On Sat, Sep 17, 2022 at 11:15:56PM +0200, Michael Niedermayer wrote: > Fixes: signed integer overflow: 538976288 * 4 cannot be represented in type > 'int' > Fixes: > 50993/clusterfuzz-testcase-minimized-ffmpeg_dem_ICO_fuzzer-6690068904935424 > > Found-by: continuous fuzzing process > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > --- > libavformat/icodec.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/libavformat/icodec.c b/libavformat/icodec.c > index 290f658d0c0..85dab3bca0a 100644 > --- a/libavformat/icodec.c > +++ b/libavformat/icodec.c > @@ -196,6 +196,9 @@ static int read_packet(AVFormatContext *s, AVPacket *pkt) > AV_WL32(buf + 32, image->nb_pal); > } > > + if (image->nb_pal > INT_MAX / 4 - 14 - 40) > + return AVERROR_INVALIDDATA; > + > AV_WL32(buf - 4, 14 + 40 + image->nb_pal * 4); > AV_WL32(buf + 8, AV_RL32(buf + 8) / 2); > } > -- > 2.17.1
lgtm, please apply -- Peter (A907 E02F A6E5 0CD2 34CD 20D2 6760 79C5 AC40 DD6B)
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