From cedb4736f568a9cc693f81b1f7c33ea2499715ab Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 1 Oct 2023 00:00:28 +0200 Subject: avformat/asfdec_f: Saturate presentation time in marker Fixes: signed integer overflow: -9223372036315799520 - 3873890816 cannot be represented in type 'long' Fixes: 51896/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5009302746431488 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/asfdec_f.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavformat/asfdec_f.c b/libavformat/asfdec_f.c index 5405956467..a579c3e894 100644 --- a/libavformat/asfdec_f.c +++ b/libavformat/asfdec_f.c @@ -674,7 +674,7 @@ static int asf_read_marker(AVFormatContext *s) avio_rl64(pb); // offset, 8 bytes pres_time = avio_rl64(pb); // presentation time - pres_time -= asf->hdr.preroll * 10000; + pres_time = av_sat_sub64(pres_time, asf->hdr.preroll * 10000); avio_rl16(pb); // entry length avio_rl32(pb); // send time avio_rl32(pb); // flags -- cgit v1.2.3