[llvm-bugs] Issue 29632 in oss-fuzz: llvm:clang-fuzzer: Stack-overflow in clang::Preprocessor::CachingLex

[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-2021-01-16
Type: Bug

New issue 29632 by ClusterFuzz-External: llvm:clang-fuzzer: Stack-overflow in clang::Preprocessor::CachingLex
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=29632

Detailed Report: https://oss-fuzz.com/testcase?key=4807123869499392

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

Crash Type: Stack-overflow
Crash Address: 0x7ffccc7dcad8
Crash State:
  clang::Preprocessor::CachingLex
  clang::Preprocessor::Lex
  clang::Parser::ParseCompoundStatementBody
  
Sanitizer: address (ASAN)

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201905220318:201905242219

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=4807123869499392

Issue filed automatically.

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