[llvm-bugs] Issue 28077 in oss-fuzz: llvm:llvm-dwarfdump-fuzzer: Heap-buffer-overflow in llvm::StringMapImpl::LookupBucketFor

ClusterFuzz-External via monorail via llvm-bugs llvm-bugs at lists.llvm.org
Sun Nov 29 20:10:01 PST 2020


Status: New
Owner: ----
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Labels: ClusterFuzz Stability-Memory-AddressSanitizer Reproducible Engine-libfuzzer OS-Linux Proj-llvm Security_Severity-Medium Reported-2020-11-30
Type: Bug-Security

New issue 28077 by ClusterFuzz-External: llvm:llvm-dwarfdump-fuzzer: Heap-buffer-overflow in llvm::StringMapImpl::LookupBucketFor
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=28077

Detailed Report: https://oss-fuzz.com/testcase?key=5071836601384960

Project: llvm
Fuzzing Engine: libFuzzer
Fuzz Target: llvm-dwarfdump-fuzzer
Job Type: libfuzzer_asan_llvm
Platform Id: linux

Crash Type: Heap-buffer-overflow READ 1
Crash Address: 0x607000000148
Crash State:
  llvm::StringMapImpl::LookupBucketFor
  std::__1::pair<llvm::StringMapIterator<llvm::NoneType>, bool> llvm::StringMap<ll
  llvm::object::WasmObjectFile::parseLinkingSectionComdat
  
Sanitizer: address (ASAN)

Recommended Security Severity: Medium

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201901150426:201901160416

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5071836601384960

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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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. Comments on individual Monorail issues are not monitored.

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