[llvm-bugs] Issue 3227 in oss-fuzz: llvm: Heap-buffer-overflow in readInitExpr

[monor… via monorail via llvm-bugs]

Comment #6 on issue 3227 by  
monor... at clusterfuzz-external.iam.gserviceaccount.com: llvm:  
Heap-buffer-overflow in readInitExpr
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=3227#c6

ClusterFuzz has detected this issue as fixed in range  
201710230449:201710240446.

Detailed report: https://oss-fuzz.com/testcase?key=4903492604919808

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: 0x6030000000ed
Crash State:
   readInitExpr
   llvm::object::WasmObjectFile::parseDataSection
   llvm::object::WasmObjectFile::parseSection

Sanitizer: address (ASAN)

Recommended Security Severity: Medium

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201708280446:201708291805
Fixed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201710230449:201710240446

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=4903492604919808

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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