[llvm-bugs] Issue 35991 in oss-fuzz: llvm:llvm-opt-fuzzer--x86_64-loop_predication: Null-dereference READ in llvm::hashing::detail::hash_short

[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-2021-07-10
Type: Bug

New issue 35991 by ClusterFuzz-External: llvm:llvm-opt-fuzzer--x86_64-loop_predication: Null-dereference READ in llvm::hashing::detail::hash_short
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35991

Detailed Report: https://oss-fuzz.com/testcase?key=5721861928386560

Project: llvm
Fuzzing Engine: libFuzzer
Fuzz Target: llvm-opt-fuzzer--x86_64-loop_predication
Job Type: libfuzzer_msan_llvm
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  llvm::hashing::detail::hash_short
  std::__1::enable_if<is_hashable_data<char const>::value, llvm::hash_code>::type 
  bool llvm::DenseMapBase<llvm::DenseMap<llvm::StringRef, llvm::detail::DenseSetEm
  
Sanitizer: memory (MSAN)

Crash Revision: https://oss-fuzz.com/revisions?job=libfuzzer_msan_llvm&revision=202011180625

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5721861928386560

Issue filed automatically.

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