From fdcb966f4a3c6f872891b8dd554e3652b9e02d4f Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 3 Mar 2021 10:49:03 +0100 Subject: avformat/dcstr: Check sample rate Fixes: signed integer overflow: -1300248894420254720 * 16 cannot be represented in type 'long' Fixes: 30879/clusterfuzz-testcase-minimized-ffmpeg_dem_DCSTR_fuzzer-5094464215449600 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Reviewed-by: Paul B Mahol Signed-off-by: Michael Niedermayer --- libavformat/dcstr.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavformat/dcstr.c b/libavformat/dcstr.c index 9041a86539..9ddccc7f2d 100644 --- a/libavformat/dcstr.c +++ b/libavformat/dcstr.c @@ -43,6 +43,8 @@ static int dcstr_read_header(AVFormatContext *s) st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; st->codecpar->channels = avio_rl32(s->pb); st->codecpar->sample_rate = avio_rl32(s->pb); + if (st->codecpar->sample_rate <= 0) + return AVERROR_INVALIDDATA; codec = avio_rl32(s->pb); align = avio_rl32(s->pb); avio_skip(s->pb, 4); -- cgit v1.2.3