[llvm-bugs] Issue 16329 in oss-fuzz: llvm:llvm-opt-fuzzer--x86_64-gvn: Heap-buffer-overflow in std::__1::enable_if<is_hashable_data<char const>::value, llvm::hash_code>::type

[ClusterFuzz-External via monorail via llvm-bugs]

Status: New
Owner: ----
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Labels: ClusterFuzz Stability-Memory-AddressSanitizer Reproducible  
Engine-libfuzzer OS-Linux Proj-llvm Security_Severity-Medium  
Reported-2019-08-10
Type: Bug-Security

New issue 16329 by ClusterFuzz-External: llvm:llvm-opt-fuzzer--x86_64-gvn:  
Heap-buffer-overflow in std::__1::enable_if<is_hashable_data<char  
const>::value, llvm::hash_code>::type
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=16329

Detailed report: https://oss-fuzz.com/testcase?key=6308289423343616

Project: llvm
Fuzzing engine: libFuzzer
Fuzz target: llvm-opt-fuzzer--x86_64-gvn
Job Type: libfuzzer_asan_llvm
Platform Id: linux

Crash Type: Heap-buffer-overflow READ 8
Crash Address: 0x61d0000046c8
Crash State:
   std::__1::enable_if<is_hashable_data<char const>::value,  
llvm::hash_code>::type
   bool llvm::DenseMapBase<llvm::DenseMap<llvm::StringRef,  
llvm::detail::DenseSetEm
   llvm::detail::DenseSetPair<llvm::StringRef>*  
llvm::DenseMapBase<llvm::DenseMap<l

Sanitizer: address (ASAN)

Recommended Security Severity: Medium

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201905290205:201905310209

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=6308289423343616

Issue filed automatically.

See https://github.com/google/oss-fuzz/blob/master/docs/reproducing.md for  
instructions to reproduce this bug locally.

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