[FFmpeg-cvslog] avcodec/intelh263dec: 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| [94a80e36d307a5fbd8f2df1fa0cf8699bfad0ac9] | committer: Michael Niedermayer

avcodec/intelh263dec: 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=94a80e36d307a5fbd8f2df1fa0cf8699bfad0ac9
---

 libavcodec/intelh263dec.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavcodec/intelh263dec.c b/libavcodec/intelh263dec.c
index e5462e7..a45560c 100644
--- a/libavcodec/intelh263dec.c
+++ b/libavcodec/intelh263dec.c
@@ -113,6 +113,8 @@ int ff_intel_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;
     }
     s->f_code = 1;