From 299a56c9006b2eb8807c3e3efefb91a78fe6b3b2 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Mon, 19 Apr 2021 13:30:17 +0200 Subject: [PATCH] avformat/mov: Limit nb_chapter_tracks to input size Fixes: Timeout (15k loop iterations instead of 400m) Fixes: 31368/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-6601583174483968 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavformat/mov.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavformat/mov.c b/libavformat/mov.c index f67bb2441f..3ee15ff3dc 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -4656,6 +4656,8 @@ static int mov_read_chap(MOVContext *c, AVIOContext *pb, MOVAtom atom) for (i = 0; i < num && !pb->eof_reached; i++) c->chapter_tracks[i] = avio_rb32(pb); + c->nb_chapter_tracks = i; + return 0; }