From ffc877215056e8f0feb1ff23ba7dc4c19277b94b Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 20 Mar 2022 23:13:16 +0100 Subject: [PATCH] avformat/asfdec_f: Check packet_frag_timestamp Fixes: signed integer overflow: -9223372036854775808 - 4607 cannot be represented in type 'long' Fixes: 45685/clusterfuzz-testcase-minimized-ffmpeg_IO_DEMUXER_fuzzer-5280102802391040 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/asfdec_f.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/libavformat/asfdec_f.c b/libavformat/asfdec_f.c index 4770a812db..7fc174635b 100644 --- a/libavformat/asfdec_f.c +++ b/libavformat/asfdec_f.c @@ -1217,10 +1217,12 @@ static int asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt) if ((ret = av_new_packet(&asf_st->pkt, asf_st->packet_obj_size)) < 0) return ret; asf_st->seq = asf->packet_seq; - if (asf->ts_is_pts) { - asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll; - } else - asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll; + if (asf->packet_frag_timestamp != AV_NOPTS_VALUE) { + if (asf->ts_is_pts) { + asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll; + } else + asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll; + } asf_st->pkt.stream_index = asf->stream_index; asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos; asf_st->pkt_clean = 0;