[llvm-bugs] Issue 19704 in oss-fuzz: llvm:clang-objc-fuzzer: Segv on unknown address in LValue::addUnsizedArray

[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 Security_Severity-High  
Reported-2019-12-26
Type: Bug-Security

New issue 19704 by ClusterFuzz-External: llvm:clang-objc-fuzzer: Segv on  
unknown address in LValue::addUnsizedArray
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19704

Detailed Report: https://oss-fuzz.com/testcase?key=5720597908946944

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

Crash Type: Segv on unknown address
Crash Address:
Crash State:
   LValue::addUnsizedArray
   PointerExprEvaluator::VisitCastExpr
   clang::StmtVisitorBase<llvm::make_const_ptr, PointerExprEvaluator,  
bool>::Visit

Sanitizer: memory (MSAN)

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_msan_llvm&range=201911200438:201911230451

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=5720597908946944

Issue filed automatically.

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