[llvm-bugs] Issue 16758 in oss-fuzz: llvm:clang-format-fuzzer: Null-dereference READ in clang::format::TokenAnnotator::splitPenalty

[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-2019-08-25
Type: Bug

New issue 16758 by ClusterFuzz-External: llvm:clang-format-fuzzer:  
Null-dereference READ in clang::format::TokenAnnotator::splitPenalty
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=16758

Detailed Report: https://oss-fuzz.com/testcase?key=5646479716253696

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

Crash Type: Null-dereference READ
Crash Address: 0x000000000050
Crash State:
   clang::format::TokenAnnotator::splitPenalty
   clang::format::TokenAnnotator::calculateFormattingInformation
   clang::format::Formatter::analyze

Sanitizer: address (ASAN)

Regressed:  
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201709130450:201709140449

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=5646479716253696

Issue filed automatically.

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

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