(s, AV_LOG_WARNING,
+               "Invalid bit rate: %d\n", codec->bit_rate);
+        if (s->error_recognition & AV_EF_EXPLODE)
+            return AVERROR_INVALIDDATA;
+        else
+            codec->bit_rate = 0;
+    }
     if (size == 14) {  /* We're dealing with plain vanilla WAVEFORMAT */
         codec->bits_per_coded_sample = 8;
     } else {