[llvm-bugs] Issue 35508 in oss-fuzz: llvm:llvm-opt-fuzzer--x86_64-instcombine: Use-of-uninitialized-value in bool llvm::DenseMapBase<llvm::DenseMap<llvm::StringRef, llvm::detail::DenseSetEm

ClusterFuzz-External via monorail via llvm-bugs llvm-bugs at lists.llvm.org
Wed Jun 23 09:54:25 PDT 2021


Status: New
Owner: ----
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Labels: ClusterFuzz Reproducible Stability-Memory-MemorySanitizer Engine-libfuzzer OS-Linux Proj-llvm Security_Severity-Medium Reported-2021-06-23
Type: Bug-Security

New issue 35508 by ClusterFuzz-External: llvm:llvm-opt-fuzzer--x86_64-instcombine: Use-of-uninitialized-value in bool llvm::DenseMapBase<llvm::DenseMap<llvm::StringRef, llvm::detail::DenseSetEm
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35508

Detailed Report: https://oss-fuzz.com/testcase?key=5155703497687040

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

Crash Type: Use-of-uninitialized-value
Crash Address: 
Crash State:
  bool llvm::DenseMapBase<llvm::DenseMap<llvm::StringRef, llvm::detail::DenseSetEm
  llvm::detail::DenseSetPair<llvm::StringRef>* llvm::DenseMapBase<llvm::DenseMap<l
  llvm::UniqueStringSaver::save
  
Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Crash Revision: https://oss-fuzz.com/revisions?job=libfuzzer_msan_llvm&revision=202007250208

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5155703497687040

Issue filed automatically.

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