[llvm-bugs] Issue 39045 in oss-fuzz: llvm:llvm-opt-fuzzer--x86_64-guard_widening: ASSERT: isCanonical(Name) && "Expected canonical MDString"

ClusterFuzz-External via monorail via llvm-bugs llvm-bugs at lists.llvm.org
Mon Sep 20 12:42:15 PDT 2021


Status: New
Owner: ----
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Labels: ClusterFuzz Reproducible Stability-Memory-MemorySanitizer Engine-libfuzzer OS-Linux Proj-llvm Reported-2021-09-20
Type: Bug

New issue 39045 by ClusterFuzz-External: llvm:llvm-opt-fuzzer--x86_64-guard_widening: ASSERT: isCanonical(Name) && "Expected canonical MDString"
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=39045

Detailed Report: https://oss-fuzz.com/testcase?key=5319790491729920

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

Crash Type: ASSERT
Crash Address: 
Crash State:
  isCanonical(Name) && "Expected canonical MDString"
  llvm::DIBasicType::getImpl
  llvm::MetadataLoader::MetadataLoaderImpl::parseOneMetadata
  
Sanitizer: memory (MSAN)

Crash Revision: https://oss-fuzz.com/revisions?job=libfuzzer_msan_llvm&revision=202011180625

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5319790491729920

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.
  * add any other useful information.
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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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