[FFmpeg-devel] [PATCH 3/3] avcodec/wavpack: Fix integer overflow in DEC_MED() / INC_MED()

Michael Niedermayer michael at niedermayer.cc
Sun Apr 29 17:43:31 EEST 2018

On Fri, Apr 27, 2018 at 09:44:07PM +0200, Michael Niedermayer wrote:
> Fixes: runtime error: signed integer overflow: 2147483637 + 128 cannot be represented in type 'int'
> Fixes: 6701/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WAVPACK_fuzzer-5358324934508544
> 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/wavpack.h | 4 ++--
>  1 file changed, 2 insertions(+), 2 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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