On 4/5/19, Michael Niedermayer <mich...@niedermayer.cc> wrote: > Fixes: negation of -2147483648 cannot be represented in type 'int'; cast to > an unsigned type to negate this value to itself > Fixes: > 13999/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AGM_fuzzer-5644405991538688 > > Found-by: continuous fuzzing process > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > --- > libavcodec/agm.c | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/libavcodec/agm.c b/libavcodec/agm.c > index 2d2092222d..cbd45e8095 100644 > --- a/libavcodec/agm.c > +++ b/libavcodec/agm.c > @@ -535,11 +535,13 @@ static int decode_frame(AVCodecContext *avctx, void > *data, > > s->flags = 0; > w = bytestream2_get_le32(gbyte); > + h = bytestream2_get_le32(gbyte); > + if (w == INT32_MIN || h == INT32_MIN) > + return AVERROR_INVALIDDATA; > if (w < 0) { > w = -w; > s->flags |= 2; > } > - h = bytestream2_get_le32(gbyte); > if (h < 0) { > h = -h; > s->flags |= 1; > --
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