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avcodec/alsdec: Fix integer overflow with shifting samples

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Fixes: signed integer overflow: -346039050 * 8 cannot be represented in type 'int'
Fixes: 15283/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALS_fuzzer-5692700268953600

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 a3bd4b260e)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer
2019-06-19 23:27:21 +02:00
parent b5c293030a
commit 9dd910ad2a
1 changed files with 1 additions and 1 deletions
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libavcodec/alsdec.c
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@@ -1039,7 +1039,7 @@ static int decode_block(ALSDecContext *ctx, ALSBlockData *bd)
if (*bd->shift_lsbs)
for (smp = 0; smp < bd->block_length; smp++)
bd->raw_samples[smp] <<= *bd->shift_lsbs;
bd->raw_samples[smp] = (unsigned)bd->raw_samples[smp] << *bd->shift_lsbs;
return 0;
}