From: Michael Niedermayer <[email protected]> This fixes out of array writes
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer <[email protected]> --- libavcodec/vc1dec.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c index c63ccf1..689c3b9 100644 --- a/libavcodec/vc1dec.c +++ b/libavcodec/vc1dec.c @@ -5572,6 +5572,10 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data, mb_height = s->mb_height >> v->field_mode; for (i = 0; i <= n_slices; i++) { if (i > 0 && slices[i - 1].mby_start >= mb_height) { + if(v->field_mode <= 0) { + av_log(v->s.avctx, AV_LOG_ERROR, "invalid end_mb_y %d\n", slices[i - 1].mby_start); + continue; + } v->second_field = 1; v->blocks_off = s->mb_width * s->mb_height << 1; v->mb_off = s->mb_stride * s->mb_height >> 1; -- 1.7.4 _______________________________________________ libav-devel mailing list [email protected] https://lists.libav.org/mailman/listinfo/libav-devel
