[llvm-bugs] Issue 64750 in oss-fuzz: llvm:llvm-opt-fuzzer--x86_64-loop_unswitch: Null-dereference READ in llvm::PointerType::isLoadableOrStorableType

[ClusterFuzz-External via monorail via llvm-bugs]

Status: New
Owner: ----
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Labels: ClusterFuzz Stability-Memory-AddressSanitizer Reproducible OS-Linux Proj-llvm Engine-honggfuzz Reported-2023-12-06
Type: Bug

New issue 64750 by ClusterFuzz-External: llvm:llvm-opt-fuzzer--x86_64-loop_unswitch: Null-dereference READ in llvm::PointerType::isLoadableOrStorableType
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=64750

Detailed Report: https://oss-fuzz.com/testcase?key=5963484336357376

Project: llvm
Fuzzing Engine: honggfuzz
Fuzz Target: llvm-opt-fuzzer--x86_64-loop_unswitch
Job Type: honggfuzz_asan_llvm
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000008
Crash State:
  llvm::PointerType::isLoadableOrStorableType
  BitcodeReader::typeCheckLoadStoreInst
  BitcodeReader::parseFunctionBody
  
Sanitizer: address (ASAN)

Regressed: https://oss-fuzz.com/revisions?job=honggfuzz_asan_llvm&range=202312050608:202312060616

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5963484336357376

Issue filed automatically.

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