From 98a257c3235bdc18151534134148845728418248 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 9 Oct 2019 09:53:26 +0200 Subject: [PATCH] avcodec/aptx: Check the number of channels Fixes: store to null pointer of type 'uint32_t' (aka 'unsigned int') Fixes: 18021/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APTX_HD_fuzzer-5761738313564160 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/aptx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavcodec/aptx.c b/libavcodec/aptx.c index e3fb064a6d0..a2620a92125 100644 --- a/libavcodec/aptx.c +++ b/libavcodec/aptx.c @@ -989,6 +989,9 @@ static av_cold int aptx_init(AVCodecContext *avctx) AptXContext *s = avctx->priv_data; int chan, subband; + if (avctx->channels != 2) + return AVERROR_INVALIDDATA; + s->hd = avctx->codec->id == AV_CODEC_ID_APTX_HD; s->block_size = s->hd ? 6 : 4; -- 2.39.2