[llvm-bugs] Issue 56526 in oss-fuzz: llvm:llvm-dwarfdump-fuzzer: Heap-buffer-overflow in llvm::xxHash64

[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-2023-03-02
Type: Bug-Security

New issue 56526 by ClusterFuzz-External: llvm:llvm-dwarfdump-fuzzer: Heap-buffer-overflow in llvm::xxHash64
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=56526

Detailed Report: https://oss-fuzz.com/testcase?key=4820852903641088

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::xxHash64
  llvm::StringMapImpl::LookupBucketFor
  std::__1::pair<llvm::StringMapIterator<std::__1::nullopt_t>, bool> llvm::StringM
  
Sanitizer: address (ASAN)

Recommended Security Severity: Medium

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=202210040607:202303010601

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=4820852903641088

Issue filed automatically.

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