On Sat, Apr 10, 2021 at 07:38:36PM -0300, James Almer wrote: > On 4/10/2021 7:24 PM, Michael Niedermayer wrote: > > Fixes: left shift of negative value -224 > > Fixes: > > 32144/clusterfuzz-testcase-minimized-ffmpeg_dem_MVI_fuzzer-4971479323246592 > > > > Found-by: continuous fuzzing process > > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > > --- > > libavformat/mvi.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/libavformat/mvi.c b/libavformat/mvi.c > > index cfdbe5d273..10bf24408f 100644 > > --- a/libavformat/mvi.c > > +++ b/libavformat/mvi.c > > @@ -73,7 +73,7 @@ static int read_header(AVFormatContext *s) > > avio_rl16(pb); > > avio_r8(pb); > > - if (frames_count == 0 || mvi->audio_data_size == 0) > > + if (frames_count == 0 || (int)mvi->audio_data_size <= 0) > > Make audio_data_size an int in MviDemuxContext instead of casting it here. > Also, you could remove it from the context altogether, since it's only used > in read_header().
will apply with these changes thx [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Why not whip the teacher when the pupil misbehaves? -- Diogenes of Sinope
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