From 59b4e7cbd87889c0bac710ac7f62782b637419a1 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 4 Dec 2021 20:11:35 +0100 Subject: [PATCH] avformat/mov: Check for EOF in mov_read_glbl() Fixes: Infinite loop Fixes: 41351/clusterfuzz-testcase-minimized-ffmpeg_dem_MOV_fuzzer-5433895854669824 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 5c74d099da..bf9e58197b 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -1930,6 +1930,8 @@ static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom) // wrap a whole fiel atom inside of a glbl atom. unsigned size = avio_rb32(pb); unsigned type = avio_rl32(pb); + if (avio_feof(pb)) + return AVERROR_INVALIDDATA; avio_seek(pb, -8, SEEK_CUR); if (type == MKTAG('f','i','e','l') && size == atom.size) return mov_read_default(c, pb, atom);