// Copyright 2016 The Go Authors. All rights reserved. | |
// Use of this source code is governed by a BSD-style | |
// license that can be found in the LICENSE file. | |
//go:build amd64 && (linux || darwin) | |
package sha1_test | |
import ( | |
"crypto/sha1" | |
"syscall" | |
"testing" | |
) | |
func TestOutOfBoundsRead(t *testing.T) { | |
const pageSize = 4 << 10 | |
data, err := syscall.Mmap(0, 0, 2*pageSize, syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_ANON|syscall.MAP_PRIVATE) | |
if err != nil { | |
panic(err) | |
} | |
if err := syscall.Mprotect(data[pageSize:], syscall.PROT_NONE); err != nil { | |
panic(err) | |
} | |
for i := 0; i < pageSize; i++ { | |
sha1.Sum(data[pageSize-i : pageSize]) | |
} | |
} |