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avcodec/apac: use unsigned for sample residual

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Fixes: signed integer overflow: -2146670226 + -2227242 cannot be represented in type 'int'
Fixes: 51943/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_APAC_fuzzer-5779018251370496

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 2022-11-16 22:01:34 +01:00
parent 8f975641d7
commit b2c1a0fc2b
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1 changed files with 1 additions and 1 deletions
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libavcodec/apac.c
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@ -208,7 +208,7 @@ static int apac_decode(AVCodecContext *avctx, AVFrame *frame,
for (int i = 0; i < c->block_length; i++) {
int val = get_bits_long(gb, c->bit_length);
int delta = (val & 1) ? ~(val >> 1) : (val >> 1);
unsigned delta = (val & 1) ? ~(val >> 1) : (val >> 1);
int sample;
delta += c->last_delta;