[llvm-bugs] Issue 17257 in oss-fuzz: llvm:llvm-dwarfdump-fuzzer: Heap-buffer-overflow in llvm::DWARFFormValue::dump

[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-2019-09-16
Type: Bug-Security

New issue 17257 by ClusterFuzz-External: llvm:llvm-dwarfdump-fuzzer:  
Heap-buffer-overflow in llvm::DWARFFormValue::dump
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=17257

Detailed Report: https://oss-fuzz.com/testcase?key=5768932048240640

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: 0x622000002f80
Crash State:
   llvm::DWARFFormValue::dump
   dumpAttribute
   llvm::DWARFDie::dump

Sanitizer: address (ASAN)

Recommended Security Severity: Medium

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201708291805:201708300005

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=5768932048240640

Issue filed automatically.

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

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