avcodec/shorten: Sanity check nmeans
authorMichael Niedermayer <michael@niedermayer.cc>
Tue, 5 Jun 2018 11:03:48 +0000 (13:03 +0200)
committerMichael Niedermayer <michael@niedermayer.cc>
Sun, 17 Jun 2018 23:16:04 +0000 (01:16 +0200)
commit3f5bc91be324a555133e0509f73c4f46983dfed8
tree80acae9957b869447792ef3047c2ad5e780f2836
parent7598b161f4ee88219be41caff09c219c83282b8d
avcodec/shorten: Sanity check nmeans

Fixes: OOM
Fixes: 8195/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SHORTEN_fuzzer-5179785826271232

The reference software appears to use longs for 32bits and it uses int for nmeans
hinting that the intended maximum size was not 32bit.

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit d91a0b503d7a886587281bc1ee42476aa5e89f85)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
libavcodec/shorten.c