Fixes: left shift of negative value -4
Fixes: 25723/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_TAK_fuzzer-6250580752990208
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
for (i = 0; i < length; i++) {
int32_t a = p1[i];
int32_t b = p2[i];
- b = dfactor * (b >> dshift) + 128 >> 8 << dshift;
+ b = (unsigned)(dfactor * (b >> dshift) + 128 >> 8) << dshift;
p1[i] = b - a;
}
}