ffmpeg | branch: master | Andreas Cadhalpun <andreas.cadhal...@googlemail.com> | Tue May 5 21:33:08 2015 +0200| [984f50deb2d48f6844d65e10991b996a6d29e87c] | committer: Michael Niedermayer
diracdec: prevent overflow in data_unit_size check buf_idx + data_unit_size can overflow, causing the '> buf_size' check to wrongly fail. This causes a segmentation fault. Signed-off-by: Andreas Cadhalpun <andreas.cadhal...@googlemail.com> Signed-off-by: Michael Niedermayer <michae...@gmx.at> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=984f50deb2d48f6844d65e10991b996a6d29e87c --- libavcodec/diracdec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/diracdec.c b/libavcodec/diracdec.c index 05e954b..0453a97 100644 --- a/libavcodec/diracdec.c +++ b/libavcodec/diracdec.c @@ -1937,8 +1937,8 @@ static int dirac_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, break; data_unit_size = AV_RB32(buf+buf_idx+5); - if (buf_idx + data_unit_size > buf_size || !data_unit_size) { - if(buf_idx + data_unit_size > buf_size) + if (data_unit_size > buf_size - buf_idx || !data_unit_size) { + if(data_unit_size > buf_size - buf_idx) av_log(s->avctx, AV_LOG_ERROR, "Data unit with size %d is larger than input buffer, discarding\n", data_unit_size); _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
