Status: New
Owner: ----
CC: k...@google.com, masc...@google.com, jdevlieg...@apple.com,
igm...@gmail.com, mit...@google.com, bigchees...@gmail.com,
eney...@google.com, llvm-b...@lists.llvm.org, j...@chromium.org,
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akils...@apple.com
Labels: ClusterFuzz Stability-Memory-AddressSanitizer Reproducible
Engine-libfuzzer Proj-llvm Security_Severity-High Reported-2019-04-14
Type: Bug-Security
New 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
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
Reproducer Testcase:
https://oss-fuzz.com/download?testcase_id=5105728374702080
Issue filed automatically.
See https://github.com/google/oss-fuzz/blob/master/docs/reproducing.md for
instructions to reproduce this bug locally.
When you fix this bug, please
* mention the fix revision(s).
* state whether the bug was a short-lived regression or an old bug in any
stable releases.
* add any other useful information.
This information can help downstream consumers.
If you need to contact the OSS-Fuzz team with a question, concern, or any
other feedback, please file an issue at
https://github.com/google/oss-fuzz/issues.
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