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avcodec/fmvc: avoid copying uninitialized data 

Fixes: Timeout
Fixes: 30049/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FMVC_fuzzer-5986909455253504

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-02-02 22:29:25 +01:00
parent c000a91288
commit b24d3bfe66
1 changed files with 2 additions and 0 deletions
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2
libavcodec/fmvc.c
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@ -440,6 +440,8 @@ static int decode_frame(AVCodecContext *avctx, void *data,
memcpy(dst, src, avctx->width * s->bpp);
dst -= frame->linesize[0];
src += s->stride * 4;
if (bytestream2_tell_p(pb) < y*s->stride * 4)
break;
}
} else {
unsigned block, nb_blocks;