ffmpeg | branch: release/3.0 | Michael Niedermayer <mich...@niedermayer.cc> | Mon Feb 26 03:02:48 2018 +0100| [fbf690d79a611a8dd9df1bce4189e5bf9c05508a] | committer: Michael Niedermayer
avcodec/utvideodec: Check subsample factors Fixes: Out of array read Fixes: heap_poc Found-by: GwanYeong Kim <gy741....@gmail.com> Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> (cherry picked from commit 7414d0bda7763f9bd69c26c068e482ab297c1c96) Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fbf690d79a611a8dd9df1bce4189e5bf9c05508a --- libavcodec/utvideodec.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/libavcodec/utvideodec.c b/libavcodec/utvideodec.c index 760d9e5a7f..160528e007 100644 --- a/libavcodec/utvideodec.c +++ b/libavcodec/utvideodec.c @@ -28,6 +28,7 @@ #include <stdlib.h> #include "libavutil/intreadwrite.h" +#include "libavutil/pixdesc.h" #include "avcodec.h" #include "bswapdsp.h" #include "bytestream.h" @@ -474,6 +475,7 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, static av_cold int decode_init(AVCodecContext *avctx) { UtvideoContext * const c = avctx->priv_data; + int h_shift, v_shift; c->avctx = avctx; @@ -538,6 +540,13 @@ static av_cold int decode_init(AVCodecContext *avctx) return AVERROR_INVALIDDATA; } + av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &h_shift, &v_shift); + if ((avctx->width & ((1<<h_shift)-1)) || + (avctx->height & ((1<<v_shift)-1))) { + avpriv_request_sample(avctx, "Odd dimensions"); + return AVERROR_PATCHWELCOME; + } + return 0; } _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
