[llvm-bugs] Issue 16527 in oss-fuzz: llvm:llvm-isel-fuzzer--aarch64-O2: Use-of-uninitialized-value in CodeGenPrepare::optimizeInst

[ClusterFuzz-External via monorail via llvm-bugs]

Status: New
Owner: ----
CC: kcc at google.com, mascasa at google.com, jdevlieg... at apple.com,  
igm... at gmail.com, mitchp at google.com, bigchees... at gmail.com,  
eneyman at google.com, llvm-b... at lists.llvm.org, jfb at chromium.org,  
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Labels: ClusterFuzz Reproducible Stability-Memory-MemorySanitizer  
Engine-libfuzzer OS-Linux Proj-llvm Security_Severity-Medium  
Reported-2019-08-18
Type: Bug-Security

New issue 16527 by ClusterFuzz-External: llvm:llvm-isel-fuzzer--aarch64-O2:  
Use-of-uninitialized-value in CodeGenPrepare::optimizeInst
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=16527

Detailed Report: https://oss-fuzz.com/testcase?key=6324347450425344

Project: llvm
Fuzzing Engine: libFuzzer
Fuzz Target: llvm-isel-fuzzer--aarch64-O2
Job Type: libfuzzer_msan_llvm
Platform Id: linux

Crash Type: Use-of-uninitialized-value
Crash Address:
Crash State:
   CodeGenPrepare::optimizeInst
   CodeGenPrepare::runOnFunction
   llvm::FPPassManager::runOnFunction

Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Crash Revision:  
https://oss-fuzz.com/revisions?job=libfuzzer_msan_llvm&revision=201906300300

Reproducer Testcase:  
https://oss-fuzz.com/download?testcase_id=6324347450425344

Issue filed automatically.

See https://github.com/google/oss-fuzz/blob/master/docs/reproducing.md for  
instructions to reproduce this bug locally.

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