[FFmpeg-cvslog] h264: prevent an out of array read in decode_nal_units()
Michael Niedermayer
git at videolan.org
Sun Sep 11 07:30:07 CEST 2011
ffmpeg | branch: master | Michael Niedermayer <michaelni at gmx.at> | Sun Sep 11 07:23:00 2011 +0200| [ea0ac11e52b9cf5264f3d4eb7543e760c2a5fbb4] | committer: Michael Niedermayer
h264: prevent an out of array read in decode_nal_units()
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ea0ac11e52b9cf5264f3d4eb7543e760c2a5fbb4
---
libavcodec/h264.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 958c859..0703c6b 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -3646,7 +3646,7 @@ static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size){
s->workaround_bugs |= FF_BUG_TRUNCATED;
if(!(s->workaround_bugs & FF_BUG_TRUNCATED)){
- while(ptr[dst_length - 1] == 0 && dst_length > 0)
+ while(dst_length > 0 && ptr[dst_length - 1] == 0)
dst_length--;
}
bit_length= !dst_length ? 0 : (8*dst_length - ff_h264_decode_rbsp_trailing(h, ptr + dst_length - 1));
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