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avcodec/eatgv: Check remaining size after the keyframe header

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The minimal size which unpack() will not fail on is 5 bytes
Fixes: Timeout (14sec -> 77ms) (testcase 15508)
Fixes: 15508/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EATGV_fuzzer-5700053513011200
Fixes: 15996/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_EATGV_fuzzer-5751353223151616

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 009ec8dc33)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-07-28 21:09:14 +02:00
parent 8d2e23508f
commit 6b04a5dd2d
1 changed files with 3 additions and 0 deletions
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libavcodec/eatgv.c
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@ -300,6 +300,9 @@ static int tgv_decode_frame(AVCodecContext *avctx,
s->palette[i] = 0xFFU << 24 | AV_RB24(buf);
buf += 3;
}
if (buf_end - buf < 5) {
return AVERROR_INVALIDDATA;
}
}
if ((ret = ff_get_buffer(avctx, frame, AV_GET_BUFFER_FLAG_REF)) < 0)