They can be different if the last keyframe failed to decode correctly. Fixes possible invalid reads in such a case.
Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind CC:[email protected] --- libavcodec/svq1dec.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/libavcodec/svq1dec.c b/libavcodec/svq1dec.c index d9e6f7e..156b960 100644 --- a/libavcodec/svq1dec.c +++ b/libavcodec/svq1dec.c @@ -689,7 +689,8 @@ static int svq1_decode_frame(AVCodecContext *avctx, void *data, } else { /* delta frame */ uint8_t *previous = s->prev->data[i]; - if (!previous) { + if (!previous || + s->prev->width != s->width || s->prev->height != s->height) { av_log(avctx, AV_LOG_ERROR, "Missing reference frame.\n"); result = AVERROR_INVALIDDATA; goto err; -- 1.7.10.4 _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
