[llvm-bugs] Issue 25203 in oss-fuzz: llvm:llvm-isel-fuzzer--aarch64-gisel: ASSERT: ShiftAmt <= BitWidth && "Invalid shift amount"

[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 Reported-2020-08-25
Type: Bug

New issue 25203 by ClusterFuzz-External: llvm:llvm-isel-fuzzer--aarch64-gisel: ASSERT: ShiftAmt <= BitWidth && "Invalid shift amount"
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=25203

Detailed Report: https://oss-fuzz.com/testcase?key=5679260273213440

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

Crash Type: ASSERT
Crash Address: 
Crash State:
  ShiftAmt <= BitWidth && "Invalid shift amount"
  llvm::GISelKnownBits::computeKnownBitsImpl
  llvm::GISelKnownBits::getKnownBits
  
Sanitizer: address (ASAN)

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_asan_llvm&range=202008240603:202008250614

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5679260273213440

Issue filed automatically.

See https://google.github.io/oss-fuzz/advanced-topics/reproducing for instructions to reproduce this bug locally.
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