From 86cbbd66cd12b162f006f2ea25e860eab6727204 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 4 Jul 2022 23:32:40 +0200 Subject: avformat/iff: simplify duration calculation Fixes: signed integer overflow: 315680096256 * 134215943 cannot be represented in type 'long long' Fixes: 48713/clusterfuzz-testcase-minimized-ffmpeg_dem_IFF_fuzzer-5886272312311808 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit 0740641e932551342cc1737d981e950ecffa3b63) Signed-off-by: Michael Niedermayer --- libavformat/iff.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/libavformat/iff.c b/libavformat/iff.c index e086c6d671..cf4d42ecab 100644 --- a/libavformat/iff.c +++ b/libavformat/iff.c @@ -385,7 +385,7 @@ static int read_dst_frame(AVFormatContext *s, AVPacket *pkt) avio_skip(pb, 1); pkt->flags |= AV_PKT_FLAG_KEY; pkt->stream_index = 0; - pkt->duration = 588LL * s->streams[0]->codecpar->sample_rate / 44100; + pkt->duration = s->streams[0]->codecpar->sample_rate / 75; pkt->pos = chunk_pos; chunk_pos = avio_tell(pb); @@ -398,7 +398,8 @@ static int read_dst_frame(AVFormatContext *s, AVPacket *pkt) case ID_FRTE: if (data_size < 4) return AVERROR_INVALIDDATA; - s->streams[0]->duration = avio_rb32(pb) * 588LL * s->streams[0]->codecpar->sample_rate / 44100; + s->streams[0]->duration = avio_rb32(pb) * (uint64_t)s->streams[0]->codecpar->sample_rate / 75; + break; } -- cgit v1.2.3