From c78b2b138ce222de2f4cecac8fd4361f05ee9428 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Thu, 14 Jan 2021 18:38:16 +0100 Subject: avformat/ads: Check size Fixes: signed integer overflow: -2147483616 - 64 cannot be represented in type 'int' Fixes: 26910/clusterfuzz-testcase-minimized-ffmpeg_dem_ADS_fuzzer-6617769344892928 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/ads.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'libavformat/ads.c') diff --git a/libavformat/ads.c b/libavformat/ads.c index f25141b3c6..544d652829 100644 --- a/libavformat/ads.c +++ b/libavformat/ads.c @@ -34,8 +34,9 @@ static int ads_probe(const AVProbeData *p) static int ads_read_header(AVFormatContext *s) { - int align, codec, size; + int align, codec; AVStream *st; + int64_t size; st = avformat_new_stream(s, NULL); if (!st) @@ -62,7 +63,7 @@ static int ads_read_header(AVFormatContext *s) st->codecpar->block_align = st->codecpar->channels * align; avio_skip(s->pb, 12); size = avio_rl32(s->pb); - if (st->codecpar->codec_id == AV_CODEC_ID_ADPCM_PSX) + if (st->codecpar->codec_id == AV_CODEC_ID_ADPCM_PSX && size >= 0x40) st->duration = (size - 0x40) / 16 / st->codecpar->channels * 28; avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate); -- cgit v1.2.3