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avcodec/alsdec: Fix integer overflow with quant_cof 

Fixes: signed integer overflow: -210824 * 16384 cannot be represented in type 'int'
Fixes: 28670/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALS_fuzzer-5682310846480384

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 2020-12-26 18:55:08 +01:00
parent 58c7d4a3e3
commit 7ce40dde03
1 changed files with 1 additions and 1 deletions
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2
libavcodec/alsdec.c
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@ -762,7 +762,7 @@ static int read_var_block_data(ALSDecContext *ctx, ALSBlockData *bd)
}
for (k = 2; k < opt_order; k++)
quant_cof[k] = (quant_cof[k] * (1 << 14)) + (add_base << 13);
quant_cof[k] = (quant_cof[k] * (1U << 14)) + (add_base << 13);
}
}