OSV-2018-10 UNKNOWN READ in __msan_memcpy.part.51

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=9801 Crash type: UNKNOWN READ Crash state: msanmemcpy.part.51 gvsreadunalignedle gvsvariablesizedarrayisnormal...