[llvm-bugs] Issue 20631 in oss-fuzz: llvm:clang-fuzzer: Stack-overflow in clang::Preprocessor::PeekAhead

[ClusterFuzz-External via monorail via llvm-bugs]

Status: New
Owner: ----
CC: kcc at google.com, mascasa at google.com, jdevlieg... at apple.com, igm... at gmail.com, davg at google.com, mitchp at google.com, bigchees... at gmail.com, eneyman at google.com, llvm-b... at lists.llvm.org, jfb at chromium.org, v... at apple.com, mitchphi... at outlook.com, xpl... at gmail.com, akils... at apple.com 
Labels: ClusterFuzz Stability-Memory-AddressSanitizer Reproducible Engine-libfuzzer OS-Linux Proj-llvm Reported-2020-02-11
Type: Bug

New issue 20631 by ClusterFuzz-External: llvm:clang-fuzzer: Stack-overflow in clang::Preprocessor::PeekAhead
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=20631

Detailed Report: https://oss-fuzz.com/testcase?key=5482538565107712

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

Crash Type: Stack-overflow
Crash Address: 0x7fffd1434f08
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=202002070552:202002090525

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5482538565107712

Issue filed automatically.

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