From 1ba8484559661dfdbca36dbc17b203f33f62e26c Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 31 May 2020 14:24:04 +0200 Subject: avformat/thp: Check compcount Fixes: out of array access Fixes: 22520/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5100297658826752 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/thp.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavformat/thp.c b/libavformat/thp.c index d3ae86c645..4abff1313a 100644 --- a/libavformat/thp.c +++ b/libavformat/thp.c @@ -93,6 +93,9 @@ static int thp_read_header(AVFormatContext *s) avio_seek (pb, thp->compoff, SEEK_SET); thp->compcount = avio_rb32(pb); + if (thp->compcount > FF_ARRAY_ELEMS(thp->components)) + return AVERROR_INVALIDDATA; + /* Read the list of component types. */ avio_read(pb, thp->components, 16); -- cgit v1.2.3