From e849eb23432e45d0a1fda3901bb84eff0ce91282 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Tue, 26 Mar 2024 00:57:33 +0100 Subject: [PATCH] avformat/matroskadec: Check timescale Fixes: 3.82046e+18 is outside the range of representable values of type 'unsigned int' Fixes: 62276/clusterfuzz-testcase-minimized-ffmpeg_dem_WEBM_DASH_MANIFEST_fuzzer-6381436594421760 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/matroskadec.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c index e724e50a8e..e37fcfa018 100644 --- a/libavformat/matroskadec.c +++ b/libavformat/matroskadec.c @@ -3195,6 +3195,10 @@ static int matroska_parse_tracks(AVFormatContext *s) track->time_scale); track->time_scale = 1.0; } + + if (matroska->time_scale * track->time_scale > UINT_MAX) + return AVERROR_INVALIDDATA; + avpriv_set_pts_info(st, 64, matroska->time_scale * track->time_scale, 1000 * 1000 * 1000); /* 64 bit pts in ns */