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avcodec/mpegaudiodec_template: use unsigned shift in handle_crc()

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Fixes: left shift of 192 by 24 places cannot be represented in type 'int'
Fixes: 49577/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MP1FLOAT_fuzzer-5205996678545408

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 7086491fa0)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-08-14 23:30:22 +02:00
parent 50698086ee
commit a90844d443
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1 changed files with 1 additions and 1 deletions
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libavcodec/mpegaudiodec_template.c
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@ -372,7 +372,7 @@ static int handle_crc(MPADecodeContext *s, int sec_len)
crc_val = av_crc(crc_tab, crc_val, &buf[6], sec_byte_len);
AV_WB32(tmp_buf,
((buf[6 + sec_byte_len] & (0xFF00 >> sec_rem_bits)) << 24) +
((buf[6 + sec_byte_len] & (0xFF00U >> sec_rem_bits)) << 24) +
((s->crc << 16) >> sec_rem_bits));
crc_val = av_crc(crc_tab, crc_val, tmp_buf, 3);