[llvm-bugs] Issue 23575 in oss-fuzz: llvm:clang-fuzzer: Stack-overflow in maybeDiagnoseIDCharCompat

[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-2020-06-20
Type: Bug

New issue 23575 by ClusterFuzz-External: llvm:clang-fuzzer: Stack-overflow in maybeDiagnoseIDCharCompat
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=23575

Detailed Report: https://oss-fuzz.com/testcase?key=4845348253335552

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

Crash Type: Stack-overflow
Crash Address: 0x7ffdf6ecffd8
Crash State:
  maybeDiagnoseIDCharCompat
  clang::Lexer::LexUnicode
  clang::Lexer::LexTokenInternal
  
Sanitizer: address (ASAN)

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=202006170303:202006180303

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=4845348253335552

Issue filed automatically.

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