OSV-2021-991 Dynamic-stack-buffer-overflow in fmt::v8::detail::dragonbox::umul192_upper64

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=36110 Crash type: Dynamic-stack-buffer-overflow WRITE 8 Crash state: fmt::v8::detail::dragonbox::umul192upper64 fmt::v8::detail::dragonbox::cacheaccessor::computemul fmt::v8::detail::dragonbox::decimalfp...