[llvm-bugs] Issue 17706 in oss-fuzz: llvm:clang-fuzzer: Stack-overflow in clang::Preprocessor::PeekAhead

[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 Reported-2019-09-25
Type: Bug

New issue 17706 by ClusterFuzz-External: llvm:clang-fuzzer: Stack-overflow  
in clang::Preprocessor::PeekAhead
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=17706

Detailed Report: https://oss-fuzz.com/testcase?key=5685093850415104

Project: llvm
Fuzzing Engine: libFuzzer
Fuzz Target: clang-fuzzer
Job Type: libfuzzer_asan_llvm
Platform Id: linux

Crash Type: Stack-overflow
Crash Address: 0x7ffcf406bd08
Crash State:
   clang::Preprocessor::PeekAhead
   clang::Parser::isCXX11AttributeSpecifier
   clang::Parser::ParseDeclarationSpecifiers

Sanitizer: address (ASAN)

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201909200333:201909210337

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=5685093850415104

Issue filed automatically.

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