From dffb85a98271826f6b38835b3c38399704bca3c0 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 13 Jun 2014 17:12:00 +0200 Subject: [PATCH] avcodec/mpegvideo: check that linesize is not too small Note linesize is rounded up to at least a multiple of 8 Signed-off-by: Michael Niedermayer --- libavcodec/mpegvideo.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/libavcodec/mpegvideo.c b/libavcodec/mpegvideo.c index 1cef34ab0b..97f22d2dc0 100644 --- a/libavcodec/mpegvideo.c +++ b/libavcodec/mpegvideo.c @@ -434,6 +434,11 @@ static int frame_size_alloc(MpegEncContext *s, int linesize) { int alloc_size = FFALIGN(FFABS(linesize) + 64, 32); + if (linesize < 24) { + av_log(s->avctx, AV_LOG_ERROR, "Image too small, temporary buffers cannot function\n"); + return AVERROR_PATCHWELCOME; + } + // edge emu needs blocksize + filter length - 1 // (= 17x17 for halfpel / 21x21 for h264) // VC1 computes luma and chroma simultaneously and needs 19X19 + 9x9