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avcodec/vmixdec: Fix signed integer overflow in dc 

Fixes: signed integer overflow: 2147483181 + 1024 cannot be represented in type 'int'
Fixes: 61117/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VMIX_fuzzer-5387692433866752

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 2023-09-05 02:17:40 +02:00
parent fb05bc8eee
commit d897f82cf8
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1 changed files with 1 additions and 1 deletions
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libavcodec/vmixdec.c
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@ -148,7 +148,7 @@ static int decode_dcac(AVCodecContext *avctx,
ac_run = get_ue_golomb_long(ac_gb);
}
block[0] = (dc << lshift) + add;
block[0] = ((unsigned)dc << lshift) + (unsigned)add;
s->idsp.idct_put(dst + x, linesize, block);
}