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avcodec/dss_sp: Fix multiple runtime error: signed integer overflow: -15699 * -164039 cannot be represented in type 'int'

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Fixed: 1409/clusterfuzz-testcase-minimized-5237365020819456

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-08 15:40:30 +02:00
parent 0075d9eced
commit ea59ef0c03
1 changed files with 2 additions and 2 deletions
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4
libavcodec/dss_sp.c
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@ -33,7 +33,7 @@
#define DSS_SP_FRAME_SIZE 42
#define DSS_SP_SAMPLE_COUNT (66 * SUBFRAMES)
#define DSS_SP_FORMULA(a, b, c) (((((a) * (1 << 15)) + (b) * (c)) + 0x4000) >> 15)
#define DSS_SP_FORMULA(a, b, c) ((int)((((a) * (1 << 15)) + (b) * (unsigned)(c)) + 0x4000) >> 15)
typedef struct DssSpSubframe {
int16_t gain;
@ -524,7 +524,7 @@ static void dss_sp_shift_sq_sub(const int32_t *filter_buf,
tmp = dst[a] * filter_buf[0];
for (i = 14; i > 0; i--)
tmp -= error_buf[i] * filter_buf[i];
tmp -= error_buf[i] * (unsigned)filter_buf[i];
for (i = 14; i > 0; i--)
error_buf[i] = error_buf[i - 1];