[FFmpeg-cvslog] avcodec/dvdsubenc: return error if canvas_size is too small for subtitle render
Limin Wang
git at videolan.org
Thu May 19 17:27:48 EEST 2022
ffmpeg | branch: master | Limin Wang <lance.lmwang at gmail.com> | Sun May 8 22:52:14 2022 +0800| [94968dbc1116e23cb658c09538e9bce52b63d654] | committer: Limin Wang
avcodec/dvdsubenc: return error if canvas_size is too small for subtitle render
Signed-off-by: Limin Wang <lance.lmwang at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=94968dbc1116e23cb658c09538e9bce52b63d654
---
libavcodec/dvdsubenc.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/libavcodec/dvdsubenc.c b/libavcodec/dvdsubenc.c
index fc3b7d1816..d29db7d49c 100644
--- a/libavcodec/dvdsubenc.c
+++ b/libavcodec/dvdsubenc.c
@@ -376,6 +376,12 @@ static int encode_dvd_subtitles(AVCodecContext *avctx,
x2 = vrect.x + vrect.w - 1;
y2 = vrect.y + vrect.h - 1;
+ if (x2 > avctx->width || y2 > avctx->height) {
+ av_log(avctx, AV_LOG_ERROR, "canvas_size(%d:%d) is too small(%d:%d) for render\n",
+ avctx->width, avctx->height, x2, y2);
+ ret = AVERROR(EINVAL);;
+ goto fail;
+ }
*q++ = 0x05;
// x1 x2 -> 6 nibbles
*q++ = vrect.x >> 4;
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