[FFmpeg-devel] [PATCH 2/7] avcodec/vp9dsp_template: Fix some overflows in iadst8_1d()

Michael Niedermayer michael at niedermayer.cc
Sat Oct 24 20:08:50 EEST 2020

On Mon, Oct 19, 2020 at 04:24:56PM +0200, Michael Niedermayer wrote:
> Fixes: signed integer overflow: 190587 * 11585 cannot be represented in type 'int'
> Fixes: 26407/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VP9_fuzzer-5086348408782848
> Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> ---
>  libavcodec/vp9dsp_template.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)

will apply

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Awnsering whenever a program halts or runs forever is
On a turing machine, in general impossible (turings halting problem).
On any real computer, always possible as a real computer has a finite number
of states N, and will either halt in less than N cycles or never halt.
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