[llvm-bugs] Issue 18465 in oss-fuzz: llvm:clang-objc-fuzzer: Null-dereference READ in clang::ObjCMethodDecl::getOverriddenMethods

[ClusterFuzz-External via monorail via llvm-bugs]

Status: New
Owner: ----
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Labels: ClusterFuzz Reproducible Stability-Memory-MemorySanitizer  
Engine-libfuzzer OS-Linux Proj-llvm Reported-2019-10-22
Type: Bug

New issue 18465 by ClusterFuzz-External: llvm:clang-objc-fuzzer:  
Null-dereference READ in clang::ObjCMethodDecl::getOverriddenMethods
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=18465

Detailed Report: https://oss-fuzz.com/testcase?key=5070098498322432

Project: llvm
Fuzzing Engine: libFuzzer
Fuzz Target: clang-objc-fuzzer
Job Type: libfuzzer_msan_llvm
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
   clang::ObjCMethodDecl::getOverriddenMethods
   clang::ObjCMethodDecl::findPropertyDecl
   clang::Sema::DiagnoseUseOfDecl

Sanitizer: memory (MSAN)

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_msan_llvm&range=201910210337:201910220425

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=5070098498322432

Issue filed automatically.

See https://google.github.io/oss-fuzz/advanced-topics/reproducing for  
instructions to reproduce this bug locally.
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