On Sun, Sep 27, 2020 at 10:20:52PM +0200, Michael Niedermayer wrote: > Fixes: Infinite loop > Fixes: > 25844/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5660803318153216 > > Found-by: continuous fuzzing process > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > --- > libavformat/iff.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/libavformat/iff.c b/libavformat/iff.c > index 7feb121cd0..04fe8be4eb 100644 > --- a/libavformat/iff.c > +++ b/libavformat/iff.c > @@ -449,6 +449,9 @@ static int iff_read_header(AVFormatContext *s) > data_size = iff->is_64bit ? avio_rb64(pb) : avio_rb32(pb); > orig_pos = avio_tell(pb); > > + if (data_size >= INT64_MAX) > + return AVERROR_INVALIDDATA; > + > switch(chunk_id) { > case ID_VHDR: > st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO; > -- > 2.17.1
ok -- Peter (A907 E02F A6E5 0CD2 34CD 20D2 6760 79C5 AC40 DD6B)
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