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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-10-01 00:16:20 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-01-06 11:30:43 +0100 |
| commit | d08362ecbc5863fdea4e641baf3e996082db8c9b (patch) | |
| tree | 02c9f0284b99d1420264bcde95c677f044fa4a62 | |
| parent | c9be168ac103edf9610334276a1a20c97bc5d444 (diff) | |
| download | ffmpeg-d08362ecbc5863fdea4e641baf3e996082db8c9b.tar.gz | |
avcodec/alac: Fix integer overflow in LPC
Fixes: signed integer overflow: 2147483628 + 128 cannot be represented in type 'int'
Fixes: 17783/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALAC_fuzzer-5146470595952640
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 44b73a0568f8ad5993ec79b29873151f316bf95c)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/alac.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/alac.c b/libavcodec/alac.c index 018248ef6a..a6468b7137 100644 --- a/libavcodec/alac.c +++ b/libavcodec/alac.c @@ -215,7 +215,7 @@ static void lpc_prediction(int32_t *error_buffer, uint32_t *buffer_out, /* LPC prediction */ for (j = 0; j < lpc_order; j++) val += (pred[j] - d) * lpc_coefs[j]; - val = (val + (1 << (lpc_quant - 1))) >> lpc_quant; + val = (val + (1LL << (lpc_quant - 1))) >> lpc_quant; val += d + error_val; buffer_out[i] = sign_extend(val, bps); |