From e01f478dd25ec64cce5064de361881e60c9db651 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Tue, 20 Mar 2012 00:29:34 +0100 Subject: [PATCH] ffv1enc: Check context_model Fixes crash Found-by: durandal_1707 Signed-off-by: Michael Niedermayer --- libavcodec/ffv1.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavcodec/ffv1.c b/libavcodec/ffv1.c index fb9b03041b..95beddf283 100644 --- a/libavcodec/ffv1.c +++ b/libavcodec/ffv1.c @@ -936,6 +936,10 @@ static av_cold int encode_init(AVCodecContext *avctx) if (s->transparency) { av_log(avctx, AV_LOG_WARNING, "Storing alpha plane, this will require a recent FFV1 decoder to playback!\n"); } + if (avctx->context_model > 1U) { + av_log(avctx, AV_LOG_ERROR, "Invalid context model %d, valid values are 0 and 1\n", avctx->context_model); + return AVERROR(EINVAL); + } for(i=0; i<256; i++){ s->quant_table_count=2;