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avcodec/kgv1dec: Check that there is enough input for maximum RLE compression

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Fixes: Timeout
Fixes: 4271/clusterfuzz-testcase-4676667768307712

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 3aad94bf2b)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-11-22 20:14:54 +01:00
parent 42b9df5a98
commit 857c5fa976
1 changed files with 3 additions and 0 deletions
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3
libavcodec/kgv1dec.c
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@ -62,6 +62,9 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
h = (buf[1] + 1) * 8;
buf += 2;
if (avpkt->size < 2 + w*h / 513)
return AVERROR_INVALIDDATA;
if (w != avctx->width || h != avctx->height) {
av_freep(&c->frame_buffer);
av_freep(&c->last_frame_buffer);