[FFmpeg-cvslog] avcodec/ituh263dec: make while get_bits loop more robust by checking bits left

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Wed Oct 30 14:23:30 2013 +0100| [810f9c5eaac277613cd855ae9b4b6e7977cda742] | committer: Michael Niedermayer

avcodec/ituh263dec: make while get_bits loop more robust by checking bits left

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

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=810f9c5eaac277613cd855ae9b4b6e7977cda742
---

 libavcodec/ituh263dec.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavcodec/ituh263dec.c b/libavcodec/ituh263dec.c
index 2cad21d..5fbf89f 100644
--- a/libavcodec/ituh263dec.c
+++ b/libavcodec/ituh263dec.c
@@ -1115,6 +1115,8 @@ int ff_h263_decode_picture_header(MpegEncContext *s)
     /* PEI */
     while (get_bits1(&s->gb) != 0) {
         skip_bits(&s->gb, 8);
+        if (get_bits_left(&s->gb) <= 0)
+            return AVERROR_INVALIDDATA;
     }
 
     if(s->h263_slice_structured){