Status: New
Owner: ----
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Labels: ClusterFuzz Stability-Memory-AddressSanitizer Reproducible
Engine-libfuzzer Proj-llvm Security_Severity-High Reported-2019-05-23
Type: Bug-Security
New issue 14917 by ClusterFuzz-External:
llvm/llvm-opt-fuzzer--x86_64-loop_vectorize: Heap-use-after-free in
WriteAsOperandInternal
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=14917
Detailed report: https://oss-fuzz.com/testcase?key=5692243106594816
Project: llvm
Fuzzer: libFuzzer_llvm_llvm-opt-fuzzer--x86_64-loop_vectorize
Fuzz target binary: llvm-opt-fuzzer--x86_64-loop_vectorize
Job Type: libfuzzer_asan_llvm
Platform Id: linux
Crash Type: Heap-use-after-free READ 4
Crash Address: 0x606000008194
Crash State:
WriteAsOperandInternal
AssemblyWriter::printInstruction
llvm::Value::print
Sanitizer: address (ASAN)
Recommended Security Severity: High
Regressed:
https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201802190622:201802200626
Reproducer Testcase:
https://oss-fuzz.com/download?testcase_id=5692243106594816
Issue filed automatically.
See https://github.com/google/oss-fuzz/blob/master/docs/reproducing.md 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.
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