[llvm-bugs] Issue 26157 in oss-fuzz: llvm:llvm-opt-fuzzer--x86_64-strength_reduce: Null-dereference READ in ReduceLoopStrength

ClusterFuzz-External via monorail via llvm-bugs llvm-bugs at lists.llvm.org
Mon Oct 5 09:49:44 PDT 2020


Status: New
Owner: ----
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Labels: ClusterFuzz Reproducible Stability-Memory-MemorySanitizer Engine-libfuzzer OS-Linux Proj-llvm Reported-2020-10-05
Type: Bug

New issue 26157 by ClusterFuzz-External: llvm:llvm-opt-fuzzer--x86_64-strength_reduce: Null-dereference READ in ReduceLoopStrength
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=26157

Detailed Report: https://oss-fuzz.com/testcase?key=5716510489968640

Project: llvm
Fuzzing Engine: libFuzzer
Fuzz Target: llvm-opt-fuzzer--x86_64-strength_reduce
Job Type: libfuzzer_msan_llvm
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  ReduceLoopStrength
  llvm::LoopStrengthReducePass::run
  llvm::detail::PassModel<llvm::Loop, llvm::LoopStrengthReducePass, llvm::Preserve
  
Sanitizer: memory (MSAN)

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_msan_llvm&range=202010040615:202010050619

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5716510489968640

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).
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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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