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avcodec/rasc: Check that the number of moves is less than or equal the number of pixels 

Fixes: OOM
Fixes: 10307/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RASC_fuzzer-5393974559244288

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 2018-12-15 00:10:17 +01:00
parent b11b3d2585
commit 092cb17983
1 changed files with 1 additions and 1 deletions
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2
libavcodec/rasc.c
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@ -215,7 +215,7 @@ static int decode_move(AVCodecContext *avctx,
bytestream2_skip(gb, 8);
compression = bytestream2_get_le32(gb);
if (nb_moves > INT32_MAX / 16)
if (nb_moves > INT32_MAX / 16 || nb_moves > avctx->width * avctx->height)
return AVERROR_INVALIDDATA;
uncompressed_size = 16 * nb_moves;