[llvm-bugs] Issue 30672 in oss-fuzz: llvm:clang-objc-fuzzer: Stack-overflow in clang::Lexer::Lex

ClusterFuzz-External via monorail via llvm-bugs llvm-bugs at lists.llvm.org
Mon Feb 8 15:42:48 PST 2021


Status: New
Owner: ----
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Labels: ClusterFuzz Stability-Memory-AddressSanitizer Reproducible Engine-libfuzzer OS-Linux Proj-llvm Reported-2021-02-08
Type: Bug

New issue 30672 by ClusterFuzz-External: llvm:clang-objc-fuzzer: Stack-overflow in clang::Lexer::Lex
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=30672

Detailed Report: https://oss-fuzz.com/testcase?key=5071104576192512

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

Crash Type: Stack-overflow
Crash Address: 0x7ffc673cfbe8
Crash State:
  clang::Lexer::Lex
  clang::Preprocessor::Lex
  clang::Parser::ParseBlockLiteralExpression
  
Sanitizer: address (ASAN)

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=202102070603:202102080628

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5071104576192512

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
  * mention the fix revision(s).
  * state whether the bug was a short-lived regression or an old bug in any stable releases.
  * add any other useful information.
This information can help downstream consumers.

If you need to contact the OSS-Fuzz team with a question, concern, or any other feedback, please file an issue at https://github.com/google/oss-fuzz/issues. Comments on individual Monorail issues are not monitored.

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