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avcodec/loco: Check for end of input in the first line

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Fixes: Timeout (85sec -> 0.1sec)
Fixes: 17634/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_LOCO_fuzzer-5666410809786368

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 2019-09-25 21:48:26 +02:00
parent 2acbbe2623
commit c5a52eb5cd
1 changed files with 2 additions and 0 deletions
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libavcodec/loco.c
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@ -155,6 +155,8 @@ static int loco_decode_plane(LOCOContext *l, uint8_t *data, int width, int heigh
/* restore top line */
for (i = 1; i < width; i++) {
val = loco_get_rice(&rc);
if (val == INT_MIN)
return AVERROR_INVALIDDATA;
data[i] = data[i - 1] + val;
}
data += stride;