llvm:llvm-isel-fuzzer--wasm32-O2: Use-after-poison in WebAssemblyRegStackify::runOnMachineFunction

2020-02-19T08:40:20
ID OSSFUZZ-20785
Type ossfuzz
Reporter Google
Modified 2020-02-20T15:52:26

Description

Detailed Report: https://oss-fuzz.com/testcase?key=5717684832698368

Project: llvm Fuzzing Engine: libFuzzer Fuzz Target: llvm-isel-fuzzer--wasm32-O2 Job Type: libfuzzer_asan_llvm Platform Id: linux

Crash Type: Use-after-poison READ 8 Crash Address: 0x621000071080 Crash State: WebAssemblyRegStackify::runOnMachineFunction llvm::MachineFunctionPass::runOnFunction llvm::FPPassManager::runOnFunction

Sanitizer: address (ASAN)

Recommended Security Severity: High

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=202002180351:202002190347

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5717684832698368

Issue filed automatically.

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