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avcodec/apedec: Only clear the needed buffer space, instead of all

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Fixes: Timeout (15sec -> 0.4sec)
Fixes: 18396/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APE_fuzzer-5730080487112704

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-10-27 23:26:52 +01:00
parent e1c4ce4761
commit f17ea02001
1 changed files with 1 additions and 1 deletions
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libavcodec/apedec.c
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@ -1516,7 +1516,7 @@ static int ape_decode_frame(AVCodecContext *avctx, void *data,
av_fast_malloc(&s->decoded_buffer, &s->decoded_size, decoded_buffer_size);
if (!s->decoded_buffer)
return AVERROR(ENOMEM);
memset(s->decoded_buffer, 0, s->decoded_size);
memset(s->decoded_buffer, 0, decoded_buffer_size);
s->decoded[0] = s->decoded_buffer;
s->decoded[1] = s->decoded_buffer + FFALIGN(blockstodecode, 8);