[llvm-bugs] Issue 14247 in oss-fuzz: llvm/llvm-microsoft-demangle-fuzzer: Heap-buffer-overflow in llvm::ms_demangle::Node** llvm::ms_demangle::ArenaAllocator::allocArray<llvm::ms

[ClusterFuzz-External via monorail via llvm-bugs]

Comment #3 on issue 14247 by ClusterFuzz-External:  
llvm/llvm-microsoft-demangle-fuzzer: Heap-buffer-overflow in  
llvm::ms_demangle::Node**  
llvm::ms_demangle::ArenaAllocator::allocArray<llvm::ms
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=14247#c3

ClusterFuzz has detected this issue as fixed in range  
201904160252:201904180259.

Detailed report: https://oss-fuzz.com/testcase?key=5105728374702080

Project: llvm
Fuzzer: libFuzzer_llvm_llvm-microsoft-demangle-fuzzer
Fuzz target binary: llvm-microsoft-demangle-fuzzer
Job Type: libfuzzer_asan_llvm
Platform Id: linux

Crash Type: Heap-buffer-overflow WRITE {*}
Crash Address: 0x6210000bc900
Crash State:
   llvm::ms_demangle::Node**  
llvm::ms_demangle::ArenaAllocator::allocArray<llvm::ms
   llvm::ms_demangle::Demangler::demangleNameScopeChain
   llvm::ms_demangle::Demangler::demangleMemberPointerType

Sanitizer: address (ASAN)

Recommended Security Severity: High

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201901070410:201901080410
Fixed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201904160252:201904180259

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=5105728374702080

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

If you suspect that the result above is incorrect, try re-doing that job on  
the test case report page.

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