On Sun, Apr 28, 2019 at 12:37:12PM +0200, Paul B Mahol wrote: > On 4/28/19, Michael Niedermayer <mich...@niedermayer.cc> wrote: > > Fixes: Timeout (23sec -> 0.5sec) > > Fixes: > > 14329/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_LSCR_fuzzer-5679252923482112 > > > > Found-by: continuous fuzzing process > > https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > > Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > > --- > > libavcodec/pngdec.c | 2 ++ > > 1 file changed, 2 insertions(+) > > > > diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c > > index 6a681be29d..1dcde6cbc9 100644 > > --- a/libavcodec/pngdec.c > > +++ b/libavcodec/pngdec.c > > @@ -1541,6 +1541,8 @@ static int decode_frame_lscr(AVCodecContext *avctx, > > return ret; > > > > nb_blocks = bytestream2_get_le16(gb); > > + if (2 + nb_blocks * 12 > bytestream2_get_bytes_left(gb)) > > I prefer if this is not reversed.
of course, will unreverse and push as "if (bytestream2_get_bytes_left(gb) < 2 + nb_blocks * 12)" thanks [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB There will always be a question for which you do not know the correct answer.
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