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avcodec/ra144: Fix integer overflow in ff_eval_refl()

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Fixes: signed integer overflow: -4096 * -524288 cannot be represented in type 'int'
Fixes: 8650/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_RA_144_fuzzer-5734816036159488

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 b31189881a4cf54b0057ecf3eab917ad56eecfea)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-06-21 23:08:32 +02:00
parent 35c365f6ef
commit 80b2041c8c
1 changed files with 2 additions and 2 deletions
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4
libavcodec/ra144.c
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@ -1569,11 +1569,11 @@ int ff_eval_refl(int *refl, const int16_t *coefs, AVCodecContext *avctx)
b = 0x1000000 / b;
for (j=0; j <= i; j++) {
#if CONFIG_FTRAPV
int a = bp2[j] - ((refl[i+1] * bp2[i-j]) >> 12);
int a = bp2[j] - ((int)(refl[i+1] * (unsigned)bp2[i-j]) >> 12);
if((int)(a*(unsigned)b) != a*(int64_t)b)
return 1;
#endif
bp1[j] = (int)((bp2[j] - ((refl[i+1] * bp2[i-j]) >> 12)) * (unsigned)b) >> 12;
bp1[j] = (int)((bp2[j] - ((int)(refl[i+1] * (unsigned)bp2[i-j]) >> 12)) * (unsigned)b) >> 12;
}
if ((unsigned) bp1[i] + 0x1000 > 0x1fff)