[llvm-bugs] Issue 29599 in oss-fuzz: llvm:llvm-isel-fuzzer--x86_64-O2: Heap-use-after-free in lowerConstantIntrinsics

[ClusterFuzz-External via monorail via llvm-bugs]

Status: New
Owner: ----
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Labels: ClusterFuzz Stability-Memory-AddressSanitizer Reproducible Engine-libfuzzer OS-Linux Proj-llvm Security_Severity-High Reported-2021-01-15
Type: Bug-Security

New issue 29599 by ClusterFuzz-External: llvm:llvm-isel-fuzzer--x86_64-O2: Heap-use-after-free in lowerConstantIntrinsics
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=29599

Detailed Report: https://oss-fuzz.com/testcase?key=5262146025947136

Project: llvm
Fuzzing Engine: libFuzzer
Fuzz Target: llvm-isel-fuzzer--x86_64-O2
Job Type: libfuzzer_asan_llvm
Platform Id: linux

Crash Type: Heap-use-after-free READ 1
Crash Address: 0x607000011218
Crash State:
  lowerConstantIntrinsics
  llvm::FPPassManager::runOnFunction
  llvm::FPPassManager::runOnModule
  
Sanitizer: address (ASAN)

Recommended Security Severity: High

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=201910130337:201910140329

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5262146025947136

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
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