On Fri, May 26, 2017 at 03:20:14PM +0100, Rostislav Pehlivanov wrote: > On 26 May 2017 at 12:21, wm4 <[email protected]> wrote: > > > On Thu, 25 May 2017 16:10:49 +0200 > > Michael Niedermayer <[email protected]> wrote: > > > > > Fixes: 1735/clusterfuzz-testcase-minimized-5350472347025408 > > > > > > Found-by: continuous fuzzing process https://github.com/google/oss- > > fuzz/tree/master/projects/ffmpeg > > > Signed-off-by: Michael Niedermayer <[email protected]> > > > --- > > > libavcodec/fft_template.c | 50 +++++++++++++++++++++++------- > > ----------------- > > > 1 file changed, 25 insertions(+), 25 deletions(-) > > > > > > diff --git a/libavcodec/fft_template.c b/libavcodec/fft_template.c > > > index 480557f49f..e3a37e5d69 100644 > > > --- a/libavcodec/fft_template.c > > > +++ b/libavcodec/fft_template.c > > > @@ -249,7 +249,7 @@ static void fft_calc_c(FFTContext *s, FFTComplex *z) > > { > > > > > > int nbits, i, n, num_transforms, offset, step; > > > int n4, n2, n34; > > > - FFTSample tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7, tmp8; > > > + SUINT tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7, tmp8; > > > > I want this SUINT thing gone, not have more of it. > > _______________________________________________ > > ffmpeg-devel mailing list > > [email protected] > > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > > > I agree, especially here.
> Overflows should be left to happen in transforms if the input is corrupt. signed int overflow is not allowed in C, if that is what you meant. > Codecs are designed such that transforms won't overflow unless corrupt data > is fed. We allow for that to happen already (in the VP9 DCTs), so FFTs > shouldn't be excluded. > _______________________________________________ > ffmpeg-devel mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Modern terrorism, a quick summary: Need oil, start war with country that has oil, kill hundread thousand in war. Let country fall into chaos, be surprised about raise of fundamantalists. Drop more bombs, kill more people, be surprised about them taking revenge and drop even more bombs and strip your own citizens of their rights and freedoms. to be continued
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