[FFmpeg-cvslog] xvag: prevent overflow during block alignment calculation

[Andreas Cadhalpun]

ffmpeg | branch: master | Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com> | Fri Jan  6 20:31:26 2017 +0100| [cba4f0e97ecbbde7c71ec7a7ae3eb1469b34545b] | committer: Andreas Cadhalpun

xvag: prevent overflow during block alignment calculation

Reviewed-by: Michael Niedermayer <michael at niedermayer.cc>
Reviewed-by: Paul B Mahol <onemda at gmail.com>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=cba4f0e97ecbbde7c71ec7a7ae3eb1469b34545b
---

 libavformat/xvag.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavformat/xvag.c b/libavformat/xvag.c
index 5ef4fb0..22e4f1e 100644
--- a/libavformat/xvag.c
+++ b/libavformat/xvag.c
@@ -20,6 +20,7 @@
  */
 
 #include "libavutil/bswap.h"
+#include "libavcodec/internal.h"
 #include "avformat.h"
 #include "internal.h"
 
@@ -68,7 +69,7 @@ static int xvag_read_header(AVFormatContext *s)
 
     if (st->codecpar->sample_rate <= 0)
         return AVERROR_INVALIDDATA;
-    if (st->codecpar->channels <= 0)
+    if (st->codecpar->channels <= 0 || st->codecpar->channels > FF_SANE_NB_CHANNELS)
         return AVERROR_INVALIDDATA;
 
     switch (codec) {