From c313089fbe1df71b5406dd9d7e4d36361051c620 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 2 Sep 2020 23:13:00 +0200 Subject: avformat/dxa: Use av_rescale() for duration computation Fixes: signed integer overflow: 8224000000 * 1629552639 cannot be represented in type 'long' Fixes: 24908/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-4658478506049536 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/dxa.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavformat/dxa.c b/libavformat/dxa.c index 27fa6afb6a..909c5ba2ba 100644 --- a/libavformat/dxa.c +++ b/libavformat/dxa.c @@ -143,7 +143,7 @@ static int dxa_read_header(AVFormatContext *s) c->readvid = !c->has_sound; c->vidpos = avio_tell(pb); s->start_time = 0; - s->duration = (int64_t)c->frames * AV_TIME_BASE * num / den; + s->duration = av_rescale(c->frames, AV_TIME_BASE * (int64_t)num, den); av_log(s, AV_LOG_DEBUG, "%d frame(s)\n",c->frames); return 0; -- cgit v1.2.3