Status: New
Owner: ----
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Labels: ClusterFuzz Reproducible Stability-Memory-MemorySanitizer
Engine-libfuzzer OS-Linux Proj-llvm Reported-2019-11-16
Type: Bug
New issue 18969 by ClusterFuzz-External: llvm:clang-objc-fuzzer:
Null-dereference READ in clang::Expr::EvaluateKnownConstInt
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=18969
Detailed Report: https://oss-fuzz.com/testcase?key=5720111675867136
Project: llvm
Fuzzing Engine: libFuzzer
Fuzz Target: clang-objc-fuzzer
Job Type: libfuzzer_msan_llvm
Platform Id: linux
Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
clang::Expr::EvaluateKnownConstInt
clang::FieldDecl::getBitWidthValue
clang::FieldDecl::isZeroLengthBitField
Sanitizer: memory (MSAN)
Regressed:
https://oss-fuzz.com/revisions?job=libfuzzer_msan_llvm&range=201910210337:201910220425
Reproducer Testcase:
https://oss-fuzz.com/download?testcase_id=5720111675867136
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.
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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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