[llvm-bugs] Issue 6553 in oss-fuzz: llvm/llvm-dwarfdump-fuzzer: Heap-buffer-overflow in llvm::StringMapImpl::LookupBucketFor

[ClusterFuzz-External via monorail via llvm-bugs]

Comment #2 on issue 6553 by ClusterFuzz-External:  
llvm/llvm-dwarfdump-fuzzer: Heap-buffer-overflow in  
llvm::StringMapImpl::LookupBucketFor
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=6553#c2

ClusterFuzz has detected this issue as fixed in range  
201802260623:201802270628.

Detailed report: https://oss-fuzz.com/testcase?key=5069891506798592

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 1
Crash Address: 0x60c0000003b2
Crash State:
   llvm::StringMapImpl::LookupBucketFor
   std::__1::pair<llvm::StringMapIterator<char>, bool> llvm::StringMap<char,  
llvm::
   llvm::object::WasmObjectFile::parseLinkingSectionComdat

Sanitizer: address (ASAN)

Recommended Security Severity: Medium

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201801090613:201801100627
Fixed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201802260623:201802270628

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=5069891506798592

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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