OSV-2020-1494 Segv on unknown address in FindDeclaringClass

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=20893 Crash type: Segv on unknown address Crash state: FindDeclaringClass diagnoseBadDirectAccess CheckEffectiveAccess...

llvm:clang-fuzzer: Segv on unknown address in FindDeclaringClass

Detailed Report: https://oss-fuzz.com/testcase?key=5744309964111872 Project: llvm Fuzzing Engine: libFuzzer Fuzz Target: clang-fuzzer Job Type: libfuzzermsanllvm Platform Id: linux Crash Type: Segv on unknown address Crash Address: Crash State: FindDeclaringClass diagnoseBadDirectAccess...