[FFmpeg-cvslog] smacker: sanity check audio size.

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sat Nov 24 18:02:08 2012 +0100| [57c0da6fe4ebd7c2d58a28248d84a18d45fce0ee] | committer: Michael Niedermayer

smacker: sanity check audio size.

Fixes, excessive memory allocation
Fixes Ticket1892

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=57c0da6fe4ebd7c2d58a28248d84a18d45fce0ee
---

 libavcodec/smacker.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavcodec/smacker.c b/libavcodec/smacker.c
index f4cc6ae..dbcbbd5 100644
--- a/libavcodec/smacker.c
+++ b/libavcodec/smacker.c
@@ -608,6 +608,11 @@ static int smka_decode_frame(AVCodecContext *avctx, void *data,
 
     unp_size = AV_RL32(buf);
 
+    if (unp_size > (1U<<24)) {
+        av_log(avctx, AV_LOG_ERROR, "packet is too big\n");
+        return AVERROR_INVALIDDATA;
+    }
+
     init_get_bits(&gb, buf + 4, (buf_size - 4) * 8);
 
     if(!get_bits1(&gb)){