[llvm-bugs] Issue 9571 in oss-fuzz: llvm/llvm-dwarfdump-fuzzer: Heap-buffer-overflow in llvm::DataExtractor::getU32

[ClusterFuzz-External via monorail via llvm-bugs]

Comment #2 on issue 9571 by ClusterFuzz-External:  
llvm/llvm-dwarfdump-fuzzer: Heap-buffer-overflow in  
llvm::DataExtractor::getU32
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=9571#c2

ClusterFuzz has detected this issue as fixed in range  
201808080254:201808081857.

Detailed report: https://oss-fuzz.com/testcase?key=4561877290975232

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

Crash Type: Heap-buffer-overflow READ 4
Crash Address: 0x605000000721
Crash State:
   llvm::DataExtractor::getU32
   llvm::DWARFUnitIndex::parseImpl
   llvm::DWARFUnitIndex::parse

Sanitizer: address (ASAN)

Recommended Security Severity: Medium

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201804120529:201804130530
Fixed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201808080254:201808081857

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=4561877290975232

See https://github.com/google/oss-fuzz/blob/master/docs/reproducing.md for  
more information.

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

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