[llvm-bugs] Issue 19272 in oss-fuzz: llvm:clang-fuzzer: Segv on unknown address in llvm::APInt::udiv

[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-2019-12-07
Type: Bug-Security

New issue 19272 by ClusterFuzz-External: llvm:clang-fuzzer: Segv on unknown  
address in llvm::APInt::udiv
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=19272

Detailed Report: https://oss-fuzz.com/testcase?key=5711340262129664

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

Crash Type: Segv on unknown address
Crash Address:
Crash State:
   llvm::APInt::udiv
   llvm::APInt::sdiv
   ComplexExprEvaluator::VisitBinaryOperator

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=5711340262129664

Issue filed automatically.

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